1 files changed, 74 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 000000000..a1aed52d1
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_events_textchange.js
@@ -0,0 +1,74 @@
+/* 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/. */
+
+/* global EVENT_TEXT_INSERTED, EVENT_TEXT_REMOVED,
+          nsIAccessibleTextChangeEvent */
+
+'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)}`);
+}
+
+function* changeText(browser, id, value, events) {
+  let onEvents = waitForMultipleEvents(events.map(({ isInserted }) => {
+    let eventType = isInserted ? EVENT_TEXT_INSERTED : EVENT_TEXT_REMOVED;
+    return { id, eventType };
+  }));
+  // Change text in the subtree.
+  yield ContentTask.spawn(browser, [id, value], ([contentId, contentValue]) => {
+    content.document.getElementById(contentId).firstChild.textContent =
+      contentValue;
+  });
+  let resolvedEvents = yield onEvents;
+
+  events.forEach(({ isInserted, str, offset }, idx) =>
+    checkTextChangeEvent(resolvedEvents[idx],
+      id, str, offset, offset + str.length, isInserted, false));
+}
+
+function* removeTextFromInput(browser, id, value, start, end) {
+  let onTextRemoved = waitForEvent(EVENT_TEXT_REMOVED, id);
+  // Select text and delete it.
+  yield ContentTask.spawn(browser, [id, start, end], ([contentId, contentStart, contentEnd]) => {
+    let el = content.document.getElementById(contentId);
+    el.focus();
+    el.setSelectionRange(contentStart, contentEnd);
+  });
+  yield BrowserTestUtils.sendChar('VK_DELETE', browser);
+
+  let event = yield 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" />`, function*(browser) {
+  let events = [
+    { isInserted: false, str: 'abc', offset: 0 },
+    { isInserted: true, str: 'def', offset: 0 }
+  ];
+  yield changeText(browser, 'p', 'def', events);
+
+  events = [{ isInserted: true, str: 'DEF', offset: 2 }];
+  yield changeText(browser, 'p', 'deDEFf', events);
+
+  // Test isFromUserInput property.
+  yield removeTextFromInput(browser, 'input', 'n', 1, 2);
+});