Adding upstream version 86.0.1.upstream/86.0.1 upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
author: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-28 14:29:10 +0000
committer: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-28 14:29:10 +0000
commit: 2aa4a82499d4becd2284cdb482213d541b8804dd (patch)
tree: b80bf8bf13c3766139fbacc530efd0dd9d54394c /widget/tests/window_composition_text_querycontent.xhtml
parent: Initial commit. (diff)
download: firefox-upstream.tar.xz
firefox-upstream.zip
1 files changed, 9632 insertions, 0 deletions
diff --git a/widget/tests/window_composition_text_querycontent.xhtml b/widget/tests/window_composition_text_querycontent.xhtml
new file mode 100644
index 0000000000..5a91f7dc44
--- /dev/null
+++ b/widget/tests/window_composition_text_querycontent.xhtml
@@ -0,0 +1,9632 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css"
+                 type="text/css"?>
+<window title="Testing composition, text and query content events"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js" />
+  <script src="chrome://mochikit/content/tests/SimpleTest/WindowSnapshot.js" />
+
+  <panel id="panel" hidden="true" orient="vertical">
+    <vbox id="vbox">
+      <html:textarea id="textbox" cols="20" rows="4" style="font-size: 36px;"/>
+    </vbox>
+  </panel>
+
+<body  xmlns="http://www.w3.org/1999/xhtml">
+<p id="display">
+<div id="div" style="margin: 0; padding: 0; font-size: 36px;">Here is a text frame.</div>
+<textarea style="margin: 0; font-family: -moz-fixed;" id="textarea" cols="20" rows="4"></textarea><br/>
+<iframe id="iframe" width="300" height="150"
+        src="data:text/html,&lt;textarea id='textarea' cols='20' rows='4'&gt;&lt;/textarea&gt;"></iframe><br/>
+<iframe id="iframe2" width="300" height="150"
+        src="data:text/html,&lt;body onload='document.designMode=%22on%22'&gt;body content&lt;/body&gt;"></iframe><br/>
+<iframe id="iframe3" width="300" height="150"
+        src="data:text/html,&lt;body onload='document.designMode=%22on%22'&gt;body content&lt;/body&gt;"></iframe><br/>
+<iframe id="iframe4" width="300" height="150"
+        src="data:text/html,&lt;div contenteditable id='contenteditable'&gt;&lt;/div&gt;"></iframe><br/>
+<iframe id="iframe5" width="200" height="50" src="data:text/html,&lt;input id='input'&gt;"></iframe>
+<iframe id="iframe6" width="200" height="50" src="data:text/html,&lt;input id='password' type='password'&gt;"></iframe><br/>
+<iframe id="iframe7" width="300" height="150"
+        src="data:text/html,&lt;span contenteditable id='contenteditable'&gt;&lt;/span&gt;"></iframe><br/>
+<input id="input" type="text"/><br/>
+<input id="password" type="password"/><br/>
+</p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+</pre>
+</body>
+
+<script class="testbody" type="application/javascript">
+<![CDATA[
+
+const {Services} = ChromeUtils.import("resource://gre/modules/Services.jsm");
+
+function ok(aCondition, aMessage)
+{
+  window.arguments[0].SimpleTest.ok(aCondition, aMessage);
+}
+
+function is(aLeft, aRight, aMessage)
+{
+  window.arguments[0].SimpleTest.is(aLeft, aRight, aMessage);
+}
+
+function isnot(aLeft, aRight, aMessage)
+{
+  window.arguments[0].SimpleTest.isnot(aLeft, aRight, aMessage);
+}
+
+function isfuzzy(aLeft, aRight, aEpsilon, aMessage) {
+  window.arguments[0].SimpleTest.isfuzzy(aLeft, aRight, aEpsilon, aMessage);
+}
+
+function todo(aCondition, aMessage)
+{
+  window.arguments[0].SimpleTest.todo(aCondition, aMessage);
+}
+
+function todo_is(aLeft, aRight, aMessage)
+{
+  window.arguments[0].SimpleTest.todo_is(aLeft, aRight, aMessage);
+}
+
+function todo_isnot(aLeft, aRight, aMessage)
+{
+  window.arguments[0].SimpleTest.todo_isnot(aLeft, aRight, aMessage);
+}
+
+function isSimilarTo(aLeft, aRight, aAllowedDifference, aMessage)
+{
+  if (Math.abs(aLeft - aRight) <= aAllowedDifference) {
+    ok(true, aMessage);
+  } else {
+    ok(false, aMessage + ", got=" + aLeft + ", expected=" + (aRight - aAllowedDifference) + "~" + (aRight + aAllowedDifference));
+  }
+}
+
+function isGreaterThan(aLeft, aRight, aMessage)
+{
+  ok(aLeft > aRight, aMessage + ", got=" + aLeft + ", expected minimum value=" + aRight);
+}
+
+var div = document.getElementById("div");
+var textarea = document.getElementById("textarea");
+var panel = document.getElementById("panel");
+var textbox = document.getElementById("textbox");
+var iframe = document.getElementById("iframe");
+var iframe2 = document.getElementById("iframe2");
+var iframe3 = document.getElementById("iframe3");
+var contenteditable;
+var windowOfContenteditable;
+var contenteditableBySpan;
+var windowOfContenteditableBySpan;
+var input = document.getElementById("input");
+var password = document.getElementById("password");
+var textareaInFrame;
+
+const nsITextInputProcessorCallback = Ci.nsITextInputProcessorCallback;
+const nsIInterfaceRequestor = Ci.nsIInterfaceRequestor;
+const nsIWebNavigation = Ci.nsIWebNavigation;
+const nsIDocShell = Ci.nsIDocShell;
+
+function waitForTick() {
+  return new Promise(resolve => { SimpleTest.executeSoon(resolve); });
+}
+
+async function waitForEventLoops(aTimes)
+{
+  for (let i = 1; i < aTimes; i++) {
+    await waitForTick();
+  }
+  await new Promise(resolve => { setTimeout(resolve, 20); });
+}
+
+function getEditor(aNode)
+{
+  return aNode.editor;
+}
+
+function getHTMLEditorIMESupport(aWindow)
+{
+  return aWindow.docShell.editor;
+}
+
+const kIsWin = (navigator.platform.indexOf("Win") == 0);
+const kIsMac = (navigator.platform.indexOf("Mac") == 0);
+
+const kLFLen = kIsWin ? 2 : 1;
+const kLF = kIsWin ? "\r\n" : "\n";
+
+function checkQueryContentResult(aResult, aMessage)
+{
+  ok(aResult, aMessage + ": the result is null");
+  if (!aResult) {
+    return false;
+  }
+  ok(aResult.succeeded, aMessage + ": the query content failed");
+  return aResult.succeeded;
+}
+
+function checkContent(aExpectedText, aMessage, aID)
+{
+  if (!aID) {
+    aID = "";
+  }
+  let textContent = synthesizeQueryTextContent(0, 100);
+  if (!checkQueryContentResult(textContent, aMessage +
+                               ": synthesizeQueryTextContent " + aID)) {
+    return false;
+  }
+  is(textContent.text, aExpectedText,
+     aMessage + ": composition string is wrong " + aID);
+  return textContent.text == aExpectedText;
+}
+
+function checkContentRelativeToSelection(aRelativeOffset, aLength, aExpectedOffset, aExpectedText, aMessage, aID)
+{
+  if (!aID) {
+    aID = "";
+  }
+  aMessage += " (aRelativeOffset=" + aRelativeOffset + "): "
+  let textContent = synthesizeQueryTextContent(aRelativeOffset, aLength, true);
+  if (!checkQueryContentResult(textContent, aMessage +
+                               "synthesizeQueryTextContent " + aID)) {
+    return false;
+  }
+  is(textContent.offset, aExpectedOffset,
+     aMessage + "offset is wrong " + aID);
+  is(textContent.text, aExpectedText,
+     aMessage + "text is wrong " + aID);
+  return textContent.offset == aExpectedOffset &&
+         textContent.text == aExpectedText;
+}
+
+function checkSelection(aExpectedOffset, aExpectedText, aMessage, aID)
+{
+  if (!aID) {
+    aID = "";
+  }
+  let selectedText = synthesizeQuerySelectedText();
+  if (!checkQueryContentResult(selectedText, aMessage +
+                               ": synthesizeQuerySelectedText " + aID)) {
+    return false;
+  }
+  is(selectedText.offset, aExpectedOffset,
+     aMessage + ": selection offset is wrong " + aID);
+  is(selectedText.text, aExpectedText,
+     aMessage + ": selected text is wrong " + aID);
+  return selectedText.offset == aExpectedOffset &&
+         selectedText.text == aExpectedText;
+}
+
+function checkIMESelection(aSelectionType, aExpectedFound, aExpectedOffset, aExpectedText, aMessage, aID)
+{
+  if (!aID) {
+    aID = "";
+  }
+  aMessage += " (" + aSelectionType + ")";
+  let selectionType = 0;
+  switch (aSelectionType) {
+    case "RawClause":
+      selectionType = QUERY_CONTENT_FLAG_SELECTION_IME_RAWINPUT;
+      break;
+    case "SelectedRawClause":
+      selectionType = QUERY_CONTENT_FLAG_SELECTION_IME_SELECTEDRAWTEXT;
+      break;
+    case "ConvertedClause":
+      selectionType = QUERY_CONTENT_FLAG_SELECTION_IME_CONVERTEDTEXT;
+      break;
+    case "SelectedClause":
+      selectionType = QUERY_CONTENT_FLAG_SELECTION_IME_SELECTEDCONVERTEDTEXT;
+      break;
+    default:
+      ok(false, aMessage + ": invalid selection type, " + aSelectionType);
+  }
+  isnot(selectionType, 0, aMessage + ": wrong value");
+  let selectedText = synthesizeQuerySelectedText(selectionType);
+  if (!checkQueryContentResult(selectedText, aMessage +
+                               ": synthesizeQuerySelectedText " + aID)) {
+    return false;
+  }
+  is(selectedText.notFound, !aExpectedFound,
+     aMessage + ": selection should " + (aExpectedFound ? "" : "not") + " be found " + aID);
+  if (selectedText.notFound) {
+    return selectedText.notFound == !aExpectedFound;
+  }
+
+  is(selectedText.offset, aExpectedOffset,
+     aMessage + ": selection offset is wrong " + aID);
+  is(selectedText.text, aExpectedText,
+     aMessage + ": selected text is wrong " + aID);
+  return selectedText.offset == aExpectedOffset &&
+         selectedText.text == aExpectedText;
+}
+
+function checkRect(aRect, aExpectedRect, aMessage)
+{
+  is(aRect.left, aExpectedRect.left, aMessage + ": left is wrong");
+  is(aRect.top, aExpectedRect.top, aMessage + " top is wrong");
+  is(aRect.width, aExpectedRect.width, aMessage + ": width is wrong");
+  is(aRect.height, aExpectedRect.height, aMessage + ": height is wrong");
+  return aRect.left == aExpectedRect.left &&
+         aRect.top == aExpectedRect.top &&
+         aRect.width == aExpectedRect.width &&
+         aRect.height == aExpectedRect.height;
+}
+
+function checkRectFuzzy(aRect, aExpectedRect, aEpsilon, aMessage) {
+  isfuzzy(aRect.left, aExpectedRect.left, aEpsilon.left, aMessage + ": left is wrong");
+  isfuzzy(aRect.top, aExpectedRect.top, aEpsilon.top, aMessage + " top is wrong");
+  isfuzzy(aRect.width, aExpectedRect.width, aEpsilon.width, aMessage + ": width is wrong");
+  isfuzzy(aRect.height, aExpectedRect.height, aEpsilon.height, aMessage + ": height is wrong");
+  return aRect.left <= aExpectedRect.left - aEpsilon.left &&
+         aRect.left <= aExpectedRect.left + aEpsilon.left &&
+         aRect.top == aExpectedRect.top - aEpsilon.top &&
+         aRect.top == aExpectedRect.top + aEpsilon.top &&
+         aRect.width == aExpectedRect.width - aEpsilon.width &&
+         aRect.width == aExpectedRect.width + aEpsilon.width &&
+         aRect.height == aExpectedRect.height - aEpsilon.height &&
+         aRect.height == aExpectedRect.height + aEpsilon.height;
+}
+
+function checkRectArray(aQueryTextRectArrayResult, aExpectedTextRectArray, aMessage)
+{
+  for (let i = 1; i < aExpectedTextRectArray.length; ++i) {
+    let rect = { left: {}, top: {}, width: {}, height: {} };
+    try {
+      aQueryTextRectArrayResult.getCharacterRect(i, rect.left, rect.top, rect.width, rect.height);
+    } catch (e) {
+      ok(false, aMessage + ": failed to retrieve " + i + "th rect (" + e + ")");
+      return false;
+    }
+    function toRect(aRect)
+    {
+      return { left: aRect.left.value, top: aRect.top.value, width: aRect.width.value, height: aRect.height.value };
+    }
+    if (!checkRect(toRect(rect), aExpectedTextRectArray[i], aMessage + " " + i + "th rect")) {
+      return false;
+    }
+  }
+  return true;
+}
+
+function checkRectContainsRect(aRect, aContainer, aMessage)
+{
+  let container = { left: Math.ceil(aContainer.left),
+                    top:  Math.ceil(aContainer.top),
+                    width: Math.floor(aContainer.width),
+                    height: Math.floor(aContainer.height) };
+
+  let ret = container.left <= aRect.left &&
+            container.top <= aRect.top &&
+            container.left + container.width >= aRect.left + aRect.width &&
+            container.top + container.height >= aRect.top + aRect.height;
+  ret = ret && aMessage;
+  ok(ret, aMessage + " container={ left=" + container.left + ", top=" +
+     container.top + ", width=" + container.width + ", height=" +
+     container.height + " } rect={ left=" + aRect.left + ", top=" + aRect.top +
+     ", width=" + aRect.width + ", height=" + aRect.height + " }");
+  return ret;
+}
+
+// eslint-disable-next-line complexity
+function runUndoRedoTest()
+{
+  textarea.value = "";
+  textarea.focus();
+
+  // input raw characters
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306D",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "," },
+    });
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306D\u3053",
+        "clauses":
+        [
+          { "length": 2, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 },
+      "key": { key: "b" },
+    });
+
+  // convert
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u732B",
+        "clauses":
+        [
+          { "length": 1,
+            "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: " " },
+    });
+
+  // commit
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter" } });
+
+  // input raw characters
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u307E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "j" },
+    });
+
+  // cancel the composition
+  synthesizeComposition({ type: "compositioncommit", data: "", key: { key: "KEY_Escape" } });
+
+  // input raw characters
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3080",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "]" },
+    });
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3080\u3059",
+        "clauses":
+        [
+          { "length": 2, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 },
+      "key": { key: "r" },
+    });
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3080\u3059\u3081",
+        "clauses":
+        [
+          { "length": 3, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 3, "length": 0 },
+      "key": { key: "/" },
+    });
+
+  // convert
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u5A18",
+        "clauses":
+        [
+          { "length": 1,
+            "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: " " },
+    });
+
+  // commit
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter" } });
+
+  sendString(" meant");
+  synthesizeKey("KEY_Backspace");
+  synthesizeKey("s \"cat-girl\". She is a ");
+
+  // input raw characters
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3088",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "9" },
+    });
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3088\u3046",
+        "clauses":
+        [
+          { "length": 2, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 },
+      "key": { key: "4" },
+    });
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3088\u3046\u304b",
+        "clauses":
+        [
+          { "length": 3, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 3, "length": 0 },
+      "key": { key: "t" },
+    });
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3088\u3046\u304b\u3044",
+        "clauses":
+        [
+          { "length": 4, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 4, "length": 0 },
+      "key": { key: "e" },
+    });
+
+  // convert
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u5996\u602a",
+        "clauses":
+        [
+          { "length": 2, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 },
+      "key": { key: " " },
+    });
+
+  // commit
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "Enter" } });
+
+  synthesizeKey("KEY_Backspace", {repeat: 12});
+
+  let i = 0;
+  if (!checkContent("\u732B\u5A18 means \"cat-girl\".",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(20, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true});
+
+  if (!checkContent("\u732B\u5A18 means \"cat-girl\". She is a \u5996\u602A",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(32, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true});
+
+  if (!checkContent("\u732B\u5A18 means \"cat-girl\". She is a ",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(30, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true});
+
+  if (!checkContent("\u732B\u5A18 mean",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(7, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true});
+
+  if (!checkContent("\u732B\u5A18 meant",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(8, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true});
+
+  if (!checkContent("\u732B\u5A18",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(2, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true});
+
+  if (!checkContent("\u732B",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(1, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true});
+
+  // XXX this is unexpected behavior, see bug 258291
+  if (!checkContent("\u732B",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(1, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true});
+
+  if (!checkContent("",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(0, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true});
+
+  if (!checkContent("",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(0, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true, shiftKey: true});
+
+  if (!checkContent("\u732B",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(1, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true, shiftKey: true});
+
+  // XXX this is unexpected behavior, see bug 258291
+  if (!checkContent("\u732B",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(1, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true, shiftKey: true});
+
+  if (!checkContent("\u732B\u5A18",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(2, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true, shiftKey: true});
+
+  if (!checkContent("\u732B\u5A18 meant",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(8, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true, shiftKey: true});
+
+  if (!checkContent("\u732B\u5A18 mean",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(7, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true, shiftKey: true});
+
+  if (!checkContent("\u732B\u5A18 means \"cat-girl\". She is a ",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(30, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true, shiftKey: true});
+
+  if (!checkContent("\u732B\u5A18 means \"cat-girl\". She is a \u5996\u602A",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(32, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true, shiftKey: true});
+
+  if (!checkContent("\u732B\u5A18 means \"cat-girl\".",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(20, "", "runUndoRedoTest", "#" + i)) {
+    return;
+  }
+
+  synthesizeKey("Z", {accelKey: true, shiftKey: true});
+
+  if (!checkContent("\u732B\u5A18 means \"cat-girl\".",
+                    "runUndoRedoTest", "#" + ++i) ||
+      !checkSelection(20, "", "runUndoRedoTest", "#" + i)) {
+    // eslint-disable-next-line no-useless-return
+    return;
+  }
+}
+
+function checkInputEvent(aEvent, aIsComposing, aInputType, aData, aTargetRanges, aDescription) {
+  if (aEvent.type !== "input" && aEvent.type !== "beforeinput") {
+    throw new Error(`${aDescription}: "${aEvent.type}" is not InputEvent`);
+  }
+  ok(aEvent instanceof InputEvent, `"${aEvent.type}" event should be dispatched with InputEvent interface: ${aDescription}`);
+  let cancelable = aEvent.type === "beforeinput" &&
+                   aInputType !== "insertCompositionText" &&
+                   aInputType !== "deleteCompositionText";
+  is(aEvent.cancelable, cancelable, `"${aEvent.type}" event should ${cancelable ? "be" : "be never"} cancelable: ${aDescription}`);
+  is(aEvent.bubbles, true, `"${aEvent.type}" event should always bubble: ${aDescription}`);
+  is(aEvent.isComposing, aIsComposing, `isComposing of "${aEvent.type}" event should be ${aIsComposing}: ${aDescription}`);
+  is(aEvent.inputType, aInputType, `inputType of "${aEvent.type}" event should be "${aInputType}": ${aDescription}`);
+  is(aEvent.data, aData, `data of "${aEvent.type}" event should be ${aData}: ${aDescription}`);
+  is(aEvent.dataTransfer, null, `dataTransfer of "${aEvent.type}" event should be null: ${aDescription}`);
+  let targetRanges = aEvent.getTargetRanges();
+  if (aTargetRanges.length === 0) {
+    is(targetRanges.length, 0,
+       `getTargetRange() of "${aEvent.type}" event should return empty array: ${aDescription}`);
+  } else {
+    is(targetRanges.length, aTargetRanges.length,
+       `getTargetRange() of "${aEvent.type}" event should return static range array: ${aDescription}`);
+    if (targetRanges.length == aTargetRanges.length) {
+      for (let i = 0; i < targetRanges.length; i++) {
+        is(targetRanges[i].startContainer, aTargetRanges[i].startContainer,
+           `startContainer of getTargetRanges()[${i}] of "${aEvent.type}" event does not match: ${aDescription}`);
+        is(targetRanges[i].startOffset, aTargetRanges[i].startOffset,
+           `startOffset of getTargetRanges()[${i}] of "${aEvent.type}" event does not match: ${aDescription}`);
+        is(targetRanges[i].endContainer, aTargetRanges[i].endContainer,
+           `endContainer of getTargetRanges()[${i}] of "${aEvent.type}" event does not match: ${aDescription}`);
+        is(targetRanges[i].endOffset, aTargetRanges[i].endOffset,
+           `endOffset of getTargetRanges()[${i}] of "${aEvent.type}" event does not match: ${aDescription}`);
+      }
+    }
+  }
+}
+
+function runCompositionCommitAsIsTest()
+{
+  textarea.focus();
+
+  let result = [];
+  function clearResult()
+  {
+    result = [];
+  }
+
+  function handler(aEvent)
+  {
+    result.push(aEvent);
+  }
+
+  textarea.addEventListener("compositionupdate", handler, true);
+  textarea.addEventListener("compositionend", handler, true);
+  textarea.addEventListener("beforeinput", handler, true);
+  textarea.addEventListener("input", handler, true);
+  textarea.addEventListener("text", handler, true);
+
+  // compositioncommitasis with composing string.
+  textarea.value = "";
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "a" },
+    });
+  is(textarea.value, "\u3042", "runCompositionCommitAsIsTest: textarea doesn't have composition string #1");
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "Enter" } });
+
+  is(result.length, 4,
+     "runCompositionCommitAsIsTest: 4 events should be fired after dispatching compositioncommitasis #1");
+  is(result[0].type, "text",
+     "runCompositionCommitAsIsTest: text should be fired after dispatching compositioncommitasis because it's dispatched when there is composing string #1");
+  is(result[1].type, "beforeinput",
+     "runCompositionCommitAsIsTest: beforeinput should be fired after dispatching compositioncommitasis because it's dispatched when there is composing string #1");
+  checkInputEvent(result[1], true, "insertCompositionText", "\u3042", [],
+                  "runCompositionCommitAsIsTest: after dispatching compositioncommitasis #1");
+  is(result[2].type, "compositionend",
+     "runCompositionCommitAsIsTest: compositionend should be fired after dispatching compositioncommitasis #1");
+  is(result[3].type, "input",
+     "runCompositionCommitAsIsTest: input should be fired after dispatching compositioncommitasis #1");
+  checkInputEvent(result[3], false, "insertCompositionText", "\u3042", [],
+                  "runCompositionCommitAsIsTest: after dispatching compositioncommitasis #1");
+  is(textarea.value, "\u3042", "runCompositionCommitAsIsTest: textarea doesn't have committed string #1");
+
+  // compositioncommitasis with committed string.
+  textarea.value = "";
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "a" },
+    });
+  is(textarea.value, "\u3042", "runCompositionCommitAsIsTest: textarea doesn't have composition string #2");
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 0, "attr": 0 }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "KEY_Enter", type: "keydown" },
+    });
+  is(textarea.value, "\u3042", "runCompositionCommitAsIsTest: textarea doesn't have committed string #2");
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter", type: "keyup" } });
+
+  is(result.length, 2,
+     "runCompositionCommitAsIsTest: 2 events should be fired after dispatching compositioncommitasis #2");
+  // XXX Do we need a "beforeinput" event here? Not sure.
+  is(result[0].type, "compositionend",
+     "runCompositionCommitAsIsTest: compositionend should be fired after dispatching compositioncommitasis #2");
+  is(result[1].type, "input",
+     "runCompositionCommitAsIsTest: input should be fired after dispatching compositioncommitasis #2");
+  checkInputEvent(result[1], false, "insertCompositionText", "\u3042", [],
+                  "runCompositionCommitAsIsTest: after dispatching compositioncommitasis #2");
+  is(textarea.value, "\u3042", "runCompositionCommitAsIsTest: textarea doesn't have committed string #2");
+
+  // compositioncommitasis with committed string.
+  textarea.value = "";
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "a" },
+    });
+  is(textarea.value, "\u3042", "runCompositionCommitAsIsTest: textarea doesn't have composition string #3");
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "",
+        "clauses":
+        [
+          { "length": 0, "attr": 0 }
+        ]
+      },
+      "caret": { "start": 0, "length": 0 },
+      "key": { key: "KEY_Escape", type: "keydown" },
+    });
+  is(textarea.value, "", "runCompositionCommitAsIsTest: textarea has non-empty composition string #3");
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Escape", type: "keyup" } });
+
+  is(result.length, 2,
+     "runCompositionCommitAsIsTest: 2 events should be fired after dispatching compositioncommitasis #3");
+  // XXX Do we need a "beforeinput" event here? Not sure.
+  is(result[0].type, "compositionend",
+     "runCompositionCommitAsIsTest: compositionend shouldn't be fired after dispatching compositioncommitasis #3");
+  is(result[1].type, "input",
+     "runCompositionCommitAsIsTest: input should be fired after dispatching compositioncommitasis #3");
+  checkInputEvent(result[1], false, "insertCompositionText", "", [],
+                  "runCompositionCommitAsIsTest: after dispatching compositioncommitasis #3");
+  is(textarea.value, "", "runCompositionCommitAsIsTest: textarea doesn't have committed string #3");
+
+  textarea.removeEventListener("compositionupdate", handler, true);
+  textarea.removeEventListener("compositionend", handler, true);
+  textarea.removeEventListener("beforeinput", handler, true);
+  textarea.removeEventListener("input", handler, true);
+  textarea.removeEventListener("text", handler, true);
+}
+
+function runCompositionCommitTest()
+{
+  textarea.focus();
+
+  let result = [];
+  function clearResult()
+  {
+    result = [];
+  }
+
+  function handler(aEvent)
+  {
+    result.push(aEvent);
+  }
+
+  textarea.addEventListener("compositionupdate", handler, true);
+  textarea.addEventListener("compositionend", handler, true);
+  textarea.addEventListener("beforeinput", handler, true);
+  textarea.addEventListener("input", handler, true);
+  textarea.addEventListener("text", handler, true);
+
+  // compositioncommit with different composing string.
+  textarea.value = "";
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "a", type: "keydown" },
+    });
+  is(textarea.value, "\u3042", "runCompositionCommitTest: textarea doesn't have composition string #1");
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommit", data: "\u3043", key: { key: "a", type: "keyup" } });
+
+  is(result.length, 5,
+     "runCompositionCommitTest: 5 events should be fired after dispatching compositioncommit #1");
+  is(result[0].type, "compositionupdate",
+     "runCompositionCommitTest: compositionupdate should be fired after dispatching compositioncommit because it's dispatched when there is composing string #1");
+  is(result[1].type, "text",
+     "runCompositionCommitTest: text should be fired after dispatching compositioncommit #1");
+  is(result[2].type, "beforeinput",
+     "runCompositionCommitTest: beforeinput should be fired after dispatching compositioncommit because it's dispatched when there is composing string #1");
+  checkInputEvent(result[2], true, "insertCompositionText", "\u3043", [],
+                  "runCompositionCommitTest: after dispatching compositioncommit #1");
+  is(result[3].type, "compositionend",
+     "runCompositionCommitTest: compositionend should be fired after dispatching compositioncommit #1");
+  is(result[4].type, "input",
+     "runCompositionCommitTest: input should be fired after dispatching compositioncommit #1");
+  checkInputEvent(result[4], false, "insertCompositionText", "\u3043", [],
+                  "runCompositionCommitTest: after dispatching compositioncommit #1");
+  is(textarea.value, "\u3043", "runCompositionCommitTest: textarea doesn't have committed string #1");
+
+  // compositioncommit with different committed string when there is already committed string
+  textarea.value = "";
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "a" },
+    });
+  is(textarea.value, "\u3042", "runCompositionCommitTest: textarea doesn't have composition string #2");
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 0, "attr": 0 }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "KEY_Enter", type: "keydown" },
+    });
+  is(textarea.value, "\u3042", "runCompositionCommitTest: textarea doesn't have committed string #2");
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommit", data: "\u3043", key: { key: "KEY_Enter", type: "keyup" } });
+
+  is(result.length, 5,
+     "runCompositionCommitTest: 5 events should be fired after dispatching compositioncommit #2");
+  is(result[0].type, "compositionupdate",
+     "runCompositionCommitTest: compositionupdate should be fired after dispatching compositioncommit #2");
+  is(result[1].type, "text",
+     "runCompositionCommitTest: text should be fired after dispatching compositioncommit #2");
+  is(result[2].type, "beforeinput",
+     "runCompositionCommitTest: beforeinput should be fired after dispatching compositioncommit #2");
+  checkInputEvent(result[2], true, "insertCompositionText", "\u3043", [],
+                  "runCompositionCommitTest: after dispatching compositioncommit #2");
+  is(result[3].type, "compositionend",
+     "runCompositionCommitTest: compositionend should be fired after dispatching compositioncommit #2");
+  is(result[4].type, "input",
+     "runCompositionCommitTest: input should be fired after dispatching compositioncommit #2");
+  checkInputEvent(result[4], false, "insertCompositionText", "\u3043", [],
+                  "runCompositionCommitTest: after dispatching compositioncommit #2");
+  is(textarea.value, "\u3043", "runCompositionCommitTest: textarea doesn't have committed string #2");
+
+  // compositioncommit with empty composition string.
+  textarea.value = "";
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "a" },
+    });
+  is(textarea.value, "\u3042", "runCompositionCommitTest: textarea doesn't have composition string #3");
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "",
+        "clauses":
+        [
+          { "length": 0, "attr": 0 }
+        ]
+      },
+      "caret": { "start": 0, "length": 0 },
+      "key": { key: "KEY_Enter", type: "keydown" },
+    });
+  is(textarea.value, "", "runCompositionCommitTest: textarea has non-empty composition string #3");
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommit", data: "\u3043", key: { key: "KEY_Enter", type: "keyup" } });
+
+  is(result.length, 5,
+     "runCompositionCommitTest: 5 events should be fired after dispatching compositioncommit #3");
+  is(result[0].type, "compositionupdate",
+     "runCompositionCommitTest: compositionupdate should be fired after dispatching compositioncommit #3");
+  is(result[1].type, "text",
+     "runCompositionCommitTest: text should be fired after dispatching compositioncommit #3");
+  is(result[2].type, "beforeinput",
+     "runCompositionCommitTest: beforeinput should be fired after dispatching compositioncommit #3");
+  checkInputEvent(result[2], true, "insertCompositionText", "\u3043", [],
+                  "runCompositionCommitTest: after dispatching compositioncommit #3");
+  is(result[3].type, "compositionend",
+     "runCompositionCommitTest: compositionend should be fired after dispatching compositioncommit #3");
+  is(result[4].type, "input",
+     "runCompositionCommitTest: input should be fired after dispatching compositioncommit #3");
+  checkInputEvent(result[4], false, "insertCompositionText", "\u3043", [],
+                  "runCompositionCommitTest: after dispatching compositioncommit #3");
+  is(textarea.value, "\u3043", "runCompositionCommitTest: textarea doesn't have committed string #3");
+
+  // inserting empty string with simple composition.
+  textarea.value = "abc";
+  textarea.setSelectionRange(3, 3);
+  synthesizeComposition({ type: "compositionstart" });
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommit", data: "" });
+
+  is(result.length, 4,
+     "runCompositionCommitTest: 4 events should be fired when inserting empty string with composition");
+  is(result[0].type, "text",
+     "runCompositionCommitTest: text should be fired when inserting empty string with composition");
+  is(result[1].type, "beforeinput",
+     "runCompositionCommitTest: beforeinput should be fired when inserting empty string with composition");
+  checkInputEvent(result[1], true, "insertCompositionText", "", [],
+                  "runCompositionCommitTest: when inserting empty string with composition");
+  is(result[2].type, "compositionend",
+     "runCompositionCommitTest: compositionend should be fired when inserting empty string with composition");
+  is(result[3].type, "input",
+     "runCompositionCommitTest: input should be fired when inserting empty string with composition");
+  checkInputEvent(result[3], false, "insertCompositionText", "", [],
+                  "runCompositionCommitTest: when inserting empty string with composition");
+  is(textarea.value, "abc",
+     "runCompositionCommitTest: textarea should keep original value when inserting empty string with composition");
+
+  // replacing selection with empty string with simple composition.
+  textarea.value = "abc";
+  textarea.setSelectionRange(0, 3);
+  synthesizeComposition({ type: "compositionstart" });
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommit", data: "" });
+
+  is(result.length, 4,
+     "runCompositionCommitTest: 4 events should be fired when replacing with empty string with composition");
+  is(result[0].type, "text",
+     "runCompositionCommitTest: text should be fired when replacing with empty string with composition");
+  is(result[1].type, "beforeinput",
+     "runCompositionCommitTest: beforeinput should be fired when replacing with empty string with composition");
+  checkInputEvent(result[1], true, "insertCompositionText", "", [],
+                  "runCompositionCommitTest: when replacing with empty string with composition");
+  is(result[2].type, "compositionend",
+     "runCompositionCommitTest: compositionend should be fired when replacing with empty string with composition");
+  is(result[3].type, "input",
+     "runCompositionCommitTest: input should be fired when replacing with empty string with composition");
+  checkInputEvent(result[3], false, "insertCompositionText", "", [],
+                  "runCompositionCommitTest: when replacing with empty string with composition");
+  is(textarea.value, "",
+     "runCompositionCommitTest: textarea should become empty when replacing selection with empty string with composition");
+
+  // replacing selection with same string with simple composition.
+  textarea.value = "abc";
+  textarea.setSelectionRange(0, 3);
+  synthesizeComposition({ type: "compositionstart" });
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommit", data: "abc" });
+
+  is(result.length, 5,
+     "runCompositionCommitTest: 5 events should be fired when replacing selection with same string with composition");
+  is(result[0].type, "compositionupdate",
+     "runCompositionCommitTest: compositionupdate should be fired when replacing selection with same string with composition");
+  is(result[1].type, "text",
+     "runCompositionCommitTest: text should be fired when replacing selection with same string with composition");
+  is(result[2].type, "beforeinput",
+     "runCompositionCommitTest: beforeinput should be fired when replacing selection with same string with composition");
+  checkInputEvent(result[2], true, "insertCompositionText", "abc", [],
+                  "runCompositionCommitTest: when replacing selection with same string with composition");
+  is(result[3].type, "compositionend",
+     "runCompositionCommitTest: compositionend should be fired when replacing selection with same string with composition");
+  is(result[4].type, "input",
+     "runCompositionCommitTest: input should be fired when replacing selection with same string with composition");
+  checkInputEvent(result[4], false, "insertCompositionText", "abc", [],
+                  "runCompositionCommitTest: when replacing selection with same string with composition");
+  is(textarea.value, "abc",
+     "runCompositionCommitTest: textarea should keep same value when replacing selection with same string with composition");
+
+  // compositioncommit with non-empty composition string.
+  textarea.value = "";
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "a" },
+    });
+  is(textarea.value, "\u3042", "runCompositionCommitTest: textarea doesn't have composition string #4");
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommit", data: "", key: { key: "KEY_Enter" } });
+
+  is(result.length, 5,
+     "runCompositionCommitTest: 5 events should be fired after dispatching compositioncommit #4");
+  is(result[0].type, "compositionupdate",
+     "runCompositionCommitTest: compositionupdate should be fired after dispatching compositioncommit #4");
+  is(result[1].type, "text",
+     "runCompositionCommitTest: text should be fired after dispatching compositioncommit #4");
+  is(result[2].type, "beforeinput",
+     "runCompositionCommitTest: beforeinput should be fired after dispatching compositioncommit #4");
+  checkInputEvent(result[2], true, "insertCompositionText", "", [],
+                  "runCompositionCommitTest: after dispatching compositioncommit #4");
+  is(result[3].type, "compositionend",
+     "runCompositionCommitTest: compositionend should be fired after dispatching compositioncommit #4");
+  is(result[4].type, "input",
+     "runCompositionCommitTest: input should be fired after dispatching compositioncommit #4");
+  checkInputEvent(result[4], false, "insertCompositionText", "", [],
+                  "runCompositionCommitTest: after dispatching compositioncommit #4");
+  is(textarea.value, "", "runCompositionCommitTest: textarea should be empty #4");
+
+  // compositioncommit immediately without compositionstart
+  textarea.value = "";
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommit", data: "\u3042", key: { key: "a" } });
+
+  is(result.length, 5,
+     "runCompositionCommitTest: 5 events should be fired after dispatching compositioncommit #5");
+  is(result[0].type, "compositionupdate",
+     "runCompositionCommitTest: compositionupdate should be fired after dispatching compositioncommit #5");
+  is(result[1].type, "text",
+     "runCompositionCommitTest: text should be fired after dispatching compositioncommit #5");
+  is(result[2].type, "beforeinput",
+     "runCompositionCommitTest: beforeinput should be fired after dispatching compositioncommit #5");
+  checkInputEvent(result[2], true, "insertCompositionText", "\u3042", [],
+                  "runCompositionCommitTest: after dispatching compositioncommit #5");
+  is(result[3].type, "compositionend",
+     "runCompositionCommitTest: compositionend should be fired after dispatching compositioncommit #5");
+  is(result[4].type, "input",
+     "runCompositionCommitTest: input should be fired after dispatching compositioncommit #5");
+  checkInputEvent(result[4], false, "insertCompositionText", "\u3042", [],
+                  "runCompositionCommitTest: after dispatching compositioncommit #5");
+  is(textarea.value, "\u3042", "runCompositionCommitTest: textarea should be empty #5");
+
+  // compositioncommit with same composition string.
+  textarea.value = "";
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "a" },
+    });
+  is(textarea.value, "\u3042", "runCompositionCommitTest: textarea doesn't have composition string #5");
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommit", data: "\u3042", key: { key: "KEY_Enter" } });
+
+  is(result.length, 4,
+     "runCompositionCommitTest: 4 events should be fired after dispatching compositioncommit #6");
+  is(result[0].type, "text",
+     "runCompositionCommitTest: text should be fired after dispatching compositioncommit #6");
+  is(result[1].type, "beforeinput",
+     "runCompositionCommitTest: beforeinput should be fired after dispatching compositioncommit #6");
+  checkInputEvent(result[1], true, "insertCompositionText", "\u3042", [],
+                  "runCompositionCommitTest: after dispatching compositioncommit #6");
+  is(result[2].type, "compositionend",
+     "runCompositionCommitTest: compositionend should be fired after dispatching compositioncommit #6");
+  is(result[3].type, "input",
+     "runCompositionCommitTest: input should be fired after dispatching compositioncommit #6");
+  checkInputEvent(result[3], false, "insertCompositionText", "\u3042", [],
+                  "runCompositionCommitTest: after dispatching compositioncommit #6");
+  is(textarea.value, "\u3042", "runCompositionCommitTest: textarea should have committed string #6");
+
+  // compositioncommit with same composition string when there is committed string
+  textarea.value = "";
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "a" },
+    });
+  is(textarea.value, "\u3042", "runCompositionCommitTest: textarea doesn't have composition string #6");
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 0, "attr": 0 }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "KEY_Enter", type: "keydown" },
+    });
+  is(textarea.value, "\u3042", "runCompositionCommitTest: textarea doesn't have composition string #6");
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommit", data: "\u3042", key: { key: "KEY_Enter", type: "keyup" } });
+
+  is(result.length, 2,
+     "runCompositionCommitTest: 2 events should be fired after dispatching compositioncommit #7");
+  // XXX Do we need a "beforeinput" event here? Not sure.
+  is(result[0].type, "compositionend",
+     "runCompositionCommitTest: compositionend should be fired after dispatching compositioncommit #7");
+  is(result[1].type, "input",
+     "runCompositionCommitTest: input should be fired after dispatching compositioncommit #7");
+  checkInputEvent(result[1], false, "insertCompositionText", "\u3042", [],
+                  "runCompositionCommitTest: after dispatching compositioncommit #7");
+  is(textarea.value, "\u3042", "runCompositionCommitTest: textarea should have committed string #6");
+
+  textarea.removeEventListener("compositionupdate", handler, true);
+  textarea.removeEventListener("compositionend", handler, true);
+  textarea.removeEventListener("beforeinput", handler, true);
+  textarea.removeEventListener("input", handler, true);
+  textarea.removeEventListener("text", handler, true);
+}
+
+// eslint-disable-next-line complexity
+function runCompositionTest()
+{
+  textarea.value = "";
+  textarea.focus();
+  let caretRects = [];
+
+  let caretRect = synthesizeQueryCaretRect(0);
+  if (!checkQueryContentResult(caretRect,
+        "runCompositionTest: synthesizeQueryCaretRect #0")) {
+    return;
+  }
+  caretRects[0] = caretRect;
+
+  // input first character
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "o" },
+    });
+
+  if (!checkContent("\u3089", "runCompositionTest", "#1-1") ||
+      !checkSelection(1, "", "runCompositionTest", "#1-1")) {
+    return;
+  }
+
+  caretRect = synthesizeQueryCaretRect(1);
+  if (!checkQueryContentResult(caretRect,
+        "runCompositionTest: synthesizeQueryCaretRect #1-1")) {
+    return;
+  }
+  caretRects[1] = caretRect;
+
+  // input second character
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC",
+        "clauses":
+        [
+          { "length": 2, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 },
+      "key": { key: "\\", code: "IntlYen", keyCode: KeyboardEvent.DOM_VK_BACKSLASH },
+    });
+
+  if (!checkContent("\u3089\u30FC", "runCompositionTest", "#1-2") ||
+      !checkSelection(2, "", "runCompositionTest", "#1-2")) {
+    return;
+  }
+
+  caretRect = synthesizeQueryCaretRect(2);
+  if (!checkQueryContentResult(caretRect,
+        "runCompositionTest: synthesizeQueryCaretRect #1-2")) {
+    return;
+  }
+  caretRects[2] = caretRect;
+
+  isnot(caretRects[2].left, caretRects[1].left,
+        "runCompositionTest: caret isn't moved (#1-2)");
+  is(caretRects[2].top, caretRects[1].top,
+     "runCompositionTest: caret is moved to another line (#1-2)");
+  is(caretRects[2].width, caretRects[1].width,
+     "runCompositionTest: caret width is wrong (#1-2)");
+  is(caretRects[2].height, caretRects[1].height,
+     "runCompositionTest: caret width is wrong (#1-2)");
+
+  // input third character
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081",
+        "clauses":
+        [
+          { "length": 3, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 3, "length": 0 },
+      "key": { key: "/" },
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081", "runCompositionTest", "#1-3") ||
+      !checkSelection(3, "", "runCompositionTest", "#1-3")) {
+    return;
+  }
+
+  caretRect = synthesizeQueryCaretRect(3);
+  if (!checkQueryContentResult(caretRect,
+        "runCompositionTest: synthesizeQueryCaretRect #1-3")) {
+    return;
+  }
+  caretRects[3] = caretRect;
+
+  isnot(caretRects[3].left, caretRects[2].left,
+        "runCompositionTest: caret isn't moved (#1-3)");
+  is(caretRects[3].top, caretRects[2].top,
+     "runCompositionTest: caret is moved to another line (#1-3)");
+  is(caretRects[3].width, caretRects[2].width,
+     "runCompositionTest: caret width is wrong (#1-3)");
+  is(caretRects[3].height, caretRects[2].height,
+     "runCompositionTest: caret height is wrong (#1-3)");
+
+  // moves the caret left
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081",
+        "clauses":
+        [
+          { "length": 3, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 },
+      "key": { key: "KEY_ArrowLeft" },
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081", "runCompositionTest", "#1-3-1") ||
+      !checkSelection(2, "", "runCompositionTest", "#1-3-1")) {
+    return;
+  }
+
+
+  caretRect = synthesizeQueryCaretRect(2);
+  if (!checkQueryContentResult(caretRect,
+        "runCompositionTest: synthesizeQueryCaretRect #1-3-1")) {
+    return;
+  }
+
+  is(caretRect.left, caretRects[2].left,
+     "runCompositionTest: caret rects are different (#1-3-1, left)");
+  is(caretRect.top, caretRects[2].top,
+     "runCompositionTest: caret rects are different (#1-3-1, top)");
+  // by bug 335359, the caret width depends on the right side's character.
+  is(caretRect.width, caretRects[2].width + Math.round(window.devicePixelRatio),
+     "runCompositionTest: caret rects are different (#1-3-1, width)");
+  is(caretRect.height, caretRects[2].height,
+     "runCompositionTest: caret rects are different (#1-3-1, height)");
+
+  // moves the caret left
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081",
+        "clauses":
+        [
+          { "length": 3, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "KEY_ArrowLeft" },
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081", "runCompositionTest", "#1-3-2") ||
+      !checkSelection(1, "", "runCompositionTest", "#1-3-2")) {
+    return;
+  }
+
+
+  caretRect = synthesizeQueryCaretRect(1);
+  if (!checkQueryContentResult(caretRect,
+        "runCompositionTest: synthesizeQueryCaretRect #1-3-2")) {
+    return;
+  }
+
+  is(caretRect.left, caretRects[1].left,
+     "runCompositionTest: caret rects are different (#1-3-2, left)");
+  is(caretRect.top, caretRects[1].top,
+     "runCompositionTest: caret rects are different (#1-3-2, top)");
+  // by bug 335359, the caret width depends on the right side's character.
+  is(caretRect.width, caretRects[1].width + Math.round(window.devicePixelRatio),
+     "runCompositionTest: caret rects are different (#1-3-2, width)");
+  is(caretRect.height, caretRects[1].height,
+     "runCompositionTest: caret rects are different (#1-3-2, height)");
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081\u3093",
+        "clauses":
+        [
+          { "length": 4, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 4, "length": 0 },
+      "key": { key: "y" },
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081\u3093", "runCompositionTest", "#1-4") ||
+      !checkSelection(4, "", "runCompositionTest", "#1-4")) {
+    return;
+  }
+
+
+  // backspace
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081",
+        "clauses":
+        [
+          { "length": 3, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 3, "length": 0 },
+      "key": { key: "KEY_Backspace" },
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081", "runCompositionTest", "#1-5") ||
+      !checkSelection(3, "", "runCompositionTest", "#1-5")) {
+    return;
+  }
+
+  // re-input
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081\u3093",
+        "clauses":
+        [
+          { "length": 4, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 4, "length": 0 },
+      "key": { key: "y" },
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081\u3093", "runCompositionTest", "#1-6") ||
+      !checkSelection(4, "", "runCompositionTest", "#1-6")) {
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081\u3093\u3055",
+        "clauses":
+        [
+          { "length": 5, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 5, "length": 0 },
+      "key": { key: "x" },
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081\u3093\u3055", "runCompositionTest", "#1-7") ||
+      !checkSelection(5, "", "runCompositionTest", "#1-7")) {
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081\u3093\u3055\u3044",
+        "clauses":
+        [
+          { "length": 6, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 6, "length": 0 },
+      "key": { key: "e" },
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081\u3093\u3055\u3044", "runCompositionTest", "#1-8") ||
+      !checkSelection(6, "", "runCompositionTest", "#1-8")) {
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081\u3093\u3055\u3044\u3053",
+        "clauses":
+        [
+          { "length": 7, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 7, "length": 0 },
+      "key": { key: "b" },
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081\u3093\u3055\u3044\u3053", "runCompositionTest", "#1-8") ||
+      !checkSelection(7, "", "runCompositionTest", "#1-8")) {
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081\u3093\u3055\u3044\u3053\u3046",
+        "clauses":
+        [
+          { "length": 8, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 8, "length": 0 },
+      "key": { key: "4" },
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081\u3093\u3055\u3044\u3053\u3046",
+                    "runCompositionTest", "#1-9") ||
+      !checkSelection(8, "", "runCompositionTest", "#1-9")) {
+    return;
+  }
+
+  // convert
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u30E9\u30FC\u30E1\u30F3\u6700\u9AD8",
+        "clauses":
+        [
+          { "length": 4,
+            "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+          { "length": 2,
+            "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 4, "length": 0 },
+      "key": { key: " " },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u6700\u9AD8",
+                    "runCompositionTest", "#1-10") ||
+      !checkSelection(4, "", "runCompositionTest", "#1-10")) {
+    return;
+  }
+
+  // change the selected clause
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u30E9\u30FC\u30E1\u30F3\u6700\u9AD8",
+        "clauses":
+        [
+          { "length": 4,
+            "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE },
+          { "length": 2,
+            "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 6, "length": 0 },
+      "key": { key: "KEY_ArrowLeft", shiftKey: true },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u6700\u9AD8",
+                    "runCompositionTest", "#1-11") ||
+      !checkSelection(6, "", "runCompositionTest", "#1-11")) {
+    return;
+  }
+
+  // reset clauses
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u30E9\u30FC\u30E1\u30F3\u3055\u884C\u3053\u3046",
+        "clauses":
+        [
+          { "length": 5,
+            "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+          { "length": 3,
+            "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 5, "length": 0 },
+      "key": { key: "KEY_ArrowRight" },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u3055\u884C\u3053\u3046",
+                    "runCompositionTest", "#1-12") ||
+      !checkSelection(5, "", "runCompositionTest", "#1-12")) {
+    return;
+  }
+
+
+  let textRect1 = synthesizeQueryTextRect(0, 1);
+  let textRect2 = synthesizeQueryTextRect(1, 1);
+  if (!checkQueryContentResult(textRect1,
+        "runCompositionTest: synthesizeQueryTextRect #1-12-1") ||
+      !checkQueryContentResult(textRect2,
+        "runCompositionTest: synthesizeQueryTextRect #1-12-2")) {
+    return;
+  }
+
+  // commit the composition string
+  synthesizeComposition({ type: "compositioncommitasis" });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u3055\u884C\u3053\u3046",
+                    "runCompositionTest", "#1-13") ||
+      !checkSelection(8, "", "runCompositionTest", "#1-13")) {
+    return;
+  }
+
+  let textRect3 = synthesizeQueryTextRect(0, 1);
+  let textRect4 = synthesizeQueryTextRect(1, 1);
+
+  if (!checkQueryContentResult(textRect3,
+        "runCompositionTest: synthesizeQueryTextRect #1-13-1") ||
+      !checkQueryContentResult(textRect4,
+        "runCompositionTest: synthesizeQueryTextRect #1-13-2")) {
+    return;
+  }
+
+  checkRect(textRect3, textRect1, "runCompositionTest: textRect #1-13-1");
+  checkRect(textRect4, textRect2, "runCompositionTest: textRect #1-13-2");
+
+  // restart composition and input characters
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3057",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "d" },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u3055\u884C\u3053\u3046\u3057",
+                    "runCompositionTest", "#2-1") ||
+      !checkSelection(8 + 1, "", "runCompositionTest", "#2-1")) {
+    return;
+  }
+
+  let textRect3QueriedWithRelativeOffset = synthesizeQueryTextRect(-8, 1, true);
+  let textRect4QueriedWithRelativeOffset = synthesizeQueryTextRect(-8 + 1, 1, true);
+  checkRect(textRect3QueriedWithRelativeOffset, textRect3, "runCompositionTest: textRect #2-1-2");
+  checkRect(textRect4QueriedWithRelativeOffset, textRect4, "runCompositionTest: textRect #2-1-3");
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3058",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "r" },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u3055\u884C\u3053\u3046\u3058",
+                    "runCompositionTest", "#2-2") ||
+      !checkSelection(8 + 1, "", "runCompositionTest", "#2-2")) {
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3058\u3087",
+        "clauses":
+        [
+          { "length": 2, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 },
+      "key": { key: ")", code: "Digit9", keyCode: KeyboardEvent.DOM_VK_9, shiftKey: true },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u3055\u884C\u3053\u3046\u3058\u3087",
+                    "runCompositionTest", "#2-3") ||
+      !checkSelection(8 + 2, "", "runCompositionTest", "#2-3")) {
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3058\u3087\u3046",
+        "clauses":
+        [
+          { "length": 3, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 3, "length": 0 },
+      "key": { key: "4" },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u3055\u884C\u3053\u3046\u3058\u3087\u3046",
+                    "runCompositionTest", "#2-4") ||
+      !checkSelection(8 + 3, "", "runCompositionTest", "#2-4")) {
+    return;
+  }
+
+  // commit the composition string
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter" } });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u3055\u884C\u3053\u3046\u3058\u3087\u3046",
+                    "runCompositionTest", "#2-4") ||
+      !checkSelection(8 + 3, "", "runCompositionTest", "#2-4")) {
+    return;
+  }
+
+  // set selection
+  let selectionSetTest = synthesizeSelectionSet(4, 7, false);
+  ok(selectionSetTest, "runCompositionTest: selectionSetTest failed");
+
+  if (!checkSelection(4, "\u3055\u884C\u3053\u3046\u3058\u3087\u3046", "runCompositionTest", "#3-1")) {
+    return;
+  }
+
+  // start composition with selection
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u304A",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "6" },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u304A",
+                    "runCompositionTest", "#3-2") ||
+      !checkSelection(4 + 1, "", "runCompositionTest", "#3-2")) {
+    return;
+  }
+
+  // remove the composition string
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "",
+        "clauses":
+        [
+          { "length": 0, "attr": 0 }
+        ]
+      },
+      "caret": { "start": 0, "length": 0 },
+      "key": { key: "KEY_Backspace" },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3",
+                    "runCompositionTest", "#3-3") ||
+      !checkSelection(4, "", "runCompositionTest", "#3-3")) {
+    return;
+  }
+
+  // re-input the composition string
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3046",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "4" },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u3046",
+                    "runCompositionTest", "#3-4") ||
+      !checkSelection(4 + 1, "", "runCompositionTest", "#3-4")) {
+    return;
+  }
+
+  // cancel the composition
+  synthesizeComposition({ type: "compositioncommit", data: "", key: { key: "KEY_Escape" } });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3",
+                    "runCompositionTest", "#3-5") ||
+      !checkSelection(4, "", "runCompositionTest", "#3-5")) {
+    return;
+  }
+
+  // bug 271815, some Chinese IMEs for Linux make empty composition string
+  // and compty clause information when it lists up Chinese characters on
+  // its candidate window.
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "",
+        "clauses":
+        [
+          { "length": 0, "attr": 0 }
+        ]
+      },
+      "caret": { "start": 0, "length": 0 },
+      "key": { key: "a" },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3",
+                    "runCompositionTest", "#4-1") ||
+      !checkSelection(4, "", "runCompositionTest", "#4-1")) {
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "",
+        "clauses":
+        [
+          { "length": 0, "attr": 0 }
+        ]
+      },
+      "caret": { "start": 0, "length": 0 },
+      "key": { key: "b" },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3",
+                    "runCompositionTest", "#4-2") ||
+      !checkSelection(4, "", "runCompositionTest", "#4-2")) {
+    return;
+  }
+
+  synthesizeComposition({ type: "compositioncommit", data: "\u6700", key: { key: "KEY_Enter" } });
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u6700",
+                    "runCompositionTest", "#4-3") ||
+      !checkSelection(5, "", "runCompositionTest", "#4-3")) {
+    return;
+  }
+
+  // testing the canceling case
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "",
+        "clauses":
+        [
+          { "length": 0, "attr": 0 }
+        ]
+      },
+      "caret": { "start": 0, "length": 0 },
+      "key": { key: "a" },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u6700",
+                    "runCompositionTest", "#4-5") ||
+      !checkSelection(5, "", "runCompositionTest", "#4-5")) {
+    return;
+  }
+
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Escape" } });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u6700",
+                    "runCompositionTest", "#4-6") ||
+      !checkSelection(5, "", "runCompositionTest", "#4-6")) {
+    return;
+  }
+
+  // testing whether the empty composition string deletes selected string.
+  synthesizeKey("KEY_ArrowLeft", {shiftKey: true});
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "",
+        "clauses":
+        [
+          { "length": 0, "attr": 0 }
+        ]
+      },
+      "caret": { "start": 0, "length": 0 },
+      "key": { key: "a" },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3",
+                    "runCompositionTest", "#4-8") ||
+      !checkSelection(4, "", "runCompositionTest", "#4-8")) {
+    return;
+  }
+
+  synthesizeComposition({ type: "compositioncommit", data: "\u9AD8", key: { key: "KEY_Enter" } });
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u9AD8",
+                    "runCompositionTest", "#4-9") ||
+      !checkSelection(5, "", "runCompositionTest", "#4-9")) {
+    return;
+  }
+
+  synthesizeKey("KEY_Backspace");
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3",
+                    "runCompositionTest", "#4-11") ||
+      !checkSelection(4, "", "runCompositionTest", "#4-11")) {
+    return;
+  }
+
+  // bug 23558, ancient Japanese IMEs on Window may send empty text event
+  // twice at canceling composition.
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u6700",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "a" },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u6700",
+                    "runCompositionTest", "#5-1") ||
+      !checkSelection(4 + 1, "", "runCompositionTest", "#5-1")) {
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "",
+        "clauses":
+        [
+          { "length": 0, "attr": 0 }
+        ]
+      },
+      "caret": { "start": 0, "length": 0 },
+      "key": { key: "KEY_Backspace", type: "keydown" },
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3",
+                    "runCompositionTest", "#5-2") ||
+      !checkSelection(4, "", "runCompositionTest", "#5-2")) {
+    return;
+  }
+
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Backspace", type: "keyup" } });
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3",
+                    "runCompositionTest", "#5-3") ||
+      !checkSelection(4, "", "runCompositionTest", "#5-3")) {
+    return;
+  }
+
+  // Undo tests for the testcases for bug 23558 and bug 271815
+  synthesizeKey("z", { accelKey: true });
+
+  // XXX this is unexpected behavior, see bug 258291
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3",
+                    "runCompositionTest", "#6-1") ||
+      !checkSelection(4, "", "runCompositionTest", "#6-1")) {
+    return;
+  }
+
+  synthesizeKey("z", { accelKey: true });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u9AD8",
+                    "runCompositionTest", "#6-2") ||
+      !checkSelection(5, "", "runCompositionTest", "#6-2")) {
+    return;
+  }
+
+  synthesizeKey("z", { accelKey: true });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u6700",
+                    "runCompositionTest", "#6-3") ||
+      !checkSelection(4, "\u6700", "runCompositionTest", "#6-3")) {
+    return;
+  }
+
+  synthesizeKey("z", { accelKey: true });
+
+  // XXX this is unexpected behavior, see bug 258291
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u6700",
+                    "runCompositionTest", "#6-4") ||
+      !checkSelection(5, "", "runCompositionTest", "#6-4")) {
+    return;
+  }
+
+  synthesizeKey("z", { accelKey: true });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3",
+                    "runCompositionTest", "#6-5") ||
+      !checkSelection(4, "", "runCompositionTest", "#6-5")) {
+    // eslint-disable-next-line no-useless-return
+    return;
+  }
+}
+
+function runCompositionEventTest()
+{
+  const kDescription = "runCompositionEventTest: ";
+  const kEvents = ["compositionstart", "compositionupdate", "compositionend",
+                   "input"];
+
+  input.value = "";
+  input.focus();
+
+  let windowEventCounts = [], windowEventData = [], windowEventLocale = [];
+  let inputEventCounts = [], inputEventData = [], inputEventLocale = [];
+  let preventDefault = false;
+  let stopPropagation = false;
+
+  function initResults()
+  {
+    for (let i = 0; i < kEvents.length; i++) {
+      windowEventCounts[kEvents[i]] = 0;
+      windowEventData[kEvents[i]] = "";
+      windowEventLocale[kEvents[i]] = "";
+      inputEventCounts[kEvents[i]] = 0;
+      inputEventData[kEvents[i]] = "";
+      inputEventLocale[kEvents[i]] = "";
+    }
+  }
+
+  function compositionEventHandlerForWindow(aEvent)
+  {
+    windowEventCounts[aEvent.type]++;
+    windowEventData[aEvent.type] = aEvent.data;
+    windowEventLocale[aEvent.type] = aEvent.locale;
+    if (preventDefault) {
+      aEvent.preventDefault();
+    }
+    if (stopPropagation) {
+      aEvent.stopPropagation();
+    }
+  }
+
+  function formEventHandlerForWindow(aEvent)
+  {
+    ok(aEvent.isTrusted, "input events must be trusted events");
+    windowEventCounts[aEvent.type]++;
+    windowEventData[aEvent.type] = input.value;
+  }
+
+  function compositionEventHandlerForInput(aEvent)
+  {
+    inputEventCounts[aEvent.type]++;
+    inputEventData[aEvent.type] = aEvent.data;
+    inputEventLocale[aEvent.type] = aEvent.locale;
+    if (preventDefault) {
+      aEvent.preventDefault();
+    }
+    if (stopPropagation) {
+      aEvent.stopPropagation();
+    }
+  }
+
+  function formEventHandlerForInput(aEvent)
+  {
+    inputEventCounts[aEvent.type]++;
+    inputEventData[aEvent.type] = input.value;
+  }
+
+  window.addEventListener("compositionstart", compositionEventHandlerForWindow,
+                          true, true);
+  window.addEventListener("compositionend", compositionEventHandlerForWindow,
+                          true, true);
+  window.addEventListener("compositionupdate", compositionEventHandlerForWindow,
+                          true, true);
+  window.addEventListener("input", formEventHandlerForWindow,
+                          true, true);
+
+  input.addEventListener("compositionstart", compositionEventHandlerForInput,
+                         true, true);
+  input.addEventListener("compositionend", compositionEventHandlerForInput,
+                         true, true);
+  input.addEventListener("compositionupdate", compositionEventHandlerForInput,
+                         true, true);
+  input.addEventListener("input", formEventHandlerForInput,
+                         true, true);
+
+  // test for normal case
+  initResults();
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "o" },
+    });
+
+  is(windowEventCounts.compositionstart, 1,
+     kDescription + "compositionstart hasn't been handled by window #1");
+  is(windowEventData.compositionstart, "",
+     kDescription + "data of compositionstart isn't empty (window) #1");
+  is(windowEventLocale.compositionstart, "",
+     kDescription + "locale of compositionstart isn't empty (window) #1");
+  is(inputEventCounts.compositionstart, 1,
+     kDescription + "compositionstart hasn't been handled by input #1");
+  is(inputEventData.compositionstart, "",
+     kDescription + "data of compositionstart isn't empty (input) #1");
+  is(inputEventLocale.compositionstart, "",
+     kDescription + "locale of compositionstart isn't empty (input) #1");
+
+  is(windowEventCounts.compositionupdate, 1,
+     kDescription + "compositionupdate hasn't been handled by window #1");
+  is(windowEventData.compositionupdate, "\u3089",
+     kDescription + "data of compositionupdate doesn't match (window) #1");
+  is(windowEventLocale.compositionupdate, "",
+     kDescription + "locale of compositionupdate isn't empty (window) #1");
+  is(inputEventCounts.compositionupdate, 1,
+     kDescription + "compositionupdate hasn't been handled by input #1");
+  is(inputEventData.compositionupdate, "\u3089",
+     kDescription + "data of compositionupdate doesn't match (input) #1");
+  is(inputEventLocale.compositionupdate, "",
+     kDescription + "locale of compositionupdate isn't empty (input) #1");
+
+  is(windowEventCounts.compositionend, 0,
+     kDescription + "compositionend has been handled by window #1");
+  is(inputEventCounts.compositionend, 0,
+     kDescription + "compositionend has been handled by input #1");
+
+  is(windowEventCounts.input, 1,
+     kDescription + "input hasn't been handled by window #1");
+  is(windowEventData.input, "\u3089",
+     kDescription + "value of input element wasn't modified (window) #1");
+  is(inputEventCounts.input, 1,
+     kDescription + "input hasn't been handled by input #1");
+  is(inputEventData.input, "\u3089",
+     kDescription + "value of input element wasn't modified (input) #1");
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC",
+        "clauses":
+        [
+          { "length": 2, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 },
+      "key": { key: "\\", code: "IntlYen", keyCode: KeyboardEvent.DOM_VK_BACKSLASH },
+    });
+
+  is(windowEventCounts.compositionstart, 1,
+     kDescription + "compositionstart has been handled more than once by window #2");
+  is(inputEventCounts.compositionstart, 1,
+     kDescription + "compositionstart has been handled more than once by input #2");
+
+  is(windowEventCounts.compositionupdate, 2,
+     kDescription + "compositionupdate hasn't been handled by window #2");
+  is(windowEventData.compositionupdate, "\u3089\u30FC",
+     kDescription + "data of compositionupdate doesn't match (window) #2");
+  is(windowEventLocale.compositionupdate, "",
+     kDescription + "locale of compositionupdate isn't empty (window) #2");
+  is(inputEventCounts.compositionupdate, 2,
+     kDescription + "compositionupdate hasn't been handled by input #2");
+  is(inputEventData.compositionupdate, "\u3089\u30FC",
+     kDescription + "data of compositionupdate doesn't match (input) #2");
+  is(inputEventLocale.compositionupdate, "",
+     kDescription + "locale of compositionupdate isn't empty (input) #2");
+
+  is(windowEventCounts.compositionend, 0,
+     kDescription + "compositionend has been handled during composition by window #2");
+  is(inputEventCounts.compositionend, 0,
+     kDescription + "compositionend has been handled during composition by input #2");
+
+  is(windowEventCounts.input, 2,
+     kDescription + "input hasn't been handled by window #2");
+  is(windowEventData.input, "\u3089\u30FC",
+     kDescription + "value of input element wasn't modified (window) #2");
+  is(inputEventCounts.input, 2,
+     kDescription + "input hasn't been handled by input #2");
+  is(inputEventData.input, "\u3089\u30FC",
+     kDescription + "value of input element wasn't modified (input) #2");
+
+  // text event shouldn't cause composition update, e.g., at committing.
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter" } });
+
+  is(windowEventCounts.compositionstart, 1,
+     kDescription + "compositionstart has been handled more than once by window #3");
+  is(inputEventCounts.compositionstart, 1,
+     kDescription + "compositionstart has been handled more than once by input #3");
+
+  is(windowEventCounts.compositionupdate, 2,
+     kDescription + "compositionupdate has been fired unexpectedly on window #3");
+  is(inputEventCounts.compositionupdate, 2,
+     kDescription + "compositionupdate has been fired unexpectedly on input #3");
+
+  is(windowEventCounts.compositionend, 1,
+     kDescription + "compositionend hasn't been handled by window #3");
+  is(windowEventData.compositionend, "\u3089\u30FC",
+     kDescription + "data of compositionend doesn't match (window) #3");
+  is(windowEventLocale.compositionend, "",
+     kDescription + "locale of compositionend isn't empty (window) #3");
+  is(inputEventCounts.compositionend, 1,
+     kDescription + "compositionend hasn't been handled by input #3");
+  is(inputEventData.compositionend, "\u3089\u30FC",
+     kDescription + "data of compositionend doesn't match (input) #3");
+  is(inputEventLocale.compositionend, "",
+     kDescription + "locale of compositionend isn't empty (input) #3");
+
+  is(windowEventCounts.input, 3,
+     kDescription + "input hasn't been handled by window #3");
+  is(windowEventData.input, "\u3089\u30FC",
+     kDescription + "value of input element wasn't modified (window) #3");
+  is(inputEventCounts.input, 3,
+     kDescription + "input hasn't been handled by input #3");
+  is(inputEventData.input, "\u3089\u30FC",
+     kDescription + "value of input element wasn't modified (input) #3");
+
+  // select the second character, then, data of composition start should be
+  // the selected character.
+  initResults();
+  synthesizeKey("KEY_ArrowLeft", {shiftKey: true});
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "o" },
+    });
+
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter" } });
+
+  is(windowEventCounts.compositionstart, 1,
+     kDescription + "compositionstart hasn't been handled by window #4");
+  is(windowEventData.compositionstart, "\u30FC",
+     kDescription + "data of compositionstart is empty (window) #4");
+  is(windowEventLocale.compositionstart, "",
+     kDescription + "locale of compositionstart isn't empty (window) #4");
+  is(inputEventCounts.compositionstart, 1,
+     kDescription + "compositionstart hasn't been handled by input #4");
+  is(inputEventData.compositionstart, "\u30FC",
+     kDescription + "data of compositionstart is empty (input) #4");
+  is(inputEventLocale.compositionstart, "",
+     kDescription + "locale of compositionstart isn't empty (input) #4");
+
+  is(windowEventCounts.compositionupdate, 1,
+     kDescription + "compositionupdate hasn't been handled by window #4");
+  is(windowEventData.compositionupdate, "\u3089",
+     kDescription + "data of compositionupdate doesn't match (window) #4");
+  is(windowEventLocale.compositionupdate, "",
+     kDescription + "locale of compositionupdate isn't empty (window) #4");
+  is(inputEventCounts.compositionupdate, 1,
+     kDescription + "compositionupdate hasn't been handled by input #4");
+  is(inputEventData.compositionupdate, "\u3089",
+     kDescription + "data of compositionupdate doesn't match (input) #4");
+  is(inputEventLocale.compositionupdate, "",
+     kDescription + "locale of compositionupdate isn't empty (input) #4");
+
+  is(windowEventCounts.compositionend, 1,
+     kDescription + "compositionend hasn't been handled by window #4");
+  is(windowEventData.compositionend, "\u3089",
+     kDescription + "data of compositionend doesn't match (window) #4");
+  is(windowEventLocale.compositionend, "",
+     kDescription + "locale of compositionend isn't empty (window) #4");
+  is(inputEventCounts.compositionend, 1,
+     kDescription + "compositionend hasn't been handled by input #4");
+  is(inputEventData.compositionend, "\u3089",
+     kDescription + "data of compositionend doesn't match (input) #4");
+  is(inputEventLocale.compositionend, "",
+     kDescription + "locale of compositionend isn't empty (input) #4");
+
+  is(windowEventCounts.input, 2,
+     kDescription + "input hasn't been handled by window #4");
+  is(windowEventData.input, "\u3089\u3089",
+     kDescription + "value of input element wasn't modified (window) #4");
+  is(inputEventCounts.input, 2,
+     kDescription + "input hasn't been handled by input #4");
+  is(inputEventData.input, "\u3089\u3089",
+     kDescription + "value of input element wasn't modified (input) #4");
+
+  // preventDefault() should effect nothing.
+  preventDefault = true;
+
+  initResults();
+  synthesizeKey("a", { accelKey: true }); // Select All
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306D",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "," },
+    });
+
+  synthesizeComposition({ type: "compositioncommitasis" });
+
+  is(windowEventCounts.compositionstart, 1,
+     kDescription + "compositionstart hasn't been handled by window #5");
+  is(windowEventData.compositionstart, "\u3089\u3089",
+     kDescription + "data of compositionstart is empty (window) #5");
+  is(windowEventLocale.compositionstart, "",
+     kDescription + "locale of compositionstart isn't empty (window) #5");
+  is(inputEventCounts.compositionstart, 1,
+     kDescription + "compositionstart hasn't been handled by input #5");
+  is(inputEventData.compositionstart, "\u3089\u3089",
+     kDescription + "data of compositionstart is empty (input) #5");
+  is(inputEventLocale.compositionstart, "",
+     kDescription + "locale of compositionstart isn't empty (input) #5");
+
+  is(windowEventCounts.compositionupdate, 1,
+     kDescription + "compositionupdate hasn't been handled by window #5");
+  is(windowEventData.compositionupdate, "\u306D",
+     kDescription + "data of compositionupdate doesn't match (window) #5");
+  is(windowEventLocale.compositionupdate, "",
+     kDescription + "locale of compositionupdate isn't empty (window) #5");
+  is(inputEventCounts.compositionupdate, 1,
+     kDescription + "compositionupdate hasn't been handled by input #5");
+  is(inputEventData.compositionupdate, "\u306D",
+     kDescription + "data of compositionupdate doesn't match (input) #5");
+  is(inputEventLocale.compositionupdate, "",
+     kDescription + "locale of compositionupdate isn't empty (input) #5");
+
+  is(windowEventCounts.compositionend, 1,
+     kDescription + "compositionend hasn't been handled by window #5");
+  is(windowEventData.compositionend, "\u306D",
+     kDescription + "data of compositionend doesn't match (window) #5");
+  is(windowEventLocale.compositionend, "",
+     kDescription + "locale of compositionend isn't empty (window) #5");
+  is(inputEventCounts.compositionend, 1,
+     kDescription + "compositionend hasn't been handled by input #5");
+  is(inputEventData.compositionend, "\u306D",
+     kDescription + "data of compositionend doesn't match (input) #5");
+  is(inputEventLocale.compositionend, "",
+     kDescription + "locale of compositionend isn't empty (input) #5");
+
+  is(windowEventCounts.input, 2,
+     kDescription + "input hasn't been handled by window #5");
+  is(windowEventData.input, "\u306D",
+     kDescription + "value of input element wasn't modified (window) #5");
+  is(inputEventCounts.input, 2,
+     kDescription + "input hasn't been handled by input #5");
+  is(inputEventData.input, "\u306D",
+     kDescription + "value of input element wasn't modified (input) #5");
+
+  preventDefault = false;
+
+  // stopPropagation() should effect nothing (except event count)
+  stopPropagation = true;
+
+  initResults();
+  synthesizeKey("a", { accelKey: true }); // Select All
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "\\", code: "IntlRo", keyCode: KeyboardEvent.DOM_VK_BACKSLASH },
+    });
+
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter" } });
+
+  is(windowEventCounts.compositionstart, 1,
+     kDescription + "compositionstart hasn't been handled by window #6");
+  is(windowEventData.compositionstart, "\u306D",
+     kDescription + "data of compositionstart is empty #6");
+  is(windowEventLocale.compositionstart, "",
+     kDescription + "locale of compositionstart isn't empty #6");
+  is(inputEventCounts.compositionstart, 0,
+     kDescription + "compositionstart has been handled by input #6");
+
+  is(windowEventCounts.compositionupdate, 1,
+     kDescription + "compositionupdate hasn't been handled by window #6");
+  is(windowEventData.compositionupdate, "\u306E",
+     kDescription + "data of compositionupdate doesn't match #6");
+  is(windowEventLocale.compositionupdate, "",
+     kDescription + "locale of compositionupdate isn't empty #6");
+  is(inputEventCounts.compositionupdate, 0,
+     kDescription + "compositionupdate has been handled by input #6");
+
+  is(windowEventCounts.compositionend, 1,
+     kDescription + "compositionend hasn't been handled by window #6");
+  is(windowEventData.compositionend, "\u306E",
+     kDescription + "data of compositionend doesn't match #6");
+  is(windowEventLocale.compositionend, "",
+     kDescription + "locale of compositionend isn't empty #6");
+  is(inputEventCounts.compositionend, 0,
+     kDescription + "compositionend has been handled by input #6");
+
+  is(windowEventCounts.input, 2,
+     kDescription + "input hasn't been handled by window #6");
+  is(windowEventData.input, "\u306E",
+     kDescription + "value of input element wasn't modified (window) #6");
+  is(inputEventCounts.input, 2,
+     kDescription + "input hasn't been handled by input #6");
+  is(inputEventData.input, "\u306E",
+     kDescription + "value of input element wasn't modified (input) #6");
+
+  stopPropagation = false;
+
+  // create event and dispatch it.
+  initResults();
+
+  input.value = "value of input";
+  synthesizeKey("a", { accelKey: true }); // Select All
+
+  let compositionstart = document.createEvent("CompositionEvent");
+  compositionstart.initCompositionEvent("compositionstart",
+                                        true, true, document.defaultView,
+                                        "start data", "start locale");
+  is(compositionstart.type, "compositionstart",
+     kDescription + "type doesn't match #7");
+  is(compositionstart.data, "start data",
+     kDescription + "data doesn't match #7");
+  is(compositionstart.locale, "start locale",
+     kDescription + "locale doesn't match #7");
+  is(compositionstart.detail, 0,
+     kDescription + "detail isn't 0 #7");
+
+  input.dispatchEvent(compositionstart);
+
+  is(windowEventCounts.compositionstart, 1,
+     kDescription + "compositionstart hasn't been handled by window #7");
+  is(windowEventData.compositionstart, "start data",
+     kDescription + "data of compositionstart was changed (window) #7");
+  is(windowEventLocale.compositionstart, "start locale",
+     kDescription + "locale of compositionstart was changed (window) #7");
+  is(inputEventCounts.compositionstart, 1,
+     kDescription + "compositionstart hasn't been handled by input #7");
+  is(inputEventData.compositionstart, "start data",
+     kDescription + "data of compositionstart was changed (input) #7");
+  is(inputEventLocale.compositionstart, "start locale",
+     kDescription + "locale of compositionstart was changed (input) #7");
+
+  is(input.value, "value of input",
+     kDescription + "input value was changed #7");
+
+  let compositionupdate1 = document.createEvent("compositionevent");
+  compositionupdate1.initCompositionEvent("compositionupdate",
+                                          true, false, document.defaultView,
+                                          "composing string", "composing locale");
+  is(compositionupdate1.type, "compositionupdate",
+     kDescription + "type doesn't match #8");
+  is(compositionupdate1.data, "composing string",
+     kDescription + "data doesn't match #8");
+  is(compositionupdate1.locale, "composing locale",
+     kDescription + "locale doesn't match #8");
+  is(compositionupdate1.detail, 0,
+     kDescription + "detail isn't 0 #8");
+
+  input.dispatchEvent(compositionupdate1);
+
+  is(windowEventCounts.compositionupdate, 1,
+     kDescription + "compositionupdate hasn't been handled by window #8");
+  is(windowEventData.compositionupdate, "composing string",
+     kDescription + "data of compositionupdate was changed (window) #8");
+  is(windowEventLocale.compositionupdate, "composing locale",
+     kDescription + "locale of compositionupdate was changed (window) #8");
+  is(inputEventCounts.compositionupdate, 1,
+     kDescription + "compositionupdate hasn't been handled by input #8");
+  is(inputEventData.compositionupdate, "composing string",
+     kDescription + "data of compositionupdate was changed (input) #8");
+  is(inputEventLocale.compositionupdate, "composing locale",
+     kDescription + "locale of compositionupdate was changed (input) #8");
+
+  is(input.value, "value of input",
+     kDescription + "input value was changed #8");
+
+  let compositionupdate2 = document.createEvent("compositionEvent");
+  compositionupdate2.initCompositionEvent("compositionupdate",
+                                          true, false, document.defaultView,
+                                          "commit string", "commit locale");
+  is(compositionupdate2.type, "compositionupdate",
+     kDescription + "type doesn't match #9");
+  is(compositionupdate2.data, "commit string",
+     kDescription + "data doesn't match #9");
+  is(compositionupdate2.locale, "commit locale",
+     kDescription + "locale doesn't match #9");
+  is(compositionupdate2.detail, 0,
+     kDescription + "detail isn't 0 #9");
+
+  input.dispatchEvent(compositionupdate2);
+
+  is(windowEventCounts.compositionupdate, 2,
+     kDescription + "compositionupdate hasn't been handled by window #9");
+  is(windowEventData.compositionupdate, "commit string",
+     kDescription + "data of compositionupdate was changed (window) #9");
+  is(windowEventLocale.compositionupdate, "commit locale",
+     kDescription + "locale of compositionupdate was changed (window) #9");
+  is(inputEventCounts.compositionupdate, 2,
+     kDescription + "compositionupdate hasn't been handled by input #9");
+  is(inputEventData.compositionupdate, "commit string",
+     kDescription + "data of compositionupdate was changed (input) #9");
+  is(inputEventLocale.compositionupdate, "commit locale",
+     kDescription + "locale of compositionupdate was changed (input) #9");
+
+  is(input.value, "value of input",
+     kDescription + "input value was changed #9");
+
+  let compositionend = document.createEvent("Compositionevent");
+  compositionend.initCompositionEvent("compositionend",
+                                      true, false, document.defaultView,
+                                      "end data", "end locale");
+  is(compositionend.type, "compositionend",
+     kDescription + "type doesn't match #10");
+  is(compositionend.data, "end data",
+     kDescription + "data doesn't match #10");
+  is(compositionend.locale, "end locale",
+     kDescription + "locale doesn't match #10");
+  is(compositionend.detail, 0,
+     kDescription + "detail isn't 0 #10");
+
+  input.dispatchEvent(compositionend);
+
+  is(windowEventCounts.compositionend, 1,
+     kDescription + "compositionend hasn't been handled by window #10");
+  is(windowEventData.compositionend, "end data",
+     kDescription + "data of compositionend was changed (window) #10");
+  is(windowEventLocale.compositionend, "end locale",
+     kDescription + "locale of compositionend was changed (window) #10");
+  is(inputEventCounts.compositionend, 1,
+     kDescription + "compositionend hasn't been handled by input #10");
+  is(inputEventData.compositionend, "end data",
+     kDescription + "data of compositionend was changed (input) #10");
+  is(inputEventLocale.compositionend, "end locale",
+     kDescription + "locale of compositionend was changed (input) #10");
+
+  is(input.value, "value of input",
+     kDescription + "input value was changed #10");
+
+  window.removeEventListener("compositionstart",
+                             compositionEventHandlerForWindow, true);
+  window.removeEventListener("compositionend",
+                             compositionEventHandlerForWindow, true);
+  window.removeEventListener("compositionupdate",
+                             compositionEventHandlerForWindow, true);
+  window.removeEventListener("input",
+                             formEventHandlerForWindow, true);
+
+  input.removeEventListener("compositionstart",
+                            compositionEventHandlerForInput, true);
+  input.removeEventListener("compositionend",
+                            compositionEventHandlerForInput, true);
+  input.removeEventListener("compositionupdate",
+                            compositionEventHandlerForInput, true);
+  input.removeEventListener("input",
+                            formEventHandlerForInput, true);
+}
+
+// eslint-disable-next-line complexity
+function runQueryTextRectInContentEditableTest()
+{
+  contenteditable.focus();
+
+  contenteditable.innerHTML = "<p>abc</p><p>def</p>";
+                      // \n    0  123    4  567
+                      // \r\n  01 234    56 789
+
+  let description = "runTextRectInContentEditableTest: \"" + contenteditable.innerHTML + "\", ";
+
+  // "a"
+  let a = synthesizeQueryTextRect(kLFLen, 1);
+  if (!checkQueryContentResult(a, description + "rect for 'a'")) {
+    return;
+  }
+
+  // "b"
+  let b = synthesizeQueryTextRect(kLFLen + 1, 1);
+  if (!checkQueryContentResult(b, description + "rect for 'b'")) {
+    return;
+  }
+
+  is(b.top, a.top, description + "'a' and 'b' should be at same top");
+  isSimilarTo(b.left, a.left + a.width, 2, description + "left of 'b' should be at similar to right of 'a'");
+  is(b.height, a.height, description + "'a' and 'b' should be same height");
+
+  // "c"
+  let c = synthesizeQueryTextRect(kLFLen + 2, 1);
+  if (!checkQueryContentResult(c, description + "rect for 'c'")) {
+    return;
+  }
+
+  is(c.top, b.top, description + "'b' and 'c' should be at same top");
+  isSimilarTo(c.left, b.left + b.width, 2, description + "left of 'c' should be at similar to right of 'b'");
+  is(c.height, b.height, description + "'b' and 'c' should be same height");
+
+  // "abc" as array
+  let abcAsArray = synthesizeQueryTextRectArray(kLFLen, 3);
+  if (!checkQueryContentResult(abcAsArray, description + "rect array for 'abc'") ||
+      !checkRectArray(abcAsArray, [a, b, c], description + "query text rect array result of 'abc' should match with each query text rect result")) {
+    return;
+  }
+
+  // 2nd <p> (can be computed with the rect of 'c')
+  let p2 = synthesizeQueryTextRect(kLFLen + 3, 1);
+  if (!checkQueryContentResult(p2, description + "rect for 2nd <p>")) {
+    return;
+  }
+
+  is(p2.top, c.top, description + "'c' and a line breaker caused by 2nd <p> should be at same top");
+  isSimilarTo(p2.left, c.left + c.width, 2, description + "left of a line breaker caused by 2nd <p> should be at similar to right of 'c'");
+  is(p2.height, c.height, description + "'c' and a line breaker caused by 2nd <p> should be same height");
+
+  // 2nd <p> as array
+  let p2AsArray = synthesizeQueryTextRectArray(kLFLen + 3, 1);
+  if (!checkQueryContentResult(p2AsArray, description + "2nd <p>'s line breaker as array") ||
+      !checkRectArray(p2AsArray, [p2], description + "query text rect array result of 2nd <p> should match with each query text rect result")) {
+    return;
+  }
+
+  if (kLFLen > 1) {
+    // \n of \r\n
+    let p2_2 = synthesizeQueryTextRect(kLFLen + 4, 1);
+    if (!checkQueryContentResult(p2_2, description + "rect for \\n of \\r\\n caused by 2nd <p>")) {
+      return;
+    }
+
+    is(p2_2.top, p2.top, description + "'\\r' and '\\n' should be at same top");
+    is(p2_2.left, p2.left, description + "'\\r' and '\\n' should be at same top");
+    is(p2_2.height, p2.height, description + "'\\r' and '\\n' should be same height");
+    is(p2_2.width, p2.width, description + "'\\r' and '\\n' should be same width");
+
+    // \n of \r\n as array
+    let p2_2AsArray = synthesizeQueryTextRectArray(kLFLen + 4, 1);
+    if (!checkQueryContentResult(p2_2AsArray, description + "rect array for \\n of \\r\\n caused by 2nd <p>") ||
+        !checkRectArray(p2_2AsArray, [p2_2], description + "query text rect array result of \\n of \\r\\n caused by 2nd <p> should match with each query text rect result")) {
+      return;
+    }
+  }
+
+  // "d"
+  let d = synthesizeQueryTextRect(kLFLen * 2 + 3, 1);
+  if (!checkQueryContentResult(d, description + "rect for 'd'")) {
+    return;
+  }
+
+  isGreaterThan(d.top, a.top + a.height, description + "top of 'd' should be greater than bottom of 'a'");
+  is(d.left, a.left, description + "'a' and 'd' should be same at same left");
+  is(d.height, a.height, description + "'a' and 'd' should be same height");
+
+  // "e"
+  let e = synthesizeQueryTextRect(kLFLen * 2 + 4, 1);
+  if (!checkQueryContentResult(e, description + "rect for 'e'")) {
+    return;
+  }
+
+  is(e.top, d.top, description + "'d' and 'd' should be at same top");
+  isSimilarTo(e.left, d.left + d.width, 2, description + "left of 'e' should be at similar to right of 'd'");
+  is(e.height, d.height, description + "'d' and 'e' should be same height");
+
+  // "f"
+  let f = synthesizeQueryTextRect(kLFLen * 2 + 5, 1);
+  if (!checkQueryContentResult(f, description + "rect for 'f'")) {
+    return;
+  }
+
+  is(f.top, e.top, description + "'e' and 'f' should be at same top");
+  isSimilarTo(f.left, e.left + e.width, 2, description + "left of 'f' should be at similar to right of 'e'");
+  is(f.height, e.height, description + "'e' and 'f' should be same height");
+
+  // "def" as array
+  let defAsArray = synthesizeQueryTextRectArray(kLFLen * 2 + 3, 3);
+  if (!checkQueryContentResult(defAsArray, description + "rect array for 'def'") ||
+      !checkRectArray(defAsArray, [d, e, f], description + "query text rect array result of 'def' should match with each query text rect result")) {
+    return;
+  }
+
+  // next of "f" (can be computed with rect of 'f')
+  let next_f = synthesizeQueryTextRect(kLFLen * 2 + 6, 1);
+  if (!checkQueryContentResult(next_f, description + "rect for next of 'f'")) {
+    return;
+  }
+
+  is(next_f.top, d.top, 2, description + "'f' and next of 'f' should be at same top");
+  isSimilarTo(next_f.left, f.left + f.width, 2, description + "left of next of 'f' should be at similar to right of 'f'");
+  is(next_f.height, d.height, description + "'f' and next of 'f' should be same height");
+
+  // next of "f" as array
+  let next_fAsArray = synthesizeQueryTextRectArray(kLFLen * 2 + 6, 1);
+  if (!checkQueryContentResult(next_fAsArray, description + "rect array for next of 'f'") ||
+      !checkRectArray(next_fAsArray, [next_f], description + "query text rect array result of next of 'f' should match with each query text rect result")) {
+    return;
+  }
+
+  // too big offset for the editor
+  let tooBigOffset = synthesizeQueryTextRect(kLFLen * 2 + 7, 1);
+  if (!checkQueryContentResult(tooBigOffset, description + "rect for too big offset")) {
+    return;
+  }
+
+  is(tooBigOffset.top, next_f.top, description + "too big offset and next of 'f' should be at same top");
+  is(tooBigOffset.left, next_f.left, description + "too big offset and next of 'f' should be at same left");
+  is(tooBigOffset.height, next_f.height, description + "too big offset and next of 'f' should be same height");
+  is(tooBigOffset.width, next_f.width, description + "too big offset and next of 'f' should be same width");
+
+  // too big offset for the editors as array
+  let tooBigOffsetAsArray = synthesizeQueryTextRectArray(kLFLen * 2 + 7, 1);
+  if (!checkQueryContentResult(tooBigOffsetAsArray, description + "rect array for too big offset") ||
+      !checkRectArray(tooBigOffsetAsArray, [tooBigOffset], description + "query text rect array result with too big offset should match with each query text rect result")) {
+    return;
+  }
+
+  contenteditable.innerHTML = "<p>abc</p><p>def</p><p><br></p>";
+                      // \n    0  123    4  567    8  9
+                      // \r\n  01 234    56 789    01 23
+
+  description = "runTextRectInContentEditableTest: \"" + contenteditable.innerHTML + "\", ";
+
+  // "f"
+  f = synthesizeQueryTextRect(kLFLen * 2 + 5, 1);
+  if (!checkQueryContentResult(f, description + "rect for 'f'")) {
+    return;
+  }
+
+  is(f.top, e.top, description + "'e' and 'f' should be at same top");
+  is(f.height, e.height, description + "'e' and 'f' should be same height");
+  isSimilarTo(f.left, e.left + e.width, 2, description + "left of 'f' should be at similar to right of 'e'");
+
+  // 3rd <p> (can be computed with rect of 'f')
+  let p3 = synthesizeQueryTextRect(kLFLen * 2 + 6, 1);
+  if (!checkQueryContentResult(p3, description + "rect for 3rd <p>")) {
+    return;
+  }
+
+  is(p3.top, f.top, description + "'f' and a line breaker caused by 3rd <p> should be at same top");
+  is(p3.height, f.height, description + "'f' and a line breaker caused by 3rd <p> should be same height");
+  isSimilarTo(p3.left, f.left + f.width, 2, description + "left of a line breaker caused by 3rd <p> should be similar to right of 'f'");
+
+  // 3rd <p> as array
+  let p3AsArray = synthesizeQueryTextRectArray(kLFLen * 2 + 6, 1);
+  if (!checkQueryContentResult(p3AsArray, description + "3rd <p>'s line breaker as array") ||
+      !checkRectArray(p3AsArray, [p3], description + "query text rect array result of 3rd <p> should match with each query text rect result")) {
+    return;
+  }
+
+  if (kLFLen > 1) {
+    // \n of \r\n
+    let p3_2 = synthesizeQueryTextRect(kLFLen * 2 + 7, 1);
+    if (!checkQueryContentResult(p3_2, description + "rect for \\n of \\r\\n caused by 3rd <p>")) {
+      return;
+    }
+
+    is(p3_2.top, p3.top, description + "'\\r' and '\\n' should be at same top");
+    is(p3_2.left, p3.left, description + "'\\r' and '\\n' should be at same top");
+    is(p3_2.height, p3.height, description + "'\\r' and '\\n' should be same height");
+    is(p3_2.width, p3.width, description + "'\\r' and '\\n' should be same width");
+
+    // \n of \r\n as array
+    let p3_2AsArray = synthesizeQueryTextRectArray(kLFLen * 2 + 7, 1);
+    if (!checkQueryContentResult(p3_2AsArray, description + "rect array for \\n of \\r\\n caused by 3rd <p>") ||
+        !checkRectArray(p3_2AsArray, [p3_2], description + "query text rect array result of \\n of \\r\\n caused by 3rd <p> should match with each query text rect result")) {
+      return;
+    }
+  }
+
+  // <br> in 3rd <p>
+  let br = synthesizeQueryTextRect(kLFLen * 3 + 6, 1);
+  if (!checkQueryContentResult(br, description + "rect for <br> in 3rd <p>")) {
+    return;
+  }
+
+  isGreaterThan(br.top, d.top + d.height, description + "a line breaker caused by <br> in 3rd <p> should be greater than bottom of 'd'");
+  isSimilarTo(br.height, d.height, 2, description + "'d' and a line breaker caused by <br> in 3rd <p> should be similar height");
+  is(br.left, d.left, description + "left of a line breaker caused by <br> in 3rd <p> should be same left of 'd'");
+
+  // <br> in 3rd <p> as array
+  let brAsArray = synthesizeQueryTextRectArray(kLFLen * 3 + 6, 1);
+  if (!checkQueryContentResult(brAsArray, description + "<br> in 3rd <p> as array") ||
+      !checkRectArray(brAsArray, [br], description + "query text rect array result of <br> in 3rd <p> should match with each query text rect result")) {
+    return;
+  }
+
+  if (kLFLen > 1) {
+    // \n of \r\n
+    let br_2 = synthesizeQueryTextRect(kLFLen * 3 + 7, 1);
+    if (!checkQueryContentResult(br_2, description + "rect for \\n of \\r\\n caused by <br> in 3rd <p>")) {
+      return;
+    }
+
+    is(br_2.top, br.top, description + "'\\r' and '\\n' should be at same top");
+    is(br_2.left, br.left, description + "'\\r' and '\\n' should be at same top");
+    is(br_2.height, br.height, description + "'\\r' and '\\n' should be same height");
+    is(br_2.width, br.width, description + "'\\r' and '\\n' should be same width");
+
+    // \n of \r\n as array
+    let br_2AsArray = synthesizeQueryTextRectArray(kLFLen * 3 + 7, 1);
+    if (!checkQueryContentResult(br_2AsArray, description + "rect array for \\n of \\r\\n caused by <br> in 3rd <p>") ||
+        !checkRectArray(br_2AsArray, [br_2], description + "query text rect array result of \\n of \\r\\n caused by <br> in 3rd <p> should match with each query text rect result")) {
+      return;
+    }
+  }
+
+  // next of <br> in 3rd <p>
+  let next_br = synthesizeQueryTextRect(kLFLen * 4 + 6, 1);
+  if (!checkQueryContentResult(next_br, description + "rect for next of <br> in 3rd <p>")) {
+    return;
+  }
+
+  is(next_br.top, br.top, description + "next of <br> and <br> should be at same top");
+  is(next_br.left, br.left, description + "next of <br> and <br> should be at same left");
+  is(next_br.height, br.height, description + "next of <br> and <br> should be same height");
+  is(next_br.width, br.width, description + "next of <br> and <br> should be same width");
+
+  // next of <br> in 3rd <p> as array
+  let next_brAsArray = synthesizeQueryTextRectArray(kLFLen * 4 + 6, 1);
+  if (!checkQueryContentResult(next_brAsArray, description + "rect array for next of <br> in 3rd <p>") ||
+      !checkRectArray(next_brAsArray, [next_br], description + "query text rect array result of next of <br> in 3rd <p> should match with each query text rect result")) {
+    return;
+  }
+
+  // too big offset for the editor
+  tooBigOffset = synthesizeQueryTextRect(kLFLen * 4 + 7, 1);
+  if (!checkQueryContentResult(tooBigOffset, description + "rect for too big offset")) {
+    return;
+  }
+
+  is(tooBigOffset.top, next_br.top, description + "too big offset and next of 3rd <p> should be at same top");
+  is(tooBigOffset.left, next_br.left, description + "too big offset and next of 3rd <p> should be at same left");
+  is(tooBigOffset.height, next_br.height, description + "too big offset and next of 3rd <p> should be same height");
+  is(tooBigOffset.width, next_br.width, description + "too big offset and next of 3rd <p> should be same width");
+
+  // too big offset for the editors as array
+  tooBigOffsetAsArray = synthesizeQueryTextRectArray(kLFLen * 4 + 7, 1);
+  if (!checkQueryContentResult(tooBigOffsetAsArray, description + "rect array for too big offset") ||
+      !checkRectArray(tooBigOffsetAsArray, [tooBigOffset], description + "query text rect array result with too big offset should match with each query text rect result")) {
+    return;
+  }
+
+  contenteditable.innerHTML = "<p>abc</p><p>def</p><p></p>";
+                      // \n    0  123    4  567    8
+                      // \r\n  01 234    56 789    0
+
+  description = "runTextRectInContentEditableTest: \"" + contenteditable.innerHTML + "\", ";
+
+  // "f"
+  f = synthesizeQueryTextRect(kLFLen * 2 + 5, 1);
+  if (!checkQueryContentResult(f, description + "rect for 'f'")) {
+    return;
+  }
+
+  is(f.top, e.top, description + "'e' and 'f' should be at same top");
+  isSimilarTo(f.left, e.left + e.width, 2, description + "left of 'f' should be at similar to right of 'e'");
+  is(f.height, e.height, description + "'e' and 'f' should be same height");
+
+  // 3rd <p> (can be computed with rect of 'f')
+  p3 = synthesizeQueryTextRect(kLFLen * 2 + 6, 1);
+  if (!checkQueryContentResult(p3, description + "rect for 3rd <p>")) {
+    return;
+  }
+
+  is(p3.top, f.top, description + "'f' and a line breaker caused by 3rd <p> should be at same top");
+  is(p3.height, f.height, description + "'f' and a line breaker caused by 3rd <p> should be same height");
+  isSimilarTo(p3.left, f.left + f.width, 2, description + "left of a line breaker caused by 3rd <p> should be similar to right of 'f'");
+
+  // 3rd <p> as array
+  p3AsArray = synthesizeQueryTextRectArray(kLFLen * 2 + 6, 1);
+  if (!checkQueryContentResult(p3AsArray, description + "3rd <p>'s line breaker as array") ||
+      !checkRectArray(p3AsArray, [p3], description + "query text rect array result of 3rd <p> should match with each query text rect result")) {
+    return;
+  }
+
+  if (kLFLen > 1) {
+    // \n of \r\n
+    let p3_2 = synthesizeQueryTextRect(kLFLen * 2 + 7, 1);
+    if (!checkQueryContentResult(p3_2, description + "rect for \\n of \\r\\n caused by 3rd <p>")) {
+      return;
+    }
+
+    is(p3_2.top, p3.top, description + "'\\r' and '\\n' should be at same top");
+    is(p3_2.left, p3.left, description + "'\\r' and '\\n' should be at same top");
+    is(p3_2.height, p3.height, description + "'\\r' and '\\n' should be same height");
+    is(p3_2.width, p3.width, description + "'\\r' and '\\n' should be same width");
+
+    // \n of \r\n as array
+    let p3_2AsArray = synthesizeQueryTextRectArray(kLFLen * 2 + 7, 1);
+    if (!checkQueryContentResult(p3_2AsArray, description + "rect array for \\n of \\r\\n caused by 3rd <p>") ||
+        !checkRectArray(p3_2AsArray, [p3_2], description + "query text rect array result of \\n of \\r\\n caused by 3rd <p> should match with each query text rect result")) {
+      return;
+    }
+  }
+
+  // next of 3rd <p>
+  let next_p3 = synthesizeQueryTextRect(kLFLen * 3 + 6, 1);
+  if (!checkQueryContentResult(next_p3, description + "rect for next of 3rd <p>")) {
+    return;
+  }
+
+  isGreaterThan(next_p3.top, d.top + d.height, description + "top of next of 3rd <p> should equal to or be bigger than bottom of 'd'");
+  isSimilarTo(next_p3.left, d.left, 2, description + "left of next of 3rd <p> should be at similar to left of 'd'");
+  isSimilarTo(next_p3.height, d.height, 2, description + "next of 3rd <p> and 'd' should be similar height");
+
+  // next of 3rd <p> as array
+  let next_p3AsArray = synthesizeQueryTextRectArray(kLFLen * 3 + 6, 1);
+  if (!checkQueryContentResult(next_p3AsArray, description + "next of 3rd <p> as array") ||
+      !checkRectArray(next_p3AsArray, [next_p3], description + "query text rect array result of next of 3rd <p> should match with each query text rect result")) {
+    return;
+  }
+
+  // too big offset for the editor
+  tooBigOffset = synthesizeQueryTextRect(kLFLen * 3 + 7, 1);
+  if (!checkQueryContentResult(tooBigOffset, description + "rect for too big offset")) {
+    return;
+  }
+
+  is(tooBigOffset.top, next_p3.top, description + "too big offset and next of 3rd <p> should be at same top");
+  is(tooBigOffset.left, next_p3.left, description + "too big offset and next of 3rd <p> should be at same left");
+  is(tooBigOffset.height, next_p3.height, description + "too big offset and next of 3rd <p> should be same height");
+  is(tooBigOffset.width, next_p3.width, description + "too big offset and next of 3rd <p> should be same width");
+
+  // too big offset for the editors as array
+  tooBigOffsetAsArray = synthesizeQueryTextRectArray(kLFLen * 3 + 7, 1);
+  if (!checkQueryContentResult(tooBigOffsetAsArray, description + "rect array for too big offset") ||
+      !checkRectArray(tooBigOffsetAsArray, [tooBigOffset], description + "query text rect array result with too big offset should match with each query text rect result")) {
+    return;
+  }
+
+  contenteditable.innerHTML = "abc<br>def";
+                      // \n    0123   456
+                      // \r\n  01234  567
+
+  description = "runTextRectInContentEditableTest: \"" + contenteditable.innerHTML + "\", ";
+
+  // "a"
+  a = synthesizeQueryTextRect(0, 1);
+  if (!checkQueryContentResult(a, description + "rect for 'a'")) {
+    return;
+  }
+
+  // "b"
+  b = synthesizeQueryTextRect(1, 1);
+  if (!checkQueryContentResult(b, description + "rect for 'b'")) {
+    return;
+  }
+
+  is(b.top, a.top, description + "'a' and 'b' should be at same top");
+  isSimilarTo(b.left, a.left + a.width, 2, description + "left of 'b' should be at similar to right of 'a'");
+  is(b.height, a.height, description + "'a' and 'b' should be same height");
+
+  // "c"
+  c = synthesizeQueryTextRect(2, 1);
+  if (!checkQueryContentResult(c, description + "rect for 'c'")) {
+    return;
+  }
+
+  is(c.top, b.top, description + "'b' and 'c' should be at same top");
+  isSimilarTo(c.left, b.left + b.width, 2, description + "left of 'c' should be at similar to right of 'b'");
+  is(c.height, b.height, description + "'b' and 'c' should be same height");
+
+  // "abc" as array
+  abcAsArray = synthesizeQueryTextRectArray(0, 3);
+  if (!checkQueryContentResult(abcAsArray, description + "rect array for 'abc'") ||
+      !checkRectArray(abcAsArray, [a, b, c], description + "query text rect array result of 'abc' should match with each query text rect result")) {
+    return;
+  }
+
+  // <br> (can be computed with the rect of 'c')
+  br = synthesizeQueryTextRect(3, 1);
+  if (!checkQueryContentResult(br, description + "rect for <br>")) {
+    return;
+  }
+
+  is(br.top, c.top, description + "'c' and a line breaker caused by <br> should be at same top");
+  isSimilarTo(br.left, c.left + c.width, 2, description + "left of a line breaker caused by <br> should be at similar to right of 'c'");
+  is(br.height, c.height, description + "'c' and a line breaker caused by <br> should be same height");
+
+  // <br> as array
+  brAsArray = synthesizeQueryTextRectArray(3, 1);
+  if (!checkQueryContentResult(brAsArray, description + "<br>'s line breaker as array") ||
+      !checkRectArray(brAsArray, [br], description + "query text rect array result of <br> should match with each query text rect result")) {
+    return;
+  }
+
+  if (kLFLen > 1) {
+    // \n of \r\n
+    let br_2 = synthesizeQueryTextRect(4, 1);
+    if (!checkQueryContentResult(br_2, description + "rect for \n of \r\n caused by <br>")) {
+      return;
+    }
+
+    is(br_2.top, br.top, description + "'\\r' and '\\n' should be at same top");
+    is(br_2.left, br.left, description + "'\\r' and '\\n' should be at same top");
+    is(br_2.height, br.height, description + "'\\r' and '\\n' should be same height");
+    is(br_2.width, br.width, description + "'\\r' and '\\n' should be same width");
+
+    // \n of \r\n as array
+    let br_2AsArray = synthesizeQueryTextRectArray(4, 1);
+    if (!checkQueryContentResult(br_2AsArray, description + "rect array for \\n of \\r\\n caused by <br>") ||
+        !checkRectArray(br_2AsArray, [br_2], description + "query text rect array result of \\n of \\r\\n caused by <br> should match with each query text rect result")) {
+      return;
+    }
+  }
+
+  // "d"
+  d = synthesizeQueryTextRect(kLFLen + 3, 1);
+  if (!checkQueryContentResult(d, description + "rect for 'd'")) {
+    return;
+  }
+
+  isSimilarTo(d.top, a.top + a.height, 2, description + "top of 'd' should be at similar to bottom of 'a'");
+  is(d.left, a.left, description + "'a' and 'd' should be same at same left");
+  is(d.height, a.height, description + "'a' and 'd' should be same height");
+
+  // "e"
+  e = synthesizeQueryTextRect(kLFLen + 4, 1);
+  if (!checkQueryContentResult(e, description + "rect for 'e'")) {
+    return;
+  }
+
+  is(e.top, d.top, description + "'d' and 'd' should be at same top");
+  isSimilarTo(e.left, d.left + d.width, 2, description + "left of 'e' should be at similar to right of 'd'");
+  is(e.height, d.height, description + "'d' and 'e' should be same height");
+
+  // "f"
+  f = synthesizeQueryTextRect(kLFLen + 5, 1);
+  if (!checkQueryContentResult(f, description + "rect for 'f'")) {
+    return;
+  }
+
+  is(f.top, e.top, description + "'e' and 'f' should be at same top");
+  isSimilarTo(f.left, e.left + e.width, 2, description + "left of 'f' should be at similar to right of 'e'");
+  is(f.height, e.height, description + "'e' and 'f' should be same height");
+
+  // "def" as array
+  defAsArray = synthesizeQueryTextRectArray(kLFLen + 3, 3);
+  if (!checkQueryContentResult(defAsArray, description + "rect array for 'def'") ||
+      !checkRectArray(defAsArray, [d, e, f], description + "query text rect array result of 'def' should match with each query text rect result")) {
+    return;
+  }
+
+  // next of "f" (can be computed with rect of 'f')
+  next_f = synthesizeQueryTextRect(kLFLen + 6, 1);
+  if (!checkQueryContentResult(next_f, description + "rect for next of 'f'")) {
+    return;
+  }
+
+  is(next_f.top, d.top, 2, description + "'f' and next of 'f' should be at same top");
+  isSimilarTo(next_f.left, f.left + f.width, 2, description + "left of next of 'f' should be at similar to right of 'f'");
+  is(next_f.height, d.height, description + "'f' and next of 'f' should be same height");
+
+  // next of "f" as array
+  next_fAsArray = synthesizeQueryTextRectArray(kLFLen + 6, 1);
+  if (!checkQueryContentResult(next_fAsArray, description + "rect array for next of 'f'") ||
+      !checkRectArray(next_fAsArray, [next_f], description + "query text rect array result of next of 'f' should match with each query text rect result")) {
+    return;
+  }
+
+  // too big offset for the editor
+  tooBigOffset = synthesizeQueryTextRect(kLFLen + 7, 1);
+  if (!checkQueryContentResult(tooBigOffset, description + "rect for too big offset")) {
+    return;
+  }
+
+  is(tooBigOffset.top, next_f.top, description + "too big offset and next of 'f' should be at same top");
+  is(tooBigOffset.left, next_f.left, description + "too big offset and next of 'f' should be at same left");
+  is(tooBigOffset.height, next_f.height, description + "too big offset and next of 'f' should be same height");
+  is(tooBigOffset.width, next_f.width, description + "too big offset and next of 'f' should be same width");
+
+  // too big offset for the editors as array
+  tooBigOffsetAsArray = synthesizeQueryTextRectArray(kLFLen + 7, 1);
+  if (!checkQueryContentResult(tooBigOffsetAsArray, description + "rect array for too big offset") ||
+      !checkRectArray(tooBigOffsetAsArray, [tooBigOffset], description + "query text rect array result with too big offset should match with each query text rect result")) {
+    return;
+  }
+
+  // Note that this case does not have an empty line at the end.
+  contenteditable.innerHTML = "abc<br>def<br>";
+                      // \n    0123   4567
+                      // \r\n  01234  56789
+
+  description = "runTextRectInContentEditableTest: \"" + contenteditable.innerHTML + "\", ";
+
+  // "f"
+  f = synthesizeQueryTextRect(kLFLen + 5, 1);
+  if (!checkQueryContentResult(f, description + "rect for 'f'")) {
+    return;
+  }
+
+  is(f.top, e.top, description + "'e' and 'f' should be at same top");
+  is(f.height, e.height, description + "'e' and 'f' should be same height");
+  isSimilarTo(f.left, e.left + e.width, 2, description + "left of 'f' should be at similar to right of 'e'");
+
+  // 2nd <br> (can be computed with rect of 'f')
+  let br2 = synthesizeQueryTextRect(kLFLen + 6, 1);
+  if (!checkQueryContentResult(br2, description + "rect for 2nd <br>")) {
+    return;
+  }
+
+  is(br2.top, f.top, description + "'f' and a line breaker caused by 2nd <br> should be at same top");
+  is(br2.height, f.height, description + "'f' and a line breaker caused by 2nd <br> should be same height");
+  isSimilarTo(br2.left, f.left + f.width, 2, description + "left of a line breaker caused by 2nd <br> should be similar to right of 'f'");
+
+  // 2nd <br> as array
+  let br2AsArray = synthesizeQueryTextRectArray(kLFLen * 2 + 6, 1);
+  if (!checkQueryContentResult(br2AsArray, description + "2nd <br>'s line breaker as array") ||
+      !checkRectArray(br2AsArray, [br2], description + "query text rect array result of 2nd <br> should match with each query text rect result")) {
+    return;
+  }
+
+  if (kLFLen > 1) {
+    // \n of \r\n
+    let br2_2 = synthesizeQueryTextRect(kLFLen + 7, 1);
+    if (!checkQueryContentResult(br2_2, description + "rect for \\n of \\r\\n caused by 2nd <br>")) {
+      return;
+    }
+
+    is(br2_2.top, br2.top, description + "'\\r' and '\\n' should be at same top");
+    is(br2_2.left, br2.left, description + "'\\r' and '\\n' should be at same top");
+    is(br2_2.height, br2.height, description + "'\\r' and '\\n' should be same height");
+    is(br2_2.width, br2.width, description + "'\\r' and '\\n' should be same width");
+
+    // \n of \r\n as array
+    let br2_2AsArray = synthesizeQueryTextRectArray(kLFLen + 7, 1);
+    if (!checkQueryContentResult(br2_2AsArray, description + "rect array for \\n of \\r\\n caused by 2nd <br>") ||
+        !checkRectArray(br2_2AsArray, [br2_2], description + "query text rect array result of \\n of \\r\\n caused by 2nd <br> should match with each query text rect result")) {
+      return;
+    }
+  }
+
+  // next of 2nd <br>
+  let next_br2 = synthesizeQueryTextRect(kLFLen * 2 + 6, 1);
+  if (!checkQueryContentResult(next_br2, description + "rect for next of 2nd <br>")) {
+    return;
+  }
+
+  is(next_br2.top, br2.top, description + "2nd <br> and next of 2nd <br> should be at same top");
+  is(next_br2.left, br2.left, description + "2nd <br> and next of 2nd <br> should be at same top");
+  is(next_br2.height, br2.height, description + "2nd <br> and next of 2nd <br> should be same height");
+  is(next_br2.width, br2.width, description + "2nd <br> and next of 2nd <br> should be same width");
+
+  // next of 2nd <br> as array
+  let next_br2AsArray = synthesizeQueryTextRectArray(kLFLen * 2 + 6, 1);
+  if (!checkQueryContentResult(next_br2AsArray, description + "rect array for next of 2nd <br>") ||
+      !checkRectArray(next_br2AsArray, [next_br2], description + "query text rect array result of next of 2nd <br> should match with each query text rect result")) {
+    return;
+  }
+
+  // too big offset for the editor
+  tooBigOffset = synthesizeQueryTextRect(kLFLen * 2 + 7, 1);
+  if (!checkQueryContentResult(tooBigOffset, description + "rect for too big offset")) {
+    return;
+  }
+
+  is(tooBigOffset.top, next_br2.top, description + "too big offset and next of 2nd <br> should be at same top");
+  is(tooBigOffset.left, next_br2.left, description + "too big offset and next of 2nd <br> should be at same left");
+  is(tooBigOffset.height, next_br2.height, description + "too big offset and next of 2nd <br> should be same height");
+  is(tooBigOffset.width, next_br2.width, description + "too big offset and next of 2nd <br> should be same width");
+
+  // too big offset for the editors as array
+  tooBigOffsetAsArray = synthesizeQueryTextRectArray(kLFLen * 2 + 7, 1);
+  if (!checkQueryContentResult(tooBigOffsetAsArray, description + "rect array for too big offset") ||
+      !checkRectArray(tooBigOffsetAsArray, [tooBigOffset], description + "query text rect array result with too big offset should match with each query text rect result")) {
+    return;
+  }
+
+  contenteditable.innerHTML = "abc<br>def<br><br>";
+                      // \n    0123   4567   8
+                      // \r\n  01234  56789  01
+
+  description = "runTextRectInContentEditableTest: \"" + contenteditable.innerHTML + "\", ";
+
+  // "f"
+  f = synthesizeQueryTextRect(kLFLen + 5, 1);
+  if (!checkQueryContentResult(f, description + "rect for 'f'")) {
+    return;
+  }
+
+  is(f.top, e.top, description + "'e' and 'f' should be at same top");
+  isSimilarTo(f.left, e.left + e.width, 2, description + "left of 'f' should be at similar to right of 'e'");
+  is(f.height, e.height, description + "'e' and 'f' should be same height");
+
+  // 2nd <br>
+  br2 = synthesizeQueryTextRect(kLFLen + 6, 1);
+  if (!checkQueryContentResult(br2, description + "rect for 2nd <br>")) {
+    return;
+  }
+
+  is(br2.top, f.top, description + "'f' and a line breaker caused by 2nd <br> should be at same top");
+  is(br2.height, f.height, description + "'f' and a line breaker caused by 2nd <br> should be same height");
+  ok(f.left < br2.left, description + "left of a line breaker caused by 2nd <br> should be bigger than left of 'f', f.left=" + f.left + ", br2.left=" + br2.left);
+
+  // 2nd <br> as array
+  br2AsArray = synthesizeQueryTextRectArray(kLFLen + 6, 1);
+  if (!checkQueryContentResult(br2AsArray, description + "2nd <br>'s line breaker as array") ||
+      !checkRectArray(br2AsArray, [br2], description + "query text rect array result of 2nd <br> should match with each query text rect result")) {
+    return;
+  }
+
+  if (kLFLen > 1) {
+    // \n of \r\n
+    let br2_2 = synthesizeQueryTextRect(kLFLen + 7, 1);
+    if (!checkQueryContentResult(br2_2, description + "rect for \\n of \\r\\n caused by 2nd <br>")) {
+      return;
+    }
+
+    is(br2_2.top, br2.top, description + "'\\r' and '\\n' should be at same top");
+    is(br2_2.left, br2.left, description + "'\\r' and '\\n' should be at same top");
+    is(br2_2.height, br2.height, description + "'\\r' and '\\n' should be same height");
+    is(br2_2.width, br2.width, description + "'\\r' and '\\n' should be same width");
+
+    // \n of \r\n as array
+    let br2_2AsArray = synthesizeQueryTextRectArray(kLFLen + 7, 1);
+    if (!checkQueryContentResult(br2_2AsArray, description + "rect array for \\n of \\r\\n caused by 2nd <br>") ||
+        !checkRectArray(br2_2AsArray, [br2_2], description + "query text rect array result of \\n of \\r\\n caused by 2nd <br> should match with each query text rect result")) {
+      return;
+    }
+  }
+
+  // 3rd <br>
+  let br3 = synthesizeQueryTextRect(kLFLen * 2 + 7, 1);
+  if (!checkQueryContentResult(br3, description + "rect for next of 3rd <br>")) {
+    return;
+  }
+
+  isSimilarTo(br3.top, d.top + d.height, 3, description + "top of next of 3rd <br> should at similar to bottom of 'd'");
+  isSimilarTo(br3.left, d.left, 2, description + "left of next of 3rd <br> should be at similar to left of 'd'");
+  isSimilarTo(br3.height, d.height, 2, description + "next of 3rd <br> and 'd' should be similar height");
+
+  // 3rd <br> as array
+  let br3AsArray = synthesizeQueryTextRectArray(kLFLen + 6, 1);
+  if (!checkQueryContentResult(br3AsArray, description + "3rd <br>'s line breaker as array") ||
+      !checkRectArray(br3AsArray, [br3], description + "query text rect array result of 3rd <br> should match with each query text rect result")) {
+    return;
+  }
+
+  if (kLFLen > 1) {
+    // \n of \r\n
+    let br3_2 = synthesizeQueryTextRect(kLFLen * 2 + 7, 1);
+    if (!checkQueryContentResult(br3_2, description + "rect for \\n of \\r\\n caused by 3rd <br>")) {
+      return;
+    }
+
+    is(br3_2.top, br3.top, description + "'\\r' and '\\n' should be at same top");
+    is(br3_2.left, br3.left, description + "'\\r' and '\\n' should be at same left");
+    is(br3_2.height, br3.height, description + "'\\r' and '\\n' should be same height");
+    is(br3_2.width, br3.width, description + "'\\r' and '\\n' should be same width");
+
+    // \n of \r\n as array
+    let br3_2AsArray = synthesizeQueryTextRectArray(kLFLen * 2 + 7, 1);
+    if (!checkQueryContentResult(br3_2AsArray, description + "rect array for \\n of \\r\\n caused by 3rd <br>") ||
+        !checkRectArray(br3_2AsArray, [br3_2], description + "query text rect array result of \\n of \\r\\n caused by 3rd <br> should match with each query text rect result")) {
+      return;
+    }
+  }
+
+  // next of 3rd <br>
+  let next_br3 = synthesizeQueryTextRect(kLFLen * 3 + 6, 1);
+  if (!checkQueryContentResult(next_br3, description + "rect for next of 3rd <br>")) {
+    return;
+  }
+
+  is(next_br3.top, br3.top, description + "3rd <br> and next of 3rd <br> should be at same top");
+  is(next_br3.left, br3.left, description + "3rd <br> and next of 3rd <br> should be at same left");
+  is(next_br3.height, br3.height, description + "3rd <br> and next of 3rd <br> should be same height");
+  is(next_br3.width, br3.width, description + "3rd <br> and next of 3rd <br> should be same width");
+
+  // next of 3rd <br> as array
+  let next_br3AsArray = synthesizeQueryTextRectArray(kLFLen * 3 + 6, 1);
+  if (!checkQueryContentResult(next_br3AsArray, description + "rect array for next of 3rd <br>") ||
+      !checkRectArray(next_br3AsArray, [next_br3], description + "query text rect array result of next of 3rd <br> should match with each query text rect result")) {
+    return;
+  }
+
+  // too big offset for the editor
+  tooBigOffset = synthesizeQueryTextRect(kLFLen * 3 + 7, 1);
+  if (!checkQueryContentResult(tooBigOffset, description + "rect for too big offset")) {
+    return;
+  }
+
+  is(tooBigOffset.top, next_br3.top, description + "too big offset and next of 3rd <br> should be at same top");
+  is(tooBigOffset.left, next_br3.left, description + "too big offset and next of 3rd <br> should be at same left");
+  is(tooBigOffset.height, next_br3.height, description + "too big offset and next of 3rd <br> should be same height");
+  is(tooBigOffset.width, next_br3.width, description + "too big offset and next of 3rd <br> should be same width");
+
+  // too big offset for the editors as array
+  tooBigOffsetAsArray = synthesizeQueryTextRectArray(kLFLen * 2 + 7, 1);
+  if (checkQueryContentResult(tooBigOffsetAsArray, description + "rect array for too big offset")) {
+    checkRectArray(tooBigOffsetAsArray, [tooBigOffset], description + "query text rect array result with too big offset should match with each query text rect result");
+  }
+}
+
+function runCharAtPointTest(aFocusedEditor, aTargetName)
+{
+  aFocusedEditor.value = "This is a test of the\nContent Events";
+                       // 012345678901234567890  12345678901234
+                       // 0         1         2           3
+
+  aFocusedEditor.focus();
+
+  const kNone = -1;
+  const kTestingOffset             = [     0, 10,    20, 21 + kLFLen, 34 + kLFLen];
+  const kLeftSideOffset            = [ kNone,  9,    19,       kNone, 33 + kLFLen];
+  const kRightSideOffset           = [     1, 11, kNone, 22 + kLFLen,       kNone];
+  const kLeftTentativeCaretOffset  = [     0, 10,    20, 21 + kLFLen, 34 + kLFLen];
+  const kRightTentativeCaretOffset = [     1, 11,    21, 22 + kLFLen, 35 + kLFLen];
+
+  let editorRect = synthesizeQueryEditorRect();
+  if (!checkQueryContentResult(editorRect,
+        "runCharAtPointTest (" + aTargetName + "): editorRect")) {
+    return;
+  }
+
+  for (let i = 0; i < kTestingOffset.length; i++) {
+    let textRect = synthesizeQueryTextRect(kTestingOffset[i], 1);
+    if (!checkQueryContentResult(textRect,
+          "runCharAtPointTest (" + aTargetName + "): textRect: i=" + i)) {
+      continue;
+    }
+
+    checkRectContainsRect(textRect, editorRect,
+      "runCharAtPointTest (" + aTargetName +
+      "): the text rect isn't in the editor");
+
+    // Test #1, getting same character rect by the point near the top-left.
+    let charAtPt1 = synthesizeCharAtPoint(textRect.left + 1,
+                                          textRect.top + 1);
+    if (checkQueryContentResult(charAtPt1,
+          "runCharAtPointTest (" + aTargetName + "): charAtPt1: i=" + i)) {
+      ok(!charAtPt1.notFound,
+         "runCharAtPointTest (" + aTargetName + "): charAtPt1 isn't found: i=" + i);
+      if (!charAtPt1.notFound) {
+        is(charAtPt1.offset, kTestingOffset[i],
+           "runCharAtPointTest (" + aTargetName + "): charAtPt1 offset is wrong: i=" + i);
+        checkRect(charAtPt1, textRect, "runCharAtPointTest (" + aTargetName +
+                  "): charAtPt1 left is wrong: i=" + i);
+      }
+      ok(!charAtPt1.tentativeCaretOffsetNotFound,
+         "runCharAtPointTest (" + aTargetName + "): tentative caret offset for charAtPt1 isn't found: i=" + i);
+      if (!charAtPt1.tentativeCaretOffsetNotFound) {
+        is(charAtPt1.tentativeCaretOffset, kLeftTentativeCaretOffset[i],
+           "runCharAtPointTest (" + aTargetName + "): tentative caret offset for charAtPt1 is wrong: i=" + i);
+      }
+    }
+
+    // Test #2, getting same character rect by the point near the bottom-right.
+    let charAtPt2 = synthesizeCharAtPoint(textRect.left + textRect.width - 2,
+                                          textRect.top + textRect.height - 2);
+    if (checkQueryContentResult(charAtPt2,
+          "runCharAtPointTest (" + aTargetName + "): charAtPt2: i=" + i)) {
+      ok(!charAtPt2.notFound,
+         "runCharAtPointTest (" + aTargetName + "): charAtPt2 isn't found: i=" + i);
+      if (!charAtPt2.notFound) {
+        is(charAtPt2.offset, kTestingOffset[i],
+           "runCharAtPointTest (" + aTargetName + "): charAtPt2 offset is wrong: i=" + i);
+        checkRect(charAtPt2, textRect, "runCharAtPointTest (" + aTargetName +
+                  "): charAtPt1 left is wrong: i=" + i);
+      }
+      ok(!charAtPt2.tentativeCaretOffsetNotFound,
+         "runCharAtPointTest (" + aTargetName + "): tentative caret offset for charAtPt2 isn't found: i=" + i);
+      if (!charAtPt2.tentativeCaretOffsetNotFound) {
+        is(charAtPt2.tentativeCaretOffset, kRightTentativeCaretOffset[i],
+           "runCharAtPointTest (" + aTargetName + "): tentative caret offset for charAtPt2 is wrong: i=" + i);
+      }
+    }
+
+    // Test #3, getting left character offset.
+    let charAtPt3 = synthesizeCharAtPoint(textRect.left - 2,
+                                          textRect.top + 1);
+    if (checkQueryContentResult(charAtPt3,
+          "runCharAtPointTest (" + aTargetName + "): charAtPt3: i=" + i)) {
+      is(charAtPt3.notFound, kLeftSideOffset[i] == kNone,
+         kLeftSideOffset[i] == kNone ?
+           "runCharAtPointTest (" + aTargetName + "): charAtPt3 is found: i=" + i :
+           "runCharAtPointTest (" + aTargetName + "): charAtPt3 isn't found: i=" + i);
+      if (!charAtPt3.notFound) {
+        is(charAtPt3.offset, kLeftSideOffset[i],
+           "runCharAtPointTest (" + aTargetName + "): charAtPt3 offset is wrong: i=" + i);
+      }
+      if (kLeftSideOffset[i] == kNone) {
+        // There may be no enough padding-left (depends on platform)
+        todo(false,
+             "runCharAtPointTest (" + aTargetName + "): tentative caret offset for charAtPt3 isn't tested: i=" + i);
+      } else {
+        ok(!charAtPt3.tentativeCaretOffsetNotFound,
+           "runCharAtPointTest (" + aTargetName + "): tentative caret offset for charAtPt3 isn't found: i=" + i);
+        if (!charAtPt3.tentativeCaretOffsetNotFound) {
+          is(charAtPt3.tentativeCaretOffset, kLeftTentativeCaretOffset[i],
+             "runCharAtPointTest (" + aTargetName + "): tentative caret offset for charAtPt3 is wrong: i=" + i);
+        }
+      }
+    }
+
+    // Test #4, getting right character offset.
+    let charAtPt4 = synthesizeCharAtPoint(textRect.left + textRect.width + 1,
+                                          textRect.top + textRect.height - 2);
+    if (checkQueryContentResult(charAtPt4,
+          "runCharAtPointTest (" + aTargetName + "): charAtPt4: i=" + i)) {
+      is(charAtPt4.notFound, kRightSideOffset[i] == kNone,
+         kRightSideOffset[i] == kNone ?
+           "runCharAtPointTest (" + aTargetName + "): charAtPt4 is found: i=" + i :
+           "runCharAtPointTest (" + aTargetName + "): charAtPt4 isn't found: i=" + i);
+      if (!charAtPt4.notFound) {
+        is(charAtPt4.offset, kRightSideOffset[i],
+           "runCharAtPointTest (" + aTargetName + "): charAtPt4 offset is wrong: i=" + i);
+      }
+      ok(!charAtPt4.tentativeCaretOffsetNotFound,
+         "runCharAtPointTest (" + aTargetName + "): tentative caret offset for charAtPt4 isn't found: i=" + i);
+      if (!charAtPt4.tentativeCaretOffsetNotFound) {
+        is(charAtPt4.tentativeCaretOffset, kRightTentativeCaretOffset[i],
+           "runCharAtPointTest (" + aTargetName + "): tentative caret offset for charAtPt4 is wrong: i=" + i);
+      }
+    }
+  }
+}
+
+function runCharAtPointAtOutsideTest()
+{
+  textarea.focus();
+  textarea.value = "some text";
+  let editorRect = synthesizeQueryEditorRect();
+  if (!checkQueryContentResult(editorRect,
+        "runCharAtPointAtOutsideTest: editorRect")) {
+    return;
+  }
+  // Check on a text node which is at the outside of editor.
+  let charAtPt = synthesizeCharAtPoint(editorRect.left + 20,
+                                       editorRect.top - 10);
+  if (checkQueryContentResult(charAtPt,
+        "runCharAtPointAtOutsideTest: charAtPt")) {
+    ok(charAtPt.notFound,
+       "runCharAtPointAtOutsideTest: charAtPt is found on outside of editor");
+    ok(charAtPt.tentativeCaretOffsetNotFound,
+       "runCharAtPointAtOutsideTest: tentative caret offset for charAtPt is found on outside of editor");
+  }
+}
+
+function runSetSelectionEventTest()
+{
+  contenteditable.focus();
+
+  let selection = windowOfContenteditable.getSelection();
+
+  // #1
+  contenteditable.innerHTML = "abc<br>def";
+
+  synthesizeSelectionSet(0, 100);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #1 (0, 100), \"" + contenteditable.innerHTML + "\": selection anchor node should be the first text node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #1 (0, 100), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #1 (0, 100), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node of the editor");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #1 (0, 100), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of children");
+  checkSelection(0, "abc" + kLF + "def", "runSetSelectionEventTest #1 (0, 100), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(2, 2 + kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #1 (2, 2+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the first text node");
+  is(selection.anchorOffset, 2,
+     "runSetSelectionEventTest #1 (2, 2+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 2");
+  is(selection.focusNode, contenteditable.lastChild,
+     "runSetSelectionEventTest #1 (2, 2+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the last text node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #1 (2, 2+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(2, "c" + kLF + "d", "runSetSelectionEventTest #1 (2, 2+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(1, 2);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #1 (1, 2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the first text node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #1 (1, 2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #1 (1, 2), \"" + contenteditable.innerHTML + "\": selection focus node should be the first text node");
+  is(selection.focusOffset, contenteditable.firstChild.wholeText.length,
+     "runSetSelectionEventTest #1 (1, 2), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the text node");
+  checkSelection(1, "bc", "runSetSelectionEventTest #1 (1, 2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(3, kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #1 (3, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the first text node");
+  is(selection.anchorOffset, contenteditable.firstChild.wholeText.length,
+     "runSetSelectionEventTest #1 (3, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the first text node");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #1 (3, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, 2,
+     "runSetSelectionEventTest #1 (3, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be the index of the last text node");
+  checkSelection(3, kLF, "runSetSelectionEventTest #1 (3, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(6+kLFLen, 0);
+  is(selection.anchorNode, contenteditable.lastChild,
+     "runSetSelectionEventTest #1 (6+kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the last text node");
+  is(selection.anchorOffset, contenteditable.lastChild.wholeText.length,
+     "runSetSelectionEventTest #1 (6+kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the last text node");
+  is(selection.focusNode, contenteditable.lastChild,
+     "runSetSelectionEventTest #1 (6+kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the last text node");
+  is(selection.anchorOffset, contenteditable.lastChild.wholeText.length,
+     "runSetSelectionEventTest #1 (6+kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the last text node");
+  checkSelection(6 + kLFLen, "", "runSetSelectionEventTest #1 (6+kLFLen, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(100, 0);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #1 (100, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node of the editor");
+  is(selection.anchorOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #1 (100, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the count of children");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #1 (100, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node of the editor");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #1 (100, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of children");
+  checkSelection(6 + kLFLen, "", "runSetSelectionEventTest #1 (100, 0), \"" + contenteditable.innerHTML + "\"");
+
+  // #2
+  contenteditable.innerHTML = "<p>a<b>b</b>c</p><p>def</p>";
+
+  synthesizeSelectionSet(kLFLen, 4+kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #2 (kLFLen, 4+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the first <p> node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #2 (kLFLen, 4+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the index of the first <p> node");
+  is(selection.focusNode, contenteditable.lastChild.firstChild,
+     "runSetSelectionEventTest #2 (kLFLen, 4+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node in the second <p> node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #2 (kLFLen, 4+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(kLFLen, "abc" + kLF + "d", "runSetSelectionEventTest #2 (kLFLen, 4+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen, 2);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #2 (kLFLen, 2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the first <p> node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #2 (kLFLen, 2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the index of the first <p> node");
+  is(selection.focusNode, contenteditable.firstChild.childNodes.item(1).firstChild,
+     "runSetSelectionEventTest #2 (kLFLen, 2), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node in the <b> node");
+  is(selection.focusOffset, contenteditable.firstChild.childNodes.item(1).firstChild.wholeText.length,
+     "runSetSelectionEventTest #2 (kLFLen, 2), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the text node in the <b> node");
+  checkSelection(kLFLen, "ab", "runSetSelectionEventTest #2 (kLFLen, 2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(1+kLFLen, 2);
+  is(selection.anchorNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #2 (1+kLFLen, 2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the first text node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #2 (1+kLFLen, 2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable.firstChild.lastChild,
+     "runSetSelectionEventTest #2 (1+kLFLen, 2), \"" + contenteditable.innerHTML + "\": selection focus node should be the last text node in the first <p> node");
+  is(selection.focusOffset, contenteditable.firstChild.lastChild.wholeText.length,
+     "runSetSelectionEventTest #2 (1+kLFLen, 2), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the last text node in the first <p> node");
+  checkSelection(1+kLFLen, "bc", "runSetSelectionEventTest #2 (1+kLFLen, 2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(2+kLFLen, 2+kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild.childNodes.item(1).firstChild,
+     "runSetSelectionEventTest #2 (2+kLFLen, 2+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the text node in the <b> node");
+  is(selection.anchorOffset, contenteditable.firstChild.childNodes.item(1).firstChild.wholeText.length,
+     "runSetSelectionEventTest #2 (2+kLFLen, 2+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the text node in the <b> node");
+  is(selection.focusNode, contenteditable.lastChild.firstChild,
+     "runSetSelectionEventTest #2 (2+kLFLen, 2+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node in the last <p> node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #2 (2+kLFLen, 2+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(2+kLFLen, "c" + kLF + "d", "runSetSelectionEventTest #2 (2+kLFLen, 2+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(3+kLFLen*2, 1);
+  is(selection.anchorNode, contenteditable.lastChild,
+     "runSetSelectionEventTest #2 (3+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection anchor node should be the second <p> node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #2 (3+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the index of the second <p> node");
+  is(selection.focusNode, contenteditable.lastChild.firstChild,
+     "runSetSelectionEventTest #2 (3+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node in the second <p> node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #2 (3+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(3+kLFLen*2, "d", "runSetSelectionEventTest #2 (3+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, 0);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #2 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #2 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #2 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #2 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, "", "runSetSelectionEventTest #2 (0, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, kLFLen);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #2 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #2 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the index of the first <p> node");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #2 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the first <p> node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #2 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, kLF, "runSetSelectionEventTest #2 (0, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(2+kLFLen, 1+kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild.childNodes.item(1).firstChild,
+     "runSetSelectionEventTest #2 (2+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the last text node of the <b> node");
+  is(selection.anchorOffset, contenteditable.firstChild.childNodes.item(1).firstChild.wholeText.length,
+     "runSetSelectionEventTest #2 (2+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the last text node of the first <b> node");
+  is(selection.focusNode, contenteditable.lastChild,
+     "runSetSelectionEventTest #2 (2+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the second <p> node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #2 (2+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(2+kLFLen, "c" + kLF, "runSetSelectionEventTest #2 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(3+kLFLen, kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild.lastChild,
+     "runSetSelectionEventTest #2 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the last text node of the first <p> node");
+  is(selection.anchorOffset, contenteditable.firstChild.lastChild.wholeText.length,
+     "runSetSelectionEventTest #2 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the last text node of the first <p> node");
+  is(selection.focusNode, contenteditable.lastChild,
+     "runSetSelectionEventTest #2 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the second <p> node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #2 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(3+kLFLen, kLF, "runSetSelectionEventTest #2 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(3+kLFLen, 1+kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild.lastChild,
+     "runSetSelectionEventTest #2 (3+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the last text node of the first <p> node");
+  is(selection.anchorOffset, contenteditable.firstChild.lastChild.wholeText.length,
+     "runSetSelectionEventTest #2 (3+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the last text node of the first <p> node");
+  is(selection.focusNode, contenteditable.lastChild.firstChild,
+     "runSetSelectionEventTest #2 (3+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node of the second <p> node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #2 (3+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(3+kLFLen, kLF + "d", "runSetSelectionEventTest #2 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  // #3
+  contenteditable.innerHTML = "<div>abc<p>def</p></div>";
+
+  synthesizeSelectionSet(1+kLFLen, 2);
+  is(selection.anchorNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #3 (1+kLFLen, 2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the first text node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #3 (1+kLFLen, 2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #3 (1+kLFLen, 2), \"" + contenteditable.innerHTML + "\": selection focus node should be the first text node");
+  is(selection.focusOffset, contenteditable.firstChild.firstChild.wholeText.length,
+     "runSetSelectionEventTest #3 (1+kLFLen, 2), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the first text node");
+  checkSelection(1+kLFLen, "bc", "runSetSelectionEventTest #3 (1+kLFLen, 2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(1+kLFLen, 3+kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #3 (1+kLFLen, 3+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the first text node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #3 (1+kLFLen, 3+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable.firstChild.lastChild.firstChild,
+     "runSetSelectionEventTest #3 (1+kLFLen, 3+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node in the <p> node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #3 (1+kLFLen, 3+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(1+kLFLen, "bc" + kLF + "d", "runSetSelectionEventTest #3 (1+kLFLen, 3+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(3+kLFLen, 0);
+  is(selection.anchorNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #3 (3+kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the first text node");
+  is(selection.anchorOffset, contenteditable.firstChild.firstChild.wholeText.length,
+     "runSetSelectionEventTest #3 (3+kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the first text node");
+  is(selection.focusNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #3 (3+kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the first text node");
+  is(selection.focusOffset, contenteditable.firstChild.firstChild.wholeText.length,
+     "runSetSelectionEventTest #3 (3+kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the first text node");
+  checkSelection(3+kLFLen, "", "runSetSelectionEventTest #3 (3+kLFLen, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, 6+kLFLen*2);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #3 (0, 6+kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #3 (0, 6+kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.firstChild.lastChild.firstChild,
+     "runSetSelectionEventTest #3 (0, 6+kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus node should be the last text node");
+  is(selection.focusOffset, contenteditable.firstChild.lastChild.firstChild.wholeText.length,
+     "runSetSelectionEventTest #3 (0, 6+kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the last text node");
+  checkSelection(0, kLF + "abc" + kLF + "def", "runSetSelectionEventTest #3 (0, 6+kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, 100);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #3 (0, 100), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #3 (0, 100), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #3 (0, 100), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #3 (0, 100), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(0, kLF + "abc" + kLF + "def", "runSetSelectionEventTest #3 (0, 100), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(4+kLFLen*2, 2);
+  is(selection.anchorNode, contenteditable.firstChild.lastChild.firstChild,
+     "runSetSelectionEventTest #3 (4+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the last text node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #3 (4+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable.firstChild.lastChild.firstChild,
+     "runSetSelectionEventTest #3 (4+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\": selection focus node should be the last text node");
+  is(selection.focusOffset, contenteditable.firstChild.lastChild.firstChild.wholeText.length,
+     "runSetSelectionEventTest #3 (4+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the last text node");
+  checkSelection(4+kLFLen*2, "ef", "runSetSelectionEventTest #3 (4+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(4+kLFLen*2, 100);
+  is(selection.anchorNode, contenteditable.firstChild.lastChild.firstChild,
+     "runSetSelectionEventTest #3 (4+kLFLen*2, 100), \"" + contenteditable.innerHTML + "\": selection anchor node should be the last text node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #3 (4+kLFLen*2, 100), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #3 (4+kLFLen*2, 100), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #3 (4+kLFLen*2, 100), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(4+kLFLen*2, "ef", "runSetSelectionEventTest #3 (4+kLFLen*2, 100), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(6+kLFLen*2, 0);
+  is(selection.anchorNode, contenteditable.firstChild.lastChild.firstChild,
+     "runSetSelectionEventTest #3 (6+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the last text node");
+  is(selection.anchorOffset, contenteditable.firstChild.lastChild.firstChild.wholeText.length,
+     "runSetSelectionEventTest #3 (6+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the last text node");
+  is(selection.focusNode, contenteditable.firstChild.lastChild.firstChild,
+     "runSetSelectionEventTest #3 (6+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the last text node");
+  is(selection.focusOffset, contenteditable.firstChild.lastChild.firstChild.wholeText.length,
+     "runSetSelectionEventTest #3 (6+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the last text node");
+  checkSelection(6+kLFLen*2, "", "runSetSelectionEventTest #3 (6+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(6+kLFLen*2, 1);
+  is(selection.anchorNode, contenteditable.firstChild.lastChild.firstChild,
+     "runSetSelectionEventTest #3 (6+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection anchor node should be the last text node");
+  is(selection.anchorOffset, contenteditable.firstChild.lastChild.firstChild.wholeText.length,
+     "runSetSelectionEventTest #3 (6+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the last text node");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #3 (6+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #3 (6+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(6+kLFLen*2, "", "runSetSelectionEventTest #3 (6+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, kLFLen);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #3 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #3 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the index of the first text node");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #3 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the <div> node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #3 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, kLF, "runSetSelectionEventTest #3 (0, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, 1+kLFLen);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #3 (0, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #3 (0, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the index of the <div> node");
+  is(selection.focusNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #3 (0, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the first text node of the <div> node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #3 (0, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(0, kLF + "a", "runSetSelectionEventTest #3 (0, 1+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(2+kLFLen, 1+kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #3 (2+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the text node of the <div> node");
+  is(selection.anchorOffset, 2,
+     "runSetSelectionEventTest #3 (2+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 2");
+  is(selection.focusNode, contenteditable.firstChild.lastChild,
+     "runSetSelectionEventTest #3 (2+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #3 (2+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(2+kLFLen, "c" + kLF, "runSetSelectionEventTest #3 (2+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(3+kLFLen, kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #3 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the text node of the <div> node");
+  is(selection.anchorOffset, contenteditable.firstChild.firstChild.wholeText.length,
+     "runSetSelectionEventTest #3 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the text node of the <div> node");
+  is(selection.focusNode, contenteditable.firstChild.lastChild,
+     "runSetSelectionEventTest #3 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #3 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(3+kLFLen, kLF, "runSetSelectionEventTest #3 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(3+kLFLen, 1+kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #3 (3+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the text node of the <div> node");
+  is(selection.anchorOffset, contenteditable.firstChild.firstChild.wholeText.length,
+     "runSetSelectionEventTest #3 (3+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the text node of the <div> node");
+  is(selection.focusNode, contenteditable.firstChild.lastChild.firstChild,
+     "runSetSelectionEventTest #3 (3+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node of the <p> node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #3 (3+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(3+kLFLen, kLF + "d", "runSetSelectionEventTest #3 (3+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  // #4
+  contenteditable.innerHTML = "<div><p>abc</p>def</div>";
+
+  synthesizeSelectionSet(1+kLFLen*2, 2);
+  is(selection.anchorNode, contenteditable.firstChild.firstChild.firstChild,
+     "runSetSelectionEventTest #4 (1+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the text node in the <p> node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #4 (1+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable.firstChild.firstChild.firstChild,
+     "runSetSelectionEventTest #4 (1+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node in the <p> node");
+  is(selection.focusOffset, contenteditable.firstChild.firstChild.firstChild.wholeText.length,
+     "runSetSelectionEventTest #4 (1+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the text node in the <p> node");
+  checkSelection(1+kLFLen*2, "bc", "runSetSelectionEventTest #4 (1+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(1+kLFLen*2, 3);
+  is(selection.anchorNode, contenteditable.firstChild.firstChild.firstChild,
+     "runSetSelectionEventTest #4 (1+kLFLen*2, 3), \"" + contenteditable.innerHTML + "\": selection anchor node should be the text node in the <p> node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #4 (1+kLFLen*2, 3), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable.firstChild.lastChild,
+     "runSetSelectionEventTest #4 (1+kLFLen*2, 3), \"" + contenteditable.innerHTML + "\": selection focus node should be the last text node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #4 (1+kLFLen*2, 3), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(1+kLFLen*2, "bcd", "runSetSelectionEventTest #4 (1+kLFLen*2, 3), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(3+kLFLen*2, 0);
+  is(selection.anchorNode, contenteditable.firstChild.firstChild.firstChild,
+     "runSetSelectionEventTest #4 (3+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the text node in the <p> node");
+  is(selection.anchorOffset, contenteditable.firstChild.firstChild.firstChild.wholeText.length,
+     "runSetSelectionEventTest #4 (3+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the text node in the <p> node");
+  is(selection.focusNode, contenteditable.firstChild.firstChild.firstChild,
+     "runSetSelectionEventTest #4 (3+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node in the <p> node");
+  is(selection.focusOffset, contenteditable.firstChild.firstChild.firstChild.wholeText.length,
+     "runSetSelectionEventTest #4 (3+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the text node in the <p> node");
+  checkSelection(3+kLFLen*2, "", "runSetSelectionEventTest #4 (3+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, 6+kLFLen*2);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #4 (0, 6+kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #4 (0, 6+kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.firstChild.lastChild,
+     "runSetSelectionEventTest #4 (0, 6+kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus node should be the last text node");
+  is(selection.focusOffset, contenteditable.firstChild.lastChild.wholeText.length,
+     "runSetSelectionEventTest #4 (0, 6+kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the last text node");
+  checkSelection(0, kLF + kLF + "abcdef", "runSetSelectionEventTest #4 (0, 6+kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, 100);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #4 (0, 100), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #4 (0, 100), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #4 (0, 100), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #4 (0, 100), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(0, kLF + kLF + "abcdef", "runSetSelectionEventTest #4 (0, 100), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(4+kLFLen*2, 2);
+  is(selection.anchorNode, contenteditable.firstChild.lastChild,
+     "runSetSelectionEventTest #4 (4+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the last text node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #4 (4+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable.firstChild.lastChild,
+     "runSetSelectionEventTest #4 (4+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\": selection focus node should be the last text node");
+  is(selection.focusOffset, contenteditable.firstChild.lastChild.wholeText.length,
+     "runSetSelectionEventTest #4 (4+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the last text node");
+  checkSelection(4+kLFLen*2, "ef", "runSetSelectionEventTest #4 (4+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(4+kLFLen*2, 100);
+  is(selection.anchorNode, contenteditable.firstChild.lastChild,
+     "runSetSelectionEventTest #4 (4+kLFLen*2, 100), \"" + contenteditable.innerHTML + "\": selection anchor node should be the last text node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #4 (4+kLFLen*2, 100), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #4 (4+kLFLen*2, 100), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #4 (4+kLFLen*2, 100), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(4+kLFLen*2, "ef", "runSetSelectionEventTest #4 (4+kLFLen*2, 100), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(6+kLFLen*2, 0);
+  is(selection.anchorNode, contenteditable.firstChild.lastChild,
+     "runSetSelectionEventTest #4 (6+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the last text node");
+  is(selection.anchorOffset, contenteditable.firstChild.lastChild.wholeText.length,
+     "runSetSelectionEventTest #4 (6+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the last text node");
+  is(selection.focusNode, contenteditable.firstChild.lastChild,
+     "runSetSelectionEventTest #4 (6+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the last text node");
+  is(selection.focusOffset, contenteditable.firstChild.lastChild.wholeText.length,
+     "runSetSelectionEventTest #4 (6+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the last text node");
+  checkSelection(6+kLFLen*2, "", "runSetSelectionEventTest #4 (6+kLFLen*2, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(6+kLFLen*2, 1);
+  is(selection.anchorNode, contenteditable.firstChild.lastChild,
+     "runSetSelectionEventTest #4 (6+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection anchor node should be the last text node");
+  is(selection.anchorOffset, contenteditable.firstChild.lastChild.wholeText.length,
+     "runSetSelectionEventTest #4 (6+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the length of the last text node");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #4 (6+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #4 (6+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(6+kLFLen*2, "", "runSetSelectionEventTest #4 (6+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, kLFLen);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #4 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #4 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the index of the <div> node");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #4 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the <div> node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #4 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, kLF, "runSetSelectionEventTest #4 (0, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, kLFLen*2);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #4 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #4 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the index of the <div> node");
+  is(selection.focusNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #4 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #4 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, kLF + kLF, "runSetSelectionEventTest #4 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, 1+kLFLen*2);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #4 (0, 1+kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #4 (0, 1+kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the index of the <div> node");
+  is(selection.focusNode, contenteditable.firstChild.firstChild.firstChild,
+     "runSetSelectionEventTest #4 (0, 1+kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node in the <p> node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #4 (0, 1+kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(0, kLF + kLF + "a", "runSetSelectionEventTest #4 (0, 1+kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen, 0);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #4 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the <div> node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #4 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #4 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the <div> node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #4 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(kLFLen, "", "runSetSelectionEventTest #4 (kLFLen, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen, kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #4 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the <div> node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #4 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the index of the <p> node");
+  is(selection.focusNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #4 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #4 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(kLFLen, kLF, "runSetSelectionEventTest #4 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen, 1+kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #4 (kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the <div> node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #4 (kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the index of the <p> node");
+  is(selection.focusNode, contenteditable.firstChild.firstChild.firstChild,
+     "runSetSelectionEventTest #4 (kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node in the <p> node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #4 (kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(kLFLen, kLF +"a", "runSetSelectionEventTest #4 (kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  // #5
+  contenteditable.innerHTML = "<br>";
+
+  synthesizeSelectionSet(0, 0);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #5 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #5 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #5 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #5 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, "", "runSetSelectionEventTest #5 (0, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, kLFLen);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #5 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #5 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #5 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #5 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(0, kLF, "runSetSelectionEventTest #5 (0, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen, 0);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #5 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #5 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the count of the root's children");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #5 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #5 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(kLFLen, "", "runSetSelectionEventTest #5 (kLFLen, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen, 1);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #5 (kLFLen, 1), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #5 (kLFLen, 1), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the count of the root's children");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #5 (kLFLen, 1), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #5 (kLFLen, 1), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(kLFLen, "", "runSetSelectionEventTest #5 (kLFLen, 1), \"" + contenteditable.innerHTML + "\"");
+
+  // #6
+  contenteditable.innerHTML = "<p><br></p>";
+
+  synthesizeSelectionSet(kLFLen, kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #6 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the <p> node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #6 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #6 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, contenteditable.firstChild.childNodes.length,
+     "runSetSelectionEventTest #6 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the <p>'s children");
+  checkSelection(kLFLen, kLF, "runSetSelectionEventTest #6 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen*2, 0);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #6 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the <p> node");
+  is(selection.anchorOffset, contenteditable.firstChild.childNodes.length,
+     "runSetSelectionEventTest #6 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the count of the <p>'s children");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #6 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, contenteditable.firstChild.childNodes.length,
+     "runSetSelectionEventTest #6 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the <p>'s children");
+  checkSelection(kLFLen*2, "", "runSetSelectionEventTest #6 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen*2, 1);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #6 (kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection anchor node should be the <p> node");
+  is(selection.anchorOffset, contenteditable.firstChild.childNodes.length,
+     "runSetSelectionEventTest #6 (kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the count of the root's children");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #6 (kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #6 (kLFLen*2, 1), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(kLFLen*2, "", "runSetSelectionEventTest #6 (kLFLen*2, 1), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, kLFLen);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #6 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #6 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #6 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #6 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, kLF, "runSetSelectionEventTest #6 (0, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, kLFLen*2);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #6 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #6 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #6 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, contenteditable.firstChild.childNodes.length,
+     "runSetSelectionEventTest #6 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the <p>'s children");
+  checkSelection(0, kLF + kLF, "runSetSelectionEventTest #6 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen, 0);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #6 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the <p> node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #6 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #6 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #6 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(kLFLen, "", "runSetSelectionEventTest #6 (kLFLen, 0), \"" + contenteditable.innerHTML + "\"");
+
+  // #7
+  contenteditable.innerHTML = "<br><br>";
+
+  synthesizeSelectionSet(0, kLFLen);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #7 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #7 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #7 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #7 (0, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(0, kLF, "runSetSelectionEventTest #7 (0, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, kLFLen * 2);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #7 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #7 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #7 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #7 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(0, kLF + kLF, "runSetSelectionEventTest #7 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen, 0);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #7 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #7 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #7 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #7 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(kLFLen, "", "runSetSelectionEventTest #7 (kLFLen, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen, kLFLen);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #7 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #7 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #7 (kLFLen, kLFLen) selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #7 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(kLFLen, kLF, "runSetSelectionEventTest #7 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen * 2, 0);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #7 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #7 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the count of the root's children");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #7 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #7 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(kLFLen * 2, "", "runSetSelectionEventTest #7 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\"");
+
+  // #8
+  contenteditable.innerHTML = "<p><br><br></p>";
+
+  synthesizeSelectionSet(kLFLen, kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #8 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the <p> node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #8 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #8 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #8 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(kLFLen, kLF, "runSetSelectionEventTest #7 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen, kLFLen * 2);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #8 (kLFLen, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor node should be the <p> node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #8 (kLFLen, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #8 (kLFLen, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, contenteditable.firstChild.childNodes.length,
+     "runSetSelectionEventTest #8 (kLFLen, kLFLen*2), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the <p>'s children");
+  checkSelection(kLFLen, kLF + kLF, "runSetSelectionEventTest #8 (kLFLen, kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen*2, 0);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #8 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the <p> node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #8 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #8 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #8 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be 1");
+  checkSelection(kLFLen*2, "", "runSetSelectionEventTest #8 (kLFLen*2, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen*2, kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #8 (kLFLen*2, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the <p> node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #8 (kLFLen*2, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #8 (kLFLen*2, kLFLen) selection focus node should be the <p> node");
+  is(selection.focusOffset, contenteditable.firstChild.childNodes.length,
+     "runSetSelectionEventTest #8 (kLFLen*2, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the <p>'s children");
+  checkSelection(kLFLen*2, kLF, "runSetSelectionEventTest #8 (kLFLen*2, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen*3, 0);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #8 (kLFLen*3, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the <p> node");
+  is(selection.anchorOffset, contenteditable.firstChild.childNodes.length,
+     "runSetSelectionEventTest #8 (kLFLen*3, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the count of the <p>'s children");
+  is(selection.focusNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #8 (kLFLen*3, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, contenteditable.firstChild.childNodes.length,
+     "runSetSelectionEventTest #8 (kLFLen*3, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the <p>'s children");
+  checkSelection(kLFLen*3, "", "runSetSelectionEventTest #8 (kLFLen*3, 0), \"" + contenteditable.innerHTML + "\"");
+
+  // #9 (ContentEventHandler cannot distinguish if <p> can have children, so, the result is same as case #5, "<br>")
+  contenteditable.innerHTML = "<p></p>";
+
+  synthesizeSelectionSet(kLFLen, 0);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #9 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #9 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the index of the <p> node + 1");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #9 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the <p> node");
+  is(selection.focusOffset, 1,
+     "runSetSelectionEventTest #9 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be the index of the <p> node + 1");
+  checkSelection(kLFLen, "", "runSetSelectionEventTest #9 (kLFLen, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(kLFLen, 1);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #9 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #9 (kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be the index of the <p> node + 1");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #9 (kLFLen, 1), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #9 (kLFLen, 1), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(kLFLen, "", "runSetSelectionEventTest #9 (kLFLen, 0), \"" + contenteditable.innerHTML + "\"");
+
+  // #10
+  contenteditable.innerHTML = "";
+
+  synthesizeSelectionSet(0, 0);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #10 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #10 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #10 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #10 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, "", "runSetSelectionEventTest #10 (0, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, 1);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #10 (0, 1), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #10 (0, 1), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #10 (0, 1), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #10 (0, 1), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, "", "runSetSelectionEventTest #10 (0, 1), \"" + contenteditable.innerHTML + "\"");
+
+  // #11
+  contenteditable.innerHTML = "<span></span><i><u></u></i>";
+
+  synthesizeSelectionSet(0, 0);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #11 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #11 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #11 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #11 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, "", "runSetSelectionEventTest #11 (0, 0), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(0, 1);
+  is(selection.anchorNode, contenteditable,
+     "runSetSelectionEventTest #11 (0, 1), \"" + contenteditable.innerHTML + "\": selection anchor node should be the root node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #11 (0, 1), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable,
+     "runSetSelectionEventTest #11 (0, 1), \"" + contenteditable.innerHTML + "\": selection focus node should be the root node");
+  is(selection.focusOffset, contenteditable.childNodes.length,
+     "runSetSelectionEventTest #11 (0, 1), \"" + contenteditable.innerHTML + "\": selection focus offset should be the count of the root's children");
+  checkSelection(0, "", "runSetSelectionEventTest #11 (0, 1), \"" + contenteditable.innerHTML + "\"");
+
+  // #12
+  contenteditable.innerHTML = "<span>abc</span><i><u></u></i>";
+
+  synthesizeSelectionSet(0, 0);
+  is(selection.anchorNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #12 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the text node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #12 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.firstChild.firstChild,
+     "runSetSelectionEventTest #12 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #12 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, "", "runSetSelectionEventTest #12 (0, 0), \"" + contenteditable.innerHTML + "\"");
+
+  // #13
+  contenteditable.innerHTML = "<span></span><i>abc<u></u></i>";
+
+  synthesizeSelectionSet(0, 0);
+  is(selection.anchorNode, contenteditable.childNodes.item(1).firstChild,
+     "runSetSelectionEventTest #13 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the text node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #13 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.childNodes.item(1).firstChild,
+     "runSetSelectionEventTest #13 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #13 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, "", "runSetSelectionEventTest #13 (0, 0), \"" + contenteditable.innerHTML + "\"");
+
+  // #14
+  contenteditable.innerHTML = "<span></span><i><u>abc</u></i>";
+
+  synthesizeSelectionSet(0, 0);
+  is(selection.anchorNode, contenteditable.childNodes.item(1).firstChild.firstChild,
+     "runSetSelectionEventTest #14 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the text node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #14 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.childNodes.item(1).firstChild.firstChild,
+     "runSetSelectionEventTest #14 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #14 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, "", "runSetSelectionEventTest #14 (0, 0), \"" + contenteditable.innerHTML + "\"");
+
+  // #15
+  contenteditable.innerHTML = "<span></span><i><u></u>abc</i>";
+
+  synthesizeSelectionSet(0, 0);
+  is(selection.anchorNode, contenteditable.childNodes.item(1).lastChild,
+     "runSetSelectionEventTest #15 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the text node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #15 (0, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.childNodes.item(1).lastChild,
+     "runSetSelectionEventTest #15 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the text node");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #15 (0, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(0, "", "runSetSelectionEventTest #15 (0, 0), \"" + contenteditable.innerHTML + "\"");
+
+  // #16
+  contenteditable.innerHTML = "a<blink>b</blink>c";
+  synthesizeSelectionSet(0, 3);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #16 (0, 3), \"" + contenteditable.innerHTML + "\": selection anchor node should be the first text node");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #16 (0, 3), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.lastChild,
+     "runSetSelectionEventTest #16 (0, 3), \"" + contenteditable.innerHTML + "\": selection focus node should be the last text node");
+  is(selection.focusOffset, contenteditable.lastChild.wholeText.length,
+     "runSetSelectionEventTest #16 (0, 3), \"" + contenteditable.innerHTML + "\": selection focus offset should be the length of the last text node");
+  checkSelection(0, "abc", "runSetSelectionEventTest #16 (0, 3), \"" + contenteditable.innerHTML + "\"");
+
+  // #17 (bug 1319660 - incorrect adjustment of content iterator last node)
+  contenteditable.innerHTML = "<div>a</div><div><br></div>";
+
+  synthesizeSelectionSet(kLFLen, 1+kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #17 (kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the first <div> element");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #17 (kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.lastChild,
+     "runSetSelectionEventTest #17 (kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the second <div> element");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #17 (kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(kLFLen, "a" + kLF, "runSetSelectionEventTest #17 (kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  synthesizeSelectionSet(1+2*kLFLen, 0);
+  is(selection.anchorNode, contenteditable.lastChild,
+     "runSetSelectionEventTest #17 (1+2*kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor node should be the second <div> element");
+  is(selection.anchorOffset, 0,
+     "runSetSelectionEventTest #17 (1+2*kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 0");
+  is(selection.focusNode, contenteditable.lastChild,
+     "runSetSelectionEventTest #17 (1+2*kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus node should be the second <div> element");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #17 (1+2*kLFLen, 0), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(1+2*kLFLen, "", "runSetSelectionEventTest #17 (1+2*kLFLen, 0), \"" + contenteditable.innerHTML + "\"");
+
+  // #18 (bug 1319660 - content iterator start node regression)
+  contenteditable.innerHTML = "<div><br></div><div><br></div>";
+
+  synthesizeSelectionSet(2*kLFLen, kLFLen);
+  is(selection.anchorNode, contenteditable.firstChild,
+     "runSetSelectionEventTest #18 (2*kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor node should be the first <div> element");
+  is(selection.anchorOffset, 1,
+     "runSetSelectionEventTest #18 (2*kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection anchor offset should be 1");
+  is(selection.focusNode, contenteditable.lastChild,
+     "runSetSelectionEventTest #18 (2*kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus node should be the second <div> element");
+  is(selection.focusOffset, 0,
+     "runSetSelectionEventTest #18 (2*kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\": selection focus offset should be 0");
+  checkSelection(2*kLFLen, kLF, "runSetSelectionEventTest #18 (2*kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+}
+
+function runQueryTextContentEventTest()
+{
+  contenteditable.focus();
+
+  let result;
+
+  // #1
+  contenteditable.innerHTML = "abc<br>def";
+
+  result = synthesizeQueryTextContent(0, 6 + kLFLen);
+  is(result.text, "abc" + kLF + "def", "runQueryTextContentEventTest #1 (0, 6+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, 100);
+  is(result.text, "abc" + kLF + "def", "runQueryTextContentEventTest #1 (0, 100), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(2, 2 + kLFLen);
+  is(result.text, "c" + kLF + "d", "runQueryTextContentEventTest #1 (2, 2+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(1, 2);
+  is(result.text, "bc", "runQueryTextContentEventTest #1 (1, 2), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(3, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #1 (3, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(6 + kLFLen, 1);
+  is(result.text, "", "runQueryTextContentEventTest #1 (6 + kLFLen, 0), \"" + contenteditable.innerHTML + "\"");
+
+  // #2
+  contenteditable.innerHTML = "<p>a<b>b</b>c</p><p>def</p>";
+
+  result = synthesizeQueryTextContent(kLFLen, 4+kLFLen);
+  is(result.text, "abc" + kLF + "d", "runQueryTextContentEventTest #2 (kLFLen, 4+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(kLFLen, 2);
+  is(result.text, "ab", "runQueryTextContentEventTest #2 (kLFLen, 2), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(1+kLFLen, 2);
+  is(result.text, "bc", "runQueryTextContentEventTest #2 (1+kLFLen, 2), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(2+kLFLen, 2+kLFLen);
+  is(result.text, "c" + kLF + "d", "runQueryTextContentEventTest #2 (2+kLFLen, 2+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(3+kLFLen*2, 1);
+  is(result.text, "d", "runQueryTextContentEventTest #2 (3+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #2 (0, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(2+kLFLen, 1+kLFLen);
+  is(result.text, "c" + kLF, "runQueryTextContentEventTest #2 (2+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(3+kLFLen, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #2 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(3+kLFLen, 1+kLFLen);
+  is(result.text, kLF + "d", "runQueryTextContentEventTest #2 (3+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  // #3
+  contenteditable.innerHTML = "<div>abc<p>def</p></div>";
+
+  result = synthesizeQueryTextContent(1+kLFLen, 2);
+  is(result.text, "bc", "runQueryTextContentEventTest #3 (1+kLFLen, 2), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(1+kLFLen, 3+kLFLen);
+  is(result.text, "bc" + kLF + "d", "runQueryTextContentEventTest #3 (1+kLFLen, 3+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(3+kLFLen*2, 1);
+  is(result.text, "d", "runQueryTextContentEventTest #3 (3+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, 6+kLFLen*2);
+  is(result.text, kLF + "abc" + kLF + "def", "runQueryTextContentEventTest #3 (0, 6+kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, 100);
+  is(result.text, kLF + "abc" + kLF + "def", "runQueryTextContentEventTest #3 (0, 100), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(4+kLFLen*2, 2);
+  is(result.text, "ef", "runQueryTextContentEventTest #3 (4+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(4+kLFLen*2, 100);
+  is(result.text, "ef", "runQueryTextContentEventTest #3 (4+kLFLen*2, 100), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(6+kLFLen*2, 1);
+  is(result.text, "", "runQueryTextContentEventTest #3 (6+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #3 (0, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, 1+kLFLen);
+  is(result.text, kLF + "a", "runQueryTextContentEventTest #3 (0, 1+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(2+kLFLen, 1+kLFLen);
+  is(result.text, "c" + kLF, "runQueryTextContentEventTest #3 (2+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(3+kLFLen, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #3 (3+kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(3+kLFLen, 1+kLFLen);
+  is(result.text, kLF + "d", "runQueryTextContentEventTest #3 (3+kLFLen, 1+kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  // #4
+  contenteditable.innerHTML = "<div><p>abc</p>def</div>";
+
+  result = synthesizeQueryTextContent(1+kLFLen*2, 2);
+  is(result.text, "bc", "runQueryTextContentEventTest #4 (1+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(1+kLFLen*2, 3);
+  is(result.text, "bcd", "runQueryTextContentEventTest #4 (1+kLFLen*2, 3), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(3+kLFLen*2, 1);
+  is(result.text, "d", "runQueryTextContentEventTest #4 (3+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, 6+kLFLen*2);
+  is(result.text, kLF + kLF + "abcdef", "runQueryTextContentEventTest #4 (0, 6+kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, 100);
+  is(result.text, kLF + kLF + "abcdef", "runQueryTextContentEventTest #4 (0, 100), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(4+kLFLen*2, 2);
+  is(result.text, "ef", "runQueryTextContentEventTest #4 (4+kLFLen*2, 2), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(4+kLFLen*2, 100);
+  is(result.text, "ef", "runQueryTextContentEventTest #4 (4+kLFLen*2, 100), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(6+kLFLen*2, 1);
+  is(result.text, "", "runQueryTextContentEventTest #4 (6+kLFLen*2, 1), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #4 (0, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, kLFLen*2);
+  is(result.text, kLF + kLF, "runQueryTextContentEventTest #4 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, 1+kLFLen*2);
+  is(result.text, kLF + kLF + "a", "runQueryTextContentEventTest #4 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(kLFLen, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #4 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(kLFLen, 1+kLFLen);
+  is(result.text, kLF + "a", "runQueryTextContentEventTest #4 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  // #5
+  contenteditable.innerHTML = "<br>";
+
+  result = synthesizeQueryTextContent(0, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #5 (0, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(kLFLen, 1);
+  is(result.text, "", "runQueryTextContentEventTest #5 (kLFLen, 1), \"" + contenteditable.innerHTML + "\"");
+
+  // #6
+  contenteditable.innerHTML = "<p><br></p>";
+
+  result = synthesizeQueryTextContent(kLFLen, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #6 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(kLFLen*2, 1);
+  is(result.text, "", "runQueryTextContentEventTest #5 (kLFLen*2, 1), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #6 (0, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, kLFLen*2);
+  is(result.text, kLF + kLF, "runQueryTextContentEventTest #6 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  // #7
+  contenteditable.innerHTML = "<br><br>";
+
+  result = synthesizeQueryTextContent(0, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #7 (0, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(0, kLFLen * 2);
+  is(result.text, kLF + kLF, "runQueryTextContentEventTest #7 (0, kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(kLFLen, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #7 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(kLFLen * 2, 1);
+  is(result.text, "", "runQueryTextContentEventTest #7 (kLFLen*2, 1), \"" + contenteditable.innerHTML + "\"");
+
+  // #8
+  contenteditable.innerHTML = "<p><br><br></p>";
+
+  result = synthesizeQueryTextContent(kLFLen, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #8 (kLFLen, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(kLFLen, kLFLen * 2);
+  is(result.text, kLF + kLF, "runQueryTextContentEventTest #8 (kLFLen, kLFLen*2), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(kLFLen*2, kLFLen);
+  is(result.text, kLF, "runQueryTextContentEventTest #8 (kLFLen*2, kLFLen), \"" + contenteditable.innerHTML + "\"");
+
+  result = synthesizeQueryTextContent(kLFLen*3, 1);
+  is(result.text, "", "runQueryTextContentEventTest #8 (kLFLen*3, 1), \"" + contenteditable.innerHTML + "\"");
+
+  // #16
+  contenteditable.innerHTML = "a<blink>b</blink>c";
+
+  result = synthesizeQueryTextContent(0, 3);
+  is(result.text, "abc", "runQueryTextContentEventTest #16 (0, 3), \"" + contenteditable.innerHTML + "\"");
+}
+
+function runQuerySelectionEventTest()
+{
+  contenteditable.focus();
+
+  let selection = windowOfContenteditable.getSelection();
+
+  // #1
+  contenteditable.innerHTML = "<br/>a";
+  selection.setBaseAndExtent(contenteditable.firstChild, 0, contenteditable.lastChild, 1);
+  checkSelection(0, kLF + "a", "runQuerySelectionEventTest #1, \"" + contenteditable.innerHTML + "\"");
+
+  // #2
+  contenteditable.innerHTML = "<p></p><p>abc</p>";
+  selection.setBaseAndExtent(contenteditable.firstChild, 0, contenteditable.lastChild.firstChild, 1);
+  checkSelection(kLFLen, kLF + "a", "runQuerySelectionEventTest #2, \"" + contenteditable.innerHTML + "\"");
+
+  // #3
+  contenteditable.innerHTML = "<p>abc</p><p>def</p>";
+  selection.setBaseAndExtent(contenteditable.firstChild, 0, contenteditable.lastChild.firstChild, 1);
+  checkSelection(kLFLen, "abc" + kLF + "d", "runQuerySelectionEventTest #3, \"" + contenteditable.innerHTML + "\"");
+}
+
+function runQueryIMESelectionTest()
+{
+  textarea.focus();
+  textarea.value = "before  after";
+  let startoffset = textarea.selectionStart = textarea.selectionEnd = "before ".length;
+
+  if (!checkIMESelection("RawClause", false, 0, "", "runQueryIMESelectionTest: before starting composition") ||
+      !checkIMESelection("SelectedRawClause", false, 0, "", "runQueryIMESelectionTest: before starting composition") ||
+      !checkIMESelection("ConvertedClause", false, 0, "", "runQueryIMESelectionTest: before starting composition") ||
+      !checkIMESelection("SelectedClause", false, 0, "", "runQueryIMESelectionTest: before starting composition")) {
+    synthesizeComposition({ type: "compositioncommitasis" });
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "a",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  if (!checkIMESelection("RawClause", true, startoffset, "a", "runQueryIMESelectionTest: inputting raw text") ||
+      !checkIMESelection("SelectedRawClause", false, 0, "", "runQueryIMESelectionTest: inputting raw text") ||
+      !checkIMESelection("ConvertedClause", false, 0, "", "runQueryIMESelectionTest: inputting raw text") ||
+      !checkIMESelection("SelectedClause", false, 0, "", "runQueryIMESelectionTest: inputting raw text")) {
+    synthesizeComposition({ type: "compositioncommitasis" });
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "abcdefgh",
+        "clauses":
+        [
+          { "length": 8, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 8, "length": 0 }
+    });
+
+  if (!checkIMESelection("RawClause", true, startoffset, "abcdefgh", "runQueryIMESelectionTest: updating raw text") ||
+      !checkIMESelection("SelectedRawClause", false, 0, "", "runQueryIMESelectionTest: updating raw text") ||
+      !checkIMESelection("ConvertedClause", false, 0, "", "runQueryIMESelectionTest: updating raw text") ||
+      !checkIMESelection("SelectedClause", false, 0, "", "runQueryIMESelectionTest: updating raw text")) {
+    synthesizeComposition({ type: "compositioncommitasis" });
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "ABCDEFGH",
+        "clauses":
+        [
+          { "length": 2, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+          { "length": 3, "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE },
+          { "length": 3, "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE },
+        ]
+      },
+      "caret": { "start": 2, "length": 0 }
+    });
+
+  if (!checkIMESelection("RawClause", false, 0, "", "runQueryIMESelectionTest: starting to convert") ||
+      !checkIMESelection("SelectedRawClause", false, 0, "", "runQueryIMESelectionTest: starting to convert") ||
+      !checkIMESelection("ConvertedClause", true, startoffset + 2, "CDE", "runQueryIMESelectionTest: starting to convert") ||
+      !checkIMESelection("SelectedClause", true, startoffset, "AB", "runQueryIMESelectionTest: starting to convert")) {
+    synthesizeComposition({ type: "compositioncommitasis" });
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "ABCDEFGH",
+        "clauses":
+        [
+          { "length": 2, "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE },
+          { "length": 3, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+          { "length": 3, "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE },
+        ]
+      },
+      "caret": { "start": 5, "length": 0 }
+    });
+
+  if (!checkIMESelection("RawClause", false, 0, "", "runQueryIMESelectionTest: changing selected clause") ||
+      !checkIMESelection("SelectedRawClause", false, 0, "", "runQueryIMESelectionTest: changing selected clause") ||
+      !checkIMESelection("ConvertedClause", true, startoffset, "AB", "runQueryIMESelectionTest: changing selected clause") ||
+      !checkIMESelection("SelectedClause", true, startoffset + 2, "CDE", "runQueryIMESelectionTest: changing selected clause")) {
+    synthesizeComposition({ type: "compositioncommitasis" });
+    return;
+  }
+
+  synthesizeComposition({ type: "compositioncommitasis" });
+
+  if (!checkIMESelection("RawClause", false, 0, "", "runQueryIMESelectionTest: after committing composition") ||
+      !checkIMESelection("SelectedRawClause", false, 0, "", "runQueryIMESelectionTest: after committing composition") ||
+      !checkIMESelection("ConvertedClause", false, 0, "", "runQueryIMESelectionTest: after committing composition") ||
+      !checkIMESelection("SelectedClause", false, 0, "", "runQueryIMESelectionTest: after committing composition")) {
+    return;
+  }
+
+  startoffset = textarea.selectionStart;
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "abcdefgh",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE },
+          { "length": 1, "attr": COMPOSITION_ATTR_SELECTED_RAW_CLAUSE },
+          { "length": 1, "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE },
+          { "length": 1, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE },
+          { "length": 1, "attr": COMPOSITION_ATTR_SELECTED_RAW_CLAUSE },
+          { "length": 1, "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE },
+          { "length": 1, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+        ]
+      },
+      "caret": { "start": 8, "length": 0 }
+    });
+
+  if (!checkIMESelection("RawClause", true, startoffset, "a", "runQueryIMESelectionTest: unrealistic testcase") ||
+      !checkIMESelection("SelectedRawClause", true, startoffset + 1, "b", "runQueryIMESelectionTest: unrealistic testcase") ||
+      !checkIMESelection("ConvertedClause", true, startoffset + 2, "c", "runQueryIMESelectionTest: unrealistic testcase") ||
+      !checkIMESelection("SelectedClause", true, startoffset + 3, "d", "runQueryIMESelectionTest: unrealistic testcase")) {
+    synthesizeComposition({ type: "compositioncommitasis" });
+    return;
+  }
+
+  synthesizeComposition({ type: "compositioncommitasis" });
+}
+
+function runQueryPasswordTest() {
+  function checkRange(aOffset, aLength, aExpectedResult, aDescription) {
+    password.focus();
+    let result = synthesizeQueryTextContent(aOffset, aLength);
+    is(result.text, aExpectedResult,
+       `${aDescription}: synthesizeQueryTextContent(${aOffset}, ${aLength})`);
+    password.setSelectionRange(aOffset, aOffset + aLength);
+    result = synthesizeQuerySelectedText();
+    is(result.text, aExpectedResult,
+       `${aDescription}: synthesizeQuerySelectedText(${aOffset}, ${aLength})`);
+  }
+
+  let editor = password.editor;
+  const kMask = editor.passwordMask;
+  password.value = "abcdef";
+
+  editor.mask();
+  checkRange(0, 6, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: unmasked range is not specified #1");
+  checkRange(0, 3, `${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: unmasked range is not specified #2");
+  checkRange(3, 3, `${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: unmasked range is not specified #3");
+  checkRange(2, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: unmasked range is not specified #4");
+
+  editor.unmask(0, 6);
+  checkRange(0, 6, "abcdef",
+             "runQueryPasswordTest: unmasked range 0-6 #1");
+  checkRange(0, 3, "abc",
+             "runQueryPasswordTest: unmasked range 0-6 #2");
+  checkRange(3, 3, "def",
+             "runQueryPasswordTest: unmasked range 0-6 #3");
+  checkRange(2, 2, "cd",
+             "runQueryPasswordTest: unmasked range 0-6 #4");
+
+  editor.unmask(0, 3);
+  checkRange(0, 6, `abc${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: unmasked range 0-3 #1");
+  checkRange(0, 3, "abc",
+             "runQueryPasswordTest: unmasked range 0-3 #2");
+  checkRange(3, 3, `${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: unmasked range 0-3 #3");
+  checkRange(2, 2, `c${kMask}`,
+             "runQueryPasswordTest: unmasked range 0-3 #4");
+
+  editor.unmask(3, 6);
+  checkRange(0, 6, `${kMask}${kMask}${kMask}def`,
+             "runQueryPasswordTest: unmasked range 3-6 #1");
+  checkRange(0, 3, `${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: unmasked range 3-6 #2");
+  checkRange(3, 3, `def`,
+             "runQueryPasswordTest: unmasked range 3-6 #3");
+  checkRange(2, 2, `${kMask}d`,
+             "runQueryPasswordTest: unmasked range 3-6 #4");
+
+  editor.unmask(2, 4);
+  checkRange(0, 6, `${kMask}${kMask}cd${kMask}${kMask}`,
+             "runQueryPasswordTest: unmasked range 3-4 #1");
+  checkRange(1, 2, `${kMask}c`,
+             "runQueryPasswordTest: unmasked range 3-4 #2");
+  checkRange(1, 3, `${kMask}cd`,
+             "runQueryPasswordTest: unmasked range 3-4 #3");
+  checkRange(1, 4, `${kMask}cd${kMask}`,
+             "runQueryPasswordTest: unmasked range 3-4 #4");
+  checkRange(2, 2, "cd",
+             "runQueryPasswordTest: unmasked range 3-4 #5");
+  checkRange(2, 3, `cd${kMask}`,
+             "runQueryPasswordTest: unmasked range 3-4 #6");
+
+
+  const kEmoji = String.fromCodePoint(0x1f914);
+  password.value = `${kEmoji}${kEmoji}${kEmoji}`
+
+  editor.mask();
+  checkRange(0, 6, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range is not specified");
+
+  editor.unmask(0, 2);
+  checkRange(0, 6, `${kEmoji}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 0-2 #1");
+  checkRange(0, 2, `${kEmoji}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 0-2 #2");
+  checkRange(2, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 0-2 #3");
+  checkRange(4, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 0-2 #4");
+
+  editor.unmask(2, 4);
+  checkRange(0, 6, `${kMask}${kMask}${kEmoji}${kMask}${kMask}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 2-4 #1");
+  checkRange(0, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 2-4 #2");
+  checkRange(2, 2, `${kEmoji}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 2-4 #3");
+  checkRange(4, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 2-4 #4");
+
+  editor.unmask(4, 6);
+  checkRange(0, 6, `${kMask}${kMask}${kMask}${kMask}${kEmoji}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 4-6 #1");
+  checkRange(0, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 4-6 #2");
+  checkRange(2, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 4-6 #3");
+  checkRange(4, 2, `${kEmoji}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 4-6 #4");
+
+  editor.unmask(0, 1);
+  checkRange(0, 6, `${kEmoji}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 0-1");
+
+  editor.unmask(1, 2);
+  checkRange(0, 6, `${kEmoji}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 1-2");
+
+  editor.unmask(2, 3);
+  checkRange(0, 6, `${kMask}${kMask}${kEmoji}${kMask}${kMask}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 2-3");
+
+  editor.unmask(3, 4);
+  checkRange(0, 6, `${kMask}${kMask}${kEmoji}${kMask}${kMask}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 3-4");
+
+  editor.unmask(4, 5);
+  checkRange(0, 6, `${kMask}${kMask}${kMask}${kMask}${kEmoji}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 4-5");
+
+  editor.unmask(5, 6);
+  checkRange(0, 6, `${kMask}${kMask}${kMask}${kMask}${kEmoji}`,
+             "runQueryPasswordTest: Emojis in password, unmasked range 5-6");
+
+
+  const kEmojiSuperhero = String.fromCodePoint(0x1f9b8);
+  const kEmojiMediumSkinTone = String.fromCodePoint(0x1f3fd);
+  const kZeroWidthJoiner = "\u200d";
+  const kFemaleSign = "\u2640";
+  const kVariationSelector16 = "\ufe0f";
+  const kComplicatedEmoji = `${kEmojiSuperhero}${kEmojiMediumSkinTone}${kZeroWidthJoiner}${kFemaleSign}${kVariationSelector16}`;
+  password.value = `${kComplicatedEmoji}${kComplicatedEmoji}${kComplicatedEmoji}`
+  editor.mask();
+  checkRange(0, 21, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emojis in password, unmasked range is not specified");
+
+  editor.unmask(0, 7);
+  checkRange(0, 21, `${kComplicatedEmoji}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emojis in password, unmasked range 0-7 #1");
+  checkRange(0, 7, `${kComplicatedEmoji}`,
+             "runQueryPasswordTest: Complicated emojis in password, unmasked range 0-7 #2");
+  checkRange(7, 7, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emojis in password, unmasked range 0-7 #3");
+  checkRange(14, 7, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emojis in password, unmasked range 0-7 #4");
+
+  editor.unmask(7, 14);
+  checkRange(0, 21, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kComplicatedEmoji}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emojis in password, unmasked range 7-14 #1");
+  checkRange(0, 7, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emojis in password, unmasked range 7-14 #2");
+  checkRange(7, 7, `${kComplicatedEmoji}`,
+             "runQueryPasswordTest: Complicated emojis in password, unmasked range 7-14 #3");
+  checkRange(14, 7, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emojis in password, unmasked range 7-14 #4");
+
+  editor.unmask(14, 21);
+  checkRange(0, 21, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kComplicatedEmoji}`,
+             "runQueryPasswordTest: Complicated emojis in password, unmasked range 14-21 #1");
+  checkRange(0, 7, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emojis in password, unmasked range 14-21 #2");
+  checkRange(7, 7, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emojis in password, unmasked range 14-21 #3");
+  checkRange(14, 7, `${kComplicatedEmoji}`,
+             "runQueryPasswordTest: Complicated emojis in password, unmasked range 14-21 #4");
+
+  password.value = `${kComplicatedEmoji}`
+  editor.unmask(0, 1);
+  checkRange(0, 7, `${kEmojiSuperhero}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emoji in password, unmasked range 0-1");
+
+  editor.unmask(1, 2);
+  checkRange(0, 7, `${kEmojiSuperhero}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emoji in password, unmasked range 1-2");
+
+  editor.unmask(2, 3);
+  checkRange(0, 7, `${kMask}${kMask}${kEmojiMediumSkinTone}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emoji in password, unmasked range 2-3");
+
+  editor.unmask(3, 4);
+  checkRange(0, 7, `${kMask}${kMask}${kEmojiMediumSkinTone}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emoji in password, unmasked range 3-4");
+
+  editor.unmask(4, 5);
+  checkRange(0, 7, `${kMask}${kMask}${kMask}${kMask}${kZeroWidthJoiner}${kMask}${kMask}`,
+             "runQueryPasswordTest: Complicated emoji in password, unmasked range 4-5");
+
+  editor.unmask(5, 6);
+  checkRange(0, 7, `${kMask}${kMask}${kMask}${kMask}${kMask}${kFemaleSign}${kMask}`,
+             "runQueryPasswordTest: Complicated emoji in password, unmasked range 5-6");
+
+  editor.unmask(6, 7);
+  checkRange(0, 7, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kVariationSelector16}`,
+             "runQueryPasswordTest: Complicated emoji in password, unmasked range 6-7");
+
+
+  const kKanji = "\u8fba";
+  const kIVS = String.fromCodePoint(0xe0101);
+  const kKanjiWithIVS = `${kKanji}${kIVS}`;
+  password.value = `${kKanjiWithIVS}${kKanjiWithIVS}${kKanjiWithIVS}`
+
+  editor.mask();
+  checkRange(0, 9, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range is not specified");
+
+  editor.unmask(0, 3);
+  checkRange(0, 9, `${kKanjiWithIVS}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #1");
+  checkRange(0, 3, `${kKanjiWithIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #2");
+  checkRange(1, 3, `${kIVS}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #3");
+  checkRange(0, 1, `${kKanji}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #4");
+  checkRange(1, 2, `${kIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #5");
+  checkRange(3, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #6");
+  checkRange(4, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #7");
+  checkRange(6, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #8");
+  checkRange(7, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #9");
+
+  editor.unmask(0, 1);
+  checkRange(0, 9, `${kKanji}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 0-1 #1");
+  checkRange(0, 1, `${kKanji}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 0-1 #2");
+  checkRange(1, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 0-1 #3");
+  checkRange(3, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 0-1 #4");
+  checkRange(4, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 0-1 #5");
+  checkRange(6, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 0-1 #6");
+  checkRange(7, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 0-1 #7");
+
+  editor.unmask(1, 3);
+  checkRange(0, 9, `${kMask}${kIVS}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #1");
+  checkRange(0, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #2");
+  checkRange(1, 2, `${kIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #3");
+  checkRange(3, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #4");
+  checkRange(4, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #5");
+  checkRange(6, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #6");
+  checkRange(7, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-3 #7");
+
+  editor.unmask(3, 6);
+  checkRange(0, 9, `${kMask}${kMask}${kMask}${kKanjiWithIVS}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-6 #1");
+  checkRange(3, 3, `${kKanjiWithIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-6 #2");
+  checkRange(4, 3, `${kIVS}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-6 #3");
+  checkRange(0, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-6 #4");
+  checkRange(1, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-6 #5");
+  checkRange(3, 1, `${kKanji}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-6 #6");
+  checkRange(4, 2, `${kIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-6 #7");
+  checkRange(6, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-6 #8");
+  checkRange(7, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-6 #9");
+
+  editor.unmask(3, 4);
+  checkRange(0, 9, `${kMask}${kMask}${kMask}${kKanji}${kMask}${kMask}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-4 #1");
+  checkRange(0, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-4 #2");
+  checkRange(1, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-4 #3");
+  checkRange(3, 1, `${kKanji}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-4 #4");
+  checkRange(4, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-4 #5");
+  checkRange(6, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-4 #6");
+  checkRange(7, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-4 #7");
+
+  editor.unmask(4, 6);
+  checkRange(0, 9, `${kMask}${kMask}${kMask}${kMask}${kIVS}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 4-6 #1");
+  checkRange(0, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 4-6 #2");
+  checkRange(1, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 4-6 #3");
+  checkRange(3, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 4-6 #4");
+  checkRange(4, 2, `${kIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 4-6 #5");
+  checkRange(6, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 4-6 #6");
+  checkRange(7, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 4-6 #7");
+
+  editor.unmask(6, 9);
+  checkRange(0, 9, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kKanjiWithIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-9 #1");
+  checkRange(6, 3, `${kKanjiWithIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-9 #2");
+  checkRange(4, 3, `${kMask}${kMask}${kKanji}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-9 #3");
+  checkRange(0, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-9 #4");
+  checkRange(1, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-9 #5");
+  checkRange(3, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-9 #6");
+  checkRange(4, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-9 #7");
+  checkRange(6, 1, `${kKanji}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-9 #8");
+  checkRange(7, 2, `${kIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-9 #9");
+
+  editor.unmask(6, 7);
+  checkRange(0, 9, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kKanji}${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-7 #1");
+  checkRange(0, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-7 #2");
+  checkRange(1, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-7 #3");
+  checkRange(3, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-7 #4");
+  checkRange(4, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-7 #5");
+  checkRange(6, 1, `${kKanji}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-7 #6");
+  checkRange(7, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 6-7 #7");
+
+  editor.unmask(7, 9);
+  checkRange(0, 9, `${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kMask}${kIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 7-9 #1");
+  checkRange(0, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 7-9 #2");
+  checkRange(1, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 7-9 #3");
+  checkRange(3, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 7-9 #4");
+  checkRange(4, 2, `${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 7-9 #5");
+  checkRange(6, 1, `${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 7-9 #6");
+  checkRange(7, 2, `${kIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 7-9 #7");
+
+  password.value = `${kKanjiWithIVS}${kKanjiWithIVS}`;
+  editor.unmask(0, 2);
+  checkRange(0, 6, `${kKanjiWithIVS}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 0-2");
+
+  editor.unmask(1, 2);
+  checkRange(0, 6, `${kMask}${kIVS}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 1-2");
+
+  editor.unmask(2, 3);
+  checkRange(0, 6, `${kMask}${kIVS}${kMask}${kMask}${kMask}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 2-3");
+
+  editor.unmask(3, 5);
+  checkRange(0, 6, `${kMask}${kMask}${kMask}${kKanjiWithIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 3-5");
+
+  editor.unmask(4, 5);
+  checkRange(0, 6, `${kMask}${kMask}${kMask}${kMask}${kIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 4-5");
+
+  editor.unmask(5, 6);
+  checkRange(0, 6, `${kMask}${kMask}${kMask}${kMask}${kIVS}`,
+             "runQueryPasswordTest: Pairs of Kanji and IVS in password, unmasked range 5-6");
+
+  editor.mask();
+}
+
+function runQueryContentEventRelativeToInsertionPoint()
+{
+  textarea.focus();
+  textarea.value = "0123456789";
+
+  // "[]0123456789"
+  let startOffset = textarea.selectionStart = textarea.selectionEnd = 0;
+  if (!checkContentRelativeToSelection(0, 1, 0, "0", "runQueryContentEventRelativeToInsertionPoint[0-0]", "#1") ||
+      !checkContentRelativeToSelection(-1, 1, 0, "0", "runQueryContentEventRelativeToInsertionPoint[0-0]", "#2") ||
+      !checkContentRelativeToSelection(1, 1, 1, "1", "runQueryContentEventRelativeToInsertionPoint[0-0]", "#3") ||
+      !checkContentRelativeToSelection(5, 10, 5, "56789", "runQueryContentEventRelativeToInsertionPoint[0-0]", "#4") ||
+      !checkContentRelativeToSelection(10, 1, 10, "", "runQueryContentEventRelativeToInsertionPoint[0-0]", "#5")) {
+    return;
+  }
+
+  // "[01234]56789"
+  textarea.selectionEnd = 5;
+  if (!checkContentRelativeToSelection(0, 1, 0, "0", "runQueryContentEventRelativeToInsertionPoint[0-5]", "#1") ||
+      !checkContentRelativeToSelection(-1, 1, 0, "0", "runQueryContentEventRelativeToInsertionPoint[0-5]", "#2") ||
+      !checkContentRelativeToSelection(1, 1, 1, "1", "runQueryContentEventRelativeToInsertionPoint[0-5]", "#3") ||
+      !checkContentRelativeToSelection(5, 10, 5, "56789", "runQueryContentEventRelativeToInsertionPoint[0-5]", "#4") ||
+      !checkContentRelativeToSelection(10, 1, 10, "", "runQueryContentEventRelativeToInsertionPoint[0-5]", "#5")) {
+    return;
+  }
+
+  // "0123[]456789"
+  startOffset = textarea.selectionStart = textarea.selectionEnd = 4;
+  if (!checkContentRelativeToSelection(0, 1, startOffset + 0, "4", "runQueryContentEventRelativeToInsertionPoint[4-4]", "#1") ||
+      !checkContentRelativeToSelection(-1, 1, startOffset - 1, "3", "runQueryContentEventRelativeToInsertionPoint[4-4]", "#2") ||
+      !checkContentRelativeToSelection(1, 1, startOffset + 1, "5", "runQueryContentEventRelativeToInsertionPoint[4-4]", "#3") ||
+      !checkContentRelativeToSelection(5, 10, startOffset + 5, "9", "runQueryContentEventRelativeToInsertionPoint[4-4]", "#4") ||
+      !checkContentRelativeToSelection(10, 1, 10, "", "runQueryContentEventRelativeToInsertionPoint[4-4]", "#5")) {
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "a",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+  // "0123[a]456789"
+  if (!checkContentRelativeToSelection(0, 1, startOffset + 0, "a", "runQueryContentEventRelativeToInsertionPoint[composition at 4]", "#1") ||
+      !checkContentRelativeToSelection(-1, 1, startOffset - 1, "3", "runQueryContentEventRelativeToInsertionPoint[composition at 4]", "#2") ||
+      !checkContentRelativeToSelection(1, 1, startOffset + 1, "4", "runQueryContentEventRelativeToInsertionPoint[composition at 4]", "#3") ||
+      !checkContentRelativeToSelection(5, 10, startOffset + 5, "89", "runQueryContentEventRelativeToInsertionPoint[composition at 4]", "#4") ||
+      !checkContentRelativeToSelection(11, 1, 11, "", "runQueryContentEventRelativeToInsertionPoint[composition at 4]")) {
+    synthesizeComposition({ type: "compositioncommitasis" });
+    return;
+  }
+
+  synthesizeComposition({ type: "compositioncommitasis" });
+
+  // Move start of composition at first compositionupdate event.
+  function onCompositionUpdate(aEvent)
+  {
+    startOffset = textarea.selectionStart = textarea.selectionEnd = textarea.selectionStart - 1;
+    textarea.removeEventListener("compositionupdate", onCompositionUpdate);
+  }
+  textarea.addEventListener("compositionupdate", onCompositionUpdate);
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "b",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+  // "0123[b]a456789"
+  if (!checkContentRelativeToSelection(0, 1, startOffset + 0, "b", "runQueryContentEventRelativeToInsertionPoint[composition at 3]", "#1") ||
+      !checkContentRelativeToSelection(-1, 1, startOffset - 1, "3", "runQueryContentEventRelativeToInsertionPoint[composition at 3]", "#2") ||
+      !checkContentRelativeToSelection(1, 1, startOffset + 1, "a", "runQueryContentEventRelativeToInsertionPoint[composition at 3]", "#3") ||
+      !checkContentRelativeToSelection(5, 10, startOffset + 5, "789", "runQueryContentEventRelativeToInsertionPoint[composition at 3]", "#4") ||
+      !checkContentRelativeToSelection(12, 1, 12, "", "runQueryContentEventRelativeToInsertionPoint[composition at 3]", "#5")) {
+    synthesizeComposition({ type: "compositioncommitasis" });
+    return;
+  }
+
+  synthesizeComposition({ type: "compositioncommitasis" });
+}
+
+function runBug1375825Test()
+{
+  contenteditable.focus();
+
+  // #1
+  contenteditable.innerHTML = "abc<span contenteditable=\"false\">defgh</span>";
+
+  let ret = synthesizeQueryTextRect(2, 1);
+  if (!checkQueryContentResult(ret, "runBug1375825Test #1 (2, 1), \"" + contenteditable.innerHTML + "\"")) {
+    return;
+  }
+  is(ret.text, "c", "runBug1375825Test #1 (2, 1), \"" + contenteditable.innerHTML + "\": should have queried a rect for 'c'");
+
+  ret = synthesizeQueryTextRect(3, 1);
+  if (!checkQueryContentResult(ret, "runBug1375825Test #1 (3, 1), \"" + contenteditable.innerHTML + "\"")) {
+    return;
+  }
+  is(ret.text, "d", "runBug1375825Test #1 (3, 1), \"" + contenteditable.innerHTML + "\": should have queried a rect for 'd'");
+
+  ret = synthesizeQueryTextRect(4, 1);
+  if (!checkQueryContentResult(ret, "runBug1375825Test #1 (4, 1), \"" + contenteditable.innerHTML + "\"")) {
+    return;
+  }
+  is(ret.text, "e", "runBug1375825Test #1 (4, 1), \"" + contenteditable.innerHTML + "\": should have queried a rect for 'e'");
+
+  ret = synthesizeQueryTextRect(5, 1);
+  if (!checkQueryContentResult(ret, "runBug1375825Test #1 (5, 1), \"" + contenteditable.innerHTML + "\"")) {
+    return;
+  }
+  is(ret.text, "f", "runBug1375825Test #1 (5, 1), \"" + contenteditable.innerHTML + "\": should have queried a rect for 'f'");
+
+  ret = synthesizeQueryTextRect(6, 1);
+  if (!checkQueryContentResult(ret, "runBug1375825Test #1 (6, 1), \"" + contenteditable.innerHTML + "\"")) {
+    return;
+  }
+  is(ret.text, "g", "runBug1375825Test #1 (6, 1), \"" + contenteditable.innerHTML + "\": should have queried a rect for 'g'");
+
+  ret = synthesizeQueryTextRect(7, 1);
+  if (!checkQueryContentResult(ret, "runBug1375825Test #1 (7, 1), \"" + contenteditable.innerHTML + "\"")) {
+    return;
+  }
+  is(ret.text, "h", "runBug1375825Test #1 (7, 1), \"" + contenteditable.innerHTML + "\": should have queried a rect for 'h'");
+
+  // #2
+  contenteditable.innerHTML = "abc<span style=\"user-select: all;\">defgh</span>";
+
+  ret = synthesizeQueryTextRect(2, 1);
+  if (!checkQueryContentResult(ret, "runBug1375825Test #2 (2, 1), \"" + contenteditable.innerHTML + "\"")) {
+    return;
+  }
+  is(ret.text, "c", "runBug1375825Test #2 (2, 1), \"" + contenteditable.innerHTML + "\": should have queried a rect for 'c'");
+
+  ret = synthesizeQueryTextRect(3, 1);
+  if (!checkQueryContentResult(ret, "runBug1375825Test #2 (3, 1), \"" + contenteditable.innerHTML + "\"")) {
+    return;
+  }
+  is(ret.text, "d", "runBug1375825Test #2 (3, 1), \"" + contenteditable.innerHTML + "\": should have queried a rect for 'd'");
+
+  ret = synthesizeQueryTextRect(4, 1);
+  if (!checkQueryContentResult(ret, "runBug1375825Test #2 (4, 1), \"" + contenteditable.innerHTML + "\"")) {
+    return;
+  }
+  is(ret.text, "e", "runBug1375825Test #2 (4, 1), \"" + contenteditable.innerHTML + "\": should have queried a rect for 'e'");
+
+  ret = synthesizeQueryTextRect(5, 1);
+  if (!checkQueryContentResult(ret, "runBug1375825Test #2 (5, 1), \"" + contenteditable.innerHTML + "\"")) {
+    return;
+  }
+  is(ret.text, "f", "runBug1375825Test #2 (5, 1), \"" + contenteditable.innerHTML + "\": should have queried a rect for 'f'");
+
+  ret = synthesizeQueryTextRect(6, 1);
+  if (!checkQueryContentResult(ret, "runBug1375825Test #2 (6, 1), \"" + contenteditable.innerHTML + "\"")) {
+    return;
+  }
+  is(ret.text, "g", "runBug1375825Test #2 (6, 1), \"" + contenteditable.innerHTML + "\": should have queried a rect for 'g'");
+
+  ret = synthesizeQueryTextRect(7, 1);
+  if (!checkQueryContentResult(ret, "runBug1375825Test #2 (7, 1), \"" + contenteditable.innerHTML + "\"")) {
+    return;
+  }
+  is(ret.text, "h", "runBug1375825Test #2 (7, 1), \"" + contenteditable.innerHTML + "\": should have queried a rect for 'h'");
+}
+
+function runBug1530649Test()
+{
+  // Vietnamese IME on macOS commits composition with typing space key.
+  // Then, typing new word shouldn't trim the trailing whitespace.
+  contenteditable.focus();
+  contenteditable.innerHTML = "";
+  synthesizeCompositionChange(
+    {composition: {string: "abc", clauses: [{length: 3, attr: COMPOSITION_ATTR_RAW_CLAUSE}]},
+     caret: {start: 3, length: 0}});
+  synthesizeComposition({type: "compositioncommit", data: "abc ", key: " "});
+
+  is(contenteditable.innerHTML, "abc <br>",
+     "runBug1530649Test: The trailing space shouldn't be removed");
+
+  synthesizeCompositionChange(
+    {composition: {string: "d", clauses: [{length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE}]},
+     caret: {start: 1, length: 0}});
+
+  is(contenteditable.innerHTML, "abc d<br>",
+     "runBug1530649Test: The new composition string shouldn't remove the last space");
+
+  synthesizeComposition({type: "compositioncommitasis", key: "KEY_Enter"});
+
+  is(contenteditable.innerHTML, "abc d<br>",
+     "runBug1530649Test: Committing the new composition string shouldn't remove the last space");
+}
+
+function runBug1571375Test()
+{
+  let selection = windowOfContenteditableBySpan.getSelection();
+  let doc = document.getElementById("iframe7").contentDocument;
+
+  contenteditableBySpan.focus();
+
+  contenteditableBySpan.innerHTML = "hello world";
+  let range = doc.createRange();
+  range.setStart(contenteditableBySpan.firstChild, 6);
+  range.setEnd(contenteditableBySpan.firstChild, 11);
+  selection.removeAllRanges();
+  selection.addRange(range);
+
+  synthesizeCompositionChange({
+    composition: {string: "world", clauses: [{length: 5, attr: COMPOSITION_ATTR_RAW_CLAUSE}]},
+    caret: { start: 5, length: 0 },
+  });
+  synthesizeComposition({type: "compositioncommit", data: "world", key: " "});
+  is(contenteditableBySpan.innerHTML, "hello world",
+     "runBug1571375Test: space must not be removed by commit");
+
+  contenteditableBySpan.innerHTML = "hello world";
+  range = doc.createRange();
+  range.setStart(contenteditableBySpan.firstChild, 0);
+  range.setEnd(contenteditableBySpan.firstChild, 5);
+  selection.removeAllRanges();
+  selection.addRange(range);
+
+  synthesizeCompositionChange({
+    composition: {string: "hello", clauses: [{length: 5, attr: COMPOSITION_ATTR_RAW_CLAUSE}]},
+    caret: { start: 5, length: 0 },
+  });
+  synthesizeComposition({type: "compositioncommit", data: "hello", key: " "});
+  is(contenteditableBySpan.innerHTML, "hello world",
+     "runBug1571375Test: space must not be removed by commit");
+
+  contenteditableBySpan.innerHTML = "hello world<div>.</div>";
+  range = doc.createRange();
+  range.setStart(contenteditableBySpan.firstChild, 6);
+  range.setEnd(contenteditableBySpan.firstChild, 11);
+  selection.removeAllRanges();
+  selection.addRange(range);
+
+  synthesizeCompositionChange({
+    composition: {string: "world", clauses: [{length: 5, attr: COMPOSITION_ATTR_RAW_CLAUSE}]},
+    caret: {start: 0, length: 0}}
+  );
+  synthesizeComposition({type: "compositioncommit", data: "world", key: " "});
+  is(contenteditableBySpan.innerHTML, "hello world<div>.</div>",
+     "runBug1571375Test: space must not be removed by commit");
+}
+
+async function runBug1584901Test()
+{
+  contenteditableBySpan.focus();
+  contenteditableBySpan.innerHTML = "";
+
+  // XXX synthesizeCompositionChange won't work without wait.
+  await waitForTick();
+
+  synthesizeCompositionChange({
+    composition: {string: "a ", clauses: [{length: 2, attr: COMPOSITION_ATTR_RAW_CLAUSE}]},
+  });
+  synthesizeComposition({type: "compositioncommitasis", key: " "});
+
+  is(contenteditableBySpan.innerHTML, "a&nbsp;",
+     "runBug1584901Test: space must not be removed by composition change");
+
+  synthesizeCompositionChange({
+    composition: {string: "b ", clauses: [{length: 2, attr: COMPOSITION_ATTR_RAW_CLAUSE}]},
+  });
+  synthesizeComposition({type: "compositioncommitasis", key: " "});
+
+  is(contenteditableBySpan.innerHTML, "a b&nbsp;",
+     "runBug1584901Test: space must not be removed by composition change");
+}
+
+function runBug1675313Test()
+{
+  input.value = "";
+  input.focus();
+  let count = 0;
+
+  function handler() {
+    input.focus();
+    count++;
+  }
+
+  input.addEventListener("keydown", handler);
+  input.addEventListener("keyup", handler);
+
+  synthesizeCompositionChange({
+    composition: {
+      string: "a",
+      clauses: [{length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE}],
+      key: { key: "a", type: "keyup" },
+    },
+  });
+  synthesizeCompositionChange({
+    composition: {
+      string: "b",
+      clauses: [{length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE}],
+      key: { key: "b", type: "keyup" },
+    },
+  });
+  synthesizeComposition({type: "compositioncommitasis"});
+
+  is(count, 6, "runBug1675313Test: keydown event and keyup event are fired correctly");
+  is(input.value, "b",
+     "runBug1675313Test: re-focus element doesn't commit composition if re-focus isn't click by user");
+
+  input.removeEventListener("keyup", handler);
+}
+
+function runCommitCompositionWithSpaceKey()
+{
+  contenteditable.focus();
+  contenteditable.innerHTML = "";
+
+  // Last white space might be &nbsp; if last child is no <br>
+  // Actually, our implementation will insert <br> element at last child, so
+  // white space will be ASCII space.
+
+  synthesizeCompositionChange({
+    composition: {string: "a", clauses: [{length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE}]},
+  });
+  synthesizeComposition({type: "compositioncommit", data: "a"});
+  synthesizeKey(" ");
+
+  is(contenteditable.innerHTML, "a <br>",
+     "runCommitCompositionWithSpaceKey: last single space should be kept");
+
+  synthesizeCompositionChange({
+    composition: {string: "b", clauses: [{length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE}]},
+  });
+  synthesizeComposition({type: "compositioncommit", data: "b"});
+  synthesizeKey(" ");
+
+  is(contenteditable.innerHTML, "a b <br>",
+     "runCommitCompositionWithSpaceKey: inserting composition shouldn't remove last single space.");
+
+  synthesizeCompositionChange({
+    composition: {string: "c", clauses: [{length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE}]},
+  });
+  synthesizeComposition({type: "compositioncommit", data: "c"});
+  synthesizeKey(" ");
+
+  is(contenteditable.innerHTML, "a b c <br>",
+     "runCommitCompositionWithSpaceKey: inserting composition shouldn't remove last single space.");
+
+  contenteditable.innerHTML = "a";
+  windowOfContenteditable.getSelection().collapse(contenteditable.firstChild, contenteditable.firstChild.length);
+  is(contenteditable.innerHTML, "a",
+     "runCommitCompositionWithSpaceKey: contenteditable should be initialized with text ending with a space and without following <br> element");
+
+  synthesizeCompositionChange({
+    composition: {string: "b", clauses: [{length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE}]},
+  });
+  synthesizeComposition({type: "compositioncommit", data: "b ", key: { key: " ", code: "Space" }});
+
+  is(contenteditable.innerHTML, "ab <br>",
+     "runCommitCompositionWithSpaceKey: contenteditable should end with a padding <br> element after inserting commit string ending with a space");
+}
+
+function runCSSTransformTest()
+{
+  textarea.focus();
+  textarea.value = "some text";
+  textarea.selectionStart = textarea.selectionEnd = textarea.value.length;
+  let editorRect = synthesizeQueryEditorRect();
+  if (!checkQueryContentResult(editorRect,
+        "runCSSTransformTest: editorRect")) {
+    return;
+  }
+  let firstCharRect = synthesizeQueryTextRect(0, 1);
+  if (!checkQueryContentResult(firstCharRect,
+        "runCSSTransformTest: firstCharRect")) {
+    return;
+  }
+  let lastCharRect = synthesizeQueryTextRect(textarea.value.length - 1, textarea.value.length);
+  if (!checkQueryContentResult(lastCharRect,
+        "runCSSTransformTest: lastCharRect")) {
+    return;
+  }
+  let caretRect = synthesizeQueryCaretRect(textarea.selectionStart);
+  if (!checkQueryContentResult(caretRect,
+        "runCSSTransformTest: caretRect")) {
+    return;
+  }
+  let caretRectBeforeFirstChar = synthesizeQueryCaretRect(0);
+  if (!checkQueryContentResult(caretRectBeforeFirstChar,
+        "runCSSTransformTest: caretRectBeforeFirstChar")) {
+    return;
+  }
+
+  try {
+    textarea.style.transform = "translate(10px, 15px)";
+    function movedRect(aRect, aCSS_CX, aCSS_CY)
+    {
+      return {
+        left: aRect.left + Math.round(aCSS_CX * window.devicePixelRatio),
+        top: aRect.top + Math.round(aCSS_CY * window.devicePixelRatio),
+        width: aRect.width,
+        height: aRect.height
+      };
+    }
+
+    let editorRectTranslated = synthesizeQueryEditorRect();
+    if (!checkQueryContentResult(editorRectTranslated,
+          "runCSSTransformTest: editorRectTranslated, " + textarea.style.transform) ||
+        !checkRectFuzzy(editorRectTranslated, movedRect(editorRect, 10, 15), {left: 1, top: 1, width: 1, height: 1},
+          "runCSSTransformTest: editorRectTranslated, " + textarea.style.transform)) {
+      return;
+    }
+    let firstCharRectTranslated = synthesizeQueryTextRect(0, 1);
+    if (!checkQueryContentResult(firstCharRectTranslated,
+          "runCSSTransformTest: firstCharRectTranslated, " + textarea.style.transform) ||
+        !checkRectFuzzy(firstCharRectTranslated, movedRect(firstCharRect, 10, 15), {left: 1, top: 1, width: 1, height: 1},
+          "runCSSTransformTest: firstCharRectTranslated, " + textarea.style.transform)) {
+      return;
+    }
+    let lastCharRectTranslated = synthesizeQueryTextRect(textarea.value.length - 1, textarea.value.length);
+    if (!checkQueryContentResult(lastCharRectTranslated,
+          "runCSSTransformTest: lastCharRectTranslated, " + textarea.style.transform) ||
+        !checkRectFuzzy(lastCharRectTranslated, movedRect(lastCharRect, 10, 15), {left: 1, top: 1, width: 1, height: 1},
+          "runCSSTransformTest: lastCharRectTranslated, " + textarea.style.transform)) {
+      return;
+    }
+    let caretRectTranslated = synthesizeQueryCaretRect(textarea.selectionStart);
+    if (!checkQueryContentResult(caretRectTranslated,
+          "runCSSTransformTest: caretRectTranslated, " + textarea.style.transform) ||
+        !checkRectFuzzy(caretRectTranslated, movedRect(caretRect, 10, 15), {left: 1, top: 1, width: 1, height: 1},
+          "runCSSTransformTest: caretRectTranslated, " + textarea.style.transform)) {
+      return;
+    }
+    let caretRectBeforeFirstCharTranslated = synthesizeQueryCaretRect(0);
+    if (!checkQueryContentResult(caretRectBeforeFirstCharTranslated,
+          "runCSSTransformTest: caretRectBeforeFirstCharTranslated, " + textarea.style.transform) ||
+        !checkRectFuzzy(caretRectBeforeFirstCharTranslated, movedRect(caretRectBeforeFirstChar, 10, 15), {left: 1, top: 1, width: 1, height: 1},
+          "runCSSTransformTest: caretRectBeforeFirstCharTranslated, " + textarea.style.transform)) {
+      return;
+    }
+    let firstCharRectTranslatedAsArray = synthesizeQueryTextRectArray(0, 1);
+    if (!checkQueryContentResult(firstCharRectTranslatedAsArray, "runCSSTransformTest: firstCharRectTranslatedAsArray, " + textarea.style.transform) ||
+        !checkRectArray(firstCharRectTranslatedAsArray, [firstCharRectTranslated], "runCSSTransformTest: firstCharRectTranslatedAsArray, " + textarea.style.transform)) {
+      return;
+    }
+    let lastCharRectTranslatedAsArray = synthesizeQueryTextRectArray(textarea.value.length - 1, textarea.value.length);
+    if (!checkQueryContentResult(lastCharRectTranslatedAsArray, "runCSSTransformTest: lastCharRectTranslatedAsArray, " + textarea.style.transform) ||
+        !checkRectArray(lastCharRectTranslatedAsArray, [lastCharRectTranslated], "runCSSTransformTest: lastCharRectTranslatedAsArray, " + textarea.style.transform)) {
+      return;
+    }
+
+    // XXX It's too difficult to check the result with scale and rotate...
+    //     For now, let's check if query text rect and query text rect array returns same rect.
+    textarea.style.transform = "scale(1.5)";
+    firstCharRectTranslated = synthesizeQueryTextRect(0, 1);
+    if (!checkQueryContentResult(firstCharRectTranslated,
+          "runCSSTransformTest: firstCharRectTranslated, " + textarea.style.transform)) {
+      return;
+    }
+    lastCharRectTranslated = synthesizeQueryTextRect(textarea.value.length - 1, textarea.value.length);
+    if (!checkQueryContentResult(lastCharRectTranslated,
+          "runCSSTransformTest: lastCharRectTranslated, " + textarea.style.transform)) {
+      return;
+    }
+    firstCharRectTranslatedAsArray = synthesizeQueryTextRectArray(0, 1);
+    if (!checkQueryContentResult(firstCharRectTranslatedAsArray, "runCSSTransformTest: firstCharRectTranslatedAsArray, " + textarea.style.transform) ||
+        !checkRectArray(firstCharRectTranslatedAsArray, [firstCharRectTranslated], "runCSSTransformTest: firstCharRectTranslatedAsArray, " + textarea.style.transform)) {
+      return;
+    }
+    lastCharRectTranslatedAsArray = synthesizeQueryTextRectArray(textarea.value.length - 1, textarea.value.length);
+    if (!checkQueryContentResult(lastCharRectTranslatedAsArray, "runCSSTransformTest: lastCharRectTranslatedAsArray, " + textarea.style.transform) ||
+        !checkRectArray(lastCharRectTranslatedAsArray, [lastCharRectTranslated], "runCSSTransformTest: lastCharRectTranslatedAsArray, " + textarea.style.transform)) {
+      return;
+    }
+
+    textarea.style.transform = "rotate(30deg)";
+    firstCharRectTranslated = synthesizeQueryTextRect(0, 1);
+    if (!checkQueryContentResult(firstCharRectTranslated,
+          "runCSSTransformTest: firstCharRectTranslated, " + textarea.style.transform)) {
+      return;
+    }
+    lastCharRectTranslated = synthesizeQueryTextRect(textarea.value.length - 1, textarea.value.length);
+    if (!checkQueryContentResult(lastCharRectTranslated,
+          "runCSSTransformTest: lastCharRectTranslated, " + textarea.style.transform)) {
+      return;
+    }
+    firstCharRectTranslatedAsArray = synthesizeQueryTextRectArray(0, 1);
+    if (!checkQueryContentResult(firstCharRectTranslatedAsArray, "runCSSTransformTest: firstCharRectTranslatedAsArray, " + textarea.style.transform) ||
+        !checkRectArray(firstCharRectTranslatedAsArray, [firstCharRectTranslated], "runCSSTransformTest: firstCharRectTranslatedAsArray, " + textarea.style.transform)) {
+      return;
+    }
+    lastCharRectTranslatedAsArray = synthesizeQueryTextRectArray(textarea.value.length - 1, textarea.value.length);
+    if (!checkQueryContentResult(lastCharRectTranslatedAsArray, "runCSSTransformTest: lastCharRectTranslatedAsArray, " + textarea.style.transform) ||
+        !checkRectArray(lastCharRectTranslatedAsArray, [lastCharRectTranslated], "runCSSTransformTest: lastCharRectTranslatedAsArray, " + textarea.style.transform)) {
+      return;
+    }
+  } finally {
+    textarea.style.transform = "";
+  }
+}
+
+function runBug722639Test()
+{
+  textarea.focus();
+  textarea.value = "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n";
+  textarea.value += textarea.value;
+  textarea.value += textarea.value; // 80 characters
+
+  let firstLine = synthesizeQueryTextRect(0, 1);
+  if (!checkQueryContentResult(firstLine,
+        "runBug722639Test: firstLine")) {
+    return;
+  }
+  ok(true, "runBug722639Test: 1st line, top=" + firstLine.top + ", left=" + firstLine.left);
+  let firstLineAsArray = synthesizeQueryTextRectArray(0, 1);
+  if (!checkQueryContentResult(firstLineAsArray, "runBug722639Test: 1st line as array") ||
+      !checkRectArray(firstLineAsArray, [firstLine], "runBug722639Test: 1st line as array should match with text rect result")) {
+    return;
+  }
+  if (kLFLen > 1) {
+    let firstLineLF = synthesizeQueryTextRect(1, 1);
+    if (!checkQueryContentResult(firstLineLF,
+          "runBug722639Test: firstLineLF")) {
+      return;
+    }
+    is(firstLineLF.top, firstLine.top, "runBug722639Test: 1st line's \\n rect should be same as 1st line's \\r rect");
+    is(firstLineLF.left, firstLine.left, "runBug722639Test: 1st line's \\n rect should be same as 1st line's \\r rect");
+    isfuzzy(firstLineLF.height, firstLine.height, 1,
+            "runBug722639Test: 1st line's \\n rect should be same as 1st line's \\r rect");
+    is(firstLineLF.width, firstLine.width, "runBug722639Test: 1st line's \\n rect should be same as 1st line's \\r rect");
+    let firstLineLFAsArray = synthesizeQueryTextRectArray(1, 1);
+    if (!checkQueryContentResult(firstLineLFAsArray, "runBug722639Test: 1st line's \\n rect as array") ||
+        !checkRectArray(firstLineLFAsArray, [firstLineLF], "runBug722639Test: 1st line's rect as array should match with text rect result")) {
+      return;
+    }
+  }
+  let secondLine = synthesizeQueryTextRect(kLFLen, 1);
+  if (!checkQueryContentResult(secondLine,
+        "runBug722639Test: secondLine")) {
+    return;
+  }
+  ok(true, "runBug722639Test: 2nd line, top=" + secondLine.top + ", left=" + secondLine.left);
+  let secondLineAsArray = synthesizeQueryTextRectArray(kLFLen, 1);
+  if (!checkQueryContentResult(secondLineAsArray, "runBug722639Test: 2nd line as array") ||
+      !checkRectArray(secondLineAsArray, [secondLine], "runBug722639Test: 2nd line as array should match with text rect result")) {
+    return;
+  }
+  if (kLFLen > 1) {
+    let secondLineLF = synthesizeQueryTextRect(kLFLen + 1, 1);
+    if (!checkQueryContentResult(secondLineLF,
+          "runBug722639Test: secondLineLF")) {
+      return;
+    }
+    is(secondLineLF.top, secondLine.top, "runBug722639Test: 2nd line's \\n rect should be same as 2nd line's \\r rect");
+    is(secondLineLF.left, secondLine.left, "runBug722639Test: 2nd line's \\n rect should be same as 2nd line's \\r rect");
+    isfuzzy(secondLineLF.height, secondLine.height, 1,
+            "runBug722639Test: 2nd line's \\n rect should be same as 2nd line's \\r rect");
+    is(secondLineLF.width, secondLine.width, "runBug722639Test: 2nd line's \\n rect should be same as 2nd line's \\r rect");
+    let secondLineLFAsArray = synthesizeQueryTextRectArray(kLFLen + 1, 1);
+    if (!checkQueryContentResult(secondLineLFAsArray, "runBug722639Test: 2nd line's \\n rect as array") ||
+        !checkRectArray(secondLineLFAsArray, [secondLineLF], "runBug722639Test: 2nd line's rect as array should match with text rect result")) {
+      return;
+    }
+  }
+  let lineHeight = secondLine.top -  firstLine.top;
+  ok(lineHeight > 0,
+     "runBug722639Test: lineHeight must be positive");
+  is(secondLine.left, firstLine.left,
+     "runBug722639Test: the left value must be always same value");
+  isfuzzy(secondLine.height, firstLine.height, 1,
+     "runBug722639Test: the height must be always same value");
+  let previousTop = secondLine.top;
+  for (let i = 3; i <= textarea.value.length + 1; i++) {
+    let currentLine = synthesizeQueryTextRect(kLFLen * (i - 1), 1);
+    if (!checkQueryContentResult(currentLine,
+           "runBug722639Test: " + i + "th currentLine")) {
+      return;
+    }
+    ok(true, "runBug722639Test: " + i + "th line, top=" + currentLine.top + ", left=" + currentLine.left);
+    let currentLineAsArray = synthesizeQueryTextRectArray(kLFLen * (i - 1), 1);
+    if (!checkQueryContentResult(currentLineAsArray, "runBug722639Test: " + i + "th line as array") ||
+        !checkRectArray(currentLineAsArray, [currentLine], "runBug722639Test: " + i + "th line as array should match with text rect result")) {
+      return;
+    }
+    // NOTE: the top position may be 1px larger or smaller than other lines
+    //       due to sub pixel positioning.
+    if (Math.abs(currentLine.top - (previousTop + lineHeight)) <= 1) {
+      ok(true, "runBug722639Test: " + i + "th line's top is expected");
+    } else {
+      is(currentLine.top, previousTop + lineHeight,
+         "runBug722639Test: " + i + "th line's top is unexpected");
+    }
+    is(currentLine.left, firstLine.left,
+       "runBug722639Test: " + i + "th line's left is unexpected");
+    isfuzzy(currentLine.height, firstLine.height, 1,
+            `runBug722639Test: ${i}th line's height is unexpected`);
+    if (kLFLen > 1) {
+      let currentLineLF = synthesizeQueryTextRect(kLFLen * (i - 1) + 1, 1);
+      if (!checkQueryContentResult(currentLineLF,
+            "runBug722639Test: " + i + "th currentLineLF")) {
+        return;
+      }
+      is(currentLineLF.top, currentLine.top, "runBug722639Test: " + i + "th line's \\n rect should be same as same line's \\r rect");
+      is(currentLineLF.left, currentLine.left, "runBug722639Test: " + i + "th line's \\n rect should be same as same line's \\r rect");
+      isfuzzy(currentLineLF.height, currentLine.height, 1,
+              `runBug722639Test: ${i}th line's \\n rect should be same as same line's \\r rect`);
+      is(currentLineLF.width, currentLine.width, "runBug722639Test: " + i + "th line's \\n rect should be same as same line's \\r rect");
+      let currentLineLFAsArray = synthesizeQueryTextRectArray(kLFLen * (i - 1) + 1, 1);
+      if (!checkQueryContentResult(currentLineLFAsArray, "runBug722639Test: " + i + "th line's \\n rect as array") ||
+          !checkRectArray(currentLineLFAsArray, [currentLineLF], "runBug722639Test: " + i + "th line's rect as array should match with text rect result")) {
+        return;
+      }
+    }
+    previousTop = currentLine.top;
+  }
+}
+
+function runForceCommitTest()
+{
+  let events;
+  function eventHandler(aEvent)
+  {
+    events.push(aEvent);
+  }
+  window.addEventListener("compositionstart", eventHandler, true);
+  window.addEventListener("compositionupdate", eventHandler, true);
+  window.addEventListener("compositionend", eventHandler, true);
+  window.addEventListener("beforeinput", eventHandler, true);
+  window.addEventListener("input", eventHandler, true);
+  window.addEventListener("text", eventHandler, true);
+
+  // Make the composition in textarea commit by click in the textarea
+  textarea.focus();
+  textarea.value = "";
+
+  events = [];
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  is(events.length, 5,
+     "runForceCommitTest: wrong event count #1");
+  is(events[0].type, "compositionstart",
+     "runForceCommitTest: the 1st event must be compositionstart #1");
+  is(events[1].type, "compositionupdate",
+     "runForceCommitTest: the 2nd event must be compositionupdate #1");
+  is(events[2].type, "text",
+     "runForceCommitTest: the 3rd event must be text #1");
+  is(events[3].type, "beforeinput",
+     "runForceCommitTest: the 4th event must be beforeinput #1");
+  checkInputEvent(events[3], true, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #1");
+  is(events[4].type, "input",
+     "runForceCommitTest: the 5th event must be input #1");
+  checkInputEvent(events[4], true, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #1");
+
+  events = [];
+  synthesizeMouseAtCenter(textarea, {});
+
+  is(events.length, 4,
+     "runForceCommitTest: wrong event count #2");
+  is(events[0].type, "text",
+     "runForceCommitTest: the 1st event must be text #2");
+  is(events[0].target, textarea,
+     `runForceCommitTest: The "${events[0].type}" event was fired on wrong event target #2`);
+  is(events[1].type, "beforeinput",
+     "runForceCommitTest: the 2nd event must be beforeinput #2");
+  is(events[1].target, textarea,
+     `runForceCommitTest: The "${events[1].type}" event was fired on wrong event target #2`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #2");
+  is(events[2].type, "compositionend",
+     "runForceCommitTest: the 3rd event must be compositionend #2");
+  is(events[2].target, textarea,
+     `runForceCommitTest: The "${events[2].type}" event was fired on wrong event target #2`);
+  is(events[2].data, "\u306E",
+     "runForceCommitTest: compositionend has wrong data #2");
+  is(events[3].type, "input",
+     "runForceCommitTest: the 4th event must be input #2");
+  is(events[3].target, textarea,
+     `runForceCommitTest: The "${events[3].type}" event was fired on wrong event target #2`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #2");
+  ok(!getEditor(textarea).isComposing,
+     "runForceCommitTest: the textarea still has composition #2");
+  is(textarea.value, "\u306E",
+     "runForceCommitTest: the textarea doesn't have the committed text #2");
+
+  // Make the composition in textarea commit by click in another editor (input)
+  textarea.focus();
+  textarea.value = "";
+  input.value = "";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  synthesizeMouseAtCenter(input, {});
+
+  is(events.length, 4,
+     "runForceCommitTest: wrong event count #3");
+  is(events[0].type, "text",
+     "runForceCommitTest: the 1st event must be text #3");
+  is(events[0].target, textarea,
+     `runForceCommitTest: The "${events[0].type}" event was fired on wrong event target #3`);
+  is(events[1].type, "beforeinput",
+     "runForceCommitTest: the 2nd event must be beforeinput #3");
+  is(events[1].target, textarea,
+     `runForceCommitTest: The "${events[1].type}" event was fired on wrong event target #3`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #3");
+  is(events[2].type, "compositionend",
+     "runForceCommitTest: the 3rd event must be compositionend #3");
+  is(events[2].target, textarea,
+     `runForceCommitTest: The "${events[2].type}" event was fired on wrong event target #3`);
+  is(events[2].data, "\u306E",
+     "runForceCommitTest: compositionend has wrong data #3");
+  is(events[3].type, "input",
+     "runForceCommitTest: the 4th event must be input #3");
+  is(events[3].target, textarea,
+     `runForceCommitTest: The "${events[3].type}" event was fired on wrong event target #3`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #3");
+  ok(!getEditor(textarea).isComposing,
+     "runForceCommitTest: the textarea still has composition #3");
+  ok(!getEditor(input).isComposing,
+     "runForceCommitTest: the input has composition #3");
+  is(textarea.value, "\u306E",
+     "runForceCommitTest: the textarea doesn't have the committed text #3");
+  is(input.value, "",
+     "runForceCommitTest: the input has the committed text? #3");
+
+  // Make the composition in textarea commit by blur()
+  textarea.focus();
+  textarea.value = "";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  textarea.blur();
+
+  is(events.length, 4,
+     "runForceCommitTest: wrong event count #4");
+  is(events[0].type, "text",
+     "runForceCommitTest: the 1st event must be text #4");
+  is(events[0].target, textarea,
+     `runForceCommitTest: The "${events[0].type}" event was fired on wrong event target #4`);
+  is(events[1].type, "beforeinput",
+     "runForceCommitTest: the 2nd event must be beforeinput #4");
+  is(events[1].target, textarea,
+     `runForceCommitTest: The "${events[1].type}" event was fired on wrong event target #4`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #4");
+  is(events[2].type, "compositionend",
+     "runForceCommitTest: the 3rd event must be compositionend #4");
+  is(events[2].target, textarea,
+     `runForceCommitTest: The "${events[2].type}" event was fired on wrong event target #4`);
+  is(events[2].data, "\u306E",
+     "runForceCommitTest: compositionend has wrong data #4");
+  is(events[3].type, "input",
+     "runForceCommitTest: the 4th event must be input #4");
+  is(events[3].target, textarea,
+     `runForceCommitTest: The "${events[3].type}" event was fired on wrong event target #4`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #4");
+  ok(!getEditor(textarea).isComposing,
+     "runForceCommitTest: the textarea still has composition #4");
+  is(textarea.value, "\u306E",
+     "runForceCommitTest: the textarea doesn't have the committed text #4");
+
+  // Make the composition in textarea commit by input.focus()
+  textarea.focus();
+  textarea.value = "";
+  input.value = "";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  input.focus();
+
+  is(events.length, 4,
+     "runForceCommitTest: wrong event count #5");
+  is(events[0].type, "text",
+     "runForceCommitTest: the 1st event must be text #5");
+  is(events[0].target, textarea,
+     `runForceCommitTest: The "${events[0].type}" event was fired on wrong event target #5`);
+  is(events[1].type, "beforeinput",
+     "runForceCommitTest: the 2nd event must be beforeinput #5");
+  is(events[1].target, textarea,
+     `runForceCommitTest: The "${events[1].type}" event was fired on wrong event target #5`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #5");
+  is(events[2].type, "compositionend",
+     "runForceCommitTest: the 3rd event must be compositionend #5");
+  is(events[2].target, textarea,
+     `runForceCommitTest: The "${events[2].type}" event was fired on wrong event target #5`);
+  is(events[2].data, "\u306E",
+     "runForceCommitTest: compositionend has wrong data #5");
+  is(events[3].type, "input",
+     "runForceCommitTest: the 4th event must be input #5");
+  is(events[3].target, textarea,
+     `runForceCommitTest: The "${events[3].type}" event was fired on wrong event target #5`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #5");
+  ok(!getEditor(textarea).isComposing,
+     "runForceCommitTest: the textarea still has composition #5");
+  ok(!getEditor(input).isComposing,
+     "runForceCommitTest: the input has composition #5");
+  is(textarea.value, "\u306E",
+     "runForceCommitTest: the textarea doesn't have the committed text #5");
+  is(input.value, "",
+     "runForceCommitTest: the input has the committed text? #5");
+
+  // Make the composition in textarea commit by click in another document's editor
+  textarea.focus();
+  textarea.value = "";
+  textareaInFrame.value = "";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  synthesizeMouseAtCenter(textareaInFrame, {}, iframe.contentWindow);
+
+  is(events.length, 4,
+     "runForceCommitTest: wrong event count #6");
+  is(events[0].type, "text",
+     "runForceCommitTest: the 1st event must be text #6");
+  is(events[0].target, textarea,
+     `runForceCommitTest: The "${events[0].type}" event was fired on wrong event target #6`);
+  is(events[1].type, "beforeinput",
+     "runForceCommitTest: the 2nd event must be beforeinput #6");
+  is(events[1].target, textarea,
+     `runForceCommitTest: The "${events[1].type}" event was fired on wrong event target #6`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #6");
+  is(events[2].type, "compositionend",
+     "runForceCommitTest: the 3rd event must be compositionend #6");
+  is(events[2].target, textarea,
+     `runForceCommitTest: The "${events[2].type}" event was fired on wrong event target #6`);
+  is(events[2].data, "\u306E",
+     "runForceCommitTest: compositionend has wrong data #6");
+  is(events[3].type, "input",
+     "runForceCommitTest: the 4th event must be input #6");
+  is(events[3].target, textarea,
+     `runForceCommitTest: The "${events[3].type}" event was fired on wrong event target #6`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #6");
+  ok(!getEditor(textarea).isComposing,
+     "runForceCommitTest: the textarea still has composition #6");
+  ok(!getEditor(textareaInFrame).isComposing,
+     "runForceCommitTest: the textarea in frame has composition #6");
+  is(textarea.value, "\u306E",
+     "runForceCommitTest: the textarea doesn't have the committed text #6");
+  is(textareaInFrame.value, "",
+     "runForceCommitTest: the textarea in frame has the committed text? #6");
+
+  // Make the composition in textarea commit by another document's editor's focus()
+  textarea.focus();
+  textarea.value = "";
+  textareaInFrame.value = "";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  textareaInFrame.focus();
+
+  is(events.length, 4,
+     "runForceCommitTest: wrong event count #7");
+  is(events[0].type, "text",
+     "runForceCommitTest: the 1st event must be text #7");
+  is(events[0].target, textarea,
+     `runForceCommitTest: The "${events[0].type}" event was fired on wrong event target #7`);
+  is(events[1].type, "beforeinput",
+     "runForceCommitTest: the 2nd event must be beforeinput #7");
+  is(events[1].target, textarea,
+     `runForceCommitTest: The "${events[1].type}" event was fired on wrong event target #7`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #7");
+  is(events[2].type, "compositionend",
+     "runForceCommitTest: the 3rd event must be compositionend #7");
+  is(events[2].target, textarea,
+     `runForceCommitTest: The "${events[2].type}" event was fired on wrong event target #7`);
+  is(events[2].data, "\u306E",
+     "runForceCommitTest: compositionend has wrong data #7");
+  is(events[3].type, "input",
+     "runForceCommitTest: the 4th event must be input #7");
+  is(events[3].target, textarea,
+     `runForceCommitTest: The "${events[3].type}" event was fired on wrong event target #7`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #7");
+  ok(!getEditor(textarea).isComposing,
+     "runForceCommitTest: the textarea still has composition #7");
+  ok(!getEditor(textareaInFrame).isComposing,
+     "runForceCommitTest: the textarea in frame has composition #7");
+  is(textarea.value, "\u306E",
+     "runForceCommitTest: the textarea doesn't have the committed text #7");
+  is(textareaInFrame.value, "",
+     "runForceCommitTest: the textarea in frame has the committed text? #7");
+
+  // Make the composition in a textarea commit by click in another editable document
+  textarea.focus();
+  textarea.value = "";
+  iframe2.contentDocument.body.innerHTML = "Text in the Body";
+  let iframe2BodyInnerHTML = iframe2.contentDocument.body.innerHTML;
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  synthesizeMouseAtCenter(iframe2.contentDocument.body, {}, iframe2.contentWindow);
+
+  is(events.length, 4,
+     "runForceCommitTest: wrong event count #8");
+  is(events[0].type, "text",
+     "runForceCommitTest: the 1st event must be text #8");
+  is(events[0].target, textarea,
+     `runForceCommitTest: The ${events[0].type} event was fired on wrong event target #8`);
+  is(events[1].type, "beforeinput",
+     "runForceCommitTest: the 2nd event must be beforeinput #8");
+  is(events[1].target, textarea,
+     `runForceCommitTest: The ${events[1].type} event was fired on wrong event target #8`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #8");
+  is(events[2].type, "compositionend",
+     "runForceCommitTest: the 3rd event must be compositionend #8");
+  is(events[2].target, textarea,
+     `runForceCommitTest: The ${events[2].type} event was fired on wrong event target #8`);
+  is(events[2].data, "\u306E",
+     "runForceCommitTest: compositionend has wrong data #8");
+  is(events[3].type, "input",
+     "runForceCommitTest: the 4th event must be input #8");
+  is(events[3].target, textarea,
+     `runForceCommitTest: The ${events[3].type} event was fired on wrong event target #8`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #8");
+  ok(!getEditor(textarea).isComposing,
+     "runForceCommitTest: the textarea still has composition #8");
+  ok(!getHTMLEditorIMESupport(iframe2.contentWindow).isComposing,
+     "runForceCommitTest: the editable document has composition #8");
+  is(textarea.value, "\u306E",
+     "runForceCommitTest: the textarea doesn't have the committed text #8");
+  is(iframe2.contentDocument.body.innerHTML, iframe2BodyInnerHTML,
+     "runForceCommitTest: the editable document has the committed text? #8");
+
+  // Make the composition in an editable document commit by click in it
+  iframe2.contentWindow.focus();
+  iframe2.contentDocument.body.innerHTML = "Text in the Body";
+  iframe2BodyInnerHTML = iframe2.contentDocument.body.innerHTML;
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    }, iframe2.contentWindow);
+
+  events = [];
+  synthesizeMouseAtCenter(iframe2.contentDocument.body, {}, iframe2.contentWindow);
+
+  is(events.length, 4,
+     "runForceCommitTest: wrong event count #9");
+  is(events[0].type, "text",
+     "runForceCommitTest: the 1st event must be text #9");
+  is(events[0].target, iframe2.contentDocument.body,
+     `runForceCommitTest: The "${events[0].type}" event was fired on wrong event target #9`);
+  is(events[1].type, "beforeinput",
+     "runForceCommitTest: the 2nd event must be beforeinput #9");
+  is(events[1].target, iframe2.contentDocument.body,
+     `runForceCommitTest: The "${events[1].type}" event was fired on wrong event target #9`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E",
+                  [{startContainer: iframe2.contentDocument.body.firstChild,
+                    startOffset: iframe2.contentDocument.body.firstChild.wholeText.indexOf("\u306E"),
+                    endContainer: iframe2.contentDocument.body.firstChild,
+                    endOffset: iframe2.contentDocument.body.firstChild.wholeText.indexOf("\u306E") + 1}],
+                  "runForceCommitTest #9");
+  is(events[2].type, "compositionend",
+     "runForceCommitTest: the 3rd event must be compositionend #9");
+  is(events[2].target, iframe2.contentDocument.body,
+     `runForceCommitTest: The "${events[2].type}" event was fired on wrong event target #9`);
+  is(events[2].data, "\u306E",
+     "runForceCommitTest: compositionend has wrong data #9");
+  is(events[3].type, "input",
+     "runForceCommitTest: the 4th event must be input #9");
+  is(events[3].target, iframe2.contentDocument.body,
+     `runForceCommitTest: The "${events[3].type}" event was fired on wrong event target #9`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #9");
+  ok(!getHTMLEditorIMESupport(iframe2.contentWindow).isComposing,
+     "runForceCommitTest: the editable document still has composition #9");
+  ok(iframe2.contentDocument.body.innerHTML != iframe2BodyInnerHTML &&
+     iframe2.contentDocument.body.innerHTML.includes("\u306E"),
+     "runForceCommitTest: the editable document doesn't have the committed text #9");
+
+  // Make the composition in an editable document commit by click in another document's editor
+  textarea.value = "";
+  iframe2.contentWindow.focus();
+  iframe2.contentDocument.body.innerHTML = "Text in the Body";
+  iframe2BodyInnerHTML = iframe2.contentDocument.body.innerHTML;
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    }, iframe2.contentWindow);
+
+  events = [];
+  synthesizeMouseAtCenter(textarea, {});
+
+  is(events.length, 4,
+     "runForceCommitTest: wrong event count #10");
+  is(events[0].type, "text",
+     "runForceCommitTest: the 1st event must be text #10");
+  is(events[0].target, iframe2.contentDocument.body,
+     `runForceCommitTest: The ${events[0].type} event was fired on wrong event target #10`);
+  is(events[1].type, "beforeinput",
+     "runForceCommitTest: the 2nd event must be beforeinput #10");
+  is(events[1].target, iframe2.contentDocument.body,
+     `runForceCommitTest: The ${events[1].type} event was fired on wrong event target #10`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E",
+                  [{startContainer: iframe2.contentDocument.body.firstChild,
+                    startOffset: iframe2.contentDocument.body.firstChild.wholeText.indexOf("\u306E"),
+                    endContainer: iframe2.contentDocument.body.firstChild,
+                    endOffset: iframe2.contentDocument.body.firstChild.wholeText.indexOf("\u306E") + 1}],
+                  "runForceCommitTest #10");
+  is(events[2].type, "compositionend",
+     "runForceCommitTest: the 3rd event must be compositionend #10");
+  is(events[2].target, iframe2.contentDocument.body,
+     `runForceCommitTest: The ${events[2].type} event was fired on wrong event target #10`);
+  is(events[2].data, "\u306E",
+     "runForceCommitTest: compositionend has wrong data #10");
+  is(events[3].type, "input",
+     "runForceCommitTest: the 4th event must be input #10");
+  is(events[3].target, iframe2.contentDocument.body,
+     `runForceCommitTest: The ${events[3].type} event was fired on wrong event target #10`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #10");
+  ok(!getHTMLEditorIMESupport(iframe2.contentWindow).isComposing,
+     "runForceCommitTest: the editable document still has composition #10");
+  ok(!getEditor(textarea).isComposing,
+     "runForceCommitTest: the textarea has composition #10");
+  ok(iframe2.contentDocument.body.innerHTML != iframe2BodyInnerHTML &&
+     iframe2.contentDocument.body.innerHTML.includes("\u306E"),
+     "runForceCommitTest: the editable document doesn't have the committed text #10");
+  is(textarea.value, "",
+     "runForceCommitTest: the textarea has the committed text? #10");
+
+  // Make the composition in an editable document commit by click in the another editable document
+  iframe2.contentWindow.focus();
+  iframe2.contentDocument.body.innerHTML = "Text in the Body";
+  iframe2BodyInnerHTML = iframe2.contentDocument.body.innerHTML;
+  iframe3.contentDocument.body.innerHTML = "Text in the Body";
+  let iframe3BodyInnerHTML = iframe2.contentDocument.body.innerHTML;
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    }, iframe2.contentWindow);
+
+  events = [];
+  synthesizeMouseAtCenter(iframe3.contentDocument.body, {}, iframe3.contentWindow);
+
+  is(events.length, 4,
+     "runForceCommitTest: wrong event count #11");
+  is(events[0].type, "text",
+     "runForceCommitTest: the 1st event must be text #11");
+  is(events[0].target, iframe2.contentDocument.body,
+     `runForceCommitTest: The "${events[0].type}" event was fired on wrong event target #11`);
+  is(events[1].type, "beforeinput",
+     "runForceCommitTest: the 2nd event must be beforeinput #11");
+  is(events[1].target, iframe2.contentDocument.body,
+     `runForceCommitTest: The "${events[1].type}" event was fired on wrong event target #11`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E",
+                  [{startContainer: iframe2.contentDocument.body.firstChild,
+                    startOffset: iframe2.contentDocument.body.firstChild.wholeText.indexOf("\u306E"),
+                    endContainer: iframe2.contentDocument.body.firstChild,
+                    endOffset: iframe2.contentDocument.body.firstChild.wholeText.indexOf("\u306E") + 1}],
+                  "runForceCommitTest #11");
+  is(events[2].type, "compositionend",
+     "runForceCommitTest: the 3rd event must be compositionend #11");
+  is(events[2].target, iframe2.contentDocument.body,
+     `runForceCommitTest: The "${events[2].type}" event was fired on wrong event target #11`);
+  is(events[2].data, "\u306E",
+     "runForceCommitTest: compositionend has wrong data #11");
+  is(events[3].type, "input",
+     "runForceCommitTest: the 4th event must be input #11");
+  is(events[3].target, iframe2.contentDocument.body,
+     `runForceCommitTest: The "${events[3].type}" event was fired on wrong event target #11`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #11");
+  ok(!getHTMLEditorIMESupport(iframe2.contentWindow).isComposing,
+     "runForceCommitTest: the editable document still has composition #11");
+  ok(!getHTMLEditorIMESupport(iframe3.contentWindow).isComposing,
+     "runForceCommitTest: the other editable document has composition #11");
+  ok(iframe2.contentDocument.body.innerHTML != iframe2BodyInnerHTML &&
+     iframe2.contentDocument.body.innerHTML.includes("\u306E"),
+     "runForceCommitTest: the editable document doesn't have the committed text #11");
+  is(iframe3.contentDocument.body.innerHTML, iframe3BodyInnerHTML,
+     "runForceCommitTest: the other editable document has the committed text? #11");
+
+  input.focus();
+  input.value = "";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  input.value = "set value";
+
+  is(events.length, 4,
+     "runForceCommitTest: wrong event count #12");
+  is(events[0].type, "text",
+     "runForceCommitTest: the 1st event must be text #12");
+  is(events[0].target, input,
+     `runForceCommitTest: The "${events[0].type}" event was fired on wrong event target #12`);
+  is(events[1].type, "beforeinput",
+     "runForceCommitTest: the 2nd event must be beforeinput #12");
+  is(events[1].target, input,
+     `runForceCommitTest: The "${events[1].type}" event was fired on wrong event target #12`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #12");
+  is(events[2].type, "compositionend",
+     "runForceCommitTest: the 3rd event must be compositionend #12");
+  is(events[2].target, input,
+     `runForceCommitTest: The "${events[2].type}" event was fired on wrong event target #12`);
+  is(events[2].data, "\u306E",
+     "runForceCommitTest: compositionend has wrong data #12");
+  is(events[3].type, "input",
+     "runForceCommitTest: the 4th event must be input #12");
+  is(events[3].target, input,
+     `runForceCommitTest: The "${events[3].type}" event was fired on wrong event target #12`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #12");
+  ok(!getEditor(input).isComposing,
+     "runForceCommitTest: the input still has composition #12");
+  is(input.value, "set value",
+     "runForceCommitTest: the input doesn't have the set text #12");
+
+  textarea.focus();
+  textarea.value = "";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  textarea.value = "set value";
+
+  is(events.length, 4,
+     "runForceCommitTest: wrong event count #13");
+  is(events[0].type, "text",
+     "runForceCommitTest: the 1st event must be text #13");
+  is(events[0].target, textarea,
+     `runForceCommitTest: The "${events[0].type}" event was fired on wrong event target #13`);
+  is(events[1].type, "beforeinput",
+     "runForceCommitTest: the 2nd event must be beforeinput #13");
+  is(events[1].target, textarea,
+     `runForceCommitTest: The "${events[1].type}" event was fired on wrong event target #13`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #13");
+  is(events[2].type, "compositionend",
+     "runForceCommitTest: the 3rd event must be compositionend #13");
+  is(events[2].target, textarea,
+     `runForceCommitTest: The "${events[2].type}" event was fired on wrong event target #13`);
+  is(events[2].data, "\u306E",
+     "runForceCommitTest: compositionend has wrong data #13");
+  is(events[3].type, "input",
+     "runForceCommitTest: the 4th event must be input #13");
+  is(events[3].target, textarea,
+     `runForceCommitTest: The "${events[3].type}" event was fired on wrong event target #13`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #13");
+  ok(!getEditor(textarea).isComposing,
+     "runForceCommitTest: the textarea still has composition #13");
+  is(textarea.value, "set value",
+     "runForceCommitTest: the textarea doesn't have the set text #13");
+
+  input.focus();
+  input.value = "";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  input.value += " appended value";
+
+  is(events.length, 4,
+     "runForceCommitTest: wrong event count #14");
+  is(events[0].type, "text",
+     "runForceCommitTest: the 1st event must be text #14");
+  is(events[0].target, input,
+     `runForceCommitTest: The "${events[0].type}" event was fired on wrong event target #14`);
+  is(events[1].type, "beforeinput",
+     "runForceCommitTest: the 2nd event must be beforeinput #14");
+  is(events[1].target, input,
+     `runForceCommitTest: The "${events[1].type}" event was fired on wrong event target #14`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #14");
+  is(events[2].type, "compositionend",
+     "runForceCommitTest: the 3rd event must be compositionend #14");
+  is(events[2].target, input,
+     `runForceCommitTest: The "${events[2].type}" event was fired on wrong event target #14`);
+  is(events[2].data, "\u306E",
+     "runForceCommitTest: compositionend has wrong data #14");
+  is(events[3].type, "input",
+     "runForceCommitTest: the 4th event must be input #14");
+  is(events[3].target, input,
+     `runForceCommitTest: The "${events[3].type}" event was fired on wrong event target #14`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runForceCommitTest #14");
+  ok(!getEditor(input).isComposing,
+     "runForceCommitTest: the input still has composition #14");
+  is(input.value, "\u306E appended value",
+     "runForceCommitTest: the input should have both composed text and appended text #14");
+
+  input.focus();
+  input.value = "abcd";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  input.value = "abcd\u306E";
+
+  is(events.length, 0,
+     "runForceCommitTest: setting same value to input with composition shouldn't cause any events #15");
+  is(input.value, "abcd\u306E",
+     "runForceCommitTest: the input has unexpected value #15");
+
+  input.blur(); // commit composition
+
+  textarea.focus();
+  textarea.value = "abcd";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  textarea.value = "abcd\u306E";
+
+  is(events.length, 0,
+     "runForceCommitTest: setting same value to textarea with composition shouldn't cause any events #16");
+  is(textarea.value, "abcd\u306E",
+     "runForceCommitTest: the input has unexpected value #16");
+
+  textarea.blur(); // commit composition
+
+  window.removeEventListener("compositionstart", eventHandler, true);
+  window.removeEventListener("compositionupdate", eventHandler, true);
+  window.removeEventListener("compositionend", eventHandler, true);
+  window.removeEventListener("beforeinput", eventHandler, true);
+  window.removeEventListener("input", eventHandler, true);
+  window.removeEventListener("text", eventHandler, true);
+}
+
+function runNestedSettingValue()
+{
+  let isTesting = false;
+  let events = [];
+  function eventHandler(aEvent)
+  {
+    events.push(aEvent);
+    if (isTesting) {
+      aEvent.target.value += aEvent.type + ", ";
+    }
+  }
+  window.addEventListener("compositionstart", eventHandler, true);
+  window.addEventListener("compositionupdate", eventHandler, true);
+  window.addEventListener("compositionend", eventHandler, true);
+  window.addEventListener("beforeinput", eventHandler, true);
+  window.addEventListener("input", eventHandler, true);
+  window.addEventListener("text", eventHandler, true);
+
+  textarea.focus();
+  textarea.value = "";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  isTesting = true;
+  textarea.value = "first setting value, ";
+  isTesting = false;
+
+  is(events.length, 4,
+     "runNestedSettingValue: wrong event count #1");
+  is(events[0].type, "text",
+     "runNestedSettingValue: the 1st event must be text #1");
+  is(events[0].target, textarea,
+     `runNestedSettingValue: The "${events[0].type}" event was fired on wrong event target #1`);
+  is(events[1].type, "beforeinput",
+     "runNestedSettingValue: the 2nd event must be beforeinput #1");
+  is(events[1].target, textarea,
+     `runNestedSettingValue: The "${events[1].type}" event was fired on wrong event target #1`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runNestedSettingValue #1");
+  is(events[2].type, "compositionend",
+     "runNestedSettingValue: the 3rd event must be compositionend #1");
+  is(events[2].target, textarea,
+     `runNestedSettingValue: The "${events[2].type}" event was fired on wrong event target #1`);
+  is(events[2].data, "\u306E",
+     "runNestedSettingValue: compositionend has wrong data #1");
+  is(events[3].type, "input",
+     "runNestedSettingValue: the 4th event must be input #1");
+  is(events[3].target, textarea,
+     `runNestedSettingValue: The "${events[3].type}" event was fired on wrong event target #1`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runNestedSettingValue #1");
+  ok(!getEditor(textarea).isComposing,
+     "runNestedSettingValue: the textarea still has composition #1");
+  is(textarea.value, "first setting value, text, beforeinput, compositionend, input, ",
+     "runNestedSettingValue: the textarea should have all string set to value attribute");
+
+  input.focus();
+  input.value = "";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  isTesting = true;
+  input.value = "first setting value, ";
+  isTesting = false;
+
+  is(events.length, 4,
+     "runNestedSettingValue: wrong event count #2");
+  is(events[0].type, "text",
+     "runNestedSettingValue: the 1st event must be text #2");
+  is(events[0].target, input,
+     `runNestedSettingValue: The "${events[0].type}" event was fired on wrong event target #2`);
+  is(events[1].type, "beforeinput",
+     "runNestedSettingValue: the 2nd event must be beforeinput #2");
+  is(events[1].target, input,
+     `runNestedSettingValue: The "${events[1].type}" event was fired on wrong event target #2`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runNestedSettingValue #2");
+  is(events[2].type, "compositionend",
+     "runNestedSettingValue: the 3rd event must be compositionend #2");
+  is(events[2].target, input,
+     `runNestedSettingValue: The "${events[2].type}" event was fired on wrong event target #2`);
+  is(events[2].data, "\u306E",
+     "runNestedSettingValue: compositionend has wrong data #2");
+  is(events[3].type, "input",
+     "runNestedSettingValue: the 4th event must be input #2");
+  is(events[3].target, input,
+     `runNestedSettingValue: The "${events[3].type}" event was fired on wrong event target #2`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runNestedSettingValue #2");
+  ok(!getEditor(input).isComposing,
+     "runNestedSettingValue: the input still has composition #2");
+  is(textarea.value, "first setting value, text, beforeinput, compositionend, input, ",
+     "runNestedSettingValue: the input should have all string set to value attribute #2");
+
+  textarea.focus();
+  textarea.value = "";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  isTesting = true;
+  textarea.setRangeText("first setting value, ");
+  isTesting = false;
+
+  is(events.length, 4,
+     "runNestedSettingValue: wrong event count #3");
+  is(events[0].type, "text",
+     "runNestedSettingValue: the 1st event must be text #3");
+  is(events[0].target, textarea,
+     `runNestedSettingValue: The ${events[0].type} event was fired on wrong event target #3`);
+  is(events[1].type, "beforeinput",
+     "runNestedSettingValue: the 2nd event must be beforeinput #3");
+  is(events[1].target, textarea,
+     `runNestedSettingValue: The ${events[1].type} event was fired on wrong event target #3`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runNestedSettingValue #3");
+  is(events[2].type, "compositionend",
+     "runNestedSettingValue: the 3rd event must be compositionend #3");
+  is(events[2].target, textarea,
+     `runNestedSettingValue: The ${events[2].type} event was fired on wrong event target #3`);
+  is(events[2].data, "\u306E",
+     "runNestedSettingValue: compositionend has wrong data #3");
+  is(events[3].type, "input",
+     "runNestedSettingValue: the 4th event must be input #3");
+  is(events[3].target, textarea,
+     `runNestedSettingValue: The ${events[3].type} event was fired on wrong event target #3`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runNestedSettingValue #3");
+  ok(!getEditor(textarea).isComposing,
+     "runNestedSettingValue: the textarea still has composition #3");
+  is(textarea.value, "\u306Efirst setting value, text, beforeinput, compositionend, input, ",
+     "runNestedSettingValue: the textarea should have appended by setRangeText() and all string set to value attribute #3");
+
+  input.focus();
+  input.value = "";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  events = [];
+  isTesting = true;
+  input.setRangeText("first setting value, ");
+  isTesting = false;
+
+  is(events.length, 4,
+     "runNestedSettingValue: wrong event count #4");
+  is(events[0].type, "text",
+     "runNestedSettingValue: the 1st event must be text #4");
+  is(events[0].target, input,
+     `runNestedSettingValue: The "${events[0].type}" event was fired on wrong event target #4`);
+  is(events[1].type, "beforeinput",
+     "runNestedSettingValue: the 2nd event must be beforeinput #4");
+  is(events[1].target, input,
+     `runNestedSettingValue: The "${events[1].type}" event was fired on wrong event target #4`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runNestedSettingValue #4");
+  is(events[2].type, "compositionend",
+     "runNestedSettingValue: the 3rd event must be compositionend #4");
+  is(events[2].target, input,
+     `runNestedSettingValue: The "${events[2].type}" event was fired on wrong event target #4`);
+  is(events[2].data, "\u306E",
+     "runNestedSettingValue: compositionend has wrong data #4");
+  is(events[3].type, "input",
+     "runNestedSettingValue: the 4th event must be input #4");
+  is(events[3].target, input,
+     `runNestedSettingValue: The "${events[3].type}" event was fired on wrong event target #4`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runNestedSettingValue #4");
+  ok(!getEditor(input).isComposing,
+     "runNestedSettingValue: the input still has composition #4");
+  is(textarea.value, "\u306Efirst setting value, text, beforeinput, compositionend, input, ",
+     "runNestedSettingValue: the input should have all string appended by setRangeText() and set to value attribute #4");
+
+  window.removeEventListener("compositionstart", eventHandler, true);
+  window.removeEventListener("compositionupdate", eventHandler, true);
+  window.removeEventListener("compositionend", eventHandler, true);
+  window.removeEventListener("beforeinput", eventHandler, true);
+  window.removeEventListener("input", eventHandler, true);
+  window.removeEventListener("text", eventHandler, true);
+
+}
+
+async function runAsyncForceCommitTest()
+{
+  let events;
+  function eventHandler(aEvent)
+  {
+    events.push(aEvent);
+  };
+
+  // If IME commits composition for a request, TextComposition commits
+  // composition automatically because most web apps must expect that active
+  // composition should be committed synchronously.  Therefore, in this case,
+  // a click during composition should cause committing composition
+  // synchronously and delayed commit shouldn't cause composition events.
+  let commitRequested = false;
+  let onFinishTest = null;
+  function callback(aTIP, aNotification)
+  {
+    ok(true, aNotification.type);
+    if (aNotification.type != "request-to-commit") {
+      return true;
+    }
+    commitRequested = true;
+    if (onFinishTest) {
+      let resolve = onFinishTest;
+      onFinishTest = null;
+
+      SimpleTest.executeSoon(() => {
+        events = [];
+        aTIP.commitComposition();
+
+        is(events.length, 0,
+           "runAsyncForceCommitTest: composition events shouldn't been fired by asynchronous call of nsITextInputProcessor.commitComposition()");
+
+        SimpleTest.executeSoon(resolve);
+      });
+    }
+    return true;
+  };
+
+  function promiseCleanUp() {
+    return new Promise(resolve => { onFinishTest = resolve; });
+  }
+
+  window.addEventListener("compositionstart", eventHandler, true);
+  window.addEventListener("compositionupdate", eventHandler, true);
+  window.addEventListener("compositionend", eventHandler, true);
+  window.addEventListener("beforeinput", eventHandler, true);
+  window.addEventListener("input", eventHandler, true);
+  window.addEventListener("text", eventHandler, true);
+
+  // Make the composition in textarea commit by click in the textarea
+  textarea.focus();
+  textarea.value = "";
+
+  events = [];
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    }, window, callback);
+
+  is(events.length, 5,
+     "runAsyncForceCommitTest: wrong event count #1");
+  is(events[0].type, "compositionstart",
+     "runAsyncForceCommitTest: the 1st event must be compositionstart #1");
+  is(events[1].type, "compositionupdate",
+     "runAsyncForceCommitTest: the 2nd event must be compositionupdate #1");
+  is(events[2].type, "text",
+     "runAsyncForceCommitTest: the 3rd event must be text #1");
+  is(events[3].type, "beforeinput",
+     "runAsyncForceCommitTest: the 4th event must be beforeinput #1");
+  checkInputEvent(events[3], true, "insertCompositionText", "\u306E", [],
+                  "runAsyncForceCommitTest #1");
+  is(events[4].type, "input",
+     "runAsyncForceCommitTest: the 5th event must be input #1");
+  checkInputEvent(events[4], true, "insertCompositionText", "\u306E", [],
+                  "runAsyncForceCommitTest #1");
+
+  events = [];
+  let waitCleanState = promiseCleanUp();
+
+  synthesizeMouseAtCenter(textarea, {});
+
+  ok(commitRequested,
+     "runAsyncForceCommitTest: \"request-to-commit\" should've been notified");
+  is(events.length, 4,
+     "runAsyncForceCommitTest: wrong event count #2");
+  is(events[0].type, "text",
+     "runAsyncForceCommitTest: the 1st event must be text #2");
+  is(events[0].target, textarea,
+     `runAsyncForceCommitTest: The "${events[0].type}" event was fired on wrong event target #2`);
+  is(events[1].type, "beforeinput",
+     "runAsyncForceCommitTest: the 2nd event must be beforeinput #2");
+  is(events[1].target, textarea,
+     `runAsyncForceCommitTest: The "${events[1].type}" event was fired on wrong event target #2`);
+  checkInputEvent(events[1], true, "insertCompositionText", "\u306E", [],
+                  "runAsyncForceCommitTest #2");
+  is(events[2].type, "compositionend",
+     "runAsyncForceCommitTest: the 3rd event must be compositionend #2");
+  is(events[2].target, textarea,
+     `runAsyncForceCommitTest: The "${events[2].type}" event was fired on wrong event target #2`);
+  is(events[2].data, "\u306E",
+     "runAsyncForceCommitTest: compositionend has wrong data #2");
+  is(events[3].type, "input",
+     "runAsyncForceCommitTest: the 4th event must be input #2");
+  is(events[3].target, textarea,
+     `runAsyncForceCommitTest: The "${events[3].type}" event was fired on wrong event target #2`);
+  checkInputEvent(events[3], false, "insertCompositionText", "\u306E", [],
+                  "runAsyncForceCommitTest #2");
+  ok(!getEditor(textarea).isComposing,
+     "runAsyncForceCommitTest: the textarea still has composition #2");
+  is(textarea.value, "\u306E",
+     "runAsyncForceCommitTest: the textarea doesn't have the committed text #2");
+
+  await waitCleanState;
+
+  window.removeEventListener("compositionstart", eventHandler, true);
+  window.removeEventListener("compositionupdate", eventHandler, true);
+  window.removeEventListener("compositionend", eventHandler, true);
+  window.removeEventListener("beforeinput", eventHandler, true);
+  window.removeEventListener("input", eventHandler, true);
+  window.removeEventListener("text", eventHandler, true);
+}
+
+function runBug811755Test()
+{
+  iframe2.contentDocument.body.innerHTML = "<div>content<br/></div>";
+  iframe2.contentWindow.focus();
+  // Query everything
+  let textContent = synthesizeQueryTextContent(0, 10);
+  if (!checkQueryContentResult(textContent, "runBug811755Test: synthesizeQueryTextContent #1")) {
+    return;
+  }
+  // Query everything but specify exact end offset, which should be immediately after the <br> node
+  // If PreContentIterator is used, the next node after <br> is the node after </div>.
+  // If ContentIterator is used, the next node is the <div> node itself. In this case, the end
+  // node ends up being before the start node, and an empty string is returned.
+  let queryContent = synthesizeQueryTextContent(0, textContent.text.length);
+  if (!checkQueryContentResult(queryContent, "runBug811755Test: synthesizeQueryTextContent #2")) {
+    return;
+  }
+  is(queryContent.text, textContent.text, "runBug811755Test: two queried texts don't match");
+}
+
+function runIsComposingTest()
+{
+  let expectedIsComposing = false;
+  let description = "";
+
+  function eventHandler(aEvent)
+  {
+    if (aEvent.type == "keydown" || aEvent.type == "keyup") {
+      is(aEvent.isComposing, expectedIsComposing,
+         "runIsComposingTest: " + description + " (type=" + aEvent.type + ", key=" + aEvent.key + ")");
+    } else if (aEvent.type == "keypress") {
+      // keypress event shouldn't be fired during composition so that isComposing should be always false.
+      is(aEvent.isComposing, false,
+         "runIsComposingTest: " + description + " (type=" + aEvent.type + ")");
+    } else {
+      checkInputEvent(aEvent, expectedIsComposing, "insertCompositionText", "\u3042", [],
+                      `runIsComposingTest: ${description}`);
+    }
+  }
+
+  function onComposition(aEvent)
+  {
+    if (aEvent.type == "compositionstart") {
+      expectedIsComposing = true;
+    } else if (aEvent.type == "compositionend") {
+      expectedIsComposing = false;
+    }
+  }
+
+  textarea.addEventListener("keydown", eventHandler, true);
+  textarea.addEventListener("keypress", eventHandler, true);
+  textarea.addEventListener("keyup", eventHandler, true);
+  textarea.addEventListener("beforeinput", eventHandler, true);
+  textarea.addEventListener("input", eventHandler, true);
+  textarea.addEventListener("compositionstart", onComposition, true);
+  textarea.addEventListener("compositionend", onComposition, true);
+
+  textarea.focus();
+  textarea.value = "";
+
+  // XXX These cases shouldn't occur in actual native key events because we
+  //     don't dispatch key events while composition (bug 354358).
+  Services.prefs.setBoolPref("dom.keyboardevent.dispatch_during_composition", true);
+  description = "events before dispatching compositionstart";
+  synthesizeKey("KEY_ArrowLeft");
+
+  description = "events after dispatching compositionchange";
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 },
+      "key": { key: "a", code: "KeyA", keyCode: KeyboardEvent.DOM_VK_A },
+    });
+
+  // Although, firing keypress event during composition is a bug.
+  synthesizeKey("KEY_Insert");
+
+  description = "events for committing composition string";
+
+  synthesizeComposition({ type: "compositioncommitasis",
+                          key: { key: "KEY_Enter", code: "Enter", type: "keydown" } });
+
+  // input event will be fired by synthesizing compositionend event.
+  // Then, its isComposing should be false.
+  description = "events after dispatching compositioncommitasis";
+  synthesizeKey("KEY_Enter", {type: "keyup"});
+
+  Services.prefs.clearUserPref("dom.keyboardevent.dispatch_during_composition");
+
+  textarea.removeEventListener("keydown", eventHandler, true);
+  textarea.removeEventListener("keypress", eventHandler, true);
+  textarea.removeEventListener("keyup", eventHandler, true);
+  textarea.removeEventListener("beforeinput", eventHandler, true);
+  textarea.removeEventListener("input", eventHandler, true);
+  textarea.removeEventListener("compositionstart", onComposition, true);
+  textarea.removeEventListener("compositionend", onComposition, true);
+
+  textarea.value = "";
+}
+
+function runRedundantChangeTest()
+{
+  textarea.focus();
+
+  let result = [];
+  function clearResult()
+  {
+    result = [];
+  }
+
+  function handler(aEvent)
+  {
+    result.push(aEvent);
+  }
+
+  textarea.addEventListener("compositionupdate", handler, true);
+  textarea.addEventListener("compositionend", handler, true);
+  textarea.addEventListener("beforeinput", handler, true);
+  textarea.addEventListener("input", handler, true);
+  textarea.addEventListener("text", handler, true);
+
+  textarea.value = "";
+
+  // synthesize change event
+  clearResult();
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  is(result.length, 4,
+     "runRedundantChangeTest: 4 events should be fired after synthesizing composition change #1");
+  is(result[0].type, "compositionupdate",
+     "runRedundantChangeTest: compositionupdate should be fired after synthesizing composition change #1");
+  is(result[1].type, "text",
+     "runRedundantChangeTest: text should be fired after synthesizing composition change because it's dispatched when there is composing string #1");
+  is(result[2].type, "beforeinput",
+     "runRedundantChangeTest: beforeinput should be fired after synthesizing composition change #1");
+  checkInputEvent(result[2], true, "insertCompositionText", "\u3042", [],
+                  "runRedundantChangeTest: after synthesizing composition change #1");
+  is(result[3].type, "input",
+     "runRedundantChangeTest: input should be fired after synthesizing composition change #1");
+  checkInputEvent(result[3], true, "insertCompositionText", "\u3042", [],
+                  "runRedundantChangeTest: after synthesizing composition change #1");
+  is(textarea.value, "\u3042", "runRedundantChangeTest: textarea has uncommitted string #1");
+
+  // synthesize another change event
+  clearResult();
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042\u3044",
+        "clauses":
+        [
+          { "length": 2, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 }
+    });
+
+  is(result.length, 4,
+     "runRedundantChangeTest: 4 events should be fired after synthesizing composition change #2");
+  is(result[0].type, "compositionupdate",
+     "runRedundantChangeTest: compositionupdate should be fired after synthesizing composition change #2");
+  is(result[1].type, "text",
+     "runRedundantChangeTest: text should be fired after synthesizing composition change because it's dispatched when there is composing string #2");
+  is(result[2].type, "beforeinput",
+     "runRedundantChangeTest: beforeinput should be fired after synthesizing composition change #2");
+  checkInputEvent(result[2], true, "insertCompositionText", "\u3042\u3044", [],
+                  "runRedundantChangeTest: after synthesizing composition change #2");
+  is(result[3].type, "input",
+     "runRedundantChangeTest: input should be fired after synthesizing composition change #2");
+  checkInputEvent(result[3], true, "insertCompositionText", "\u3042\u3044", [],
+                  "runRedundantChangeTest: after synthesizing composition change #2");
+  is(textarea.value, "\u3042\u3044", "runRedundantChangeTest: textarea has uncommitted string #2");
+
+  // synthesize same change event again
+  clearResult();
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3042\u3044",
+        "clauses":
+        [
+          { "length": 2, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 }
+    });
+
+  is(result.length, 0, "runRedundantChangeTest: no events should be fired after synthesizing composition change again");
+  is(textarea.value, "\u3042\u3044", "runRedundantChangeTest: textarea has uncommitted string #3");
+
+  // synthesize commit-as-is
+  clearResult();
+  synthesizeComposition({ type: "compositioncommitasis" });
+  is(result.length, 4,
+     "runRedundantChangeTest: 4 events should be fired after synthesizing composition commit-as-is");
+  is(result[0].type, "text",
+     "runRedundantChangeTest: text should be fired after synthesizing composition commit-as-is for removing the ranges");
+  is(result[1].type, "beforeinput",
+     "runRedundantChangeTest: beforeinput should be fired after synthesizing composition commit-as-is for removing the ranges");
+  checkInputEvent(result[1], true, "insertCompositionText", "\u3042\u3044", [],
+                  "runRedundantChangeTest: at synthesizing commit-as-is");
+  is(result[2].type, "compositionend",
+     "runRedundantChangeTest: compositionend should be fired after synthesizing composition commit-as-is");
+  is(result[3].type, "input",
+     "runRedundantChangeTest: input should be fired before compositionend at synthesizing commit-as-is");
+  checkInputEvent(result[3], false, "insertCompositionText", "\u3042\u3044", [],
+                  "runRedundantChangeTest: at synthesizing commit-as-is");
+  is(textarea.value, "\u3042\u3044", "runRedundantChangeTest: textarea has the commit string");
+
+  textarea.removeEventListener("compositionupdate", handler, true);
+  textarea.removeEventListener("compositionend", handler, true);
+  textarea.removeEventListener("beforeinput", handler, true);
+  textarea.removeEventListener("input", handler, true);
+  textarea.removeEventListener("text", handler, true);
+}
+
+function runNotRedundantChangeTest()
+{
+  textarea.focus();
+
+  let result = [];
+  function clearResult()
+  {
+    result = [];
+  }
+
+  function handler(aEvent)
+  {
+    result.push(aEvent);
+  }
+
+  textarea.addEventListener("compositionupdate", handler, true);
+  textarea.addEventListener("compositionend", handler, true);
+  textarea.addEventListener("beforeinput", handler, true);
+  textarea.addEventListener("input", handler, true);
+  textarea.addEventListener("text", handler, true);
+
+  textarea.value = "abcde";
+
+  // synthesize change event with non-null ranges
+  clearResult();
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "ABCDE",
+        "clauses":
+        [
+          { "length": 5, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 5, "length": 0 }
+    });
+
+  is(result.length, 4,
+     "runNotRedundantChangeTest: 4 events should be fired after synthesizing composition change with non-null ranges");
+  is(result[0].type, "compositionupdate",
+     "runNotRedundantChangeTest: compositionupdate should be fired after synthesizing composition change with non-null ranges");
+  is(result[1].type, "text",
+     "runNotRedundantChangeTest: text should be fired after synthesizing composition change because it's dispatched when there is composing string with non-null ranges");
+  is(result[2].type, "beforeinput",
+     "runNotRedundantChangeTest: beforeinput should be fired after synthesizing composition change with non-null ranges");
+  checkInputEvent(result[2], true, "insertCompositionText", "ABCDE", [],
+                  "runNotRedundantChangeTest: after synthesizing composition change with non-null ranges");
+  is(result[3].type, "input",
+     "runNotRedundantChangeTest: input should be fired after synthesizing composition change with non-null ranges");
+  checkInputEvent(result[3], true, "insertCompositionText", "ABCDE", [],
+                  "runNotRedundantChangeTest: after synthesizing composition change with non-null ranges");
+  is(textarea.value, "abcdeABCDE", "runNotRedundantChangeTest: textarea has uncommitted string #1");
+
+  // synthesize change event with null ranges
+  clearResult();
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "ABCDE",
+        "clauses":
+        [
+          { "length": 0, "attr": 0 }
+        ]
+      },
+    });
+  is(result.length, 3,
+     "runNotRedundantChangeTest: 3 events should be fired after synthesizing composition change with null ranges after non-null ranges");
+  is(result[0].type, "text",
+     "runNotRedundantChangeTest: text should be fired after synthesizing composition change because it's dispatched when there is composing string with null ranges after non-null ranges");
+  is(result[1].type, "beforeinput",
+     "runNotRedundantChangeTest: beforeinput should be fired after synthesizing composition change because it's dispatched when there is composing string with null ranges after non-null ranges");
+  checkInputEvent(result[1], true, "insertCompositionText", "ABCDE", [],
+                  "runNotRedundantChangeTest: after synthesizing composition change with null ranges after non-null ranges");
+  is(result[2].type, "input",
+     "runNotRedundantChangeTest: input should be fired after synthesizing composition change with null ranges after non-null ranges");
+  checkInputEvent(result[2], true, "insertCompositionText", "ABCDE", [],
+                  "runNotRedundantChangeTest: after synthesizing composition change with null ranges after non-null ranges");
+  is(textarea.value, "abcdeABCDE", "runNotRedundantChangeTest: textarea has uncommitted string #2");
+
+  // synthesize change event with non-null ranges
+  clearResult();
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "ABCDE",
+        "clauses":
+        [
+          { "length": 5, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 5, "length": 0 }
+    });
+
+  is(result.length, 3,
+     "runNotRedundantChangeTest: 3 events should be fired after synthesizing composition change with null ranges after non-null ranges");
+  is(result[0].type, "text",
+     "runNotRedundantChangeTest: text should be fired after synthesizing composition change because it's dispatched when there is composing string with non-null ranges after null ranges");
+  is(result[1].type, "beforeinput",
+     "runNotRedundantChangeTest: beforeinput should be fired after synthesizing composition change because it's dispatched when there is composing string with non-null ranges after null ranges");
+  checkInputEvent(result[1], true, "insertCompositionText", "ABCDE", [],
+                  "runNotRedundantChangeTest: after synthesizing composition change with non-null ranges after null ranges");
+  is(result[2].type, "input",
+     "runNotRedundantChangeTest: input should be fired after synthesizing composition change with non-null ranges after null ranges");
+  checkInputEvent(result[2], true, "insertCompositionText", "ABCDE", [],
+                  "runNotRedundantChangeTest: after synthesizing composition change with non-null ranges after null ranges");
+  is(textarea.value, "abcdeABCDE", "runNotRedundantChangeTest: textarea has uncommitted string #3");
+
+  // synthesize change event with empty data and null ranges
+  clearResult();
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "",
+        "clauses":
+        [
+          { "length": 0, "attr": 0 }
+        ]
+      },
+    });
+  is(result.length, 4,
+     "runNotRedundantChangeTest: 4 events should be fired after synthesizing composition change with empty data and null ranges after non-null ranges");
+  is(result[0].type, "compositionupdate",
+     "runNotRedundantChangeTest: compositionupdate should be fired after synthesizing composition change with empty data and null ranges after non-null ranges");
+  is(result[1].type, "text",
+     "runNotRedundantChangeTest: text should be fired after synthesizing composition change because it's dispatched when there is composing string with empty data and null ranges after non-null ranges");
+  is(result[2].type, "beforeinput",
+     "runNotRedundantChangeTest: beforeinput should be fired after synthesizing composition change with empty data and null ranges after non-null ranges");
+  checkInputEvent(result[2], true, "insertCompositionText", "", [],
+                  "runNotRedundantChangeTest: after synthesizing composition change with empty data and null ranges after non-null ranges");
+  is(result[3].type, "input",
+     "runNotRedundantChangeTest: input should be fired after synthesizing composition change with empty data and null ranges after non-null ranges");
+  checkInputEvent(result[3], true, "insertCompositionText", "", [],
+                  "runNotRedundantChangeTest: after synthesizing composition change with empty data and null ranges after non-null ranges");
+  is(textarea.value, "abcde", "runNotRedundantChangeTest: textarea doesn't have uncommitted string #1");
+
+  // synthesize change event with non-null ranges
+  clearResult();
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "ABCDE",
+        "clauses":
+        [
+          { "length": 5, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 5, "length": 0 }
+    });
+
+  is(result.length, 4,
+     "runNotRedundantChangeTest: 4 events should be fired after synthesizing composition change with non-null ranges after empty data and null ranges");
+  is(result[0].type, "compositionupdate",
+     "runNotRedundantChangeTest: compositionupdate should be fired after synthesizing composition change with non-null ranges after empty data and null ranges");
+  is(result[1].type, "text",
+     "runNotRedundantChangeTest: text should be fired after synthesizing composition change because it's dispatched when there is composing string with non-null ranges after empty data and null ranges");
+  is(result[2].type, "beforeinput",
+     "runNotRedundantChangeTest: beforeinput should be fired after synthesizing composition change with non-null ranges after empty data and null ranges");
+  checkInputEvent(result[2], true, "insertCompositionText", "ABCDE", [],
+                  "runNotRedundantChangeTest: after synthesizing composition change with non-null ranges after empty data and null ranges");
+  is(result[3].type, "input",
+     "runNotRedundantChangeTest: input should be fired after synthesizing composition change with non-null ranges after empty data and null ranges");
+  checkInputEvent(result[3], true, "insertCompositionText", "ABCDE", [],
+                  "runNotRedundantChangeTest: after synthesizing composition change with non-null ranges after empty data and null ranges");
+  is(textarea.value, "abcdeABCDE", "runNotRedundantChangeTest: textarea has uncommitted string #4");
+
+  clearResult();
+  synthesizeComposition({ type: "compositioncommit", data: "" });
+
+  is(result.length, 5,
+     "runNotRedundantChangeTest: 5 events should be fired after synthesizing composition commit with empty data after non-empty data");
+  is(result[0].type, "compositionupdate",
+     "runNotRedundantChangeTest: compositionupdate should be fired after synthesizing composition commit with empty data after non-empty data");
+  is(result[1].type, "text",
+     "runNotRedundantChangeTest: text should be fired after synthesizing composition change because it's dispatched when there is composing string with empty data after non-empty data");
+  is(result[2].type, "beforeinput",
+     "runNotRedundantChangeTest: beforeinput should be fired after synthesizing composition commit with empty data after non-empty data");
+  checkInputEvent(result[2], true, "insertCompositionText", "", [],
+                  "runNotRedundantChangeTest: after synthesizing composition change with empty data after non-empty data");
+  is(result[3].type, "compositionend",
+     "runNotRedundantChangeTest: compositionend should be fired after synthesizing composition commit with empty data after non-empty data");
+  is(result[4].type, "input",
+     "runNotRedundantChangeTest: input should be fired after compositionend after synthesizing composition change with empty data after non-empty data");
+  checkInputEvent(result[4], false, "insertCompositionText", "", [],
+                  "runNotRedundantChangeTest: after synthesizing composition change with empty data after non-empty data");
+  is(textarea.value, "abcde", "runNotRedundantChangeTest: textarea doesn't have uncommitted string #2");
+
+  textarea.removeEventListener("compositionupdate", handler, true);
+  textarea.removeEventListener("compositionend", handler, true);
+  textarea.removeEventListener("beforeinput", handler, true);
+  textarea.removeEventListener("input", handler, true);
+  textarea.removeEventListener("text", handler, true);
+}
+
+function runNativeLineBreakerTest()
+{
+  textarea.focus();
+
+  let result = {};
+  function clearResult()
+  {
+    result = { compositionupdate: null, compositionend: null };
+  }
+
+  function handler(aEvent)
+  {
+    result[aEvent.type] = aEvent.data;
+  }
+
+  Services.prefs.setBoolPref("dom.compositionevent.allow_control_characters", false);
+
+  textarea.addEventListener("compositionupdate", handler, true);
+  textarea.addEventListener("compositionend", handler, true);
+
+  // '\n' in composition string shouldn't be changed.
+  clearResult();
+  textarea.value = "";
+  let clauses = [ "abc\n", "def\n\ng", "hi\n", "\njkl" ];
+  let caret = clauses[0] + clauses[1] + clauses[2];
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": clauses.join(''),
+        "clauses":
+        [
+          { "length": clauses[0].length,
+            "attr": COMPOSITION_ATTR_RAW_CLAUSE },
+          { "length": clauses[1].length,
+            "attr": COMPOSITION_ATTR_SELECTED_RAW_CLAUSE },
+          { "length": clauses[2].length,
+            "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE },
+          { "length": clauses[3].length,
+            "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+        ]
+      },
+      "caret": { "start": caret.length, "length": 0 }
+    });
+
+  checkSelection(caret.replace(/\n/g, "\n").length + (kLFLen - 1) * 4, "", "runNativeLineBreakerTest", "#1");
+  checkIMESelection("RawClause", true, 0, clauses[0].replace(/\n/g, kLF), "runNativeLineBreakerTest: \\n shouldn't be replaced with any character #1");
+  checkIMESelection("SelectedRawClause", true, clauses[0].replace(/\n/g, kLF).length, clauses[1].replace(/\n/g, kLF), "runNativeLineBreakerTest: \\n shouldn't be replaced with any character #1");
+  checkIMESelection("ConvertedClause", true, (clauses[0] + clauses[1]).replace(/\n/g, kLF).length, clauses[2].replace(/\n/g, kLF), "runNativeLineBreakerTest: \\n shouldn't be replaced with any character #1");
+  checkIMESelection("SelectedClause", true, (clauses[0] + clauses[1] + clauses[2]).replace(/\n/g, kLF).length, clauses[3].replace(/\n/g, kLF), "runNativeLineBreakerTest: \\n shouldn't be replaced with any character #1");
+  is(result.compositionupdate, clauses.join('').replace(/\n/g, "\n"), "runNativeLineBreakerTest: \\n in compositionupdate.data shouldn't be removed nor replaced with other characters #1");
+  is(textarea.value, clauses.join('').replace(/\n/g, "\n"), "runNativeLineBreakerTest: \\n in textarea.value shouldn't be removed nor replaced with other characters #1");
+
+  synthesizeComposition({ type: "compositioncommit", data: clauses.join('') });
+  checkSelection(clauses.join('').replace(/\n/g, "\n").length + (kLFLen - 1) * 5, "", "runNativeLineBreakerTest", "#2");
+  is(result.compositionend, clauses.join('').replace(/\n/g, "\n"), "runNativeLineBreakerTest: \\n in compositionend.data shouldn't be removed nor replaced with other characters #2");
+  is(textarea.value, clauses.join('').replace(/\n/g, "\n"), "runNativeLineBreakerTest: \\n in textarea.value shouldn't be removed nor replaced with other characters #2");
+
+  // \r\n in composition string should be replaced with \n.
+  clearResult();
+  textarea.value = "";
+  clauses = [ "abc\r\n", "def\r\n\r\ng", "hi\r\n", "\r\njkl" ];
+  caret = clauses[0] + clauses[1] + clauses[2];
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": clauses.join(''),
+        "clauses":
+        [
+          { "length": clauses[0].length,
+            "attr": COMPOSITION_ATTR_RAW_CLAUSE },
+          { "length": clauses[1].length,
+            "attr": COMPOSITION_ATTR_SELECTED_RAW_CLAUSE },
+          { "length": clauses[2].length,
+            "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE },
+          { "length": clauses[3].length,
+            "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+        ]
+      },
+      "caret": { "start": caret.length, "length": 0 }
+    });
+
+  checkSelection(caret.replace(/\r\n/g, "\n").length + (kLFLen - 1) * 4, "", "runNativeLineBreakerTest", "#3");
+  checkIMESelection("RawClause", true, 0, clauses[0].replace(/\r\n/g, kLF), "runNativeLineBreakerTest: \\r\\n should be replaced with \\n #3");
+  checkIMESelection("SelectedRawClause", true, clauses[0].replace(/\r\n/g, kLF).length, clauses[1].replace(/\r\n/g, kLF), "runNativeLineBreakerTest: \\r\\n should be replaced with \\n #3");
+  checkIMESelection("ConvertedClause", true, (clauses[0] + clauses[1]).replace(/\r\n/g, kLF).length, clauses[2].replace(/\r\n/g, kLF), "runNativeLineBreakerTest: \\r\\n should be replaced with \\n #3");
+  checkIMESelection("SelectedClause", true, (clauses[0] + clauses[1] + clauses[2]).replace(/\r\n/g, kLF).length, clauses[3].replace(/\r\n/g, kLF), "runNativeLineBreakerTest: \\r\\n should be replaced with \\n #3");
+  is(result.compositionupdate, clauses.join('').replace(/\r\n/g, "\n"), "runNativeLineBreakerTest: \\r\\n in compositionudpate.data should be replaced with \\n #3");
+  is(textarea.value, clauses.join('').replace(/\r\n/g, "\n"), "runNativeLineBreakerTest: \\r\\n in textarea.value should be replaced with \\n #3");
+
+  synthesizeComposition({ type: "compositioncommit", data: clauses.join('') });
+  checkSelection(clauses.join('').replace(/\r\n/g, "\n").length + (kLFLen - 1) * 5, "", "runNativeLineBreakerTest", "#4");
+  is(result.compositionend, clauses.join('').replace(/\r\n/g, "\n"), "runNativeLineBreakerTest: \\r\\n in compositionend.data should be replaced with \\n #4");
+  is(textarea.value, clauses.join('').replace(/\r\n/g, "\n"), "runNativeLineBreakerTest: \\r\\n in textarea.value should be replaced with \\n #4");
+
+  // \r (not followed by \n) in composition string should be replaced with \n.
+  clearResult();
+  textarea.value = "";
+  clauses = [ "abc\r", "def\r\rg", "hi\r", "\rjkl" ];
+  caret = clauses[0] + clauses[1] + clauses[2];
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": clauses.join(''),
+        "clauses":
+        [
+          { "length": clauses[0].length,
+            "attr": COMPOSITION_ATTR_RAW_CLAUSE },
+          { "length": clauses[1].length,
+            "attr": COMPOSITION_ATTR_SELECTED_RAW_CLAUSE },
+          { "length": clauses[2].length,
+            "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE },
+          { "length": clauses[3].length,
+            "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+        ]
+      },
+      "caret": { "start": caret.length, "length": 0 }
+    });
+
+  checkSelection(caret.replace(/\r/g, "\n").length + (kLFLen - 1) * 4, "", "runNativeLineBreakerTest", "#5");
+  checkIMESelection("RawClause", true, 0, clauses[0].replace(/\r/g, kLF), "runNativeLineBreakerTest: \\r should be replaced with \\n #5");
+  checkIMESelection("SelectedRawClause", true, clauses[0].replace(/\r/g, kLF).length, clauses[1].replace(/\r/g, kLF), "runNativeLineBreakerTest: \\r should be replaced with \\n #5");
+  checkIMESelection("ConvertedClause", true, (clauses[0] + clauses[1]).replace(/\r/g, kLF).length, clauses[2].replace(/\r/g, kLF), "runNativeLineBreakerTest: \\r should be replaced with \\n #5");
+  checkIMESelection("SelectedClause", true, (clauses[0] + clauses[1] + clauses[2]).replace(/\r/g, kLF).length, clauses[3].replace(/\r/g, kLF), "runNativeLineBreakerTest: \\r should be replaced with \\n #5");
+  is(result.compositionupdate, clauses.join('').replace(/\r/g, "\n"), "runNativeLineBreakerTest: \\r in compositionupdate.data should be replaced with \\n #5");
+  is(textarea.value, clauses.join('').replace(/\r/g, "\n"), "runNativeLineBreakerTest: \\r in textarea.value should be replaced with \\n #5");
+
+  synthesizeComposition({ type: "compositioncommit", data: clauses.join('') });
+  checkSelection(clauses.join('').replace(/\r/g, "\n").length + (kLFLen - 1) * 5, "", "runNativeLineBreakerTest", "#6");
+  is(result.compositionend, clauses.join('').replace(/\r/g, "\n"), "runNativeLineBreakerTest: \\r in compositionend.data should be replaced with \\n #6");
+  is(textarea.value, clauses.join('').replace(/\r/g, "\n"), "runNativeLineBreakerTest: \\r in textarea.value should be replaced with \\n #6");
+
+  textarea.removeEventListener("compositionupdate", handler, true);
+  textarea.removeEventListener("compositionend", handler, true);
+
+  Services.prefs.clearUserPref("dom.compositionevent.allow_control_characters");
+}
+
+function runControlCharTest()
+{
+  textarea.focus();
+
+  let result = {};
+  function clearResult()
+  {
+    result = { compositionupdate: null, compositionend: null };
+  }
+
+  function handler(aEvent)
+  {
+    result[aEvent.type] = aEvent.data;
+  }
+
+  textarea.addEventListener("compositionupdate", handler, true);
+  textarea.addEventListener("compositionend", handler, true);
+
+  textarea.value = "";
+
+  let controlChars = String.fromCharCode.apply(null, Object.keys(Array.from({length:0x20}))) + "\x7F";
+  let allowedChars = "\t\n\n";
+
+  let data = "AB" + controlChars + "CD" + controlChars + "EF";
+  let removedData = "AB" + allowedChars + "CD" + allowedChars + "EF";
+
+  let DIndex = data.indexOf("D");
+  let removedDIndex = removedData.indexOf("D");
+
+  // input string contains control characters
+  clearResult();
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": data,
+        "clauses":
+        [
+          { "length": DIndex,
+            "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+          { "length": data.length - DIndex,
+            "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": DIndex, "length": 0 }
+    });
+
+  checkSelection(removedDIndex + (kLFLen - 1) * 2, "", "runControlCharTest", "#1")
+
+  is(result.compositionupdate, removedData, "runControlCharTest: control characters in event.data should be removed in compositionupdate event #1");
+  is(textarea.value, removedData, "runControlCharTest: control characters should not appear in textarea #1");
+
+  synthesizeComposition({ type: "compositioncommit", data });
+
+  is(result.compositionend, removedData, "runControlCharTest: control characters in event.data should be removed in compositionend event #2");
+  is(textarea.value, removedData, "runControlCharTest: control characters should not appear in textarea #2");
+
+  textarea.value = "";
+
+  clearResult();
+
+  Services.prefs.setBoolPref("dom.compositionevent.allow_control_characters", true);
+
+  // input string contains control characters, allowing control characters
+  clearResult();
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": data,
+        "clauses":
+        [
+          { "length": DIndex,
+            "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+          { "length": data.length - DIndex,
+            "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": DIndex, "length": 0 }
+    });
+
+  checkSelection(DIndex + (kLFLen - 1) * 2, "", "runControlCharTest", "#3")
+
+  is(result.compositionupdate, data.replace(/\r/g, "\n"), "runControlCharTest: control characters in event.data should not be removed in compositionupdate event #3");
+  is(textarea.value, data.replace(/\r/g, "\n"), "runControlCharTest: control characters should appear in textarea #3");
+
+  synthesizeComposition({ type: "compositioncommit", data });
+
+  is(result.compositionend, data.replace(/\r/g, "\n"), "runControlCharTest: control characters in event.data should not be removed in compositionend event #4");
+  is(textarea.value, data.replace(/\r/g, "\n"), "runControlCharTest: control characters should appear in textarea #4");
+
+  Services.prefs.clearUserPref("dom.compositionevent.allow_control_characters");
+
+  textarea.removeEventListener("compositionupdate", handler, true);
+  textarea.removeEventListener("compositionend", handler, true);
+}
+
+async function runRemoveContentTest()
+{
+  let events = [];
+  function eventHandler(aEvent)
+  {
+    events.push(aEvent);
+  }
+  textarea.addEventListener("compositionstart", eventHandler, true);
+  textarea.addEventListener("compositionupdate", eventHandler, true);
+  textarea.addEventListener("compositionend", eventHandler, true);
+  textarea.addEventListener("beforeinput", eventHandler, true);
+  textarea.addEventListener("input", eventHandler, true);
+  textarea.addEventListener("text", eventHandler, true);
+
+  textarea.focus();
+  textarea.value = "";
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u306E",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  let nextSibling = textarea.nextSibling;
+  let parent = textarea.parentElement;
+
+  events = [];
+  parent.removeChild(textarea);
+
+  await waitForEventLoops(50);
+
+  // XXX Currently, "input" event and "beforeinput" event are not fired on removed content.
+  is(events.length, 3,
+     "runRemoveContentTest: wrong event count #1");
+  is(events[0].type, "compositionupdate",
+     "runRemoveContentTest: the 1st event must be compositionupdate #1");
+  is(events[0].target, textarea,
+     `runRemoveContentTest: The "${events[0].type}" event was fired on wrong event target #1`);
+  is(events[0].data, "",
+     "runRemoveContentTest: compositionupdate has wrong data #1");
+  is(events[1].type, "text",
+     "runRemoveContentTest: the 2nd event must be text #1");
+  is(events[1].target, textarea,
+     `runRemoveContentTest: The "${events[1].type}" event was fired on wrong event target #1`);
+  todo_is(events[2].type, "beforeinput",
+     "runRemoveContentTest: the 3rd event must be beforeinput #1");
+  // is(events[2].target, textarea,
+  //    `runRemoveContentTest: The "${events[2].type}" event was fired on wrong event target #1`);
+  // checkInputEvent(events[2], true, "insertCompositionText", "", [],
+  //                 "runRemoveContentTest: #1");
+  is(events[2].type, "compositionend",
+     "runRemoveContentTest: the 4th event must be compositionend #1");
+  is(events[2].target, textarea,
+     `runRemoveContentTest: The "${events[2].type}" event was fired on wrong event target #1`);
+  is(events[2].data, "",
+     "runRemoveContentTest: compositionend has wrong data #1");
+  ok(!getEditor(textarea).isComposing,
+     "runRemoveContentTest: the textarea still has composition #1");
+  todo_is(textarea.value, "",
+     "runRemoveContentTest: the textarea has the committed text? #1");
+
+  parent.insertBefore(textarea, nextSibling);
+
+  textarea.focus();
+  textarea.value = "";
+
+  synthesizeComposition({ type: "compositionstart" });
+
+  events = [];
+  parent.removeChild(textarea);
+
+  await waitForEventLoops(50);
+
+  // XXX Currently, "input" event and "beforeinput" event are not fired on removed content.
+  is(events.length, 2,
+     "runRemoveContentTest: wrong event count #2");
+  is(events[0].type, "text",
+     "runRemoveContentTest: the 1st event must be text #2");
+  is(events[0].target, textarea,
+     `runRemoveContentTest: The ${events[0].type} event was fired on wrong event target #2`);
+  todo_is(events[1].type, "beforeinput",
+     "runRemoveContentTest: the 2nd event must be beforeinput #2");
+  // is(events[1].target, textarea,
+  //    `runRemoveContentTest: The ${events[1].type} event was fired on wrong event target #2`);
+  // checkInputEvent(events[1], true, "insertCompositionText", "", [],
+  //                 "runRemoveContentTest: #2");
+  is(events[1].type, "compositionend",
+     "runRemoveContentTest: the 3rd event must be compositionend #2");
+  is(events[1].target, textarea,
+     `runRemoveContentTest: The ${events[1].type} event was fired on wrong event target #2`);
+  is(events[1].data, "",
+     "runRemoveContentTest: compositionupdate has wrong data #2");
+  ok(!getEditor(textarea).isComposing,
+     "runRemoveContentTest: the textarea still has composition #2");
+  is(textarea.value, "",
+     "runRemoveContentTest: the textarea has the committed text? #2");
+
+  parent.insertBefore(textarea, nextSibling);
+
+  textarea.removeEventListener("compositionstart", eventHandler, true);
+  textarea.removeEventListener("compositionupdate", eventHandler, true);
+  textarea.removeEventListener("compositionend", eventHandler, true);
+  textarea.removeEventListener("beforeinput", eventHandler, true);
+  textarea.removeEventListener("input", eventHandler, true);
+  textarea.removeEventListener("text", eventHandler, true);
+
+  await waitForTick();
+}
+
+function runTestOnAnotherContext(aPanelOrFrame, aFocusedEditor, aTestName)
+{
+  aFocusedEditor.value = "";
+
+  // The frames and panel are cross-origin, and we no longer
+  // propagate flushes to parent cross-origin iframes explicitly,
+  // so flush our own layout here so the positions are correct.
+  document.documentElement.getBoundingClientRect();
+
+  let editorRect = synthesizeQueryEditorRect();
+  if (!checkQueryContentResult(editorRect, aTestName + ": editorRect")) {
+    return;
+  }
+
+  let r = aPanelOrFrame.getBoundingClientRect();
+  let parentRect = {
+    left: r.left * window.devicePixelRatio,
+    top: r.top * window.devicePixelRatio,
+    width: (r.right - r.left) * window.devicePixelRatio,
+    height: (r.bottom - r.top) * window.devicePixelRatio,
+  };
+  checkRectContainsRect(editorRect, parentRect, aTestName +
+                        ": the editor rect coordinates are wrong");
+
+  // input characters
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3078\u3093\u3057\u3093",
+        "clauses":
+        [
+          { "length": 4, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 4, "length": 0 }
+    });
+
+  if (!checkContent("\u3078\u3093\u3057\u3093", aTestName, "#1-1") ||
+      !checkSelection(4, "", aTestName, "#1-1")) {
+    return;
+  }
+
+  // convert them #1
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u8FD4\u4FE1",
+        "clauses":
+        [
+          { "length": 2,
+            "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 }
+    });
+
+  if (!checkContent("\u8FD4\u4FE1", aTestName, "#1-2") ||
+      !checkSelection(2, "", aTestName, "#1-2")) {
+    return;
+  }
+
+  // convert them #2
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u5909\u8EAB",
+        "clauses":
+        [
+          { "length": 2,
+            "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 }
+    });
+
+  if (!checkContent("\u5909\u8EAB", aTestName, "#1-3") ||
+      !checkSelection(2, "", aTestName, "#1-3")) {
+    return;
+  }
+
+  // commit them
+  synthesizeComposition({ type: "compositioncommitasis" });
+  if (!checkContent("\u5909\u8EAB", aTestName, "#1-4") ||
+      !checkSelection(2, "", aTestName, "#1-4")) {
+    return;
+  }
+
+  is(aFocusedEditor.value, "\u5909\u8EAB",
+     aTestName + ": composition isn't in the focused editor");
+  if (aFocusedEditor.value != "\u5909\u8EAB") {
+    return;
+  }
+
+  let textRect = synthesizeQueryTextRect(0, 1);
+  let caretRect = synthesizeQueryCaretRect(2);
+  if (!checkQueryContentResult(textRect,
+                               aTestName + ": synthesizeQueryTextRect") ||
+      !checkQueryContentResult(caretRect,
+                               aTestName + ": synthesizeQueryCaretRect")) {
+    return;
+  }
+  checkRectContainsRect(textRect, editorRect, aTestName + ":testRect");
+  checkRectContainsRect(caretRect, editorRect, aTestName + ":caretRect");
+}
+
+function runFrameTest()
+{
+  textareaInFrame.focus();
+  runTestOnAnotherContext(iframe, textareaInFrame, "runFrameTest");
+  runCharAtPointTest(textareaInFrame, "textarea in the iframe");
+}
+
+async function runPanelTest()
+{
+  panel.hidden = false;
+  let waitOpenPopup = new Promise(resolve => {
+    panel.addEventListener("popupshown", resolve, {once: true});
+  });
+  let waitFocusTextBox = new Promise(resolve => {
+    textbox.addEventListener("focus", resolve, {once: true});
+  });
+  panel.openPopupAtScreen(window.screenX + window.outerWidth, 0, false);
+  await waitOpenPopup;
+  textbox.focus();
+  await waitFocusTextBox;
+  is(panel.state, "open", "The panel should be open (after textbox.focus())");
+  await waitForTick();
+  is(panel.state, "open", "The panel should be open (after waitForTick())");
+  runTestOnAnotherContext(panel, textbox, "runPanelTest");
+  is(panel.state, "open", "The panel should be open (after runTestOnAnotherContext())");
+  runCharAtPointTest(textbox, "textbox in the panel");
+  is(panel.state, "open", "The panel should be open (after runCharAtPointTest())");
+  let waitClosePopup = new Promise(resolve => {
+    panel.addEventListener("popuphidden", resolve, {once: true});
+  });
+  panel.hidePopup();
+  await waitClosePopup;
+  await waitForTick();
+}
+
+// eslint-disable-next-line complexity
+function runMaxLengthTest()
+{
+  input.maxLength = 1;
+  input.value = "";
+  input.focus();
+
+  let kDesc ="runMaxLengthTest";
+
+  // input first character
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  if (!checkContent("\u3089", kDesc, "#1-1") ||
+      !checkSelection(1, "", kDesc, "#1-1")) {
+    return;
+  }
+
+  // input second character
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC",
+        "clauses":
+        [
+          { "length": 2, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 }
+    });
+
+  if (!checkContent("\u3089\u30FC", kDesc, "#1-2") ||
+      !checkSelection(2, "", kDesc, "#1-2")) {
+    return;
+  }
+
+  // input third character
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081",
+        "clauses":
+        [
+          { "length": 3, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 3, "length": 0 }
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081", kDesc, "#1-3") ||
+      !checkSelection(3, "", kDesc, "#1-3")) {
+    return;
+  }
+
+  // input fourth character
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081\u3093",
+        "clauses":
+        [
+          { "length": 4, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 4, "length": 0 }
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081\u3093", kDesc, "#1-4") ||
+      !checkSelection(4, "", kDesc, "#1-4")) {
+    return;
+  }
+
+
+  // backspace
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081",
+        "clauses":
+        [
+          { "length": 3, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 3, "length": 0 }
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081", kDesc, "#1-5") ||
+      !checkSelection(3, "", kDesc, "#1-5")) {
+    return;
+  }
+
+  // re-input
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081\u3093",
+        "clauses":
+        [
+          { "length": 4, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 4, "length": 0 }
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081\u3093", kDesc, "#1-6") ||
+      !checkSelection(4, "", kDesc, "#1-6")) {
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081\u3093\u3055",
+        "clauses":
+        [
+          { "length": 5, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 5, "length": 0 }
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081\u3093\u3055", kDesc, "#1-7") ||
+      !checkSelection(5, "", kDesc, "#1-7")) {
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081\u3093\u3055\u3044",
+        "clauses":
+        [
+          { "length": 6, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 6, "length": 0 }
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081\u3093\u3055\u3044", kDesc, "#1-8") ||
+      !checkSelection(6, "", kDesc, "#1-8")) {
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081\u3093\u3055\u3044\u3053",
+        "clauses":
+        [
+          { "length": 7, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 7, "length": 0 }
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081\u3093\u3055\u3044\u3053",
+                    kDesc, "#1-8") ||
+      !checkSelection(7, "", kDesc, "#1-8")) {
+    return;
+  }
+
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3089\u30FC\u3081\u3093\u3055\u3044\u3053\u3046",
+        "clauses":
+        [
+          { "length": 8, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 8, "length": 0 }
+    });
+
+  if (!checkContent("\u3089\u30FC\u3081\u3093\u3055\u3044\u3053\u3046",
+                    kDesc, "#1-9") ||
+      !checkSelection(8, "", kDesc, "#1-9")) {
+    return;
+  }
+
+  // convert
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u30E9\u30FC\u30E1\u30F3\u6700\u9AD8",
+        "clauses":
+        [
+          { "length": 4,
+            "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+          { "length": 2,
+            "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE }
+        ]
+      },
+      "caret": { "start": 4, "length": 0 }
+    });
+
+  if (!checkContent("\u30E9\u30FC\u30E1\u30F3\u6700\u9AD8", kDesc, "#1-10") ||
+      !checkSelection(4, "", kDesc, "#1-10")) {
+    return;
+  }
+
+  // commit the composition string
+  synthesizeComposition({ type: "compositioncommitasis" });
+  if (!checkContent("\u30E9", kDesc, "#1-11") ||
+      !checkSelection(1, "", kDesc, "#1-11")) {
+    return;
+  }
+
+  // input characters
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u3057",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  if (!checkContent("\u30E9\u3057", kDesc, "#2-1") ||
+      !checkSelection(1 + 1, "", kDesc, "#2-1")) {
+    return;
+  }
+
+  // commit the composition string
+  synthesizeComposition({ type: "compositioncommit", data: "\u3058" });
+  if (!checkContent("\u30E9", kDesc, "#2-2") ||
+      !checkSelection(1 + 0, "", kDesc, "#2-2")) {
+    return;
+  }
+
+  // Undo
+  synthesizeKey("Z", {accelKey: true});
+
+  // XXX this is unexpected behavior, see bug 258291
+  if (!checkContent("\u30E9", kDesc, "#3-1") ||
+      !checkSelection(1 + 0, "", kDesc, "#3-1")) {
+    return;
+  }
+
+  // Undo
+  synthesizeKey("Z", {accelKey: true});
+  if (!checkContent("", kDesc, "#3-2") ||
+      !checkSelection(0, "", kDesc, "#3-2")) {
+    return;
+  }
+
+  // Redo
+  synthesizeKey("Z", {accelKey: true, shiftKey: true});
+  if (!checkContent("\u30E9", kDesc, "#3-3") ||
+      !checkSelection(1, "", kDesc, "#3-3")) {
+    return;
+  }
+
+  // Redo
+  synthesizeKey("Z", {accelKey: true, shiftKey: true});
+  if (!checkContent("\u30E9", kDesc, "#3-4") ||
+      !checkSelection(1 + 0, "", kDesc, "#3-4")) {
+    return;
+  }
+
+  // The input element whose content length is already maxlength and
+  // the carest is at start of the content.
+  input.value = "X";
+  input.selectionStart = input.selectionEnd = 0;
+
+  // input characters
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u9B54",
+        "clauses":
+        [
+          { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 1, "length": 0 }
+    });
+
+  if (!checkContent("\u9B54X", kDesc, "#4-1") ||
+      !checkSelection(1, "", kDesc, "#4-1")) {
+    return;
+  }
+
+  // commit the composition string
+  synthesizeComposition({ type: "compositioncommitasis" });
+
+  // The input text must be discarded. Then, the caret position shouldn't be
+  // updated from its position at compositionstart.
+  if (!checkContent("X", kDesc, "#4-2") ||
+      !checkSelection(0, "", kDesc, "#4-2")) {
+    return;
+  }
+
+  // input characters
+  synthesizeCompositionChange(
+    { "composition":
+      { "string": "\u9B54\u6CD5",
+        "clauses":
+        [
+          { "length": 2, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+        ]
+      },
+      "caret": { "start": 2, "length": 0 }
+    });
+
+  if (!checkContent("\u9B54\u6CD5X", kDesc, "#5-1") ||
+      !checkSelection(2, "", kDesc, "#5-1")) {
+    return;
+  }
+
+  // commit the composition string
+  synthesizeComposition({ type: "compositioncommitasis" });
+
+  if (checkContent("X", kDesc, "#5-2")) {
+     checkSelection(0, "", kDesc, "#5-2");
+  }
+}
+
+async function runEditorReframeTests()
+{
+  async function runEditorReframeTest(aEditor, aWindow, aEventType)
+  {
+    function getValue()
+    {
+      return aEditor == contenteditable ?
+        aEditor.innerHTML.replace("<br>", "") : aEditor.value;
+    }
+
+    let description = "runEditorReframeTest(" + aEditor.id + ", \"" + aEventType + "\"): ";
+
+    let tests = [
+      { test () {
+          synthesizeCompositionChange(
+            { "composition":
+              { "string": "a",
+                "clauses":
+                [
+                  { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+                ]
+              },
+              "caret": { "start": 1, "length": 0 }
+            });
+        },
+        check () {
+          is(getValue(aEditor), "a", description + "Typing 'a'");
+        },
+      },
+      { test () {
+          synthesizeCompositionChange(
+            { "composition":
+              { "string": "ab",
+                "clauses":
+                [
+                  { "length": 2, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+                ]
+              },
+              "caret": { "start": 2, "length": 0 }
+            });
+        },
+        check () {
+          is(getValue(aEditor), "ab", description + "Typing 'b' next to 'a'");
+        },
+      },
+      { test () {
+          synthesizeCompositionChange(
+            { "composition":
+              { "string": "abc",
+                "clauses":
+                [
+                  { "length": 3, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+                ]
+              },
+              "caret": { "start": 3, "length": 0 }
+            });
+        },
+        check () {
+          is(getValue(aEditor), "abc", description + "Typing 'c' next to 'ab'");
+        },
+      },
+      { test () {
+        synthesizeCompositionChange(
+          { "composition":
+            { "string": "abc",
+              "clauses":
+              [
+                { "length": 2, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+                { "length": 1, "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE }
+              ]
+            },
+            "caret": { "start": 2, "length": 0 }
+          });
+        },
+        check () {
+          is(getValue(aEditor), "abc", description + "Starting to convert 'ab][c'");
+        },
+      },
+      { test () {
+          synthesizeCompositionChange(
+            { "composition":
+              { "string": "ABc",
+                "clauses":
+                [
+                  { "length": 2, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE },
+                  { "length": 1, "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE }
+                ]
+              },
+              "caret": { "start": 2, "length": 0 }
+            });
+        },
+        check () {
+          is(getValue(aEditor), "ABc", description + "Starting to convert 'AB][c'");
+        },
+      },
+      { test () {
+          synthesizeCompositionChange(
+            { "composition":
+              { "string": "ABC",
+                "clauses":
+                [
+                  { "length": 2, "attr": COMPOSITION_ATTR_CONVERTED_CLAUSE },
+                  { "length": 1, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+                ]
+              },
+              "caret": { "start": 3, "length": 0 }
+            });
+          },
+        check () {
+          is(getValue(aEditor), "ABC", description + "Starting to convert 'AB][C'");
+        },
+      },
+      { test () {
+          // Commit composition
+          synthesizeComposition({ type: "compositioncommitasis" });
+        },
+        check () {
+          is(getValue(aEditor), "ABC", description + "Committed as 'ABC'");
+        },
+      },
+      { test () {
+          synthesizeCompositionChange(
+            { "composition":
+              { "string": "d",
+                "clauses":
+                [
+                  { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+                ]
+              },
+              "caret": { "start": 1, "length": 0 }
+            });
+        },
+        check () {
+          is(getValue(aEditor), "ABCd", description + "Typing 'd' next to ABC");
+        },
+      },
+      { test () {
+          synthesizeCompositionChange(
+            { "composition":
+              { "string": "de",
+                "clauses":
+                [
+                  { "length": 2, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+                ]
+              },
+              "caret": { "start": 2, "length": 0 }
+            });
+        },
+        check () {
+          is(getValue(aEditor), "ABCde", description + "Typing 'e' next to ABCd");
+        },
+      },
+      { test () {
+          synthesizeCompositionChange(
+            { "composition":
+              { "string": "def",
+                "clauses":
+                [
+                  { "length": 3, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+                ]
+              },
+              "caret": { "start": 3, "length": 0 }
+            });
+        },
+        check () {
+          is(getValue(aEditor), "ABCdef", description + "Typing 'f' next to ABCde");
+        },
+      },
+      { test () {
+          // Commit composition
+          synthesizeComposition({ type: "compositioncommitasis" });
+        },
+        check () {
+          is(getValue(aEditor), "ABCdef", description + "Commit 'def' without convert");
+        },
+      },
+      { test () {
+          // Select "Cd"
+          synthesizeKey("KEY_ArrowLeft");
+          synthesizeKey("KEY_ArrowLeft");
+          synthesizeKey("KEY_Shift", {type: "keydown", shiftKey: true});
+          synthesizeKey("KEY_ArrowLeft", {shiftKey: true});
+          synthesizeKey("KEY_ArrowLeft", {shiftKey: true});
+          synthesizeKey("KEY_Shift", {type: "keyup"});
+        },
+        check () {
+        },
+      },
+      { test () {
+          synthesizeCompositionChange(
+            { "composition":
+              { "string": "g",
+                "clauses":
+                [
+                  { "length": 1, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+                ]
+              },
+              "caret": { "start": 1, "length": 0 }
+            });
+        },
+        check () {
+          is(getValue(aEditor), "ABgef", description + "Typing 'g' next to AB");
+        },
+      },
+      { test () {
+          synthesizeCompositionChange(
+            { "composition":
+              { "string": "gh",
+                "clauses":
+                [
+                  { "length": 2, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+                ]
+              },
+              "caret": { "start": 2, "length": 0 }
+            });
+        },
+        check () {
+          is(getValue(aEditor), "ABghef", description + "Typing 'h' next to ABg");
+        },
+      },
+      { test () {
+          synthesizeCompositionChange(
+            { "composition":
+              { "string": "ghi",
+                "clauses":
+                [
+                  { "length": 3, "attr": COMPOSITION_ATTR_RAW_CLAUSE }
+                ]
+              },
+              "caret": { "start": 3, "length": 0 }
+            });
+        },
+        check () {
+          is(getValue(aEditor), "ABghief", description + "Typing 'i' next to ABgh");
+        },
+      },
+      { test () {
+          synthesizeCompositionChange(
+            { "composition":
+              { "string": "GHI",
+                "clauses":
+                [
+                  { "length": 3, "attr": COMPOSITION_ATTR_SELECTED_CLAUSE }
+                ]
+              },
+              "caret": { "start": 3, "length": 0 }
+            });
+        },
+        check () {
+          is(getValue(aEditor), "ABGHIef", description + "Convert 'ghi' to 'GHI'");
+        },
+      },
+      { test () {
+          // Commit composition
+          synthesizeComposition({ type: "compositioncommitasis" });
+        },
+        check () {
+          is(getValue(aEditor), "ABGHIef", description + "Commit 'GHI'");
+        },
+      },
+    ];
+
+    function doReframe(aEvent)
+    {
+      aEvent.target.style.overflow =
+        aEvent.target.style.overflow != "hidden" ? "hidden" : "auto";
+    }
+    aEditor.focus();
+    aEditor.addEventListener(aEventType, doReframe);
+
+    for (const currentTest of tests) {
+      currentTest.test();
+      await waitForEventLoops(20);
+      currentTest.check();
+      await waitForTick();
+    }
+
+    await new Promise(resolve => {
+      aEditor.style.overflow = "auto";
+      aEditor.removeEventListener(aEventType, doReframe);
+      requestAnimationFrame(() => { SimpleTest.executeSoon(resolve); });
+    });
+  }
+
+  // TODO: Add "beforeinput" case.
+  input.value = "";
+  await runEditorReframeTest(input, window, "input");
+  input.value = "";
+  await runEditorReframeTest(input, window, "compositionupdate");
+  textarea.value = "";
+  await runEditorReframeTest(textarea, window, "input");
+  textarea.value = "";
+  await runEditorReframeTest(textarea, window, "compositionupdate");
+  contenteditable.innerHTML = "";
+  await runEditorReframeTest(contenteditable, windowOfContenteditable, "input");
+  contenteditable.innerHTML = "";
+  await runEditorReframeTest(contenteditable, windowOfContenteditable, "compositionupdate");
+}
+
+async function runIMEContentObserverTest()
+{
+  let notifications = [];
+  let onReceiveNotifications = null;
+  function callback(aTIP, aNotification)
+  {
+    if (aNotification.type != "notify-end-input-transaction") {
+      notifications.push(aNotification);
+    }
+    switch (aNotification.type) {
+      case "request-to-commit":
+        aTIP.commitComposition();
+        break;
+      case "request-to-cancel":
+        aTIP.cancelComposition();
+        break;
+    }
+    if (onReceiveNotifications) {
+      let resolve = onReceiveNotifications;
+      onReceiveNotifications = null;
+      SimpleTest.executeSoon(() => {
+        resolve();
+      });
+    }
+    return true;
+  }
+
+  function dumpUnexpectedNotifications(aDescription, aExpectedCount)
+  {
+    if (notifications.length <= aExpectedCount) {
+      return;
+    }
+    for (let i = aExpectedCount; i < notifications.length; i++) {
+      ok(false,
+         aDescription + " caused unexpected notification: " + notifications[i].type);
+    }
+  }
+
+  function promiseReceiveNotifications()
+  {
+    notifications = [];
+    return new Promise(resolve => {
+      onReceiveNotifications = resolve;
+    });
+  }
+
+  function flushNotifications()
+  {
+    return new Promise(resolve => {
+      // FYI: Dispatching non-op keyboard events causes forcibly flushing pending
+      //      notifications.
+      synthesizeKey("KEY_Unidentified", { code: "" });
+      SimpleTest.executeSoon(()=>{
+        notifications = [];
+        resolve();
+      });
+    });
+  }
+
+  function ensureToRemovePrecedingPositionChangeNotification(aDescription)
+  {
+    if (!notifications.length) {
+      return;
+    }
+    if (notifications[0].type != "notify-position-change") {
+      return;
+    }
+    // Sometimes, notify-position-change is notified first separately if
+    // the operation causes scroll or something.  Tests can ignore this.
+    ok(true, "notify-position-change", aDescription + "Unnecessary notify-position-change occurred, ignoring it");
+    notifications.shift();
+  }
+
+  // Bug 1374057 - On ubuntu 16.04 there are notify-position-change events that are
+  // recorded after all the other events so we remove them through this function.
+  function ensureToRemovePostPositionChangeNotification(aDescription, expectedCount)
+  {
+    if (!notifications.length) {
+      return;
+    }
+    if (notifications.length <= expectedCount) {
+      return;
+    }
+    if (notifications[notifications.length-1].type != "notify-position-change") {
+      return;
+    }
+    ok(true, "notify-position-change", aDescription + "Unnecessary notify-position-change occurred, ignoring it");
+    notifications.pop();
+  }
+
+  function getNativeText(aXPText)
+  {
+    if (kLF == "\n") {
+      return aXPText;
+    }
+    return aXPText.replace(/\n/g, kLF);
+  }
+
+  function checkPositionChangeNotification(aNotification, aDescription)
+  {
+    is(!aNotification || aNotification.type, "notify-position-change",
+       aDescription + " should cause position change notification");
+  }
+
+  function checkSelectionChangeNotification(aNotification, aDescription, aExpected)
+  {
+    is(!aNotification || aNotification.type, "notify-selection-change",
+       aDescription + " should cause selection change notification");
+    if (!aNotification || (aNotification.type != "notify-selection-change")) {
+      return;
+    }
+    is(aNotification.offset, aExpected.offset,
+       aDescription + " should cause selection change notification whose offset is " + aExpected.offset);
+    is(aNotification.text, aExpected.text,
+       aDescription + " should cause selection change notification whose text is '" + aExpected.text + "'");
+    is(aNotification.collapsed, !aExpected.text.length,
+       aDescription + " should cause selection change notification whose collapsed is " + (!aExpected.text.length));
+    is(aNotification.length, aExpected.text.length,
+       aDescription + " should cause selection change notification whose length is " + aExpected.text.length);
+    is(aNotification.reversed, aExpected.reversed || false,
+       aDescription + " should cause selection change notification whose reversed is " + (aExpected.reversed || false));
+    is(aNotification.writingMode, aExpected.writingMode || "horizontal-tb",
+       aDescription + " should cause selection change notification whose writingMode is '" + (aExpected.writingMode || "horizontal-tb"));
+  }
+
+  function checkTextChangeNotification(aNotification, aDescription, aExpected)
+  {
+    is(!aNotification || aNotification.type, "notify-text-change",
+       aDescription + " should cause text change notification");
+    if (!aNotification || aNotification.type != "notify-text-change") {
+      return;
+    }
+    is(aNotification.offset, aExpected.offset,
+       aDescription + " should cause text change notification whose offset is " + aExpected.offset);
+    is(aNotification.removedLength, aExpected.removedLength,
+       aDescription + " should cause text change notification whose removedLength is " + aExpected.removedLength);
+    is(aNotification.addedLength, aExpected.addedLength,
+       aDescription + " should cause text change notification whose addedLength is " + aExpected.addedLength);
+  }
+
+  async function testWithPlaintextEditor(aDescription, aElement, aTestLineBreaker)
+  {
+    aElement.value = "";
+    aElement.blur();
+    let doc = aElement.ownerDocument;
+    let win = doc.defaultView;
+    aElement.focus();
+    await flushNotifications();
+
+    // "a[]"
+    let description = aDescription + "typing 'a'";
+    let waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("a", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 0, removedLength: 0, addedLength: 1 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 1, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "ab[]"
+    description = aDescription + "typing 'b'";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("b", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 1, removedLength: 0, addedLength: 1 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 2, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "abc[]"
+    description = aDescription + "typing 'c'";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("c", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 2, removedLength: 0, addedLength: 1 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 3, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "ab[c]"
+    description = aDescription + "selecting 'c' with pressing Shift+ArrowLeft";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 2, text: "c", reversed: true });
+    ensureToRemovePostPositionChangeNotification(description, 1);
+    dumpUnexpectedNotifications(description, 1);
+
+    // "a[bc]"
+    description = aDescription + "selecting 'bc' with pressing Shift+ArrowLeft";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 1, text: "bc", reversed: true });
+    ensureToRemovePostPositionChangeNotification(description, 1);
+    dumpUnexpectedNotifications(description, 1);
+
+    // "[abc]"
+    description = aDescription + "selecting 'bc' with pressing Shift+ArrowLeft";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 0, text: "abc", reversed: true });
+    ensureToRemovePostPositionChangeNotification(description, 1);
+    dumpUnexpectedNotifications(description, 1);
+
+    // "[]abc"
+    description = aDescription + "collapsing selection to the left-most with pressing ArrowLeft";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowLeft", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 0, text: "" });
+    ensureToRemovePostPositionChangeNotification(description, 1);
+    dumpUnexpectedNotifications(description, 1);
+
+    // "[a]bc"
+    description = aDescription + "selecting 'a' with pressing Shift+ArrowRight";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowRight", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 0, text: "a" });
+    ensureToRemovePostPositionChangeNotification(description, 1);
+    dumpUnexpectedNotifications(description, 1);
+
+    // "[ab]c"
+    description = aDescription + "selecting 'ab' with pressing Shift+ArrowRight";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowRight", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 0, text: "ab" });
+    ensureToRemovePostPositionChangeNotification(description, 1);
+    dumpUnexpectedNotifications(description, 1);
+
+    // "[]c"
+    description = aDescription + "deleting 'ab' with pressing Delete";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 0, removedLength: 2, addedLength: 0 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 0, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "[]"
+    description = aDescription + "deleting following 'c' with pressing Delete";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 0, removedLength: 1, addedLength: 0 });
+    checkPositionChangeNotification(notifications[1], description);
+    ensureToRemovePostPositionChangeNotification(description, 2);
+    dumpUnexpectedNotifications(description, 2);
+
+    // "abc[]"
+    synthesizeKey("a", {}, win, callback);
+    synthesizeKey("b", {}, win, callback);
+    synthesizeKey("c", {}, win, callback);
+    await flushNotifications();
+
+    // "ab[]"
+    description = aDescription + "deleting 'c' with pressing Backspace";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Backspace", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 2, removedLength: 1, addedLength: 0 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 2, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "[ab]"
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await flushNotifications();
+
+    // "[]"
+    description = aDescription + "deleting 'ab' with pressing Backspace";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Backspace", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 0, removedLength: 2, addedLength: 0 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 0, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "abcd[]"
+    synthesizeKey("a", {}, win, callback);
+    synthesizeKey("b", {}, win, callback);
+    synthesizeKey("c", {}, win, callback);
+    synthesizeKey("d", {}, win, callback);
+    await flushNotifications();
+
+    // "a[bc]d"
+    synthesizeKey("KEY_ArrowLeft", {}, win, callback);
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await flushNotifications();
+
+    // "a[]d"
+    description = aDescription + "deleting 'bc' with pressing Backspace";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Backspace", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 1, removedLength: 2, addedLength: 0 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 1, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "a[bc]d"
+    synthesizeKey("b", {}, win, callback);
+    synthesizeKey("c", {}, win, callback);
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await flushNotifications();
+
+    // "aB[]d"
+    description = aDescription + "replacing 'bc' with 'B' with pressing Shift+B";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("B", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 1, removedLength: 2, addedLength: 1 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 2, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+
+    if (!aTestLineBreaker) {
+      return;
+    }
+
+    // "aB\n[]d"
+    description = aDescription + "inserting a line break after 'B' with pressing Enter";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Enter", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 2, removedLength: 0, addedLength: kLFLen });
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("aB\n").length, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "aB[]d"
+    description = aDescription + "removing a line break after 'B' with pressing Backspace";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Backspace", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 2, removedLength: kLFLen, addedLength: 0 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 2, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "a[B]d"
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await flushNotifications();
+
+    // "a\n[]d"
+    description = aDescription + "replacing 'B' with a line break with pressing Enter";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Enter", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 1, removedLength: 1, addedLength: kLFLen });
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("a\n").length, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "a[\n]d"
+    description = aDescription + "selecting '\n' with pressing Shift+ArrowLeft";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 1, text: kLF, reversed: true });
+    ensureToRemovePostPositionChangeNotification(description, 1);
+    dumpUnexpectedNotifications(description, 1);
+
+    // "a[]d"
+    description = aDescription + "removing selected '\n' with pressing Delete";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 1, removedLength: kLFLen, addedLength: 0 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 1, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+
+    // ab\ncd\nef\ngh\n[]
+    description = aDescription + "setting the value property to 'ab\ncd\nef\ngh\n'";
+    waitNotifications = promiseReceiveNotifications();
+    aElement.value = "ab\ncd\nef\ngh\n";
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 0, removedLength: 2, addedLength: getNativeText("ab\ncd\nef\ngh\n").length });
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("ab\ncd\nef\ngh\n").length, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+
+    // []
+    description = aDescription + "setting the value property to ''";
+    waitNotifications = promiseReceiveNotifications();
+    aElement.value = "";
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 0, removedLength: getNativeText("ab\ncd\nef\ngh\n").length, addedLength: 0 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 0, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    ensureToRemovePostPositionChangeNotification(description, 3);
+    dumpUnexpectedNotifications(description, 3);
+  }
+
+  async function testWithHTMLEditor(aDescription, aElement, aDefaultParagraphSeparator)
+  {
+    let doc = aElement.ownerDocument;
+    let win = doc.defaultView;
+    let sel = doc.getSelection();
+    let inDesignMode = doc.designMode == "on";
+    let offsetAtStart = 0;
+    let offsetAtContainer = 0;
+    let isDefaultParagraphSeparatorBlock = aDefaultParagraphSeparator != "br";
+    doc.execCommand("defaultParagraphSeparator", false, aDefaultParagraphSeparator);
+
+    // "[]", "<p>[]</p>" or "<div>[]</div>"
+    switch (aDefaultParagraphSeparator) {
+      case "br":
+        aElement.innerHTML = "";
+        break;
+      case "p":
+      case "div":
+        // eslint-disable-next-line no-unsanitized/property
+        aElement.innerHTML = "<" + aDefaultParagraphSeparator + "></" + aDefaultParagraphSeparator + ">";
+        sel.collapse(aElement.firstChild, 0);
+        offsetAtContainer = offsetAtStart + kLFLen;
+        break;
+      default:
+        ok(false, aDescription + "aDefaultParagraphSeparator is illegal value");
+        await flushNotifications();
+        return;
+    }
+
+    if (inDesignMode) {
+      win.focus();
+    } else {
+      aElement.focus();
+    }
+    await flushNotifications();
+
+    // "a[]"
+    let description = aDescription + "typing 'a'";
+    let waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("a", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer, removedLength: 0, addedLength: 1 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 1 + offsetAtContainer, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "ab[]"
+    description = aDescription + "typing 'b'";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("b", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 1 + offsetAtContainer, removedLength: 0, addedLength: 1 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 2 + offsetAtContainer, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "abc[]"
+    description = aDescription + "typing 'c'";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("c", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 2 + offsetAtContainer, removedLength: 0, addedLength: 1 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 3 + offsetAtContainer, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "ab[c]"
+    description = aDescription + "selecting 'c' with pressing Shift+ArrowLeft";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 2 + offsetAtContainer, text: "c", reversed: true });
+    dumpUnexpectedNotifications(description, 1);
+
+    // "a[bc]"
+    description = aDescription + "selecting 'bc' with pressing Shift+ArrowLeft";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 1 + offsetAtContainer, text: "bc", reversed: true });
+    dumpUnexpectedNotifications(description, 1);
+
+    // "[abc]"
+    description = aDescription + "selecting 'bc' with pressing Shift+ArrowLeft";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer, text: "abc", reversed: true });
+    dumpUnexpectedNotifications(description, 1);
+
+    // "[]abc"
+    description = aDescription + "collapsing selection to the left-most with pressing ArrowLeft";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowLeft", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer, text: "" });
+    dumpUnexpectedNotifications(description, 1);
+
+    // "[a]bc"
+    description = aDescription + "selecting 'a' with pressing Shift+ArrowRight";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowRight", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer, text: "a" });
+    dumpUnexpectedNotifications(description, 1);
+
+    // "[ab]c"
+    description = aDescription + "selecting 'ab' with pressing Shift+ArrowRight";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowRight", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer, text: "ab" });
+    dumpUnexpectedNotifications(description, 1);
+
+    // "[]c"
+    description = aDescription + "deleting 'ab' with pressing Delete";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer, removedLength: 2, addedLength: 0 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 0 + offsetAtContainer, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "[]"
+    description = aDescription + "deleting following 'c' with pressing Delete";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer, removedLength: 1, addedLength: kLFLen });
+    checkPositionChangeNotification(notifications[1], description);
+    dumpUnexpectedNotifications(description, 2);
+
+    // "abc[]"
+    synthesizeKey("a", {}, win, callback);
+    synthesizeKey("b", {}, win, callback);
+    synthesizeKey("c", {}, win, callback);
+    await flushNotifications();
+
+    // "ab[]"
+    description = aDescription + "deleting 'c' with pressing Backspace";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Backspace", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 2 + offsetAtContainer, removedLength: 1, addedLength: 0 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 2 + offsetAtContainer, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "[ab]"
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await flushNotifications();
+
+    // "[]"
+    description = aDescription + "deleting 'ab' with pressing Backspace";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Backspace", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer, removedLength: 2, addedLength: 0 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 0 + offsetAtContainer, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "abcd[]"
+    synthesizeKey("a", {}, win, callback);
+    synthesizeKey("b", {}, win, callback);
+    synthesizeKey("c", {}, win, callback);
+    synthesizeKey("d", {}, win, callback);
+    await flushNotifications();
+
+    // "a[bc]d"
+    synthesizeKey("KEY_ArrowLeft", {}, win, callback);
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await flushNotifications();
+
+    // "a[]d"
+    description = aDescription + "deleting 'bc' with pressing Backspace";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Backspace", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 1 + offsetAtContainer, removedLength: 2, addedLength: 0 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 1 + offsetAtContainer, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "a[bc]d"
+    synthesizeKey("b", {}, win, callback);
+    synthesizeKey("c", {}, win, callback);
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await flushNotifications();
+
+    // "aB[]d"
+    description = aDescription + "replacing 'bc' with 'B' with pressing Shift+B";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("B", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 1 + offsetAtContainer, removedLength: 2, addedLength: 1 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 2 + offsetAtContainer, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "aB<br>[]d" or "<block>ab</block><block>[]d</block>"
+    description = aDescription + "inserting a line break after 'B' with pressing Enter";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Enter", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    if (isDefaultParagraphSeparatorBlock) {
+      // Splitting current block causes removing "<block>aB" and inserting "<block>aB</block><block>".
+      checkTextChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer - kLFLen, removedLength: getNativeText("\naB").length, addedLength: getNativeText("\naB\n").length });
+    } else {
+      // Oddly, inserting <br> causes removing "aB" and inserting "ab<br>".
+      checkTextChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer, removedLength: 2, addedLength: getNativeText("ab\n").length });
+    }
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("aB\n").length + offsetAtContainer, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "aB[]d"
+    description = aDescription + "removing a line break after 'B' with pressing Backspace";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Backspace", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    if (isDefaultParagraphSeparatorBlock) {
+      // Joining two blocks causes removing both block elements and inserting new block element.
+      checkTextChangeNotification(notifications[0], description, { offset: offsetAtContainer - kLFLen, removedLength: getNativeText("\naB\nd").length, addedLength: getNativeText("\naBd").length });
+      checkSelectionChangeNotification(notifications[1], description, { offset: 2 + offsetAtContainer, text: "" });
+      checkPositionChangeNotification(notifications[2], description);
+      dumpUnexpectedNotifications(description, 3);
+    } else {
+      checkTextChangeNotification(notifications[0], description, { offset: 2 + offsetAtContainer, removedLength: kLFLen, addedLength: 0 });
+      is(notifications.length, 3, description + " should cause 3 notifications");
+      is(notifications[1] && notifications[1].type, "notify-selection-change", description + " should cause selection change notification");
+      is(notifications[2] && notifications[2].type, "notify-position-change", description + " should cause position change notification");
+    }
+
+    // "a[B]d"
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await flushNotifications();
+
+    // "a<br>[]d" or "<block>a</block><block>[]d</block>"
+    description = aDescription + "replacing 'B' with a line break with pressing Enter";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Enter", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    if (isDefaultParagraphSeparatorBlock) {
+      // Splitting current block causes removing "<block>aB" and inserting "<block>aB</block><block>".
+      checkTextChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer - kLFLen, removedLength: getNativeText("\naB").length, addedLength: getNativeText("\na\n").length });
+    } else {
+      checkTextChangeNotification(notifications[0], description, { offset: 1 + offsetAtContainer, removedLength: 1, addedLength: kLFLen });
+    }
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("a\n").length + offsetAtContainer, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "a[<br>]d" or "<block>a[</block><block>]d</block>"
+    description = aDescription + "selecting '\\n' with pressing Shift+ArrowLeft";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_ArrowLeft", {shiftKey: true}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkSelectionChangeNotification(notifications[0], description, { offset: 1 + offsetAtContainer, text: kLF, reversed: true });
+    dumpUnexpectedNotifications(description, 1);
+
+    // "a[]d"
+    description = aDescription + "removing selected '\\n' with pressing Delete";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    if (isDefaultParagraphSeparatorBlock) {
+      // Joining the blocks causes removing "<block>a</block><block>d</block>" and inserting "<block>ad</block>".
+      checkTextChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer - kLFLen, removedLength: getNativeText("\na\nd").length, addedLength: getNativeText("\nad").length });
+    } else {
+      checkTextChangeNotification(notifications[0], description, { offset: 1 + offsetAtContainer, removedLength: kLFLen, addedLength: 0 });
+    }
+    checkSelectionChangeNotification(notifications[1], description, { offset: 1 + offsetAtContainer, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // aElement.innerHTML = "<div>1<div>2<div>3</div>4</div>5</div>"
+    description = aDescription + "inserting HTML which has nested block elements";
+    waitNotifications = promiseReceiveNotifications();
+    aElement.innerHTML = "<div>1<div>2<div>3</div>4</div>5</div>";
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    // There is <br> after the end of the line.  Therefore, removed length includes a line breaker length.
+    if (isDefaultParagraphSeparatorBlock) {
+      checkTextChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer - kLFLen, removedLength: getNativeText("\nad\n").length, addedLength: getNativeText("\n1\n2\n345").length });
+    } else {
+      checkTextChangeNotification(notifications[0], description, { offset: 0 + offsetAtContainer, removedLength: 2 + kLFLen, addedLength: getNativeText("\n1\n2\n345").length });
+    }
+    checkSelectionChangeNotification(notifications[1], description, { offset: 0, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "<div>1[<div>2<div>3</div>4</div>]5</div>" and removing selection
+    sel.setBaseAndExtent(aElement.firstChild.firstChild, 1, aElement.firstChild.childNodes.item(2), 0);
+    await flushNotifications();
+    description = aDescription + "deleting child nodes with pressing Delete key";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    is(aElement.innerHTML, "<div>15</div>", description + " should remove '<div>2<div>3</div>4</div>'");
+    checkTextChangeNotification(notifications[0], description, { offset: getNativeText("\n1").length + offsetAtStart, removedLength: getNativeText("\n2\n34").length, addedLength: 0 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("\n1").length + offsetAtStart, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "<div>1[<div>2<div>3</div>]4</div>5</div>" and removing selection
+    aElement.innerHTML = "<div>1<div>2<div>3</div>4</div>5</div>";
+    sel.setBaseAndExtent(aElement.firstChild.firstChild, 1, aElement.firstChild.childNodes.item(1).childNodes.item(2), 0);
+    await flushNotifications();
+    description = aDescription + "deleting child nodes (partially #1) with pressing Delete key";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    is(aElement.innerHTML, "<div>145</div>", description + " should remove '<div>2<div>3</div></div>'");
+    // It causes removing '<div>2<div>3</div>4</div>' and inserting '4'.
+    checkTextChangeNotification(notifications[0], description, { offset: getNativeText("\n1").length + offsetAtStart, removedLength: getNativeText("\n2\n34").length, addedLength: 1 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("\n1").length + offsetAtStart, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "<div>1[<div>2<div>]3</div>4</div>5</div>" and removing selection
+    aElement.innerHTML = "<div>1<div>2<div>3</div>4</div>5</div>";
+    sel.setBaseAndExtent(aElement.firstChild.firstChild, 1, aElement.firstChild.childNodes.item(1).childNodes.item(1).firstChild, 0);
+    await flushNotifications();
+    description = aDescription + "deleting child nodes (partially #2) with pressing Delete key";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    is(aElement.innerHTML, "<div>13<div>4</div>5</div>", description + " should remove '<div>2</div>'");
+    // It causes removing '1<div>2<div>3</div></div>' and inserting '13<div>'.
+    checkTextChangeNotification(notifications[0], description, { offset: kLFLen + offsetAtStart, removedLength: getNativeText("1\n2\n3").length, addedLength: getNativeText("13\n").length });
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("\n1").length + offsetAtStart, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "<div>1<div>2<div>3[</div>4</div>]5</div>" and removing selection
+    aElement.innerHTML = "<div>1<div>2<div>3</div>4</div>5</div>";
+    sel.setBaseAndExtent(aElement.firstChild.childNodes.item(1).childNodes.item(1).firstChild, 1, aElement.firstChild.childNodes.item(2), 0);
+    await flushNotifications();
+    description = aDescription + "deleting child nodes (partially #3) with pressing Delete key";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    is(aElement.innerHTML, "<div>1<div>2<div>35</div></div></div>", description + " should remove '4'");
+    // It causes removing '45' and inserting '5'.
+    checkTextChangeNotification(notifications[0], description, { offset: getNativeText("\n1\n2\n3").length + offsetAtStart, removedLength: 2, addedLength: 1 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("\n1\n2\n3").length + offsetAtStart, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // aElement.innerHTML = "<div>1<div>2<div>3</div>4</div>5<div>6<div>7</div>8</div>9</div>"
+    description = aDescription + "inserting HTML which has a pair of nested block elements";
+    waitNotifications = promiseReceiveNotifications();
+    aElement.innerHTML = "<div>1<div>2<div>3</div>4</div>5<div>6<div>7</div>8</div>9</div>";
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    checkTextChangeNotification(notifications[0], description, { offset: 0 + offsetAtStart, removedLength: getNativeText("\n1\n2\n35").length, addedLength: getNativeText("\n1\n2\n345\n6\n789").length });
+    checkSelectionChangeNotification(notifications[1], description, { offset: 0 + offsetAtStart, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "<div>1<div>2<div>3[</div>4</div>5<div>6<div>]7</div>8</div>9</div>" and removing selection
+    sel.setBaseAndExtent(aElement.firstChild.childNodes.item(1).childNodes.item(1).firstChild, 1, aElement.firstChild.childNodes.item(3).childNodes.item(1).firstChild, 0);
+    await flushNotifications();
+    description = aDescription + "deleting child nodes (between same level descendants) with pressing Delete key";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    is(aElement.innerHTML, "<div>1<div>2<div>37</div></div><div>8</div>9</div>", description + " should remove '456<div>7'");
+    // It causes removing '<div>3</div>4</div>5<div>6<div>7</div>' and inserting '<div>37</div><div>'.
+    checkTextChangeNotification(notifications[0], description, { offset: getNativeText("\n1\n2").length + offsetAtStart, removedLength: getNativeText("\n345\n6\n7").length, addedLength: getNativeText("\n37\n").length });
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("\n1\n2\n3").length + offsetAtStart, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "<div>1<div>2[<div>3</div>4</div>5<div>6<div>]7</div>8</div>9</div>" and removing selection
+    aElement.innerHTML = "<div>1<div>2<div>3</div>4</div>5<div>6<div>7</div>8</div>9</div>";
+    sel.setBaseAndExtent(aElement.firstChild.childNodes.item(1).firstChild, 1, aElement.firstChild.childNodes.item(3).childNodes.item(1).firstChild, 0);
+    await flushNotifications();
+    description = aDescription + "deleting child nodes (between different level descendants #1) with pressing Delete key";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    is(aElement.innerHTML, "<div>1<div>27</div><div>8</div>9</div>", description + " should remove '<div>2<div>3</div>4</div>5<div>6<div>7</div>'");
+    // It causes removing '<div>2<div>3</div>4</div>5<div>6<div>7</div>' and inserting '<div>27</div>'.
+    checkTextChangeNotification(notifications[0], description, { offset: getNativeText("\n1").length + offsetAtStart, removedLength: getNativeText("\n2\n345\n6\n7").length, addedLength: getNativeText("\n27\n").length });
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("\n1\n2").length + offsetAtStart, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "<div>1<div>2[<div>3</div>4</div>5<div>6<div>7</div>8</div>]9</div>" and removing selection
+    aElement.innerHTML = "<div>1<div>2<div>3</div>4</div>5<div>6<div>7</div>8</div>9</div>";
+    sel.setBaseAndExtent(aElement.firstChild.childNodes.item(1).firstChild, 1, aElement.firstChild.childNodes.item(4), 0);
+    await flushNotifications();
+    description = aDescription + "deleting child nodes (between different level descendants #2) with pressing Delete key";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    is(aElement.innerHTML, "<div>1<div>29</div></div>", description + " should remove '<div>3</div>4</div>5<div>6<div>7</div>8</div>'");
+    // It causes removing '<div>3</div>4</div>5</div>6<div>7</div>8</div>9' and inserting '9</div>'.
+    checkTextChangeNotification(notifications[0], description, { offset: getNativeText("\n1\n2").length + offsetAtStart, removedLength: getNativeText("\n345\n6\n789").length, addedLength: 1 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("\n1\n2").length + offsetAtStart, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "<div>1<div>2<div>3[</div>4</div>5<div>]6<div>7</div>8</div>9</div>" and removing selection
+    aElement.innerHTML = "<div>1<div>2<div>3</div>4</div>5<div>6<div>7</div>8</div>9</div>";
+    sel.setBaseAndExtent(aElement.firstChild.childNodes.item(1).childNodes.item(1).firstChild, 1, aElement.firstChild.childNodes.item(3).firstChild, 0);
+    await flushNotifications();
+    description = aDescription + "deleting child nodes (between different level descendants #3) with pressing Delete key";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    is(aElement.innerHTML, "<div>1<div>2<div>36<div>7</div>8</div></div>9</div>", description + " should remove '<div>36<div>7</div>8</div>'");
+    // It causes removing '<div>3</div>4</div>5<div>6<div>7</div>8</div>' and inserting '<div>36<div>7</div>8</div>'.
+    checkTextChangeNotification(notifications[0], description, { offset: getNativeText("\n1\n2").length + offsetAtStart, removedLength: getNativeText("\n345\n6\n78").length, addedLength: getNativeText("\n36\n78").length });
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("\n1\n2\n3").length + offsetAtStart, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "<div>1<div>2<div>3[</div>4</div>5<div>6<div>7</div>8</div>]9</div>" and removing selection
+    aElement.innerHTML = "<div>1<div>2<div>3</div>4</div>5<div>6<div>7</div>8</div>9</div>";
+    sel.setBaseAndExtent(aElement.firstChild.childNodes.item(1).childNodes.item(1).firstChild, 1, aElement.firstChild.childNodes.item(4), 0);
+    await flushNotifications();
+    description = aDescription + "deleting child nodes (between different level descendants #4) with pressing Delete key";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Delete", {}, win, callback);
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    is(aElement.innerHTML, "<div>1<div>2<div>39</div></div></div>", description + " should remove '</div>4</div>5<div>6<div>7</div>8</div>'");
+    // It causes removing '</div>4</div>5<div>6<div>7</div>8</div>' and inserting '<div>36<div>7</div>8</div>'.
+    checkTextChangeNotification(notifications[0], description, { offset: getNativeText("\n1\n2\n3").length + offsetAtStart, removedLength: getNativeText("45\n6\n789").length, addedLength: getNativeText("9").length });
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("\n1\n2\n3").length + offsetAtStart, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "<p>abc</p><p><br></p><p>{<br>}</p>" and removing second paragraph with DOM API
+    aElement.innerHTML = "<p>abc</p><p><br></p><p><br></p>";
+    sel.collapse(aElement.firstChild.nextSibling.nextSibling, 0);
+    await flushNotifications();
+    description = aDescription + "deleting previous paragraph with DOM API";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Unidentified", { code: "" }, win, callback);  // For setting the callback to recode notifications
+    aElement.firstChild.nextSibling.remove();
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    is(aElement.innerHTML, "<p>abc</p><p><br></p>", description + " the second paragraph should've been removed");
+    checkTextChangeNotification(notifications[0], description, { offset: getNativeText("\nabc").length + offsetAtStart, removedLength: getNativeText("\n\n").length, addedLength: 0 });
+    checkSelectionChangeNotification(notifications[1], description, { offset: getNativeText("\nabc\n").length + offsetAtStart, text: "" });
+    checkPositionChangeNotification(notifications[2], description);
+    dumpUnexpectedNotifications(description, 3);
+
+    // "<p>abc</p><p>{<br>}</p><p><br></p>" and removing last paragraph with DOM API
+    aElement.innerHTML = "<p>abc</p><p><br></p><p><br></p>";
+    sel.collapse(aElement.firstChild.nextSibling, 0);
+    await flushNotifications();
+    description = aDescription + "deleting next paragraph with DOM API";
+    waitNotifications = promiseReceiveNotifications();
+    synthesizeKey("KEY_Unidentified", { code: "" }, win, callback);  // For setting the callback to recode notifications
+    aElement.firstChild.nextSibling.nextSibling.remove();
+    await waitNotifications;
+    ensureToRemovePrecedingPositionChangeNotification();
+    is(aElement.innerHTML, "<p>abc</p><p><br></p>", description + " the last paragraph should've been removed");
+    checkTextChangeNotification(notifications[0], description, { offset: getNativeText("\nabc\n\n").length + offsetAtStart, removedLength: getNativeText("\n\n").length, addedLength: 0 });
+    checkPositionChangeNotification(notifications[1], description);
+    dumpUnexpectedNotifications(description, 2);
+  }
+
+  await testWithPlaintextEditor("runIMEContentObserverTest with input element: ", input, false);
+  await testWithPlaintextEditor("runIMEContentObserverTest with textarea element: ", textarea, true);
+  await testWithHTMLEditor("runIMEContentObserverTest with contenteditable (defaultParagraphSeparator is br): ", contenteditable, "br");
+  await testWithHTMLEditor("runIMEContentObserverTest with contenteditable (defaultParagraphSeparator is p): ", contenteditable, "p");
+  await testWithHTMLEditor("runIMEContentObserverTest with contenteditable (defaultParagraphSeparator is div): ", contenteditable, "div");
+  // XXX Due to the difference of HTML editor behavior between designMode and contenteditable,
+  //     testWithHTMLEditor() gets some unexpected behavior.  However, IMEContentObserver is
+  //     not depend on editor's detail.  So, we should investigate this issue later.  It's not
+  //     so important for now.
+  // await testWithHTMLEditor("runIMEContentObserverTest in designMode (defaultParagraphSeparator is br): ", iframe2.contentDocument.body, "br");
+  // await testWithHTMLEditor("runIMEContentObserverTest in designMode (defaultParagraphSeparator is p): ", iframe2.contentDocument.body, "p");
+  // await testWithHTMLEditor("runIMEContentObserverTest in designMode (defaultParagraphSeparator is div): ", iframe2.contentDocument.body, "div");
+}
+
+async function runPasswordMaskDelayTest() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["editor.password.mask_delay", 600],
+          ["editor.password.testing.mask_delay", true],
+         ],
+  });
+
+  let iframe5 = document.getElementById("iframe5");
+  let iframe6 = document.getElementById("iframe6");
+  let inputWindow = iframe5.contentWindow;
+  let passwordWindow = iframe6.contentWindow;
+
+  let inputElement = iframe5.contentDocument.getElementById("input");
+  let passwordElement = iframe6.contentDocument.getElementById("password");
+
+  const kMask = passwordElement.editor.passwordMask;
+
+  function promiseAllPasswordMasked() {
+    return new Promise(resolve => {
+      passwordElement.addEventListener("MozLastInputMasked", resolve, {once: true});
+    });
+  }
+
+  function checkSnapshots(aResult, aReference, aMatch, aDescription) {
+    let [correct, data1, data2] = compareSnapshots(aResult, aReference, true);
+    is(correct, aMatch, `${aDescription}\nREFTEST   IMAGE 1 (TEST): ${data1}\nREFTEST   IMAGE 2 (REFERENCE): ${data2}`);
+  }
+
+  // First character input
+  passwordElement.value = "";
+  passwordElement.focus();
+  let waitForMaskingLastInput = promiseAllPasswordMasked();
+  synthesizeKey("a");
+  let unmaskedResult = await snapshotWindow(passwordWindow, true);
+  await waitForMaskingLastInput;
+  let maskedResult = await snapshotWindow(passwordWindow, true);
+
+  inputElement.value = "a";
+  inputElement.focus();
+  inputElement.setSelectionRange(1, 1);
+  let unmaskedReference = await snapshotWindow(inputWindow, true);
+  inputElement.value = kMask;
+  inputElement.setSelectionRange(1, 1);
+  let maskedReference = await snapshotWindow(inputWindow, true);
+  checkSnapshots(unmaskedResult, unmaskedReference, true,
+                 "runPasswordMaskDelayTest(): first inputted character should be unmasked for a while");
+  checkSnapshots(maskedResult, maskedReference, true,
+                 "runPasswordMaskDelayTest(): first inputted character should be masked after a while");
+
+  // Second character input
+  passwordElement.value = "a";
+  passwordElement.focus();
+  passwordElement.setSelectionRange(1, 1);
+  waitForMaskingLastInput = promiseAllPasswordMasked();
+  synthesizeKey("b");
+  unmaskedResult = await snapshotWindow(passwordWindow, true);
+  await waitForMaskingLastInput;
+  maskedResult = await snapshotWindow(passwordWindow, true);
+
+  inputElement.value = `${kMask}b`;
+  inputElement.focus();
+  inputElement.setSelectionRange(2, 2);
+  unmaskedReference = await snapshotWindow(inputWindow, true);
+  inputElement.value = `${kMask}${kMask}`;
+  inputElement.setSelectionRange(2, 2);
+  maskedReference = await snapshotWindow(inputWindow, true);
+  checkSnapshots(unmaskedResult, unmaskedReference, true,
+                 "runPasswordMaskDelayTest(): second inputted character should be unmasked for a while");
+  checkSnapshots(maskedResult, maskedReference, true,
+                 "runPasswordMaskDelayTest(): second inputted character should be masked after a while");
+
+  // Typing new character should mask the previous unmasked characters
+  passwordElement.value = "ab";
+  passwordElement.focus();
+  passwordElement.setSelectionRange(2, 2);
+  waitForMaskingLastInput = promiseAllPasswordMasked();
+  synthesizeKey("c");
+  synthesizeKey("d");
+  unmaskedResult = await snapshotWindow(passwordWindow, true);
+  await waitForMaskingLastInput;
+  maskedResult = await snapshotWindow(passwordWindow, true);
+
+  inputElement.value = `${kMask}${kMask}${kMask}d`;
+  inputElement.focus();
+  inputElement.setSelectionRange(4, 4);
+  unmaskedReference = await snapshotWindow(inputWindow, true);
+  inputElement.value = `${kMask}${kMask}${kMask}${kMask}`;
+  inputElement.setSelectionRange(4, 4);
+  maskedReference = await snapshotWindow(inputWindow, true);
+  checkSnapshots(unmaskedResult, unmaskedReference, true,
+                 "runPasswordMaskDelayTest(): forth character input should mask the third character");
+  checkSnapshots(maskedResult, maskedReference, true,
+                 "runPasswordMaskDelayTest(): forth inputted character should be masked after a while");
+
+  // Typing middle of password should unmask the last input character
+  passwordElement.value = "abcd";
+  passwordElement.focus();
+  passwordElement.setSelectionRange(2, 2);
+  waitForMaskingLastInput = promiseAllPasswordMasked();
+  synthesizeKey("e");
+  unmaskedResult = await snapshotWindow(passwordWindow, true);
+  await waitForMaskingLastInput;
+  maskedResult = await snapshotWindow(passwordWindow, true);
+
+  inputElement.value = `${kMask}${kMask}e${kMask}${kMask}`;
+  inputElement.focus();
+  inputElement.setSelectionRange(3, 3);
+  unmaskedReference = await snapshotWindow(inputWindow, true);
+  inputElement.value = `${kMask}${kMask}${kMask}${kMask}${kMask}`;
+  inputElement.setSelectionRange(3, 3);
+  maskedReference = await snapshotWindow(inputWindow, true);
+  checkSnapshots(unmaskedResult, unmaskedReference, true,
+                 "runPasswordMaskDelayTest(): inserted character should be unmasked for a while");
+  checkSnapshots(maskedResult, maskedReference, true,
+                 "runPasswordMaskDelayTest(): inserted character should be masked after a while");
+
+  // Composition string should be unmasked for a while, and shouldn't be committed at masking
+  passwordElement.value = "ab";
+  passwordElement.focus();
+  passwordElement.setSelectionRange(1, 1);
+  waitForMaskingLastInput = promiseAllPasswordMasked();
+  synthesizeCompositionChange(
+    { composition:
+      { string: "c",
+        clauses: [{ length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE }],
+      },
+      caret: { start: 1, length: 0 },
+    });
+  unmaskedResult = await snapshotWindow(passwordWindow, true);
+  await waitForMaskingLastInput;
+  maskedResult = await snapshotWindow(passwordWindow, true);
+  is(getEditor(passwordElement).composing, true,
+     "runPasswordMaskDelayTest(): composition shouldn't be commited at masking the composing string #1");
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter" } });
+
+  inputElement.value = `${kMask}${kMask}`;
+  inputElement.focus();
+  inputElement.setSelectionRange(1, 1);
+  synthesizeCompositionChange(
+    { composition:
+      { string: "c",
+        clauses: [{ length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE }],
+      },
+      caret: { start: 1, length: 0 },
+    });
+  unmaskedReference = await snapshotWindow(inputWindow, true);
+  synthesizeCompositionChange(
+    { composition:
+      { string: kMask,
+        clauses: [{ length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE }],
+      },
+      caret: { start: 1, length: 0 },
+    });
+  maskedReference = await snapshotWindow(inputWindow, true);
+  checkSnapshots(unmaskedResult, unmaskedReference, true,
+                 "runPasswordMaskDelayTest(): composing character should be unmasked for a while");
+  checkSnapshots(maskedResult, maskedReference, true,
+                 "runPasswordMaskDelayTest(): composing character should be masked after a while");
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter" } });
+
+  // Updating composition string should unmask the composition string for a while
+  passwordElement.value = "ab";
+  passwordElement.focus();
+  passwordElement.setSelectionRange(1, 1);
+  waitForMaskingLastInput = promiseAllPasswordMasked();
+  synthesizeCompositionChange(
+    { composition:
+      { string: "c",
+        clauses: [{ length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE }],
+      },
+      caret: { start: 1, length: 0 },
+    });
+  await waitForMaskingLastInput;
+  waitForMaskingLastInput = promiseAllPasswordMasked();
+  synthesizeCompositionChange(
+    { composition:
+      { string: "d",
+        clauses: [{ length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE }],
+      },
+      caret: { start: 1, length: 0 },
+    });
+  unmaskedResult = await snapshotWindow(passwordWindow, true);
+  await waitForMaskingLastInput;
+  maskedResult = await snapshotWindow(passwordWindow, true);
+  is(getEditor(passwordElement).composing, true,
+     "runPasswordMaskDelayTest(): composition shouldn't be commited at masking the composing string #2");
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter" } });
+
+  inputElement.value = `${kMask}${kMask}`;
+  inputElement.focus();
+  inputElement.setSelectionRange(1, 1);
+  synthesizeCompositionChange(
+    { composition:
+      { string: "d",
+        clauses: [{ length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE }],
+      },
+      caret: { start: 1, length: 0 },
+    });
+  unmaskedReference = await snapshotWindow(inputWindow, true);
+  synthesizeCompositionChange(
+    { composition:
+      { string: kMask,
+        clauses: [{ length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE }],
+      },
+      caret: { start: 1, length: 0 },
+    });
+  maskedReference = await snapshotWindow(inputWindow, true);
+  checkSnapshots(unmaskedResult, unmaskedReference, true,
+                 "runPasswordMaskDelayTest(): updated composing character should be unmasked for a while");
+  checkSnapshots(maskedResult, maskedReference, true,
+                 "runPasswordMaskDelayTest(): updated composing character should be masked after a while");
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter" } });
+
+  // Composing multi-characters should be unmasked for a while.
+  passwordElement.value = "ab";
+  passwordElement.focus();
+  passwordElement.setSelectionRange(1, 1);
+  waitForMaskingLastInput = promiseAllPasswordMasked();
+  synthesizeCompositionChange(
+    { composition:
+      { string: "c",
+        clauses: [{ length: 1, attr: COMPOSITION_ATTR_RAW_CLAUSE }],
+      },
+      caret: { start: 1, length: 0 },
+    });
+  await waitForMaskingLastInput;
+  waitForMaskingLastInput = promiseAllPasswordMasked();
+  synthesizeCompositionChange(
+    { composition:
+      { string: "cd",
+        clauses: [{ length: 2, attr: COMPOSITION_ATTR_RAW_CLAUSE }],
+      },
+      caret: { start: 2, length: 0 },
+    });
+  unmaskedResult = await snapshotWindow(passwordWindow, true);
+  await waitForMaskingLastInput;
+  maskedResult = await snapshotWindow(passwordWindow, true);
+  is(getEditor(passwordElement).composing, true,
+     "runPasswordMaskDelayTest(): composition shouldn't be commited at masking the composing string #3");
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter" } });
+
+  inputElement.value = `${kMask}${kMask}`;
+  inputElement.focus();
+  inputElement.setSelectionRange(1, 1);
+  synthesizeCompositionChange(
+    { composition:
+      { string: "cd",
+        clauses: [{ length: 2, attr: COMPOSITION_ATTR_RAW_CLAUSE }],
+      },
+      caret: { start: 2, length: 0 },
+    });
+  unmaskedReference = await snapshotWindow(inputWindow, true);
+  synthesizeCompositionChange(
+    { composition:
+      { string: `${kMask}${kMask}`,
+        clauses: [{ length: 2, attr: COMPOSITION_ATTR_RAW_CLAUSE }],
+      },
+      caret: { start: 2, length: 0 },
+    });
+  maskedReference = await snapshotWindow(inputWindow, true);
+  checkSnapshots(unmaskedResult, unmaskedReference, true,
+                 "runPasswordMaskDelayTest(): all of composing string should be unmasked for a while");
+  checkSnapshots(maskedResult, maskedReference, true,
+                 "runPasswordMaskDelayTest(): all of composing string should be masked after a while");
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter" } });
+
+  // Committing composition should make the commit string unmasked.
+  passwordElement.value = "ab";
+  passwordElement.focus();
+  passwordElement.setSelectionRange(1, 1);
+  waitForMaskingLastInput = promiseAllPasswordMasked();
+  synthesizeCompositionChange(
+    { composition:
+      { string: "cd",
+        clauses: [{ length: 2, attr: COMPOSITION_ATTR_RAW_CLAUSE }],
+      },
+      caret: { start: 2, length: 0 },
+    });
+  await waitForMaskingLastInput;
+  waitForMaskingLastInput = promiseAllPasswordMasked();
+  synthesizeComposition({ type: "compositioncommitasis", key: { key: "KEY_Enter" } });
+  unmaskedResult = await snapshotWindow(passwordWindow, true);
+  await waitForMaskingLastInput;
+  maskedResult = await snapshotWindow(passwordWindow, true);
+
+  inputElement.value = `${kMask}cd${kMask}`;
+  inputElement.focus();
+  inputElement.setSelectionRange(3, 3);
+  unmaskedReference = await snapshotWindow(inputWindow, true);
+  inputElement.value = `${kMask}${kMask}${kMask}${kMask}`;
+  inputElement.setSelectionRange(3, 3);
+  maskedReference = await snapshotWindow(inputWindow, true);
+  checkSnapshots(unmaskedResult, unmaskedReference, true,
+                 "runPasswordMaskDelayTest(): committed string should be unmasked for a while");
+  checkSnapshots(maskedResult, maskedReference, true,
+                 "runPasswordMaskDelayTest(): committed string should be masked after a while");
+}
+
+async function runTest()
+{
+  await SpecialPowers.pushPrefEnv({
+    set: [["dom.input_events.beforeinput.enabled", true]],
+  });
+
+  window.addEventListener("unload", window.arguments[0].SimpleTest.finish, {once: true, capture: true});
+
+  contenteditable = document.getElementById("iframe4").contentDocument.getElementById("contenteditable");
+  windowOfContenteditable = document.getElementById("iframe4").contentWindow;
+  textareaInFrame = iframe.contentDocument.getElementById("textarea");
+
+  contenteditableBySpan = document.getElementById("iframe7").contentDocument.getElementById("contenteditable");
+  windowOfContenteditableBySpan = document.getElementById("iframe7").contentWindow;
+
+  await runIMEContentObserverTest();
+  await runEditorReframeTests();
+  await runAsyncForceCommitTest();
+  await runRemoveContentTest();
+  await runPanelTest();
+  await runPasswordMaskDelayTest();
+  await runBug1584901Test();
+
+  runUndoRedoTest();
+  runCompositionTest();
+  runCompositionCommitAsIsTest();
+  runCompositionCommitTest();
+  runCompositionEventTest();
+  runQueryTextRectInContentEditableTest();
+  runCharAtPointTest(textarea, "textarea in the document");
+  runCharAtPointAtOutsideTest();
+  runSetSelectionEventTest();
+  runQueryTextContentEventTest();
+  runQuerySelectionEventTest();
+  runQueryIMESelectionTest();
+  runQueryContentEventRelativeToInsertionPoint();
+  runQueryPasswordTest();
+  runCSSTransformTest();
+  runBug722639Test();
+  runBug1375825Test();
+  runBug1530649Test();
+  runBug1571375Test();
+  runBug1675313Test();
+  runCommitCompositionWithSpaceKey();
+  runForceCommitTest();
+  runNestedSettingValue();
+  runBug811755Test();
+  runIsComposingTest();
+  runRedundantChangeTest();
+  runNotRedundantChangeTest();
+  runNativeLineBreakerTest();
+  runControlCharTest();
+  runFrameTest();
+  runMaxLengthTest();
+
+  window.close();
+}
+
+window.arguments[0].SimpleTest.waitForFocus(runTest, window);
+
+]]>
+</script>
+
+</window>
author	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-28 14:29:10 +0000
committer	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-28 14:29:10 +0000
commit	2aa4a82499d4becd2284cdb482213d541b8804dd (patch)
tree	b80bf8bf13c3766139fbacc530efd0dd9d54394c /widget/tests/window_composition_text_querycontent.xhtml
parent	Initial commit. (diff)
download	firefox-upstream.tar.xz firefox-upstream.zip