1 files changed, 119 insertions, 0 deletions
diff --git a/accessible/tests/browser/e10s/browser_events_textchange.js b/accessible/tests/browser/e10s/browser_events_textchange.js
new file mode 100644
index 0000000000..f39ecea8c4
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_events_textchange.js
@@ -0,0 +1,119 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+function checkTextChangeEvent(
+  event,
+  id,
+  text,
+  start,
+  end,
+  isInserted,
+  isFromUserInput
+) {
+  let tcEvent = event.QueryInterface(nsIAccessibleTextChangeEvent);
+  is(tcEvent.start, start, `Correct start offset for ${prettyName(id)}`);
+  is(tcEvent.length, end - start, `Correct length for ${prettyName(id)}`);
+  is(
+    tcEvent.isInserted,
+    isInserted,
+    `Correct isInserted flag for ${prettyName(id)}`
+  );
+  is(tcEvent.modifiedText, text, `Correct text for ${prettyName(id)}`);
+  is(
+    tcEvent.isFromUserInput,
+    isFromUserInput,
+    `Correct value of isFromUserInput for ${prettyName(id)}`
+  );
+  ok(
+    tcEvent.accessibleDocument instanceof nsIAccessibleDocument,
+    "Accessible document not present."
+  );
+}
+
+async function changeText(browser, id, value, events) {
+  let onEvents = waitForOrderedEvents(
+    events.map(({ isInserted }) => {
+      let eventType = isInserted ? EVENT_TEXT_INSERTED : EVENT_TEXT_REMOVED;
+      return [eventType, id];
+    })
+  );
+  // Change text in the subtree.
+  await invokeContentTask(browser, [id, value], (contentId, contentValue) => {
+    content.document.getElementById(contentId).firstChild.textContent =
+      contentValue;
+  });
+  let resolvedEvents = await onEvents;
+
+  events.forEach(({ isInserted, str, offset }, idx) =>
+    checkTextChangeEvent(
+      resolvedEvents[idx],
+      id,
+      str,
+      offset,
+      offset + str.length,
+      isInserted,
+      false
+    )
+  );
+}
+
+async function removeTextFromInput(browser, id, value, start, end) {
+  let onTextRemoved = waitForEvent(EVENT_TEXT_REMOVED, id);
+  // Select text and delete it.
+  await invokeContentTask(
+    browser,
+    [id, start, end],
+    (contentId, contentStart, contentEnd) => {
+      let el = content.document.getElementById(contentId);
+      el.focus();
+      el.setSelectionRange(contentStart, contentEnd);
+    }
+  );
+  await invokeContentTask(browser, [], () => {
+    const { ContentTaskUtils } = ChromeUtils.importESModule(
+      "resource://testing-common/ContentTaskUtils.sys.mjs"
+    );
+    const EventUtils = ContentTaskUtils.getEventUtils(content);
+    EventUtils.sendChar("VK_DELETE", content);
+  });
+
+  let event = await onTextRemoved;
+  checkTextChangeEvent(event, id, value, start, end, false, true);
+}
+
+/**
+ * Test text change event and its interface:
+ *   - start
+ *   - length
+ *   - isInserted
+ *   - modifiedText
+ *   - isFromUserInput
+ */
+addAccessibleTask(
+  `
+  <p id="p">abc</p>
+  <input id="input" value="input" />`,
+  async function (browser) {
+    let events = [
+      { isInserted: false, str: "abc", offset: 0 },
+      { isInserted: true, str: "def", offset: 0 },
+    ];
+    await changeText(browser, "p", "def", events);
+
+    // Adding text should not send events with diffs for non-editable text.
+    // We do this to avoid screen readers reading out confusing diffs for
+    // live regions.
+    events = [
+      { isInserted: false, str: "def", offset: 0 },
+      { isInserted: true, str: "deDEFf", offset: 0 },
+    ];
+    await changeText(browser, "p", "deDEFf", events);
+
+    // Test isFromUserInput property.
+    await removeTextFromInput(browser, "input", "n", 1, 2);
+  },
+  { iframe: true, remoteIframe: true }
+);