1 files changed, 197 insertions, 0 deletions
diff --git a/editor/libeditor/tests/test_join_split_node_direction_change_command.html b/editor/libeditor/tests/test_join_split_node_direction_change_command.html
new file mode 100644
index 0000000000..79faab4806
--- /dev/null
+++ b/editor/libeditor/tests/test_join_split_node_direction_change_command.html
@@ -0,0 +1,197 @@
+<!doctype html>
+<html>
+<head>
+<meta charset="utf-8">
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+<script>
+"use strict";
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.waitForFocus(async () => {
+  let iframe = document.querySelector("iframe");
+  async function resetIframe() {
+    iframe?.remove();
+    iframe = document.createElement("iframe");
+    document.body.appendChild(iframe);
+    iframe.srcdoc = "<body></body>";
+    if (iframe.contentDocument?.readyState != "complete") {
+      await new Promise(resolve => iframe.addEventListener("load", resolve, {once: true}));
+    }
+    iframe.contentWindow.focus();
+  }
+
+  await resetIframe();
+  await SpecialPowers.pushPrefEnv({
+    set: [["editor.join_split_direction.compatible_with_the_other_browsers", false]],
+  });
+  (function test_command_when_legacy_behavior_is_enabled_by_default() {
+    iframe.contentDocument.body.innerHTML = "<div contenteditable><br></div>";
+    ok(
+      iframe.contentDocument.queryCommandSupported("enableCompatibleJoinSplitDirection"),
+      "test_command_when_legacy_behavior_is_enabled_by_default: command should be supported"
+    );
+    ok(
+      iframe.contentDocument.queryCommandEnabled("enableCompatibleJoinSplitDirection"),
+      "test_command_when_legacy_behavior_is_enabled_by_default: command should be enabled"
+    );
+    ok(
+      !iframe.contentDocument.queryCommandState("enableCompatibleJoinSplitDirection"),
+      "test_command_when_legacy_behavior_is_enabled_by_default: command state should be false"
+    );
+    is(
+      iframe.contentDocument.queryCommandValue("enableCompatibleJoinSplitDirection"),
+      "",
+      "test_command_when_legacy_behavior_is_enabled_by_default: command value should be empty string"
+    );
+    ok(
+      iframe.contentDocument.execCommand("enableCompatibleJoinSplitDirection", false, "true"),
+      "test_command_when_legacy_behavior_is_enabled_by_default: command to enable it should return true"
+    );
+  })();
+
+  (function test_command_when_enabling_new_behavior_when_legacy_one_is_enabled_by_default() {
+    ok(
+      iframe.contentDocument.queryCommandSupported("enableCompatibleJoinSplitDirection"),
+      "test_command_when_enabling_new_behavior_when_legacy_one_is_enabled_by_default: command should be supported"
+    );
+    ok(
+      iframe.contentDocument.queryCommandEnabled("enableCompatibleJoinSplitDirection"),
+      "test_command_when_enabling_new_behavior_when_legacy_one_is_enabled_by_default: command should be enabled"
+    );
+    ok(
+      iframe.contentDocument.queryCommandState("enableCompatibleJoinSplitDirection"),
+      "test_command_when_enabling_new_behavior_when_legacy_one_is_enabled_by_default: command state should be true"
+    );
+    is(
+      iframe.contentDocument.queryCommandValue("enableCompatibleJoinSplitDirection"),
+      "",
+      "test_command_when_enabling_new_behavior_when_legacy_one_is_enabled_by_default: command value should be empty string"
+    );
+
+    ok(
+      iframe.contentDocument.execCommand("enableCompatibleJoinSplitDirection", false, "false"),
+      "test_command_when_enabling_new_behavior_when_legacy_one_is_enabled_by_default: command to disable it should return true"
+    );
+  })();
+
+  (function test_command_when_disabling_new_behavior_when_the_legacy_one_is_enabled_by_default() {
+    ok(
+      iframe.contentDocument.queryCommandSupported("enableCompatibleJoinSplitDirection"),
+      "test_command_when_disabling_new_behavior_when_the_legacy_one_is_enabled_by_default: command should be supported"
+    );
+    ok(
+      iframe.contentDocument.queryCommandEnabled("enableCompatibleJoinSplitDirection"),
+      "test_command_when_disabling_new_behavior_when_the_legacy_one_is_enabled_by_default: command should be enabled"
+    );
+    ok(
+      !iframe.contentDocument.queryCommandState("enableCompatibleJoinSplitDirection"),
+      "test_command_when_disabling_new_behavior_when_the_legacy_one_is_enabled_by_default: command state should be false"
+    );
+    is(
+      iframe.contentDocument.queryCommandValue("enableCompatibleJoinSplitDirection"),
+      "",
+      "test_command_when_disabling_new_behavior_when_the_legacy_one_is_enabled_by_default: command value should be empty string"
+    );
+  })();
+
+  await resetIframe();
+  await SpecialPowers.pushPrefEnv({
+    set: [["editor.join_split_direction.compatible_with_the_other_browsers", true]],
+  });
+  (function test_command_when_new_behavior_is_enabled_by_default() {
+    iframe.contentDocument.body.innerHTML = "<div contenteditable><br></div>";
+    ok(
+      iframe.contentDocument.queryCommandSupported("enableCompatibleJoinSplitDirection"),
+      "test_command_when_new_behavior_is_enabled_by_default: command should be supported"
+    );
+    ok(
+      iframe.contentDocument.queryCommandEnabled("enableCompatibleJoinSplitDirection"),
+      "test_command_when_new_behavior_is_enabled_by_default: command should be enabled"
+    );
+    ok(
+      iframe.contentDocument.queryCommandState("enableCompatibleJoinSplitDirection"),
+      "test_command_when_new_behavior_is_enabled_by_default: command state should be true"
+    );
+    is(
+      iframe.contentDocument.queryCommandValue("enableCompatibleJoinSplitDirection"),
+      "",
+      "test_command_when_new_behavior_is_enabled_by_default: command value should be empty string"
+    );
+    ok(
+      !iframe.contentDocument.execCommand("enableCompatibleJoinSplitDirection", false, "false"),
+      "test_command_when_new_behavior_is_enabled_by_default: command to disable it should return false"
+    );
+    ok(
+      iframe.contentDocument.queryCommandState("enableCompatibleJoinSplitDirection"),
+      "test_command_when_new_behavior_is_enabled_by_default: command state should be true even after executing the command to disable it"
+    );
+  })();
+
+  await resetIframe();
+  await SpecialPowers.pushPrefEnv({
+    set: [["editor.join_split_direction.compatible_with_the_other_browsers", false]],
+  });
+  (function test_command_disabled_after_joining_nodes() {
+    iframe.contentDocument.body.innerHTML = "<div contenteditable><p>abc</p><p>def</p></div>";
+    iframe.contentWindow.getSelection().collapse(iframe.contentDocument.querySelector("p + p").firstChild, 0);
+    iframe.contentDocument.execCommand("delete");
+    ok(
+      !iframe.contentDocument.execCommand("enableCompatibleJoinSplitDirection", false, "true"),
+      "test_command_disabled_after_joining_nodes: command should return false"
+    );
+    ok(
+      !iframe.contentDocument.queryCommandEnabled("enableCompatibleJoinSplitDirection"),
+      "test_command_when_new_behavior_is_enabled_by_default: command should be disabled"
+    );
+    ok(
+      !iframe.contentDocument.queryCommandState("enableCompatibleJoinSplitDirection"),
+      "test_command_when_new_behavior_is_enabled_by_default: command state should be false"
+    );
+  })();
+
+  await resetIframe();
+  await SpecialPowers.pushPrefEnv({
+    set: [["editor.join_split_direction.compatible_with_the_other_browsers", false]],
+  });
+  (function test_command_disabled_after_splitting_node() {
+    iframe.contentDocument.body.innerHTML = "<div contenteditable><p>abcdef</p></div>";
+    iframe.contentWindow.getSelection().collapse(iframe.contentDocument.querySelector("p").firstChild, "abc".length);
+    iframe.contentDocument.execCommand("insertParagraph");
+    ok(
+      !iframe.contentDocument.execCommand("enableCompatibleJoinSplitDirection", false, "true"),
+      "test_command_disabled_after_splitting_node: command should return false"
+    );
+    ok(
+      !iframe.contentDocument.queryCommandEnabled("enableCompatibleJoinSplitDirection"),
+      "test_command_disabled_after_splitting_node: command should be disabled"
+    );
+    ok(
+      !iframe.contentDocument.queryCommandState("enableCompatibleJoinSplitDirection"),
+      "test_command_disabled_after_splitting_node: command state should be false"
+    );
+  })();
+
+  await resetIframe();
+  await SpecialPowers.pushPrefEnv({
+    set: [["editor.join_split_direction.compatible_with_the_other_browsers", false]],
+  });
+  (function test_split_direction_after_enabling_new_direction() {
+    iframe.contentDocument.body.innerHTML = "<div contenteditable><p>abc</p><p>def</p></div>";
+    const rightP = iframe.contentDocument.querySelector("p + p");
+    iframe.contentWindow.getSelection().collapse(rightP.firstChild, 0);
+    iframe.contentDocument.execCommand("delete");
+    iframe.contentDocument.execCommand("enableCompatibleJoinSplitDirection", false, "true");
+    is(
+      iframe.contentDocument.querySelector("p"),
+      rightP,
+      "test_split_direction_after_enabling_new_direction: left paragraph should be deleted and right paragraph should be alive"
+    );
+  })();
+
+  SimpleTest.finish();
+});
+</script>
+</head>
+<body></body>
+</html>