Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

65 files changed, 12909 insertions, 0 deletions

diff --git a/accessible/tests/mochitest/events.js b/accessible/tests/mochitest/events.js
new file mode 100644
index 0000000000..a6c216e01d
--- /dev/null
+++ b/accessible/tests/mochitest/events.js
@@ -0,0 +1,2660 @@
+/* import-globals-from common.js */
+/* import-globals-from states.js */
+/* import-globals-from text.js */
+
+// XXX Bug 1425371 - enable no-redeclare and fix the issues with the tests.
+/* eslint-disable no-redeclare */
+
+// //////////////////////////////////////////////////////////////////////////////
+// Constants
+
+const EVENT_ALERT = nsIAccessibleEvent.EVENT_ALERT;
+const EVENT_ANNOUNCEMENT = nsIAccessibleEvent.EVENT_ANNOUNCEMENT;
+const EVENT_DESCRIPTION_CHANGE = nsIAccessibleEvent.EVENT_DESCRIPTION_CHANGE;
+const EVENT_DOCUMENT_LOAD_COMPLETE =
+  nsIAccessibleEvent.EVENT_DOCUMENT_LOAD_COMPLETE;
+const EVENT_DOCUMENT_RELOAD = nsIAccessibleEvent.EVENT_DOCUMENT_RELOAD;
+const EVENT_DOCUMENT_LOAD_STOPPED =
+  nsIAccessibleEvent.EVENT_DOCUMENT_LOAD_STOPPED;
+const EVENT_HIDE = nsIAccessibleEvent.EVENT_HIDE;
+const EVENT_FOCUS = nsIAccessibleEvent.EVENT_FOCUS;
+const EVENT_NAME_CHANGE = nsIAccessibleEvent.EVENT_NAME_CHANGE;
+const EVENT_MENU_START = nsIAccessibleEvent.EVENT_MENU_START;
+const EVENT_MENU_END = nsIAccessibleEvent.EVENT_MENU_END;
+const EVENT_MENUPOPUP_START = nsIAccessibleEvent.EVENT_MENUPOPUP_START;
+const EVENT_MENUPOPUP_END = nsIAccessibleEvent.EVENT_MENUPOPUP_END;
+const EVENT_OBJECT_ATTRIBUTE_CHANGED =
+  nsIAccessibleEvent.EVENT_OBJECT_ATTRIBUTE_CHANGED;
+const EVENT_REORDER = nsIAccessibleEvent.EVENT_REORDER;
+const EVENT_SCROLLING_START = nsIAccessibleEvent.EVENT_SCROLLING_START;
+const EVENT_SELECTION = nsIAccessibleEvent.EVENT_SELECTION;
+const EVENT_SELECTION_ADD = nsIAccessibleEvent.EVENT_SELECTION_ADD;
+const EVENT_SELECTION_REMOVE = nsIAccessibleEvent.EVENT_SELECTION_REMOVE;
+const EVENT_SELECTION_WITHIN = nsIAccessibleEvent.EVENT_SELECTION_WITHIN;
+const EVENT_SHOW = nsIAccessibleEvent.EVENT_SHOW;
+const EVENT_STATE_CHANGE = nsIAccessibleEvent.EVENT_STATE_CHANGE;
+const EVENT_TEXT_ATTRIBUTE_CHANGED =
+  nsIAccessibleEvent.EVENT_TEXT_ATTRIBUTE_CHANGED;
+const EVENT_TEXT_CARET_MOVED = nsIAccessibleEvent.EVENT_TEXT_CARET_MOVED;
+const EVENT_TEXT_INSERTED = nsIAccessibleEvent.EVENT_TEXT_INSERTED;
+const EVENT_TEXT_REMOVED = nsIAccessibleEvent.EVENT_TEXT_REMOVED;
+const EVENT_TEXT_SELECTION_CHANGED =
+  nsIAccessibleEvent.EVENT_TEXT_SELECTION_CHANGED;
+const EVENT_VALUE_CHANGE = nsIAccessibleEvent.EVENT_VALUE_CHANGE;
+const EVENT_TEXT_VALUE_CHANGE = nsIAccessibleEvent.EVENT_TEXT_VALUE_CHANGE;
+const EVENT_VIRTUALCURSOR_CHANGED =
+  nsIAccessibleEvent.EVENT_VIRTUALCURSOR_CHANGED;
+
+const kNotFromUserInput = 0;
+const kFromUserInput = 1;
+
+// //////////////////////////////////////////////////////////////////////////////
+// General
+
+/**
+ * Set up this variable to dump events into DOM.
+ */
+var gA11yEventDumpID = "";
+
+/**
+ * Set up this variable to dump event processing into console.
+ */
+var gA11yEventDumpToConsole = false;
+
+/**
+ * Set up this variable to dump event processing into error console.
+ */
+var gA11yEventDumpToAppConsole = false;
+
+/**
+ * Semicolon separated set of logging features.
+ */
+var gA11yEventDumpFeature = "";
+
+/**
+ * Function to detect HTML elements when given a node.
+ */
+function isHTMLElement(aNode) {
+  return (
+    aNode.nodeType == aNode.ELEMENT_NODE &&
+    aNode.namespaceURI == "http://www.w3.org/1999/xhtml"
+  );
+}
+
+function isXULElement(aNode) {
+  return (
+    aNode.nodeType == aNode.ELEMENT_NODE &&
+    aNode.namespaceURI ==
+      "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  );
+}
+
+/**
+ * Executes the function when requested event is handled.
+ *
+ * @param aEventType  [in] event type
+ * @param aTarget     [in] event target
+ * @param aFunc       [in] function to call when event is handled
+ * @param aContext    [in, optional] object in which context the function is
+ *                    called
+ * @param aArg1       [in, optional] argument passed into the function
+ * @param aArg2       [in, optional] argument passed into the function
+ */
+function waitForEvent(
+  aEventType,
+  aTargetOrFunc,
+  aFunc,
+  aContext,
+  aArg1,
+  aArg2
+) {
+  var handler = {
+    handleEvent: function handleEvent(aEvent) {
+      var target = aTargetOrFunc;
+      if (typeof aTargetOrFunc == "function") {
+        target = aTargetOrFunc.call();
+      }
+
+      if (target) {
+        if (target instanceof nsIAccessible && target != aEvent.accessible) {
+          return;
+        }
+
+        if (Node.isInstance(target) && target != aEvent.DOMNode) {
+          return;
+        }
+      }
+
+      unregisterA11yEventListener(aEventType, this);
+
+      window.setTimeout(function () {
+        aFunc.call(aContext, aArg1, aArg2);
+      }, 0);
+    },
+  };
+
+  registerA11yEventListener(aEventType, handler);
+}
+
+/**
+ * Generate mouse move over image map what creates image map accessible (async).
+ * See waitForImageMap() function.
+ */
+function waveOverImageMap(aImageMapID) {
+  var imageMapNode = getNode(aImageMapID);
+  synthesizeMouse(
+    imageMapNode,
+    10,
+    10,
+    { type: "mousemove" },
+    imageMapNode.ownerGlobal
+  );
+}
+
+/**
+ * Call the given function when the tree of the given image map is built.
+ */
+function waitForImageMap(aImageMapID, aTestFunc) {
+  waveOverImageMap(aImageMapID);
+
+  var imageMapAcc = getAccessible(aImageMapID);
+  if (imageMapAcc.firstChild) {
+    aTestFunc();
+    return;
+  }
+
+  waitForEvent(EVENT_REORDER, imageMapAcc, aTestFunc);
+}
+
+/**
+ * Register accessibility event listener.
+ *
+ * @param aEventType     the accessible event type (see nsIAccessibleEvent for
+ *                       available constants).
+ * @param aEventHandler  event listener object, when accessible event of the
+ *                       given type is handled then 'handleEvent' method of
+ *                       this object is invoked with nsIAccessibleEvent object
+ *                       as the first argument.
+ */
+function registerA11yEventListener(aEventType, aEventHandler) {
+  listenA11yEvents(true);
+  addA11yEventListener(aEventType, aEventHandler);
+}
+
+/**
+ * Unregister accessibility event listener. Must be called for every registered
+ * event listener (see registerA11yEventListener() function) when the listener
+ * is not needed.
+ */
+function unregisterA11yEventListener(aEventType, aEventHandler) {
+  removeA11yEventListener(aEventType, aEventHandler);
+  listenA11yEvents(false);
+}
+
+// //////////////////////////////////////////////////////////////////////////////
+// Event queue
+
+/**
+ * Return value of invoke method of invoker object. Indicates invoker was unable
+ * to prepare action.
+ */
+const INVOKER_ACTION_FAILED = 1;
+
+/**
+ * Return value of eventQueue.onFinish. Indicates eventQueue should not finish
+ * tests.
+ */
+const DO_NOT_FINISH_TEST = 1;
+
+/**
+ * Creates event queue for the given event type. The queue consists of invoker
+ * objects, each of them generates the event of the event type. When queue is
+ * started then every invoker object is asked to generate event after timeout.
+ * When event is caught then current invoker object is asked to check whether
+ * event was handled correctly.
+ *
+ * Invoker interface is:
+ *
+ *   var invoker = {
+ *     // Generates accessible event or event sequence. If returns
+ *     // INVOKER_ACTION_FAILED constant then stop tests.
+ *     invoke: function(){},
+ *
+ *     // [optional] Invoker's check of handled event for correctness.
+ *     check: function(aEvent){},
+ *
+ *     // [optional] Invoker's check before the next invoker is proceeded.
+ *     finalCheck: function(aEvent){},
+ *
+ *     // [optional] Is called when event of any registered type is handled.
+ *     debugCheck: function(aEvent){},
+ *
+ *     // [ignored if 'eventSeq' is defined] DOM node event is generated for
+ *     // (used in the case when invoker expects single event).
+ *     DOMNode getter: function() {},
+ *
+ *     // [optional] if true then event sequences are ignored (no failure if
+ *     // sequences are empty). Use you need to invoke an action, do some check
+ *     // after timeout and proceed a next invoker.
+ *     noEventsOnAction getter: function() {},
+ *
+ *     // Array of checker objects defining expected events on invoker's action.
+ *     //
+ *     // Checker object interface:
+ *     //
+ *     // var checker = {
+ *     //   * DOM or a11y event type. *
+ *     //   type getter: function() {},
+ *     //
+ *     //   * DOM node or accessible. *
+ *     //   target getter: function() {},
+ *     //
+ *     //   * DOM event phase (false - bubbling). *
+ *     //   phase getter: function() {},
+ *     //
+ *     //   * Callback, called to match handled event. *
+ *     //   match : function(aEvent) {},
+ *     //
+ *     //   * Callback, called when event is handled
+ *     //   check: function(aEvent) {},
+ *     //
+ *     //   * Checker ID *
+ *     //   getID: function() {},
+ *     //
+ *     //   * Event that don't have predefined order relative other events. *
+ *     //   async getter: function() {},
+ *     //
+ *     //   * Event that is not expected. *
+ *     //   unexpected getter: function() {},
+ *     //
+ *     //   * No other event of the same type is not allowed. *
+ *     //   unique getter: function() {}
+ *     // };
+ *     eventSeq getter() {},
+ *
+ *     // Array of checker objects defining unexpected events on invoker's
+ *     // action.
+ *     unexpectedEventSeq getter() {},
+ *
+ *     // The ID of invoker.
+ *     getID: function(){} // returns invoker ID
+ *   };
+ *
+ *   // Used to add a possible scenario of expected/unexpected events on
+ *   // invoker's action.
+ *  defineScenario(aInvokerObj, aEventSeq, aUnexpectedEventSeq)
+ *
+ *
+ * @param  aEventType  [in, optional] the default event type (isn't used if
+ *                      invoker defines eventSeq property).
+ */
+function eventQueue(aEventType) {
+  // public
+
+  /**
+   * Add invoker object into queue.
+   */
+  this.push = function eventQueue_push(aEventInvoker) {
+    this.mInvokers.push(aEventInvoker);
+  };
+
+  /**
+   * Start the queue processing.
+   */
+  this.invoke = function eventQueue_invoke() {
+    listenA11yEvents(true);
+
+    // XXX: Intermittent test_events_caretmove.html fails withouth timeout,
+    // see bug 474952.
+    this.processNextInvokerInTimeout(true);
+  };
+
+  /**
+   * This function is called when all events in the queue were handled.
+   * Override it if you need to be notified of this.
+   */
+  this.onFinish = function eventQueue_finish() {};
+
+  // private
+
+  /**
+   * Process next invoker.
+   */
+  // eslint-disable-next-line complexity
+  this.processNextInvoker = function eventQueue_processNextInvoker() {
+    // Some scenario was matched, we wait on next invoker processing.
+    if (this.mNextInvokerStatus == kInvokerCanceled) {
+      this.setInvokerStatus(
+        kInvokerNotScheduled,
+        "scenario was matched, wait for next invoker activation"
+      );
+      return;
+    }
+
+    this.setInvokerStatus(
+      kInvokerNotScheduled,
+      "the next invoker is processed now"
+    );
+
+    // Finish processing of the current invoker if any.
+    var testFailed = false;
+
+    var invoker = this.getInvoker();
+    if (invoker) {
+      if ("finalCheck" in invoker) {
+        invoker.finalCheck();
+      }
+
+      if (this.mScenarios && this.mScenarios.length) {
+        var matchIdx = -1;
+        for (var scnIdx = 0; scnIdx < this.mScenarios.length; scnIdx++) {
+          var eventSeq = this.mScenarios[scnIdx];
+          if (!this.areExpectedEventsLeft(eventSeq)) {
+            for (var idx = 0; idx < eventSeq.length; idx++) {
+              var checker = eventSeq[idx];
+              if (
+                (checker.unexpected && checker.wasCaught) ||
+                (!checker.unexpected && checker.wasCaught != 1)
+              ) {
+                break;
+              }
+            }
+
+            // Ok, we have matched scenario. Report it was completed ok. In
+            // case of empty scenario guess it was matched but if later we
+            // find out that non empty scenario was matched then it will be
+            // a final match.
+            if (idx == eventSeq.length) {
+              if (
+                matchIdx != -1 &&
+                !!eventSeq.length &&
+                this.mScenarios[matchIdx].length
+              ) {
+                ok(
+                  false,
+                  "We have a matched scenario at index " +
+                    matchIdx +
+                    " already."
+                );
+              }
+
+              if (matchIdx == -1 || eventSeq.length) {
+                matchIdx = scnIdx;
+              }
+
+              // Report everything is ok.
+              for (var idx = 0; idx < eventSeq.length; idx++) {
+                var checker = eventSeq[idx];
+
+                var typeStr = eventQueue.getEventTypeAsString(checker);
+                var msg =
+                  "Test with ID = '" + this.getEventID(checker) + "' succeed. ";
+
+                if (checker.unexpected) {
+                  ok(true, msg + `There's no unexpected '${typeStr}' event.`);
+                } else if (checker.todo) {
+                  todo(false, `Todo event '${typeStr}' was caught`);
+                } else {
+                  ok(true, `${msg} Event '${typeStr}' was handled.`);
+                }
+              }
+            }
+          }
+        }
+
+        // We don't have completely matched scenario. Report each failure/success
+        // for every scenario.
+        if (matchIdx == -1) {
+          testFailed = true;
+          for (var scnIdx = 0; scnIdx < this.mScenarios.length; scnIdx++) {
+            var eventSeq = this.mScenarios[scnIdx];
+            for (var idx = 0; idx < eventSeq.length; idx++) {
+              var checker = eventSeq[idx];
+
+              var typeStr = eventQueue.getEventTypeAsString(checker);
+              var msg =
+                "Scenario #" +
+                scnIdx +
+                " of test with ID = '" +
+                this.getEventID(checker) +
+                "' failed. ";
+
+              if (checker.wasCaught > 1) {
+                ok(false, msg + "Dupe " + typeStr + " event.");
+              }
+
+              if (checker.unexpected) {
+                if (checker.wasCaught) {
+                  ok(false, msg + "There's unexpected " + typeStr + " event.");
+                }
+              } else if (!checker.wasCaught) {
+                var rf = checker.todo ? todo : ok;
+                rf(false, `${msg} '${typeStr} event is missed.`);
+              }
+            }
+          }
+        }
+      }
+    }
+
+    this.clearEventHandler();
+
+    // Check if need to stop the test.
+    if (testFailed || this.mIndex == this.mInvokers.length - 1) {
+      listenA11yEvents(false);
+
+      var res = this.onFinish();
+      if (res != DO_NOT_FINISH_TEST) {
+        SimpleTest.executeSoon(SimpleTest.finish);
+      }
+
+      return;
+    }
+
+    // Start processing of next invoker.
+    invoker = this.getNextInvoker();
+
+    // Set up event listeners. Process a next invoker if no events were added.
+    if (!this.setEventHandler(invoker)) {
+      this.processNextInvoker();
+      return;
+    }
+
+    if (gLogger.isEnabled()) {
+      gLogger.logToConsole("Event queue: \n  invoke: " + invoker.getID());
+      gLogger.logToDOM("EQ: invoke: " + invoker.getID(), true);
+    }
+
+    var infoText = "Invoke the '" + invoker.getID() + "' test { ";
+    var scnCount = this.mScenarios ? this.mScenarios.length : 0;
+    for (var scnIdx = 0; scnIdx < scnCount; scnIdx++) {
+      infoText += "scenario #" + scnIdx + ": ";
+      var eventSeq = this.mScenarios[scnIdx];
+      for (var idx = 0; idx < eventSeq.length; idx++) {
+        infoText += eventSeq[idx].unexpected
+          ? "un"
+          : "" +
+            "expected '" +
+            eventQueue.getEventTypeAsString(eventSeq[idx]) +
+            "' event; ";
+      }
+    }
+    infoText += " }";
+    info(infoText);
+
+    if (invoker.invoke() == INVOKER_ACTION_FAILED) {
+      // Invoker failed to prepare action, fail and finish tests.
+      this.processNextInvoker();
+      return;
+    }
+
+    if (this.hasUnexpectedEventsScenario()) {
+      this.processNextInvokerInTimeout(true);
+    }
+  };
+
+  this.processNextInvokerInTimeout =
+    function eventQueue_processNextInvokerInTimeout(aUncondProcess) {
+      this.setInvokerStatus(kInvokerPending, "Process next invoker in timeout");
+
+      // No need to wait extra timeout when a) we know we don't need to do that
+      // and b) there's no any single unexpected event.
+      if (!aUncondProcess && this.areAllEventsExpected()) {
+        // We need delay to avoid events coalesce from different invokers.
+        var queue = this;
+        SimpleTest.executeSoon(function () {
+          queue.processNextInvoker();
+        });
+        return;
+      }
+
+      // Check in timeout invoker didn't fire registered events.
+      window.setTimeout(
+        function (aQueue) {
+          aQueue.processNextInvoker();
+        },
+        300,
+        this
+      );
+    };
+
+  /**
+   * Handle events for the current invoker.
+   */
+  // eslint-disable-next-line complexity
+  this.handleEvent = function eventQueue_handleEvent(aEvent) {
+    var invoker = this.getInvoker();
+    if (!invoker) {
+      // skip events before test was started
+      return;
+    }
+
+    if (!this.mScenarios) {
+      // Bad invoker object, error will be reported before processing of next
+      // invoker in the queue.
+      this.processNextInvoker();
+      return;
+    }
+
+    if ("debugCheck" in invoker) {
+      invoker.debugCheck(aEvent);
+    }
+
+    for (var scnIdx = 0; scnIdx < this.mScenarios.length; scnIdx++) {
+      var eventSeq = this.mScenarios[scnIdx];
+      for (var idx = 0; idx < eventSeq.length; idx++) {
+        var checker = eventSeq[idx];
+
+        // Search through handled expected events to report error if one of them
+        // is handled for a second time.
+        if (
+          !checker.unexpected &&
+          checker.wasCaught > 0 &&
+          eventQueue.isSameEvent(checker, aEvent)
+        ) {
+          checker.wasCaught++;
+          continue;
+        }
+
+        // Search through unexpected events, any match results in error report
+        // after this invoker processing (in case of matched scenario only).
+        if (checker.unexpected && eventQueue.compareEvents(checker, aEvent)) {
+          checker.wasCaught++;
+          continue;
+        }
+
+        // Report an error if we handled not expected event of unique type
+        // (i.e. event types are matched, targets differs).
+        if (
+          !checker.unexpected &&
+          checker.unique &&
+          eventQueue.compareEventTypes(checker, aEvent)
+        ) {
+          var isExpected = false;
+          for (var jdx = 0; jdx < eventSeq.length; jdx++) {
+            isExpected = eventQueue.compareEvents(eventSeq[jdx], aEvent);
+            if (isExpected) {
+              break;
+            }
+          }
+
+          if (!isExpected) {
+            ok(
+              false,
+              "Unique type " +
+                eventQueue.getEventTypeAsString(checker) +
+                " event was handled."
+            );
+          }
+        }
+      }
+    }
+
+    var hasMatchedCheckers = false;
+    for (var scnIdx = 0; scnIdx < this.mScenarios.length; scnIdx++) {
+      var eventSeq = this.mScenarios[scnIdx];
+
+      // Check if handled event matches expected sync event.
+      var nextChecker = this.getNextExpectedEvent(eventSeq);
+      if (nextChecker) {
+        if (eventQueue.compareEvents(nextChecker, aEvent)) {
+          this.processMatchedChecker(aEvent, nextChecker, scnIdx, eventSeq.idx);
+          hasMatchedCheckers = true;
+          continue;
+        }
+      }
+
+      // Check if handled event matches any expected async events.
+      var haveUnmatchedAsync = false;
+      for (idx = 0; idx < eventSeq.length; idx++) {
+        if (eventSeq[idx] instanceof orderChecker && haveUnmatchedAsync) {
+          break;
+        }
+
+        if (!eventSeq[idx].wasCaught) {
+          haveUnmatchedAsync = true;
+        }
+
+        if (!eventSeq[idx].unexpected && eventSeq[idx].async) {
+          if (eventQueue.compareEvents(eventSeq[idx], aEvent)) {
+            this.processMatchedChecker(aEvent, eventSeq[idx], scnIdx, idx);
+            hasMatchedCheckers = true;
+            break;
+          }
+        }
+      }
+    }
+
+    if (hasMatchedCheckers) {
+      var invoker = this.getInvoker();
+      if ("check" in invoker) {
+        invoker.check(aEvent);
+      }
+    }
+
+    for (idx = 0; idx < eventSeq.length; idx++) {
+      if (!eventSeq[idx].wasCaught) {
+        if (eventSeq[idx] instanceof orderChecker) {
+          eventSeq[idx].wasCaught++;
+        } else {
+          break;
+        }
+      }
+    }
+
+    // If we don't have more events to wait then schedule next invoker.
+    if (this.hasMatchedScenario()) {
+      if (this.mNextInvokerStatus == kInvokerNotScheduled) {
+        this.processNextInvokerInTimeout();
+      } else if (this.mNextInvokerStatus == kInvokerCanceled) {
+        this.setInvokerStatus(
+          kInvokerPending,
+          "Full match. Void the cancelation of next invoker processing"
+        );
+      }
+      return;
+    }
+
+    // If we have scheduled a next invoker then cancel in case of match.
+    if (this.mNextInvokerStatus == kInvokerPending && hasMatchedCheckers) {
+      this.setInvokerStatus(
+        kInvokerCanceled,
+        "Cancel the scheduled invoker in case of match"
+      );
+    }
+  };
+
+  // Helpers
+  this.processMatchedChecker = function eventQueue_function(
+    aEvent,
+    aMatchedChecker,
+    aScenarioIdx,
+    aEventIdx
+  ) {
+    aMatchedChecker.wasCaught++;
+
+    if ("check" in aMatchedChecker) {
+      aMatchedChecker.check(aEvent);
+    }
+
+    eventQueue.logEvent(
+      aEvent,
+      aMatchedChecker,
+      aScenarioIdx,
+      aEventIdx,
+      this.areExpectedEventsLeft(),
+      this.mNextInvokerStatus
+    );
+  };
+
+  this.getNextExpectedEvent = function eventQueue_getNextExpectedEvent(
+    aEventSeq
+  ) {
+    if (!("idx" in aEventSeq)) {
+      aEventSeq.idx = 0;
+    }
+
+    while (
+      aEventSeq.idx < aEventSeq.length &&
+      (aEventSeq[aEventSeq.idx].unexpected ||
+        aEventSeq[aEventSeq.idx].todo ||
+        aEventSeq[aEventSeq.idx].async ||
+        aEventSeq[aEventSeq.idx] instanceof orderChecker ||
+        aEventSeq[aEventSeq.idx].wasCaught > 0)
+    ) {
+      aEventSeq.idx++;
+    }
+
+    return aEventSeq.idx != aEventSeq.length ? aEventSeq[aEventSeq.idx] : null;
+  };
+
+  this.areExpectedEventsLeft = function eventQueue_areExpectedEventsLeft(
+    aScenario
+  ) {
+    function scenarioHasUnhandledExpectedEvent(aEventSeq) {
+      // Check if we have unhandled async (can be anywhere in the sequance) or
+      // sync expcected events yet.
+      for (var idx = 0; idx < aEventSeq.length; idx++) {
+        if (
+          !aEventSeq[idx].unexpected &&
+          !aEventSeq[idx].todo &&
+          !aEventSeq[idx].wasCaught &&
+          !(aEventSeq[idx] instanceof orderChecker)
+        ) {
+          return true;
+        }
+      }
+
+      return false;
+    }
+
+    if (aScenario) {
+      return scenarioHasUnhandledExpectedEvent(aScenario);
+    }
+
+    for (var scnIdx = 0; scnIdx < this.mScenarios.length; scnIdx++) {
+      var eventSeq = this.mScenarios[scnIdx];
+      if (scenarioHasUnhandledExpectedEvent(eventSeq)) {
+        return true;
+      }
+    }
+    return false;
+  };
+
+  this.areAllEventsExpected = function eventQueue_areAllEventsExpected() {
+    for (var scnIdx = 0; scnIdx < this.mScenarios.length; scnIdx++) {
+      var eventSeq = this.mScenarios[scnIdx];
+      for (var idx = 0; idx < eventSeq.length; idx++) {
+        if (eventSeq[idx].unexpected || eventSeq[idx].todo) {
+          return false;
+        }
+      }
+    }
+
+    return true;
+  };
+
+  this.isUnexpectedEventScenario =
+    function eventQueue_isUnexpectedEventsScenario(aScenario) {
+      for (var idx = 0; idx < aScenario.length; idx++) {
+        if (!aScenario[idx].unexpected && !aScenario[idx].todo) {
+          break;
+        }
+      }
+
+      return idx == aScenario.length;
+    };
+
+  this.hasUnexpectedEventsScenario =
+    function eventQueue_hasUnexpectedEventsScenario() {
+      if (this.getInvoker().noEventsOnAction) {
+        return true;
+      }
+
+      for (var scnIdx = 0; scnIdx < this.mScenarios.length; scnIdx++) {
+        if (this.isUnexpectedEventScenario(this.mScenarios[scnIdx])) {
+          return true;
+        }
+      }
+
+      return false;
+    };
+
+  this.hasMatchedScenario = function eventQueue_hasMatchedScenario() {
+    for (var scnIdx = 0; scnIdx < this.mScenarios.length; scnIdx++) {
+      var scn = this.mScenarios[scnIdx];
+      if (
+        !this.isUnexpectedEventScenario(scn) &&
+        !this.areExpectedEventsLeft(scn)
+      ) {
+        return true;
+      }
+    }
+    return false;
+  };
+
+  this.getInvoker = function eventQueue_getInvoker() {
+    return this.mInvokers[this.mIndex];
+  };
+
+  this.getNextInvoker = function eventQueue_getNextInvoker() {
+    return this.mInvokers[++this.mIndex];
+  };
+
+  this.setEventHandler = function eventQueue_setEventHandler(aInvoker) {
+    if (!("scenarios" in aInvoker) || !aInvoker.scenarios.length) {
+      var eventSeq = aInvoker.eventSeq;
+      var unexpectedEventSeq = aInvoker.unexpectedEventSeq;
+      if (!eventSeq && !unexpectedEventSeq && this.mDefEventType) {
+        eventSeq = [new invokerChecker(this.mDefEventType, aInvoker.DOMNode)];
+      }
+
+      if (eventSeq || unexpectedEventSeq) {
+        defineScenario(aInvoker, eventSeq, unexpectedEventSeq);
+      }
+    }
+
+    if (aInvoker.noEventsOnAction) {
+      return true;
+    }
+
+    this.mScenarios = aInvoker.scenarios;
+    if (!this.mScenarios || !this.mScenarios.length) {
+      ok(false, "Broken invoker '" + aInvoker.getID() + "'");
+      return false;
+    }
+
+    // Register event listeners.
+    for (var scnIdx = 0; scnIdx < this.mScenarios.length; scnIdx++) {
+      var eventSeq = this.mScenarios[scnIdx];
+
+      if (gLogger.isEnabled()) {
+        var msg =
+          "scenario #" +
+          scnIdx +
+          ", registered events number: " +
+          eventSeq.length;
+        gLogger.logToConsole(msg);
+        gLogger.logToDOM(msg, true);
+      }
+
+      // Do not warn about empty event sequances when more than one scenario
+      // was registered.
+      if (this.mScenarios.length == 1 && !eventSeq.length) {
+        ok(
+          false,
+          "Broken scenario #" +
+            scnIdx +
+            " of invoker '" +
+            aInvoker.getID() +
+            "'. No registered events"
+        );
+        return false;
+      }
+
+      for (var idx = 0; idx < eventSeq.length; idx++) {
+        eventSeq[idx].wasCaught = 0;
+      }
+
+      for (var idx = 0; idx < eventSeq.length; idx++) {
+        if (gLogger.isEnabled()) {
+          var msg = "registered";
+          if (eventSeq[idx].unexpected) {
+            msg += " unexpected";
+          }
+          if (eventSeq[idx].async) {
+            msg += " async";
+          }
+
+          msg +=
+            ": event type: " +
+            eventQueue.getEventTypeAsString(eventSeq[idx]) +
+            ", target: " +
+            eventQueue.getEventTargetDescr(eventSeq[idx], true);
+
+          gLogger.logToConsole(msg);
+          gLogger.logToDOM(msg, true);
+        }
+
+        var eventType = eventSeq[idx].type;
+        if (typeof eventType == "string") {
+          // DOM event
+          var target = eventQueue.getEventTarget(eventSeq[idx]);
+          if (!target) {
+            ok(false, "no target for DOM event!");
+            return false;
+          }
+          var phase = eventQueue.getEventPhase(eventSeq[idx]);
+          target.addEventListener(eventType, this, phase);
+        } else {
+          // A11y event
+          addA11yEventListener(eventType, this);
+        }
+      }
+    }
+
+    return true;
+  };
+
+  this.clearEventHandler = function eventQueue_clearEventHandler() {
+    if (!this.mScenarios) {
+      return;
+    }
+
+    for (var scnIdx = 0; scnIdx < this.mScenarios.length; scnIdx++) {
+      var eventSeq = this.mScenarios[scnIdx];
+      for (var idx = 0; idx < eventSeq.length; idx++) {
+        var eventType = eventSeq[idx].type;
+        if (typeof eventType == "string") {
+          // DOM event
+          var target = eventQueue.getEventTarget(eventSeq[idx]);
+          var phase = eventQueue.getEventPhase(eventSeq[idx]);
+          target.removeEventListener(eventType, this, phase);
+        } else {
+          // A11y event
+          removeA11yEventListener(eventType, this);
+        }
+      }
+    }
+    this.mScenarios = null;
+  };
+
+  this.getEventID = function eventQueue_getEventID(aChecker) {
+    if ("getID" in aChecker) {
+      return aChecker.getID();
+    }
+
+    var invoker = this.getInvoker();
+    return invoker.getID();
+  };
+
+  this.setInvokerStatus = function eventQueue_setInvokerStatus(
+    aStatus,
+    aLogMsg
+  ) {
+    this.mNextInvokerStatus = aStatus;
+
+    // Uncomment it to debug invoker processing logic.
+    // gLogger.log(eventQueue.invokerStatusToMsg(aStatus, aLogMsg));
+  };
+
+  this.mDefEventType = aEventType;
+
+  this.mInvokers = [];
+  this.mIndex = -1;
+  this.mScenarios = null;
+
+  this.mNextInvokerStatus = kInvokerNotScheduled;
+}
+
+// //////////////////////////////////////////////////////////////////////////////
+// eventQueue static members and constants
+
+const kInvokerNotScheduled = 0;
+const kInvokerPending = 1;
+const kInvokerCanceled = 2;
+
+eventQueue.getEventTypeAsString = function eventQueue_getEventTypeAsString(
+  aEventOrChecker
+) {
+  if (Event.isInstance(aEventOrChecker)) {
+    return aEventOrChecker.type;
+  }
+
+  if (aEventOrChecker instanceof nsIAccessibleEvent) {
+    return eventTypeToString(aEventOrChecker.eventType);
+  }
+
+  return typeof aEventOrChecker.type == "string"
+    ? aEventOrChecker.type
+    : eventTypeToString(aEventOrChecker.type);
+};
+
+eventQueue.getEventTargetDescr = function eventQueue_getEventTargetDescr(
+  aEventOrChecker,
+  aDontForceTarget
+) {
+  if (Event.isInstance(aEventOrChecker)) {
+    return prettyName(aEventOrChecker.originalTarget);
+  }
+
+  // XXXbz this block doesn't seem to be reachable...
+  if (Event.isInstance(aEventOrChecker)) {
+    return prettyName(aEventOrChecker.accessible);
+  }
+
+  var descr = aEventOrChecker.targetDescr;
+  if (descr) {
+    return descr;
+  }
+
+  if (aDontForceTarget) {
+    return "no target description";
+  }
+
+  var target = "target" in aEventOrChecker ? aEventOrChecker.target : null;
+  return prettyName(target);
+};
+
+eventQueue.getEventPhase = function eventQueue_getEventPhase(aChecker) {
+  return "phase" in aChecker ? aChecker.phase : true;
+};
+
+eventQueue.getEventTarget = function eventQueue_getEventTarget(aChecker) {
+  if ("eventTarget" in aChecker) {
+    switch (aChecker.eventTarget) {
+      case "element":
+        return aChecker.target;
+      case "document":
+      default:
+        return aChecker.target.ownerDocument;
+    }
+  }
+  return aChecker.target.ownerDocument;
+};
+
+eventQueue.compareEventTypes = function eventQueue_compareEventTypes(
+  aChecker,
+  aEvent
+) {
+  var eventType = Event.isInstance(aEvent) ? aEvent.type : aEvent.eventType;
+  return aChecker.type == eventType;
+};
+
+eventQueue.compareEvents = function eventQueue_compareEvents(aChecker, aEvent) {
+  if (!eventQueue.compareEventTypes(aChecker, aEvent)) {
+    return false;
+  }
+
+  // If checker provides "match" function then allow the checker to decide
+  // whether event is matched.
+  if ("match" in aChecker) {
+    return aChecker.match(aEvent);
+  }
+
+  var target1 = aChecker.target;
+  if (target1 instanceof nsIAccessible) {
+    var target2 = Event.isInstance(aEvent)
+      ? getAccessible(aEvent.target)
+      : aEvent.accessible;
+
+    return target1 == target2;
+  }
+
+  // If original target isn't suitable then extend interface to support target
+  // (original target is used in test_elm_media.html).
+  var target2 = Event.isInstance(aEvent)
+    ? aEvent.originalTarget
+    : aEvent.DOMNode;
+  return target1 == target2;
+};
+
+eventQueue.isSameEvent = function eventQueue_isSameEvent(aChecker, aEvent) {
+  // We don't have stored info about handled event other than its type and
+  // target, thus we should filter text change and state change events since
+  // they may occur on the same element because of complex changes.
+  return (
+    this.compareEvents(aChecker, aEvent) &&
+    !(aEvent instanceof nsIAccessibleTextChangeEvent) &&
+    !(aEvent instanceof nsIAccessibleStateChangeEvent)
+  );
+};
+
+eventQueue.invokerStatusToMsg = function eventQueue_invokerStatusToMsg(
+  aInvokerStatus,
+  aMsg
+) {
+  var msg = "invoker status: ";
+  switch (aInvokerStatus) {
+    case kInvokerNotScheduled:
+      msg += "not scheduled";
+      break;
+    case kInvokerPending:
+      msg += "pending";
+      break;
+    case kInvokerCanceled:
+      msg += "canceled";
+      break;
+  }
+
+  if (aMsg) {
+    msg += " (" + aMsg + ")";
+  }
+
+  return msg;
+};
+
+eventQueue.logEvent = function eventQueue_logEvent(
+  aOrigEvent,
+  aMatchedChecker,
+  aScenarioIdx,
+  aEventIdx,
+  aAreExpectedEventsLeft,
+  aInvokerStatus
+) {
+  // Dump DOM event information. Skip a11y event since it is dumped by
+  // gA11yEventObserver.
+  if (Event.isInstance(aOrigEvent)) {
+    var info = "Event type: " + eventQueue.getEventTypeAsString(aOrigEvent);
+    info += ". Target: " + eventQueue.getEventTargetDescr(aOrigEvent);
+    gLogger.logToDOM(info);
+  }
+
+  var infoMsg =
+    "unhandled expected events: " +
+    aAreExpectedEventsLeft +
+    ", " +
+    eventQueue.invokerStatusToMsg(aInvokerStatus);
+
+  var currType = eventQueue.getEventTypeAsString(aMatchedChecker);
+  var currTargetDescr = eventQueue.getEventTargetDescr(aMatchedChecker);
+  var consoleMsg =
+    "*****\nScenario " +
+    aScenarioIdx +
+    ", event " +
+    aEventIdx +
+    " matched: " +
+    currType +
+    "\n" +
+    infoMsg +
+    "\n*****";
+  gLogger.logToConsole(consoleMsg);
+
+  var emphText = "matched ";
+  var msg =
+    "EQ event, type: " +
+    currType +
+    ", target: " +
+    currTargetDescr +
+    ", " +
+    infoMsg;
+  gLogger.logToDOM(msg, true, emphText);
+};
+
+// //////////////////////////////////////////////////////////////////////////////
+// Action sequence
+
+/**
+ * Deal with action sequence. Used when you need to execute couple of actions
+ * each after other one.
+ */
+function sequence() {
+  /**
+   * Append new sequence item.
+   *
+   * @param  aProcessor  [in] object implementing interface
+   *                      {
+   *                        // execute item action
+   *                        process: function() {},
+   *                        // callback, is called when item was processed
+   *                        onProcessed: function() {}
+   *                      };
+   * @param  aEventType  [in] event type of expected event on item action
+   * @param  aTarget     [in] event target of expected event on item action
+   * @param  aItemID     [in] identifier of item
+   */
+  this.append = function sequence_append(
+    aProcessor,
+    aEventType,
+    aTarget,
+    aItemID
+  ) {
+    var item = new sequenceItem(aProcessor, aEventType, aTarget, aItemID);
+    this.items.push(item);
+  };
+
+  /**
+   * Process next sequence item.
+   */
+  this.processNext = function sequence_processNext() {
+    this.idx++;
+    if (this.idx >= this.items.length) {
+      ok(false, "End of sequence: nothing to process!");
+      SimpleTest.finish();
+      return;
+    }
+
+    this.items[this.idx].startProcess();
+  };
+
+  this.items = [];
+  this.idx = -1;
+}
+
+// //////////////////////////////////////////////////////////////////////////////
+// Event queue invokers
+
+/**
+ * Defines a scenario of expected/unexpected events. Each invoker can have
+ * one or more scenarios of events. Only one scenario must be completed.
+ */
+function defineScenario(aInvoker, aEventSeq, aUnexpectedEventSeq) {
+  if (!("scenarios" in aInvoker)) {
+    aInvoker.scenarios = [];
+  }
+
+  // Create unified event sequence concatenating expected and unexpected
+  // events.
+  if (!aEventSeq) {
+    aEventSeq = [];
+  }
+
+  for (var idx = 0; idx < aEventSeq.length; idx++) {
+    aEventSeq[idx].unexpected |= false;
+    aEventSeq[idx].async |= false;
+  }
+
+  if (aUnexpectedEventSeq) {
+    for (var idx = 0; idx < aUnexpectedEventSeq.length; idx++) {
+      aUnexpectedEventSeq[idx].unexpected = true;
+      aUnexpectedEventSeq[idx].async = false;
+    }
+
+    aEventSeq = aEventSeq.concat(aUnexpectedEventSeq);
+  }
+
+  aInvoker.scenarios.push(aEventSeq);
+}
+
+/**
+ * Invokers defined below take a checker object (or array of checker objects).
+ * An invoker listens for default event type registered in event queue object
+ * until its checker is provided.
+ *
+ * Note, checker object or array of checker objects is optional.
+ */
+
+/**
+ * Click invoker.
+ */
+function synthClick(aNodeOrID, aCheckerOrEventSeq, aArgs) {
+  this.__proto__ = new synthAction(aNodeOrID, aCheckerOrEventSeq);
+
+  this.invoke = function synthClick_invoke() {
+    var targetNode = this.DOMNode;
+    if (targetNode.nodeType == targetNode.DOCUMENT_NODE) {
+      targetNode = this.DOMNode.body
+        ? this.DOMNode.body
+        : this.DOMNode.documentElement;
+    }
+
+    // Scroll the node into view, otherwise synth click may fail.
+    if (isHTMLElement(targetNode)) {
+      targetNode.scrollIntoView(true);
+    } else if (isXULElement(targetNode)) {
+      var targetAcc = getAccessible(targetNode);
+      targetAcc.scrollTo(SCROLL_TYPE_ANYWHERE);
+    }
+
+    var x = 1,
+      y = 1;
+    if (aArgs && "where" in aArgs) {
+      if (aArgs.where == "right") {
+        if (isHTMLElement(targetNode)) {
+          x = targetNode.offsetWidth - 1;
+        } else if (isXULElement(targetNode)) {
+          x = targetNode.getBoundingClientRect().width - 1;
+        }
+      } else if (aArgs.where == "center") {
+        if (isHTMLElement(targetNode)) {
+          x = targetNode.offsetWidth / 2;
+          y = targetNode.offsetHeight / 2;
+        } else if (isXULElement(targetNode)) {
+          x = targetNode.getBoundingClientRect().width / 2;
+          y = targetNode.getBoundingClientRect().height / 2;
+        }
+      }
+    }
+    synthesizeMouse(targetNode, x, y, aArgs ? aArgs : {});
+  };
+
+  this.finalCheck = function synthClick_finalCheck() {
+    // Scroll top window back.
+    window.top.scrollTo(0, 0);
+  };
+
+  this.getID = function synthClick_getID() {
+    return prettyName(aNodeOrID) + " click";
+  };
+}
+
+/**
+ * Scrolls the node into view.
+ */
+function scrollIntoView(aNodeOrID, aCheckerOrEventSeq) {
+  this.__proto__ = new synthAction(aNodeOrID, aCheckerOrEventSeq);
+
+  this.invoke = function scrollIntoView_invoke() {
+    var targetNode = this.DOMNode;
+    if (isHTMLElement(targetNode)) {
+      targetNode.scrollIntoView(true);
+    } else if (isXULElement(targetNode)) {
+      var targetAcc = getAccessible(targetNode);
+      targetAcc.scrollTo(SCROLL_TYPE_ANYWHERE);
+    }
+  };
+
+  this.getID = function scrollIntoView_getID() {
+    return prettyName(aNodeOrID) + " scrollIntoView";
+  };
+}
+
+/**
+ * Mouse move invoker.
+ */
+function synthMouseMove(aID, aCheckerOrEventSeq) {
+  this.__proto__ = new synthAction(aID, aCheckerOrEventSeq);
+
+  this.invoke = function synthMouseMove_invoke() {
+    synthesizeMouse(this.DOMNode, 5, 5, { type: "mousemove" });
+    synthesizeMouse(this.DOMNode, 6, 6, { type: "mousemove" });
+  };
+
+  this.getID = function synthMouseMove_getID() {
+    return prettyName(aID) + " mouse move";
+  };
+}
+
+/**
+ * General key press invoker.
+ */
+function synthKey(aNodeOrID, aKey, aArgs, aCheckerOrEventSeq) {
+  this.__proto__ = new synthAction(aNodeOrID, aCheckerOrEventSeq);
+
+  this.invoke = function synthKey_invoke() {
+    synthesizeKey(this.mKey, this.mArgs, this.mWindow);
+  };
+
+  this.getID = function synthKey_getID() {
+    var key = this.mKey;
+    switch (this.mKey) {
+      case "VK_TAB":
+        key = "tab";
+        break;
+      case "VK_DOWN":
+        key = "down";
+        break;
+      case "VK_UP":
+        key = "up";
+        break;
+      case "VK_LEFT":
+        key = "left";
+        break;
+      case "VK_RIGHT":
+        key = "right";
+        break;
+      case "VK_HOME":
+        key = "home";
+        break;
+      case "VK_END":
+        key = "end";
+        break;
+      case "VK_ESCAPE":
+        key = "escape";
+        break;
+      case "VK_RETURN":
+        key = "enter";
+        break;
+    }
+    if (aArgs) {
+      if (aArgs.shiftKey) {
+        key += " shift";
+      }
+      if (aArgs.ctrlKey) {
+        key += " ctrl";
+      }
+      if (aArgs.altKey) {
+        key += " alt";
+      }
+    }
+    return prettyName(aNodeOrID) + " '" + key + " ' key";
+  };
+
+  this.mKey = aKey;
+  this.mArgs = aArgs ? aArgs : {};
+  this.mWindow = aArgs ? aArgs.window : null;
+}
+
+/**
+ * Tab key invoker.
+ */
+function synthTab(aNodeOrID, aCheckerOrEventSeq, aWindow) {
+  this.__proto__ = new synthKey(
+    aNodeOrID,
+    "VK_TAB",
+    { shiftKey: false, window: aWindow },
+    aCheckerOrEventSeq
+  );
+}
+
+/**
+ * Shift tab key invoker.
+ */
+function synthShiftTab(aNodeOrID, aCheckerOrEventSeq) {
+  this.__proto__ = new synthKey(
+    aNodeOrID,
+    "VK_TAB",
+    { shiftKey: true },
+    aCheckerOrEventSeq
+  );
+}
+
+/**
+ * Escape key invoker.
+ */
+function synthEscapeKey(aNodeOrID, aCheckerOrEventSeq) {
+  this.__proto__ = new synthKey(
+    aNodeOrID,
+    "VK_ESCAPE",
+    null,
+    aCheckerOrEventSeq
+  );
+}
+
+/**
+ * Down arrow key invoker.
+ */
+function synthDownKey(aNodeOrID, aCheckerOrEventSeq, aArgs) {
+  this.__proto__ = new synthKey(
+    aNodeOrID,
+    "VK_DOWN",
+    aArgs,
+    aCheckerOrEventSeq
+  );
+}
+
+/**
+ * Up arrow key invoker.
+ */
+function synthUpKey(aNodeOrID, aCheckerOrEventSeq, aArgs) {
+  this.__proto__ = new synthKey(aNodeOrID, "VK_UP", aArgs, aCheckerOrEventSeq);
+}
+
+/**
+ * Left arrow key invoker.
+ */
+function synthLeftKey(aNodeOrID, aCheckerOrEventSeq, aArgs) {
+  this.__proto__ = new synthKey(
+    aNodeOrID,
+    "VK_LEFT",
+    aArgs,
+    aCheckerOrEventSeq
+  );
+}
+
+/**
+ * Right arrow key invoker.
+ */
+function synthRightKey(aNodeOrID, aCheckerOrEventSeq, aArgs) {
+  this.__proto__ = new synthKey(
+    aNodeOrID,
+    "VK_RIGHT",
+    aArgs,
+    aCheckerOrEventSeq
+  );
+}
+
+/**
+ * Home key invoker.
+ */
+function synthHomeKey(aNodeOrID, aCheckerOrEventSeq) {
+  this.__proto__ = new synthKey(aNodeOrID, "VK_HOME", null, aCheckerOrEventSeq);
+}
+
+/**
+ * End key invoker.
+ */
+function synthEndKey(aNodeOrID, aCheckerOrEventSeq) {
+  this.__proto__ = new synthKey(aNodeOrID, "VK_END", null, aCheckerOrEventSeq);
+}
+
+/**
+ * Enter key invoker
+ */
+function synthEnterKey(aID, aCheckerOrEventSeq) {
+  this.__proto__ = new synthKey(aID, "VK_RETURN", null, aCheckerOrEventSeq);
+}
+
+/**
+ * Synth alt + down arrow to open combobox.
+ */
+function synthOpenComboboxKey(aID, aCheckerOrEventSeq) {
+  this.__proto__ = new synthDownKey(aID, aCheckerOrEventSeq, { altKey: true });
+
+  this.getID = function synthOpenComboboxKey_getID() {
+    return "open combobox (alt + down arrow) " + prettyName(aID);
+  };
+}
+
+/**
+ * Focus invoker.
+ */
+function synthFocus(aNodeOrID, aCheckerOrEventSeq) {
+  var checkerOfEventSeq = aCheckerOrEventSeq
+    ? aCheckerOrEventSeq
+    : new focusChecker(aNodeOrID);
+  this.__proto__ = new synthAction(aNodeOrID, checkerOfEventSeq);
+
+  this.invoke = function synthFocus_invoke() {
+    if (this.DOMNode.editor) {
+      this.DOMNode.selectionStart = this.DOMNode.selectionEnd =
+        this.DOMNode.value.length;
+    }
+    this.DOMNode.focus();
+  };
+
+  this.getID = function synthFocus_getID() {
+    return prettyName(aNodeOrID) + " focus";
+  };
+}
+
+/**
+ * Focus invoker. Focus the HTML body of content document of iframe.
+ */
+function synthFocusOnFrame(aNodeOrID, aCheckerOrEventSeq) {
+  var frameDoc = getNode(aNodeOrID).contentDocument;
+  var checkerOrEventSeq = aCheckerOrEventSeq
+    ? aCheckerOrEventSeq
+    : new focusChecker(frameDoc);
+  this.__proto__ = new synthAction(frameDoc, checkerOrEventSeq);
+
+  this.invoke = function synthFocus_invoke() {
+    this.DOMNode.body.focus();
+  };
+
+  this.getID = function synthFocus_getID() {
+    return prettyName(aNodeOrID) + " frame document focus";
+  };
+}
+
+/**
+ * Change the current item when the widget doesn't have a focus.
+ */
+function changeCurrentItem(aID, aItemID) {
+  this.eventSeq = [new nofocusChecker()];
+
+  this.invoke = function changeCurrentItem_invoke() {
+    var controlNode = getNode(aID);
+    var itemNode = getNode(aItemID);
+
+    // HTML
+    if (controlNode.localName == "input") {
+      if (controlNode.checked) {
+        this.reportError();
+      }
+
+      controlNode.checked = true;
+      return;
+    }
+
+    if (controlNode.localName == "select") {
+      if (controlNode.selectedIndex == itemNode.index) {
+        this.reportError();
+      }
+
+      controlNode.selectedIndex = itemNode.index;
+      return;
+    }
+
+    // XUL
+    if (controlNode.localName == "tree") {
+      if (controlNode.currentIndex == aItemID) {
+        this.reportError();
+      }
+
+      controlNode.currentIndex = aItemID;
+      return;
+    }
+
+    if (controlNode.localName == "menulist") {
+      if (controlNode.selectedItem == itemNode) {
+        this.reportError();
+      }
+
+      controlNode.selectedItem = itemNode;
+      return;
+    }
+
+    if (controlNode.currentItem == itemNode) {
+      ok(
+        false,
+        "Error in test: proposed current item is already current" +
+          prettyName(aID)
+      );
+    }
+
+    controlNode.currentItem = itemNode;
+  };
+
+  this.getID = function changeCurrentItem_getID() {
+    return "current item change for " + prettyName(aID);
+  };
+
+  this.reportError = function changeCurrentItem_reportError() {
+    ok(
+      false,
+      "Error in test: proposed current item '" +
+        aItemID +
+        "' is already current"
+    );
+  };
+}
+
+/**
+ * Toggle top menu invoker.
+ */
+function toggleTopMenu(aID, aCheckerOrEventSeq) {
+  this.__proto__ = new synthKey(aID, "VK_ALT", null, aCheckerOrEventSeq);
+
+  this.getID = function toggleTopMenu_getID() {
+    return "toggle top menu on " + prettyName(aID);
+  };
+}
+
+/**
+ * Context menu invoker.
+ */
+function synthContextMenu(aID, aCheckerOrEventSeq) {
+  this.__proto__ = new synthClick(aID, aCheckerOrEventSeq, {
+    button: 0,
+    type: "contextmenu",
+  });
+
+  this.getID = function synthContextMenu_getID() {
+    return "context menu on " + prettyName(aID);
+  };
+}
+
+/**
+ * Open combobox, autocomplete and etc popup, check expandable states.
+ */
+function openCombobox(aComboboxID) {
+  this.eventSeq = [
+    new stateChangeChecker(STATE_EXPANDED, false, true, aComboboxID),
+  ];
+
+  this.invoke = function openCombobox_invoke() {
+    getNode(aComboboxID).focus();
+    synthesizeKey("VK_DOWN", { altKey: true });
+  };
+
+  this.getID = function openCombobox_getID() {
+    return "open combobox " + prettyName(aComboboxID);
+  };
+}
+
+/**
+ * Close combobox, autocomplete and etc popup, check expandable states.
+ */
+function closeCombobox(aComboboxID) {
+  this.eventSeq = [
+    new stateChangeChecker(STATE_EXPANDED, false, false, aComboboxID),
+  ];
+
+  this.invoke = function closeCombobox_invoke() {
+    synthesizeKey("KEY_Escape");
+  };
+
+  this.getID = function closeCombobox_getID() {
+    return "close combobox " + prettyName(aComboboxID);
+  };
+}
+
+/**
+ * Select all invoker.
+ */
+function synthSelectAll(aNodeOrID, aCheckerOrEventSeq) {
+  this.__proto__ = new synthAction(aNodeOrID, aCheckerOrEventSeq);
+
+  this.invoke = function synthSelectAll_invoke() {
+    if (ChromeUtils.getClassName(this.DOMNode) === "HTMLInputElement") {
+      this.DOMNode.select();
+    } else {
+      window.getSelection().selectAllChildren(this.DOMNode);
+    }
+  };
+
+  this.getID = function synthSelectAll_getID() {
+    return aNodeOrID + " selectall";
+  };
+}
+
+/**
+ * Move the caret to the end of line.
+ */
+function moveToLineEnd(aID, aCaretOffset) {
+  if (MAC) {
+    this.__proto__ = new synthKey(
+      aID,
+      "VK_RIGHT",
+      { metaKey: true },
+      new caretMoveChecker(aCaretOffset, true, aID)
+    );
+  } else {
+    this.__proto__ = new synthEndKey(
+      aID,
+      new caretMoveChecker(aCaretOffset, true, aID)
+    );
+  }
+
+  this.getID = function moveToLineEnd_getID() {
+    return "move to line end in " + prettyName(aID);
+  };
+}
+
+/**
+ * Move the caret to the end of previous line if any.
+ */
+function moveToPrevLineEnd(aID, aCaretOffset) {
+  this.__proto__ = new synthAction(
+    aID,
+    new caretMoveChecker(aCaretOffset, true, aID)
+  );
+
+  this.invoke = function moveToPrevLineEnd_invoke() {
+    synthesizeKey("KEY_ArrowUp");
+
+    if (MAC) {
+      synthesizeKey("Key_ArrowRight", { metaKey: true });
+    } else {
+      synthesizeKey("KEY_End");
+    }
+  };
+
+  this.getID = function moveToPrevLineEnd_getID() {
+    return "move to previous line end in " + prettyName(aID);
+  };
+}
+
+/**
+ * Move the caret to begining of the line.
+ */
+function moveToLineStart(aID, aCaretOffset) {
+  if (MAC) {
+    this.__proto__ = new synthKey(
+      aID,
+      "VK_LEFT",
+      { metaKey: true },
+      new caretMoveChecker(aCaretOffset, true, aID)
+    );
+  } else {
+    this.__proto__ = new synthHomeKey(
+      aID,
+      new caretMoveChecker(aCaretOffset, true, aID)
+    );
+  }
+
+  this.getID = function moveToLineEnd_getID() {
+    return "move to line start in " + prettyName(aID);
+  };
+}
+
+/**
+ * Move the caret to begining of the text.
+ */
+function moveToTextStart(aID) {
+  if (MAC) {
+    this.__proto__ = new synthKey(
+      aID,
+      "VK_UP",
+      { metaKey: true },
+      new caretMoveChecker(0, true, aID)
+    );
+  } else {
+    this.__proto__ = new synthKey(
+      aID,
+      "VK_HOME",
+      { ctrlKey: true },
+      new caretMoveChecker(0, true, aID)
+    );
+  }
+
+  this.getID = function moveToTextStart_getID() {
+    return "move to text start in " + prettyName(aID);
+  };
+}
+
+/**
+ * Move the caret in text accessible.
+ */
+function moveCaretToDOMPoint(
+  aID,
+  aDOMPointNodeID,
+  aDOMPointOffset,
+  aExpectedOffset,
+  aFocusTargetID,
+  aCheckFunc
+) {
+  this.target = getAccessible(aID, [nsIAccessibleText]);
+  this.DOMPointNode = getNode(aDOMPointNodeID);
+  this.focus = aFocusTargetID ? getAccessible(aFocusTargetID) : null;
+  this.focusNode = this.focus ? this.focus.DOMNode : null;
+
+  this.invoke = function moveCaretToDOMPoint_invoke() {
+    if (this.focusNode) {
+      this.focusNode.focus();
+    }
+
+    var selection = this.DOMPointNode.ownerGlobal.getSelection();
+    var selRange = selection.getRangeAt(0);
+    selRange.setStart(this.DOMPointNode, aDOMPointOffset);
+    selRange.collapse(true);
+
+    selection.removeRange(selRange);
+    selection.addRange(selRange);
+  };
+
+  this.getID = function moveCaretToDOMPoint_getID() {
+    return (
+      "Set caret on " +
+      prettyName(aID) +
+      " at point: " +
+      prettyName(aDOMPointNodeID) +
+      " node with offset " +
+      aDOMPointOffset
+    );
+  };
+
+  this.finalCheck = function moveCaretToDOMPoint_finalCheck() {
+    if (aCheckFunc) {
+      aCheckFunc.call();
+    }
+  };
+
+  this.eventSeq = [new caretMoveChecker(aExpectedOffset, true, this.target)];
+
+  if (this.focus) {
+    this.eventSeq.push(new asyncInvokerChecker(EVENT_FOCUS, this.focus));
+  }
+}
+
+/**
+ * Set caret offset in text accessible.
+ */
+function setCaretOffset(aID, aOffset, aFocusTargetID) {
+  this.target = getAccessible(aID, [nsIAccessibleText]);
+  this.offset = aOffset == -1 ? this.target.characterCount : aOffset;
+  this.focus = aFocusTargetID ? getAccessible(aFocusTargetID) : null;
+
+  this.invoke = function setCaretOffset_invoke() {
+    this.target.caretOffset = this.offset;
+  };
+
+  this.getID = function setCaretOffset_getID() {
+    return "Set caretOffset on " + prettyName(aID) + " at " + this.offset;
+  };
+
+  this.eventSeq = [new caretMoveChecker(this.offset, true, this.target)];
+
+  if (this.focus) {
+    this.eventSeq.push(new asyncInvokerChecker(EVENT_FOCUS, this.focus));
+  }
+}
+
+// //////////////////////////////////////////////////////////////////////////////
+// Event queue checkers
+
+/**
+ * Common invoker checker (see eventSeq of eventQueue).
+ */
+function invokerChecker(aEventType, aTargetOrFunc, aTargetFuncArg, aIsAsync) {
+  this.type = aEventType;
+  this.async = aIsAsync;
+
+  this.__defineGetter__("target", invokerChecker_targetGetter);
+  this.__defineSetter__("target", invokerChecker_targetSetter);
+
+  // implementation details
+  function invokerChecker_targetGetter() {
+    if (typeof this.mTarget == "function") {
+      return this.mTarget.call(null, this.mTargetFuncArg);
+    }
+    if (typeof this.mTarget == "string") {
+      return getNode(this.mTarget);
+    }
+
+    return this.mTarget;
+  }
+
+  function invokerChecker_targetSetter(aValue) {
+    this.mTarget = aValue;
+    return this.mTarget;
+  }
+
+  this.__defineGetter__("targetDescr", invokerChecker_targetDescrGetter);
+
+  function invokerChecker_targetDescrGetter() {
+    if (typeof this.mTarget == "function") {
+      return this.mTarget.name + ", arg: " + this.mTargetFuncArg;
+    }
+
+    return prettyName(this.mTarget);
+  }
+
+  this.mTarget = aTargetOrFunc;
+  this.mTargetFuncArg = aTargetFuncArg;
+}
+
+/**
+ * event checker that forces preceeding async events to happen before this
+ * checker.
+ */
+function orderChecker() {
+  // XXX it doesn't actually work to inherit from invokerChecker, but maybe we
+  // should fix that?
+  //  this.__proto__ = new invokerChecker(null, null, null, false);
+}
+
+/**
+ * Generic invoker checker for todo events.
+ */
+function todo_invokerChecker(aEventType, aTargetOrFunc, aTargetFuncArg) {
+  this.__proto__ = new invokerChecker(
+    aEventType,
+    aTargetOrFunc,
+    aTargetFuncArg,
+    true
+  );
+  this.todo = true;
+}
+
+/**
+ * Generic invoker checker for unexpected events.
+ */
+function unexpectedInvokerChecker(aEventType, aTargetOrFunc, aTargetFuncArg) {
+  this.__proto__ = new invokerChecker(
+    aEventType,
+    aTargetOrFunc,
+    aTargetFuncArg,
+    true
+  );
+
+  this.unexpected = true;
+}
+
+/**
+ * Common invoker checker for async events.
+ */
+function asyncInvokerChecker(aEventType, aTargetOrFunc, aTargetFuncArg) {
+  this.__proto__ = new invokerChecker(
+    aEventType,
+    aTargetOrFunc,
+    aTargetFuncArg,
+    true
+  );
+}
+
+function focusChecker(aTargetOrFunc, aTargetFuncArg) {
+  this.__proto__ = new invokerChecker(
+    EVENT_FOCUS,
+    aTargetOrFunc,
+    aTargetFuncArg,
+    false
+  );
+
+  this.unique = true; // focus event must be unique for invoker action
+
+  this.check = function focusChecker_check(aEvent) {
+    testStates(aEvent.accessible, STATE_FOCUSED);
+  };
+}
+
+function nofocusChecker(aID) {
+  this.__proto__ = new focusChecker(aID);
+  this.unexpected = true;
+}
+
+/**
+ * Text inserted/removed events checker.
+ * @param aFromUser  [in, optional] kNotFromUserInput or kFromUserInput
+ */
+function textChangeChecker(
+  aID,
+  aStart,
+  aEnd,
+  aTextOrFunc,
+  aIsInserted,
+  aFromUser,
+  aAsync
+) {
+  this.target = getNode(aID);
+  this.type = aIsInserted ? EVENT_TEXT_INSERTED : EVENT_TEXT_REMOVED;
+  this.startOffset = aStart;
+  this.endOffset = aEnd;
+  this.textOrFunc = aTextOrFunc;
+  this.async = aAsync;
+
+  this.match = function stextChangeChecker_match(aEvent) {
+    if (
+      !(aEvent instanceof nsIAccessibleTextChangeEvent) ||
+      aEvent.accessible !== getAccessible(this.target)
+    ) {
+      return false;
+    }
+
+    let tcEvent = aEvent.QueryInterface(nsIAccessibleTextChangeEvent);
+    let modifiedText =
+      typeof this.textOrFunc === "function"
+        ? this.textOrFunc()
+        : this.textOrFunc;
+    return modifiedText === tcEvent.modifiedText;
+  };
+
+  this.check = function textChangeChecker_check(aEvent) {
+    aEvent.QueryInterface(nsIAccessibleTextChangeEvent);
+
+    var modifiedText =
+      typeof this.textOrFunc == "function"
+        ? this.textOrFunc()
+        : this.textOrFunc;
+    var modifiedTextLen =
+      this.endOffset == -1 ? modifiedText.length : aEnd - aStart;
+
+    is(
+      aEvent.start,
+      this.startOffset,
+      "Wrong start offset for " + prettyName(aID)
+    );
+    is(aEvent.length, modifiedTextLen, "Wrong length for " + prettyName(aID));
+    var changeInfo = aIsInserted ? "inserted" : "removed";
+    is(
+      aEvent.isInserted,
+      aIsInserted,
+      "Text was " + changeInfo + " for " + prettyName(aID)
+    );
+    is(
+      aEvent.modifiedText,
+      modifiedText,
+      "Wrong " + changeInfo + " text for " + prettyName(aID)
+    );
+    if (typeof aFromUser != "undefined") {
+      is(
+        aEvent.isFromUserInput,
+        aFromUser,
+        "wrong value of isFromUserInput() for " + prettyName(aID)
+      );
+    }
+  };
+}
+
+/**
+ * Caret move events checker.
+ */
+function caretMoveChecker(
+  aCaretOffset,
+  aIsSelectionCollapsed,
+  aTargetOrFunc,
+  aTargetFuncArg,
+  aIsAsync
+) {
+  this.__proto__ = new invokerChecker(
+    EVENT_TEXT_CARET_MOVED,
+    aTargetOrFunc,
+    aTargetFuncArg,
+    aIsAsync
+  );
+
+  this.check = function caretMoveChecker_check(aEvent) {
+    let evt = aEvent.QueryInterface(nsIAccessibleCaretMoveEvent);
+    is(
+      evt.caretOffset,
+      aCaretOffset,
+      "Wrong caret offset for " + prettyName(aEvent.accessible)
+    );
+    is(
+      evt.isSelectionCollapsed,
+      aIsSelectionCollapsed,
+      "wrong collapsed value for  " + prettyName(aEvent.accessible)
+    );
+  };
+}
+
+function asyncCaretMoveChecker(aCaretOffset, aTargetOrFunc, aTargetFuncArg) {
+  this.__proto__ = new caretMoveChecker(
+    aCaretOffset,
+    true, // Caret is collapsed
+    aTargetOrFunc,
+    aTargetFuncArg,
+    true
+  );
+}
+
+/**
+ * Text selection change checker.
+ */
+function textSelectionChecker(
+  aID,
+  aStartOffset,
+  aEndOffset,
+  aRangeStartContainer,
+  aRangeStartOffset,
+  aRangeEndContainer,
+  aRangeEndOffset
+) {
+  this.__proto__ = new invokerChecker(EVENT_TEXT_SELECTION_CHANGED, aID);
+
+  this.check = function textSelectionChecker_check(aEvent) {
+    if (aStartOffset == aEndOffset) {
+      ok(true, "Collapsed selection triggered text selection change event.");
+    } else {
+      testTextGetSelection(aID, aStartOffset, aEndOffset, 0);
+
+      // Test selection test range
+      let selectionRanges = aEvent.QueryInterface(
+        nsIAccessibleTextSelectionChangeEvent
+      ).selectionRanges;
+      let range = selectionRanges.queryElementAt(0, nsIAccessibleTextRange);
+      is(
+        range.startContainer,
+        getAccessible(aRangeStartContainer),
+        "correct range start container"
+      );
+      is(range.startOffset, aRangeStartOffset, "correct range start offset");
+      is(range.endOffset, aRangeEndOffset, "correct range end offset");
+      is(
+        range.endContainer,
+        getAccessible(aRangeEndContainer),
+        "correct range end container"
+      );
+    }
+  };
+}
+
+/**
+ * Object attribute changed checker
+ */
+function objAttrChangedChecker(aID, aAttr) {
+  this.__proto__ = new invokerChecker(EVENT_OBJECT_ATTRIBUTE_CHANGED, aID);
+
+  this.check = function objAttrChangedChecker_check(aEvent) {
+    var event = null;
+    try {
+      var event = aEvent.QueryInterface(
+        nsIAccessibleObjectAttributeChangedEvent
+      );
+    } catch (e) {
+      ok(false, "Object attribute changed event was expected");
+    }
+
+    if (!event) {
+      return;
+    }
+
+    is(
+      event.changedAttribute,
+      aAttr,
+      "Wrong attribute name of the object attribute changed event."
+    );
+  };
+
+  this.match = function objAttrChangedChecker_match(aEvent) {
+    if (aEvent instanceof nsIAccessibleObjectAttributeChangedEvent) {
+      var scEvent = aEvent.QueryInterface(
+        nsIAccessibleObjectAttributeChangedEvent
+      );
+      return (
+        aEvent.accessible == getAccessible(this.target) &&
+        scEvent.changedAttribute == aAttr
+      );
+    }
+    return false;
+  };
+}
+
+/**
+ * State change checker.
+ */
+function stateChangeChecker(
+  aState,
+  aIsExtraState,
+  aIsEnabled,
+  aTargetOrFunc,
+  aTargetFuncArg,
+  aIsAsync,
+  aSkipCurrentStateCheck
+) {
+  this.__proto__ = new invokerChecker(
+    EVENT_STATE_CHANGE,
+    aTargetOrFunc,
+    aTargetFuncArg,
+    aIsAsync
+  );
+
+  this.check = function stateChangeChecker_check(aEvent) {
+    var event = null;
+    try {
+      var event = aEvent.QueryInterface(nsIAccessibleStateChangeEvent);
+    } catch (e) {
+      ok(false, "State change event was expected");
+    }
+
+    if (!event) {
+      return;
+    }
+
+    is(
+      event.isExtraState,
+      aIsExtraState,
+      "Wrong extra state bit of the statechange event."
+    );
+    isState(
+      event.state,
+      aState,
+      aIsExtraState,
+      "Wrong state of the statechange event."
+    );
+    is(event.isEnabled, aIsEnabled, "Wrong state of statechange event state");
+
+    if (aSkipCurrentStateCheck) {
+      todo(false, "State checking was skipped!");
+      return;
+    }
+
+    var state = aIsEnabled ? (aIsExtraState ? 0 : aState) : 0;
+    var extraState = aIsEnabled ? (aIsExtraState ? aState : 0) : 0;
+    var unxpdState = aIsEnabled ? 0 : aIsExtraState ? 0 : aState;
+    var unxpdExtraState = aIsEnabled ? 0 : aIsExtraState ? aState : 0;
+    testStates(
+      event.accessible,
+      state,
+      extraState,
+      unxpdState,
+      unxpdExtraState
+    );
+  };
+
+  this.match = function stateChangeChecker_match(aEvent) {
+    if (aEvent instanceof nsIAccessibleStateChangeEvent) {
+      var scEvent = aEvent.QueryInterface(nsIAccessibleStateChangeEvent);
+      return (
+        aEvent.accessible == getAccessible(this.target) &&
+        scEvent.state == aState
+      );
+    }
+    return false;
+  };
+}
+
+function asyncStateChangeChecker(
+  aState,
+  aIsExtraState,
+  aIsEnabled,
+  aTargetOrFunc,
+  aTargetFuncArg
+) {
+  this.__proto__ = new stateChangeChecker(
+    aState,
+    aIsExtraState,
+    aIsEnabled,
+    aTargetOrFunc,
+    aTargetFuncArg,
+    true
+  );
+}
+
+/**
+ * Expanded state change checker.
+ */
+function expandedStateChecker(aIsEnabled, aTargetOrFunc, aTargetFuncArg) {
+  this.__proto__ = new invokerChecker(
+    EVENT_STATE_CHANGE,
+    aTargetOrFunc,
+    aTargetFuncArg
+  );
+
+  this.check = function expandedStateChecker_check(aEvent) {
+    var event = null;
+    try {
+      var event = aEvent.QueryInterface(nsIAccessibleStateChangeEvent);
+    } catch (e) {
+      ok(false, "State change event was expected");
+    }
+
+    if (!event) {
+      return;
+    }
+
+    is(event.state, STATE_EXPANDED, "Wrong state of the statechange event.");
+    is(
+      event.isExtraState,
+      false,
+      "Wrong extra state bit of the statechange event."
+    );
+    is(event.isEnabled, aIsEnabled, "Wrong state of statechange event state");
+
+    testStates(event.accessible, aIsEnabled ? STATE_EXPANDED : STATE_COLLAPSED);
+  };
+}
+
+// //////////////////////////////////////////////////////////////////////////////
+// Event sequances (array of predefined checkers)
+
+/**
+ * Event seq for single selection change.
+ */
+function selChangeSeq(aUnselectedID, aSelectedID) {
+  if (!aUnselectedID) {
+    return [
+      new stateChangeChecker(STATE_SELECTED, false, true, aSelectedID),
+      new invokerChecker(EVENT_SELECTION, aSelectedID),
+    ];
+  }
+
+  // Return two possible scenarios: depending on widget type when selection is
+  // moved the the order of items that get selected and unselected may vary.
+  return [
+    [
+      new stateChangeChecker(STATE_SELECTED, false, false, aUnselectedID),
+      new stateChangeChecker(STATE_SELECTED, false, true, aSelectedID),
+      new invokerChecker(EVENT_SELECTION, aSelectedID),
+    ],
+    [
+      new stateChangeChecker(STATE_SELECTED, false, true, aSelectedID),
+      new stateChangeChecker(STATE_SELECTED, false, false, aUnselectedID),
+      new invokerChecker(EVENT_SELECTION, aSelectedID),
+    ],
+  ];
+}
+
+/**
+ * Event seq for item removed form the selection.
+ */
+function selRemoveSeq(aUnselectedID) {
+  return [
+    new stateChangeChecker(STATE_SELECTED, false, false, aUnselectedID),
+    new invokerChecker(EVENT_SELECTION_REMOVE, aUnselectedID),
+  ];
+}
+
+/**
+ * Event seq for item added to the selection.
+ */
+function selAddSeq(aSelectedID) {
+  return [
+    new stateChangeChecker(STATE_SELECTED, false, true, aSelectedID),
+    new invokerChecker(EVENT_SELECTION_ADD, aSelectedID),
+  ];
+}
+
+// //////////////////////////////////////////////////////////////////////////////
+// Private implementation details.
+// //////////////////////////////////////////////////////////////////////////////
+
+// //////////////////////////////////////////////////////////////////////////////
+// General
+
+var gA11yEventListeners = {};
+var gA11yEventApplicantsCount = 0;
+
+var gA11yEventObserver = {
+  // eslint-disable-next-line complexity
+  observe: function observe(aSubject, aTopic, aData) {
+    if (aTopic != "accessible-event") {
+      return;
+    }
+
+    var event;
+    try {
+      event = aSubject.QueryInterface(nsIAccessibleEvent);
+    } catch (ex) {
+      // After a test is aborted (i.e. timed out by the harness), this exception is soon triggered.
+      // Remove the leftover observer, otherwise it "leaks" to all the following tests.
+      Services.obs.removeObserver(this, "accessible-event");
+      // Forward the exception, with added explanation.
+      throw new Error(
+        "[accessible/events.js, gA11yEventObserver.observe] This is expected " +
+          `if a previous test has been aborted... Initial exception was: [ ${ex} ]`
+      );
+    }
+    var listenersArray = gA11yEventListeners[event.eventType];
+
+    var eventFromDumpArea = false;
+    if (gLogger.isEnabled()) {
+      // debug stuff
+      eventFromDumpArea = true;
+
+      var target = event.DOMNode;
+      var dumpElm = gA11yEventDumpID
+        ? document.getElementById(gA11yEventDumpID)
+        : null;
+
+      if (dumpElm) {
+        var parent = target;
+        while (parent && parent != dumpElm) {
+          parent = parent.parentNode;
+        }
+      }
+
+      if (!dumpElm || parent != dumpElm) {
+        var type = eventTypeToString(event.eventType);
+        var info = "Event type: " + type;
+
+        if (event instanceof nsIAccessibleStateChangeEvent) {
+          var stateStr = statesToString(
+            event.isExtraState ? 0 : event.state,
+            event.isExtraState ? event.state : 0
+          );
+          info += ", state: " + stateStr + ", is enabled: " + event.isEnabled;
+        } else if (event instanceof nsIAccessibleTextChangeEvent) {
+          info +=
+            ", start: " +
+            event.start +
+            ", length: " +
+            event.length +
+            ", " +
+            (event.isInserted ? "inserted" : "removed") +
+            " text: " +
+            event.modifiedText;
+        }
+
+        info += ". Target: " + prettyName(event.accessible);
+
+        if (listenersArray) {
+          info += ". Listeners count: " + listenersArray.length;
+        }
+
+        if (gLogger.hasFeature("parentchain:" + type)) {
+          info += "\nParent chain:\n";
+          var acc = event.accessible;
+          while (acc) {
+            info += "  " + prettyName(acc) + "\n";
+            acc = acc.parent;
+          }
+        }
+
+        eventFromDumpArea = false;
+        gLogger.log(info);
+      }
+    }
+
+    // Do not notify listeners if event is result of event log changes.
+    if (!listenersArray || eventFromDumpArea) {
+      return;
+    }
+
+    for (var index = 0; index < listenersArray.length; index++) {
+      listenersArray[index].handleEvent(event);
+    }
+  },
+};
+
+function listenA11yEvents(aStartToListen) {
+  if (aStartToListen) {
+    // Add observer when adding the first applicant only.
+    if (!gA11yEventApplicantsCount++) {
+      Services.obs.addObserver(gA11yEventObserver, "accessible-event");
+    }
+  } else {
+    // Remove observer when there are no more applicants only.
+    // '< 0' case should not happen, but just in case: removeObserver() will throw.
+    // eslint-disable-next-line no-lonely-if
+    if (--gA11yEventApplicantsCount <= 0) {
+      Services.obs.removeObserver(gA11yEventObserver, "accessible-event");
+    }
+  }
+}
+
+function addA11yEventListener(aEventType, aEventHandler) {
+  if (!(aEventType in gA11yEventListeners)) {
+    gA11yEventListeners[aEventType] = [];
+  }
+
+  var listenersArray = gA11yEventListeners[aEventType];
+  var index = listenersArray.indexOf(aEventHandler);
+  if (index == -1) {
+    listenersArray.push(aEventHandler);
+  }
+}
+
+function removeA11yEventListener(aEventType, aEventHandler) {
+  var listenersArray = gA11yEventListeners[aEventType];
+  if (!listenersArray) {
+    return false;
+  }
+
+  var index = listenersArray.indexOf(aEventHandler);
+  if (index == -1) {
+    return false;
+  }
+
+  listenersArray.splice(index, 1);
+
+  if (!listenersArray.length) {
+    gA11yEventListeners[aEventType] = null;
+    delete gA11yEventListeners[aEventType];
+  }
+
+  return true;
+}
+
+/**
+ * Used to dump debug information.
+ */
+var gLogger = {
+  /**
+   * Return true if dump is enabled.
+   */
+  isEnabled: function debugOutput_isEnabled() {
+    return (
+      gA11yEventDumpID || gA11yEventDumpToConsole || gA11yEventDumpToAppConsole
+    );
+  },
+
+  /**
+   * Dump information into DOM and console if applicable.
+   */
+  log: function logger_log(aMsg) {
+    this.logToConsole(aMsg);
+    this.logToAppConsole(aMsg);
+    this.logToDOM(aMsg);
+  },
+
+  /**
+   * Log message to DOM.
+   *
+   * @param aMsg          [in] the primary message
+   * @param aHasIndent    [in, optional] if specified the message has an indent
+   * @param aPreEmphText  [in, optional] the text is colored and appended prior
+   *                        primary message
+   */
+  logToDOM: function logger_logToDOM(aMsg, aHasIndent, aPreEmphText) {
+    if (gA11yEventDumpID == "") {
+      return;
+    }
+
+    var dumpElm = document.getElementById(gA11yEventDumpID);
+    if (!dumpElm) {
+      ok(
+        false,
+        "No dump element '" + gA11yEventDumpID + "' within the document!"
+      );
+      return;
+    }
+
+    var containerTagName =
+      ChromeUtils.getClassName(document) == "HTMLDocument"
+        ? "div"
+        : "description";
+
+    var container = document.createElement(containerTagName);
+    if (aHasIndent) {
+      container.setAttribute("style", "padding-left: 10px;");
+    }
+
+    if (aPreEmphText) {
+      var inlineTagName =
+        ChromeUtils.getClassName(document) == "HTMLDocument"
+          ? "span"
+          : "description";
+      var emphElm = document.createElement(inlineTagName);
+      emphElm.setAttribute("style", "color: blue;");
+      emphElm.textContent = aPreEmphText;
+
+      container.appendChild(emphElm);
+    }
+
+    var textNode = document.createTextNode(aMsg);
+    container.appendChild(textNode);
+
+    dumpElm.appendChild(container);
+  },
+
+  /**
+   * Log message to console.
+   */
+  logToConsole: function logger_logToConsole(aMsg) {
+    if (gA11yEventDumpToConsole) {
+      dump("\n" + aMsg + "\n");
+    }
+  },
+
+  /**
+   * Log message to error console.
+   */
+  logToAppConsole: function logger_logToAppConsole(aMsg) {
+    if (gA11yEventDumpToAppConsole) {
+      Services.console.logStringMessage("events: " + aMsg);
+    }
+  },
+
+  /**
+   * Return true if logging feature is enabled.
+   */
+  hasFeature: function logger_hasFeature(aFeature) {
+    var startIdx = gA11yEventDumpFeature.indexOf(aFeature);
+    if (startIdx == -1) {
+      return false;
+    }
+
+    var endIdx = startIdx + aFeature.length;
+    return (
+      endIdx == gA11yEventDumpFeature.length ||
+      gA11yEventDumpFeature[endIdx] == ";"
+    );
+  },
+};
+
+// //////////////////////////////////////////////////////////////////////////////
+// Sequence
+
+/**
+ * Base class of sequence item.
+ */
+function sequenceItem(aProcessor, aEventType, aTarget, aItemID) {
+  // private
+
+  this.startProcess = function sequenceItem_startProcess() {
+    this.queue.invoke();
+  };
+
+  this.queue = new eventQueue();
+  this.queue.onFinish = function () {
+    aProcessor.onProcessed();
+    return DO_NOT_FINISH_TEST;
+  };
+
+  var invoker = {
+    invoke: function invoker_invoke() {
+      return aProcessor.process();
+    },
+    getID: function invoker_getID() {
+      return aItemID;
+    },
+    eventSeq: [new invokerChecker(aEventType, aTarget)],
+  };
+
+  this.queue.push(invoker);
+}
+
+// //////////////////////////////////////////////////////////////////////////////
+// Event queue invokers
+
+/**
+ * Invoker base class for prepare an action.
+ */
+function synthAction(aNodeOrID, aEventsObj) {
+  this.DOMNode = getNode(aNodeOrID);
+
+  if (aEventsObj) {
+    var scenarios = null;
+    if (aEventsObj instanceof Array) {
+      if (aEventsObj[0] instanceof Array) {
+        scenarios = aEventsObj;
+      }
+      // scenarios
+      else {
+        scenarios = [aEventsObj];
+      } // event sequance
+    } else {
+      scenarios = [[aEventsObj]]; // a single checker object
+    }
+
+    for (var i = 0; i < scenarios.length; i++) {
+      defineScenario(this, scenarios[i]);
+    }
+  }
+
+  this.getID = function synthAction_getID() {
+    return prettyName(aNodeOrID) + " action";
+  };
+}
diff --git a/accessible/tests/mochitest/events/a11y.ini b/accessible/tests/mochitest/events/a11y.ini
new file mode 100644
index 0000000000..40ef776175
--- /dev/null
+++ b/accessible/tests/mochitest/events/a11y.ini
@@ -0,0 +1,68 @@
+[DEFAULT]
+support-files =
+  focus.html
+  scroll.html
+  slow_image.sjs
+  !/accessible/tests/mochitest/*.js
+  !/accessible/tests/mochitest/letters.gif
+  !/image/test/mochitest/animated-gif-finalframe.gif
+  !/image/test/mochitest/animated-gif.gif
+
+[test_announcement.html]
+[test_aria_alert.html]
+[test_aria_menu.html]
+[test_aria_objattr.html]
+[test_aria_owns.html]
+[test_aria_statechange.html]
+[test_attrs.html]
+[test_attrchange.html]
+[test_bug1322593.html]
+[test_bug1322593-2.html]
+[test_caretmove.html]
+[test_coalescence.html]
+[test_contextmenu.html]
+[test_descrchange.html]
+[test_dragndrop.html]
+[test_flush.html]
+[test_focusable_statechange.html]
+[test_focus_aria_activedescendant.html]
+[test_focus_autocomplete.html]
+[test_focus_autocomplete.xhtml]
+# Disabled on Linux and Windows due to frequent failures - bug 695019, bug 890795
+skip-if = os == 'win' || os == 'linux'
+[test_focus_canvas.html]
+[test_focus_contextmenu.xhtml]
+[test_focus_controls.html]
+[test_focus_doc.html]
+[test_focus_general.html]
+[test_focus_general.xhtml]
+[test_focus_listcontrols.xhtml]
+[test_focus_menu.xhtml]
+[test_focus_name.html]
+[test_focus_removal.html]
+[test_focus_selects.html]
+[test_focus_tabbox.xhtml]
+skip-if = true
+[test_focus_tree.xhtml]
+[test_fromUserInput.html]
+[test_label.xhtml]
+[test_menu.xhtml]
+[test_mutation.html]
+[test_namechange.xhtml]
+[test_namechange.html]
+[test_scroll.xhtml]
+[test_scroll_caret.xhtml]
+[test_selection.html]
+skip-if = os == 'mac'
+[test_selection.xhtml]
+skip-if = os == 'mac'
+[test_selection_aria.html]
+[test_statechange.html]
+[test_statechange.xhtml]
+[test_text.html]
+[test_text_alg.html]
+[test_textattrchange.html]
+[test_textselchange.html]
+[test_tree.xhtml]
+[test_valuechange.html]
+skip-if = os == 'mac'
diff --git a/accessible/tests/mochitest/events/docload/a11y.ini b/accessible/tests/mochitest/events/docload/a11y.ini
new file mode 100644
index 0000000000..6e014d511c
--- /dev/null
+++ b/accessible/tests/mochitest/events/docload/a11y.ini
@@ -0,0 +1,13 @@
+[DEFAULT]
+support-files =
+  docload_wnd.html
+  !/accessible/tests/mochitest/*.js
+
+[test_docload_aria.html]
+[test_docload_busy.html]
+[test_docload_embedded.html]
+[test_docload_iframe.html]
+[test_docload_root.html]
+skip-if = os == 'mac' # bug 1456997
+[test_docload_shutdown.html]
+skip-if = os == 'mac' # bug 1456997
diff --git a/accessible/tests/mochitest/events/docload/docload_wnd.html b/accessible/tests/mochitest/events/docload/docload_wnd.html
new file mode 100644
index 0000000000..93df1e86d4
--- /dev/null
+++ b/accessible/tests/mochitest/events/docload/docload_wnd.html
@@ -0,0 +1,37 @@
+<html>
+<head>
+  <title>Accessible events testing for document</title>
+  <script>
+    const STATE_BUSY = Ci.nsIAccessibleStates.STATE_BUSY;
+
+    var gService = null;
+    function waitForDocLoad() {
+      if (!gService) {
+        gService = Cc["@mozilla.org/accessibilityService;1"].
+         getService(Ci.nsIAccessibilityService);
+      }
+
+      var accDoc = gService.getAccessibleFor(document);
+
+      var state = {};
+      accDoc.getState(state, {});
+      if (state.value & STATE_BUSY) {
+        window.setTimeout(waitForDocLoad, 0);
+        return;
+      }
+
+      hideIFrame();
+    }
+
+    function hideIFrame() {
+      var iframe = document.getElementById("iframe");
+      gService.getAccessibleFor(iframe.contentDocument);
+      iframe.style.display = "none";
+    }
+  </script>
+</head>
+
+<body onload="waitForDocLoad();">
+  <iframe id="iframe"></iframe>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/docload/test_docload_aria.html b/accessible/tests/mochitest/events/docload/test_docload_aria.html
new file mode 100644
index 0000000000..c5fc099918
--- /dev/null
+++ b/accessible/tests/mochitest/events/docload/test_docload_aria.html
@@ -0,0 +1,75 @@
+<html>
+
+<head>
+  <title>Accessible events testing for ARIA document</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../../common.js"></script>
+  <script type="application/javascript"
+          src="../../role.js"></script>
+  <script type="application/javascript"
+          src="../../states.js"></script>
+  <script type="application/javascript"
+          src="../../events.js"></script>
+
+  <script type="application/javascript">
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    function showARIADialog(aID) {
+      this.dialogNode = getNode(aID);
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_DOCUMENT_LOAD_COMPLETE, this.dialogNode),
+      ];
+
+      this.invoke = function showARIADialog_invoke() {
+        this.dialogNode.style.display = "block";
+      };
+
+      this.getID = function showARIADialog_getID() {
+        return "show ARIA dialog";
+      };
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    var gQueue = null;
+
+    function doTests() {
+      gQueue = new eventQueue();
+
+      gQueue.push(new showARIADialog("dialog"));
+      gQueue.push(new showARIADialog("document"));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=759833"
+     title="ARIA documents should fire document loading events">
+    Mozilla Bug 759833
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div role="dialog" id="dialog" style="display: none;">It's a dialog</div>
+  <div role="document" id="document" style="display: none;">It's a document</div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/docload/test_docload_busy.html b/accessible/tests/mochitest/events/docload/test_docload_busy.html
new file mode 100644
index 0000000000..37caf306bb
--- /dev/null
+++ b/accessible/tests/mochitest/events/docload/test_docload_busy.html
@@ -0,0 +1,83 @@
+<html>
+
+<head>
+  <title>Accessible events testing for document</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../../common.js"></script>
+  <script type="application/javascript"
+          src="../../role.js"></script>
+  <script type="application/javascript"
+          src="../../states.js"></script>
+  <script type="application/javascript"
+          src="../../events.js"></script>
+
+  <script type="application/javascript">
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    function makeIFrameVisible(aID) {
+      this.DOMNode = getNode(aID);
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_REORDER, this.DOMNode.parentNode),
+        {
+          type: EVENT_STATE_CHANGE,
+          get target() {
+            return getAccessible("iframe").firstChild;
+          },
+          match(aEvent) {
+            // The document shouldn't have busy state (the DOM document was
+            // loaded before its accessible was created). Do this test lately to
+            // make sure the content of document accessible was created
+            // initially, prior to this the document accessible keeps busy
+            // state. The initial creation happens asynchronously after document
+            // creation, there are no events we could use to catch it.
+            let { state, isEnabled } = aEvent.QueryInterface(nsIAccessibleStateChangeEvent);
+            return state & STATE_BUSY && !isEnabled;
+          },
+        },
+      ];
+
+      this.invoke = () => (this.DOMNode.style.visibility = "visible");
+
+      this.getID = () =>
+        "The accessible for DOM document loaded before it's shown shouldn't have busy state.";
+    }
+
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    function doTests() {
+      const gQueue = new eventQueue();
+      gQueue.push(new makeIFrameVisible("iframe"));
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=658185"
+     title="The DOM document loaded before it's shown shouldn't have busy state">
+    Mozilla Bug 658185
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div id="testContainer"><iframe id="iframe" src="about:mozilla" style="visibility: hidden;"></iframe></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/docload/test_docload_embedded.html b/accessible/tests/mochitest/events/docload/test_docload_embedded.html
new file mode 100644
index 0000000000..18873dc904
--- /dev/null
+++ b/accessible/tests/mochitest/events/docload/test_docload_embedded.html
@@ -0,0 +1,85 @@
+<html>
+
+<head>
+  <title>Accessible events testing for document</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../../common.js"></script>
+  <script type="application/javascript"
+          src="../../role.js"></script>
+  <script type="application/javascript"
+          src="../../events.js"></script>
+
+  <script type="application/javascript">
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    function changeIframeSrc(aIdentifier, aURL, aTitle) {
+      this.DOMNode = getNode(aIdentifier);
+
+      function getIframeDoc() {
+        return getAccessible(getNode(aIdentifier).contentDocument);
+      }
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_REORDER, getAccessible(this.DOMNode)),
+        new asyncInvokerChecker(EVENT_DOCUMENT_LOAD_COMPLETE, getIframeDoc),
+      ];
+
+      this.invoke = () => (this.DOMNode.src = aURL);
+
+      this.finalCheck = () =>
+        testAccessibleTree(this.DOMNode, {
+          role: ROLE_INTERNAL_FRAME,
+          children: [
+            {
+              role: ROLE_DOCUMENT,
+              name: aTitle,
+            },
+          ],
+        });
+
+      this.getID = () => `change iframe src on ${aURL}`;
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    function doTests() {
+      const gQueue = new eventQueue();
+      gQueue.push(new changeIframeSrc("iframe", "about:license", "Licenses"));
+      gQueue.push(new changeIframeSrc("iframe", "about:buildconfig", "Build Configuration"));
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=420845"
+     title="Fire event_reorder on any embedded frames/iframes whos document has just loaded">
+    Mozilla Bug 420845
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=754165"
+     title="Fire document load events on iframes too">
+    Mozilla Bug 754165
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div id="testContainer"><iframe id="iframe"></iframe></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/docload/test_docload_iframe.html b/accessible/tests/mochitest/events/docload/test_docload_iframe.html
new file mode 100644
index 0000000000..d410ebb7e2
--- /dev/null
+++ b/accessible/tests/mochitest/events/docload/test_docload_iframe.html
@@ -0,0 +1,99 @@
+<html>
+
+<head>
+  <title>Accessible events testing for document</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../../common.js"></script>
+  <script type="application/javascript"
+          src="../../role.js"></script>
+  <script type="application/javascript"
+          src="../../states.js"></script>
+  <script type="application/javascript"
+          src="../../events.js"></script>
+
+  <script type="application/javascript">
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    const kHide = 1;
+    const kShow = 2;
+    const kRemove = 3;
+
+    function morphIFrame(aIdentifier, aAction) {
+      this.DOMNode = getNode(aIdentifier);
+      this.IFrameContainerDOMNode = this.DOMNode.parentNode;
+
+      this.eventSeq = [
+        new invokerChecker(aAction === kShow ? EVENT_SHOW : EVENT_HIDE, this.DOMNode),
+        new invokerChecker(EVENT_REORDER, this.IFrameContainerDOMNode),
+      ];
+
+      this.invoke = () => {
+        if (aAction === kRemove) {
+          this.IFrameContainerDOMNode.removeChild(this.DOMNode);
+        } else {
+          this.DOMNode.style.display = aAction === kHide ? "none" : "block";
+        }
+      };
+
+      this.finalCheck = () =>
+        testAccessibleTree(this.IFrameContainerDOMNode, {
+          role: ROLE_SECTION,
+          children: (aAction == kHide || aAction == kRemove) ? [ ] :
+            [
+              {
+                role: ROLE_INTERNAL_FRAME,
+                children: [
+                  { role: ROLE_DOCUMENT },
+                ],
+              },
+            ],
+        });
+
+      this.getID = () => {
+        if (aAction === kRemove) {
+          return "remove iframe";
+        }
+
+        return `change display style of iframe to ${aAction === kHide ? "none" : "block"}`;
+      };
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    function doTests() {
+      const gQueue = new eventQueue(EVENT_REORDER);
+      gQueue.push(new morphIFrame("iframe", kHide));
+      gQueue.push(new morphIFrame("iframe", kShow));
+      gQueue.push(new morphIFrame("iframe", kRemove));
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=566103"
+     title="Reorganize accessible document handling">
+    Mozilla Bug 566103
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div id="testContainer"><iframe id="iframe"></iframe></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/docload/test_docload_root.html b/accessible/tests/mochitest/events/docload/test_docload_root.html
new file mode 100644
index 0000000000..91ce3a10ee
--- /dev/null
+++ b/accessible/tests/mochitest/events/docload/test_docload_root.html
@@ -0,0 +1,125 @@
+<html>
+
+<head>
+  <title>Accessible events testing for document</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../../common.js"></script>
+  <script type="application/javascript"
+          src="../../role.js"></script>
+  <script type="application/javascript"
+          src="../../events.js"></script>
+
+  <script type="application/javascript">
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    let gDialog;
+    let gDialogDoc;
+    let gRootAcc;
+
+    function openDialogWnd(aURL) {
+      // Get application root accessible.
+      let docAcc = getAccessible(document);
+      while (docAcc) {
+        gRootAcc = docAcc;
+        try {
+          docAcc = docAcc.parent;
+        } catch (e) {
+          ok(false, `Can't get parent for ${prettyName(docAcc)}`);
+          throw e;
+        }
+      }
+
+      this.eventSeq = [
+        new asyncInvokerChecker(EVENT_REORDER, gRootAcc),
+        // We use a function here to get the target because gDialog isn't set
+        // yet, but it will be when the function is called.
+        new invokerChecker(EVENT_FOCUS, () => gDialog.document)
+      ];
+
+      this.invoke = () => (gDialog = window.browsingContext.topChromeWindow.openDialog(aURL));
+
+      this.finalCheck = () => {
+        const accTree = {
+          role: ROLE_APP_ROOT,
+          children: [
+            {
+              role: ROLE_CHROME_WINDOW,
+            },
+            {
+              role: ROLE_CHROME_WINDOW,
+            },
+          ],
+        };
+
+        testAccessibleTree(gRootAcc, accTree);
+
+        gDialogDoc = gDialog.document;
+        ok(isAccessibleInCache(gDialogDoc),
+          `The document accessible for '${aURL}' is not in cache!`);
+      };
+
+      this.getID = () => `open dialog '${aURL}'`;
+    }
+
+    function closeDialogWnd() {
+      this.eventSeq = [ new invokerChecker(EVENT_FOCUS, getAccessible(document)) ];
+
+      this.invoke = () => {
+        gDialog.close();
+        window.focus();
+      };
+
+      this.finalCheck = () => {
+        ok(!isAccessibleInCache(gDialogDoc),
+          `The document accessible for dialog is in cache still!`);
+
+        gDialog = gDialogDoc = gRootAcc = null;
+      };
+
+      this.getID = () => "close dialog";
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    function doTests() {
+      // Front end stuff sometimes likes to stuff things in the hidden window(s)
+      // in which case we should repress all accessibles for those.
+
+      // Try to create an accessible for the hidden window's document.
+      let doc = Services.appShell.hiddenDOMWindow.document;
+      let hiddenDocAcc = gAccService.getAccessibleFor(doc);
+      ok(!hiddenDocAcc, "hiddenDOMWindow should not have an accessible.");
+
+      const gQueue = new eventQueue();
+      gQueue.push(new openDialogWnd("about:about"));
+      gQueue.push(new closeDialogWnd());
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=506206"
+     title="Fire event_reorder application root accessible">
+    Mozilla Bug 506206
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/docload/test_docload_shutdown.html b/accessible/tests/mochitest/events/docload/test_docload_shutdown.html
new file mode 100644
index 0000000000..a111d9e43b
--- /dev/null
+++ b/accessible/tests/mochitest/events/docload/test_docload_shutdown.html
@@ -0,0 +1,142 @@
+<html>
+
+<head>
+  <title>Accessible events testing for document</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../../common.js"></script>
+  <script type="application/javascript"
+          src="../../role.js"></script>
+  <script type="application/javascript"
+          src="../../events.js"></script>
+
+  <script type="application/javascript">
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    let gDialog;
+    let gDialogDoc;
+    let gRootAcc;
+    let gIframeDoc;
+
+    function openWndShutdownDoc(aURL) {
+      // Get application root accessible.
+      let docAcc = getAccessible(document);
+      while (docAcc) {
+        gRootAcc = docAcc;
+        try {
+          docAcc = docAcc.parent;
+        } catch (e) {
+          ok(false, `Can't get parent for ${prettyName(docAcc)}`);
+          throw e;
+        }
+      }
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_REORDER, gRootAcc),
+        {
+          type: EVENT_HIDE,
+          get target() {
+            gDialogDoc = gDialog.document;
+            const iframe = gDialogDoc.getElementById("iframe");
+            gIframeDoc = iframe.contentDocument;
+            return iframe;
+          },
+          get targetDescr() {
+            return "inner iframe of docload_wnd.html document";
+          },
+        },
+      ];
+
+
+      this.invoke = () => gDialog = window.browsingContext.topChromeWindow.openDialog(aURL);
+
+      this.finalCheck = () => {
+        const accTree = {
+          role: ROLE_APP_ROOT,
+          children: [
+            {
+              role: ROLE_CHROME_WINDOW,
+            },
+            {
+              role: ROLE_CHROME_WINDOW,
+            },
+          ],
+        };
+
+        testAccessibleTree(gRootAcc, accTree);
+        // After timeout after event hide for iframe was handled the document
+        // accessible for iframe's document should no longer be in cache.
+        ok(!isAccessibleInCache(gIframeDoc),
+          "The document accessible for iframe is in cache still after iframe hide!");
+        ok(isAccessibleInCache(gDialogDoc),
+          `The document accessible for '${aURL}' is not in cache!`);
+      };
+
+      this.getID = () => `open dialog '${aURL}'`;
+    }
+
+    function closeWndShutdownDoc() {
+      this.eventSeq = [ new invokerChecker(EVENT_FOCUS, getAccessible(document)) ];
+
+      this.invoke = () => {
+        gDialog.close();
+        window.focus();
+      };
+
+      this.finalCheck = () => {
+        ok(!isAccessibleInCache(gDialogDoc),
+          "The document accessible for dialog is in cache still!");
+        // After the window is closed all alive subdocument accessibles should
+        // be shut down.
+        ok(!isAccessibleInCache(gIframeDoc),
+          "The document accessible for iframe is in cache still!");
+
+        gDialog = gDialogDoc = gRootAcc = gIframeDoc = null;
+      };
+
+      this.getID = () => "close dialog";
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    function doTests() {
+      // Front end stuff sometimes likes to stuff things in the hidden window(s)
+      // in which case we should repress all accessibles for those.
+
+      // Try to create an accessible for the hidden window's document.
+      let doc = Services.appShell.hiddenDOMWindow.document;
+      let hiddenDocAcc = gAccService.getAccessibleFor(doc);
+      ok(!hiddenDocAcc, "hiddenDOMWindow should not have an accessible.");
+
+      const gQueue = new eventQueue();
+      gQueue.push(new openWndShutdownDoc("../../events/docload/docload_wnd.html"));
+      gQueue.push(new closeWndShutdownDoc());
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=571459"
+     title="Shutdown document accessible when presshell goes away">
+    Mozilla Bug 571459
+   </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/focus.html b/accessible/tests/mochitest/events/focus.html
new file mode 100644
index 0000000000..ab055df82c
--- /dev/null
+++ b/accessible/tests/mochitest/events/focus.html
@@ -0,0 +1,10 @@
+<html>
+
+<head>
+  <title>editable document</title>
+</head>
+
+<body contentEditable="true">
+  editable document
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/scroll.html b/accessible/tests/mochitest/events/scroll.html
new file mode 100644
index 0000000000..562e0a3825
--- /dev/null
+++ b/accessible/tests/mochitest/events/scroll.html
@@ -0,0 +1,181 @@
+<html>
+
+<head>
+  <title>nsIAccessible actions testing for anchors</title>
+</head>
+
+<body>
+  <p>
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+  </p>
+  <a name="link1">link1</a>
+
+  <p style="color: blue">
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+    text text text text text text text text text text text text text text <br>
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+  </p>
+
+  <h1 id="heading_1">heading 1</h1>
+  <p style="color: blue">
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+    text text text text text text text text text text text text text text <br>
+  </p>
+</body>
+<html>
diff --git a/accessible/tests/mochitest/events/slow_image.sjs b/accessible/tests/mochitest/events/slow_image.sjs
new file mode 100644
index 0000000000..f322568be6
--- /dev/null
+++ b/accessible/tests/mochitest/events/slow_image.sjs
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+// small red image
+const IMG_BYTES = atob(
+  "iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12" +
+    "P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="
+);
+
+// stolen from file_blocked_script.sjs
+function setGlobalState(data, key) {
+  let x = {
+    data,
+    QueryInterface: ChromeUtils.generateQI([]),
+  };
+  x.wrappedJSObject = x;
+  setObjectState(key, x);
+}
+
+function getGlobalState(key) {
+  var data;
+  getObjectState(key, function (x) {
+    data = x && x.wrappedJSObject.data;
+  });
+  return data;
+}
+
+function handleRequest(request, response) {
+  if (request.queryString == "complete") {
+    // Unblock the previous request.
+    response.setStatusLine(request.httpVersion, 200, "OK");
+    response.setHeader("Cache-Control", "no-cache", false);
+    response.setHeader("Content-Type", "application/json", false);
+    response.write("true"); // the payload doesn't matter.
+
+    let blockedResponse = getGlobalState("a11y-image");
+    if (blockedResponse) {
+      blockedResponse.setStatusLine(request.httpVersion, 200, "OK");
+      blockedResponse.setHeader("Cache-Control", "no-cache", false);
+      blockedResponse.setHeader("Content-Type", "image/png", false);
+      blockedResponse.write(IMG_BYTES);
+      blockedResponse.finish();
+
+      setGlobalState(undefined, "a11y-image");
+    }
+  } else {
+    // Getting the image
+    response.processAsync();
+    // Store the response in the global state
+    setGlobalState(response, "a11y-image");
+  }
+}
diff --git a/accessible/tests/mochitest/events/test_announcement.html b/accessible/tests/mochitest/events/test_announcement.html
new file mode 100644
index 0000000000..eb303e4aa9
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_announcement.html
@@ -0,0 +1,61 @@
+<html>
+
+<head>
+  <title>Announcement event and method testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+  <script type="application/javascript"
+          src="../promisified-events.js"></script>
+
+  <script type="application/javascript">
+    async function doTests() {
+      let acc = getAccessible("display");
+
+      let onAnnounce = waitForEvent(EVENT_ANNOUNCEMENT, acc);
+      acc.announce("please", nsIAccessibleAnnouncementEvent.POLITE);
+      let evt = await onAnnounce;
+      evt.QueryInterface(nsIAccessibleAnnouncementEvent);
+      is(evt.announcement, "please", "announcement matches.");
+      is(evt.priority, nsIAccessibleAnnouncementEvent.POLITE, "priority matches");
+
+      onAnnounce = waitForEvent(EVENT_ANNOUNCEMENT, acc);
+      acc.announce("do it", nsIAccessibleAnnouncementEvent.ASSERTIVE);
+      evt = await onAnnounce;
+      evt.QueryInterface(nsIAccessibleAnnouncementEvent);
+      is(evt.announcement, "do it", "announcement matches.");
+      is(evt.priority, nsIAccessibleAnnouncementEvent.ASSERTIVE,
+        "priority matches");
+
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=1525980"
+     title="Introduce announcement event and method">
+    Mozilla Bug 1525980
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_aria_alert.html b/accessible/tests/mochitest/events/test_aria_alert.html
new file mode 100644
index 0000000000..48f4197b50
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_aria_alert.html
@@ -0,0 +1,84 @@
+<html>
+
+<head>
+  <title>ARIA alert event testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    function showAlert(aID) {
+      this.DOMNode = document.createElement("div");
+
+      this.invoke = function showAlert_invoke() {
+        this.DOMNode.setAttribute("role", "alert");
+        this.DOMNode.setAttribute("id", aID);
+        var text = document.createTextNode("alert");
+        this.DOMNode.appendChild(text);
+        document.body.appendChild(this.DOMNode);
+      };
+
+      this.getID = function showAlert_getID() {
+        return "Show ARIA alert " + aID;
+      };
+    }
+
+    function changeAlert(aID) {
+      this.__defineGetter__("DOMNode", function() { return getNode(aID); });
+
+      this.invoke = function changeAlert_invoke() {
+        this.DOMNode.textContent = "new alert";
+      };
+
+      this.getID = function showAlert_getID() {
+        return "Change ARIA alert " + aID;
+      };
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    // gA11yEventDumpToConsole = true; // debuging
+    // enableLogging("tree,events,verbose");
+
+    var gQueue = null;
+    function doTests() {
+      gQueue = new eventQueue(nsIAccessibleEvent.EVENT_ALERT);
+
+      gQueue.push(new showAlert("alert"));
+      gQueue.push(new changeAlert("alert"));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=591199"
+     title="mochitest for bug 334386: fire alert event when ARIA alert is shown or new its children are inserted">
+    Mozilla Bug 591199
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_aria_menu.html b/accessible/tests/mochitest/events/test_aria_menu.html
new file mode 100644
index 0000000000..b240090cb9
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_aria_menu.html
@@ -0,0 +1,267 @@
+<html>
+
+<head>
+  <title>ARIA menu events testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    const kViaDisplayStyle = 0;
+    const kViaVisibilityStyle = 1;
+
+    function focusMenu(aMenuBarID, aMenuID, aActiveMenuBarID) {
+      this.eventSeq = [];
+
+      if (aActiveMenuBarID) {
+        this.eventSeq.push(new invokerChecker(EVENT_MENU_END,
+                                              getNode(aActiveMenuBarID)));
+      }
+
+      this.eventSeq.push(new invokerChecker(EVENT_MENU_START, getNode(aMenuBarID)));
+      this.eventSeq.push(new invokerChecker(EVENT_FOCUS, getNode(aMenuID)));
+
+      this.invoke = function focusMenu_invoke() {
+        getNode(aMenuID).focus();
+      };
+
+      this.getID = function focusMenu_getID() {
+        return "focus menu '" + aMenuID + "'";
+      };
+    }
+
+    function showMenu(aMenuID, aParentMenuID, aHow) {
+      this.menuNode = getNode(aMenuID);
+
+      // Because of aria-owns processing we may have menupopup start fired before
+      // related show event.
+      this.eventSeq = [
+        new invokerChecker(EVENT_SHOW, this.menuNode),
+        new invokerChecker(EVENT_REORDER, getNode(aParentMenuID)),
+        new invokerChecker(EVENT_MENUPOPUP_START, this.menuNode),
+      ];
+
+      this.invoke = function showMenu_invoke() {
+        if (aHow == kViaDisplayStyle)
+          this.menuNode.style.display = "block";
+        else
+          this.menuNode.style.visibility = "visible";
+      };
+
+      this.getID = function showMenu_getID() {
+        return "Show ARIA menu '" + aMenuID + "' by " +
+          (aHow == kViaDisplayStyle ? "display" : "visibility") +
+          " style tricks";
+      };
+    }
+
+    function closeMenu(aMenuID, aParentMenuID, aHow) {
+      this.menuNode = getNode(aMenuID);
+      this.menu = null;
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, getMenu, this),
+        new invokerChecker(EVENT_MENUPOPUP_END, getMenu, this),
+        new invokerChecker(EVENT_REORDER, getNode(aParentMenuID)),
+      ];
+
+      this.invoke = function closeMenu_invoke() {
+        // Store menu accessible reference while menu is still open.
+        this.menu = getAccessible(this.menuNode);
+
+        // Hide menu.
+        if (aHow == kViaDisplayStyle)
+          this.menuNode.style.display = "none";
+        else
+          this.menuNode.style.visibility = "hidden";
+      };
+
+      this.getID = function closeMenu_getID() {
+        return "Close ARIA menu " + aMenuID + " by " +
+          (aHow == kViaDisplayStyle ? "display" : "visibility") +
+          " style tricks";
+      };
+
+      function getMenu(aThisObj) {
+        return aThisObj.menu;
+      }
+    }
+
+    function focusInsideMenu(aMenuID, aMenuBarID) {
+      this.eventSeq = [
+        new invokerChecker(EVENT_FOCUS, getNode(aMenuID)),
+      ];
+
+      this.unexpectedEventSeq = [
+        new invokerChecker(EVENT_MENU_END, getNode(aMenuBarID)),
+      ];
+
+      this.invoke = function focusInsideMenu_invoke() {
+        getNode(aMenuID).focus();
+      };
+
+      this.getID = function focusInsideMenu_getID() {
+        return "focus menu '" + aMenuID + "'";
+      };
+    }
+
+    function blurMenu(aMenuBarID) {
+      var eventSeq = [
+        new invokerChecker(EVENT_MENU_END, getNode(aMenuBarID)),
+        new invokerChecker(EVENT_FOCUS, getNode("outsidemenu")),
+      ];
+
+      this.__proto__ = new synthClick("outsidemenu", eventSeq);
+
+      this.getID = function blurMenu_getID() {
+        return "blur menu";
+      };
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    // gA11yEventDumpToConsole = true; // debuging
+    // enableLogging("tree,events,verbose");
+
+    var gQueue = null;
+    function doTests() {
+      gQueue = new eventQueue();
+
+      gQueue.push(new focusMenu("menubar2", "menu-help"));
+      gQueue.push(new focusMenu("menubar", "menu-file", "menubar2"));
+      gQueue.push(new showMenu("menupopup-file", "menu-file", kViaDisplayStyle));
+      gQueue.push(new closeMenu("menupopup-file", "menu-file", kViaDisplayStyle));
+      gQueue.push(new showMenu("menupopup-edit", "menu-edit", kViaVisibilityStyle));
+      gQueue.push(new closeMenu("menupopup-edit", "menu-edit", kViaVisibilityStyle));
+      gQueue.push(new focusInsideMenu("menu-edit", "menubar"));
+      gQueue.push(new blurMenu("menubar"));
+
+      gQueue.push(new focusMenu("menubar3", "mb3-mi-outside"));
+      gQueue.push(new showMenu("mb4-menu", document, kViaDisplayStyle));
+      gQueue.push(new focusMenu("menubar4", "mb4-item1"));
+      gQueue.push(new focusMenu("menubar5", "mb5-mi"));
+
+      gQueue.push(new synthFocus("mi6"));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=606207"
+     title="Dojo dropdown buttons are broken">
+    Bug 606207
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=614829"
+     title="Menupopup end event isn't fired for ARIA menus">
+    Bug 614829
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=615189"
+     title="Clean up FireAccessibleFocusEvent">
+    Bug 615189
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=673958"
+     title="Rework accessible focus handling">
+    Bug 673958
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=933322"
+     title="menustart/end events are missing when aria-owns makes a menu hierarchy">
+    Bug 933322
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=934460"
+     title="menustart/end events may be missed when top level menuitem is focused">
+    Bug 934460
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=970005"
+     title="infinite long loop in a11y:FocusManager::ProcessFocusEvent">
+    Bug 970005
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div id="menubar" role="menubar">
+    <div id="menu-file" role="menuitem" tabindex="0">
+      File
+      <div id="menupopup-file" role="menu" style="display: none;">
+        <div id="menuitem-newtab" role="menuitem" tabindex="0">New Tab</div>
+        <div id="menuitem-newwindow" role="menuitem" tabindex="0">New Window</div>
+      </div>
+    </div>
+    <div id="menu-edit" role="menuitem" tabindex="0">
+      Edit
+      <div id="menupopup-edit" role="menu" style="visibility: hidden;">
+        <div id="menuitem-undo" role="menuitem" tabindex="0">Undo</div>
+        <div id="menuitem-redo" role="menuitem" tabindex="0">Redo</div>
+      </div>
+    </div>
+  </div>
+  <div id="menubar2" role="menubar">
+    <div id="menu-help" role="menuitem" tabindex="0">
+      Help
+      <div id="menupopup-help" role="menu" style="display: none;">
+        <div id="menuitem-about" role="menuitem" tabindex="0">About</div>
+      </div>
+    </div>
+  </div>
+  <div tabindex="0" id="outsidemenu">outsidemenu</div>
+
+  <!-- aria-owns relations -->
+  <div id="menubar3" role="menubar" aria-owns="mb3-mi-outside"></div>
+  <div id="mb3-mi-outside" role="menuitem" tabindex="0">Outside</div>
+
+  <div id="menubar4" role="menubar">
+    <div id="mb4_topitem" role="menuitem" aria-haspopup="true"
+         aria-owns="mb4-menu">Item</div>
+  </div>
+  <div id="mb4-menu" role="menu" style="display:none;">
+    <div role="menuitem" id="mb4-item1" tabindex="0">Item 1.1</div>
+    <div role="menuitem" tabindex="0">Item 1.2</div>
+  </div>
+
+  <!-- focus top-level menu item having haspopup -->
+  <div id="menubar5" role="menubar">
+    <div role="menuitem" aria-haspopup="true" id="mb5-mi" tabindex="0">
+      Item
+      <div role="menu" style="display:none;">
+        <div role="menuitem" tabindex="0">Item 1.1</div>
+        <div role="menuitem" tabindex="0">Item 1.2</div>
+      </div>
+    </div>
+  </div>
+
+  <!-- other aria-owns relations -->
+  <div id="mi6" tabindex="0" role="menuitem">aria-owned item</div>
+  <div aria-owns="mi6">Obla</div>
+
+  <div id="eventdump"></div>
+
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_aria_objattr.html b/accessible/tests/mochitest/events/test_aria_objattr.html
new file mode 100644
index 0000000000..709089ca02
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_aria_objattr.html
@@ -0,0 +1,68 @@
+<html>
+
+<head>
+  <title>Accessible ARIA object attribute changes</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../attributes.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+
+    /**
+     * Do tests.
+     */
+    var gQueue = null;
+    function updateAttribute(aID, aAttr, aValue) {
+      this.node = getNode(aID);
+      this.accessible = getAccessible(this.node);
+
+      this.eventSeq = [
+        new objAttrChangedChecker(aID, aAttr),
+      ];
+
+      this.invoke = function updateAttribute_invoke() {
+        this.node.setAttribute(aAttr, aValue);
+      };
+
+      this.getID = function updateAttribute_getID() {
+        return aAttr + " for " + aID + " " + aValue;
+      };
+    }
+
+    // gA11yEventDumpToConsole = true;
+    function doTests() {
+      gQueue = new eventQueue();
+
+      gQueue.push(new updateAttribute("sortable", "aria-sort", "ascending"));
+
+      // For experimental ARIA extensions
+      gQueue.push(new updateAttribute("custom", "aria-blah", "true"));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div id="sortable" role="columnheader" aria-sort="none">aria-sort</div>
+
+  <div id="custom" role="custom" aria-blah="false">Fat free cheese</div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_aria_owns.html b/accessible/tests/mochitest/events/test_aria_owns.html
new file mode 100644
index 0000000000..3c638ad838
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_aria_owns.html
@@ -0,0 +1,122 @@
+<html>
+
+<head>
+  <title>Aria-owns targets shouldn't be on invalidation list so shouldn't have
+         show/hide events</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests.
+
+    // gA11yEventDumpToConsole = true; // debug stuff
+    // enableLogging("tree,eventTree,verbose");
+
+    /**
+     * Aria-owns target shouldn't have a show event.
+     * Markup:
+     * <div id="t1_fc" aria-owns="t1_owns"></div>
+     * <span id="t1_owns"></div>
+     */
+    function testAriaOwns() {
+      this.parent = getNode("t1");
+      this.fc = document.createElement("div");
+      this.fc.setAttribute("id", "t1_fc");
+      this.owns = document.createElement("span");
+      this.owns.setAttribute("id", "t1_owns");
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_SHOW, this.fc),
+        new unexpectedInvokerChecker(EVENT_SHOW, this.owns),
+      ];
+
+      this.invoke = function testAriaOwns_invoke() {
+        getNode("t1").appendChild(this.fc);
+        getNode("t1").appendChild(this.owns);
+        getNode("t1_fc").setAttribute("aria-owns", "t1_owns");
+      };
+
+      this.getID = function testAriaOwns_getID() {
+        return "Aria-owns target shouldn't have show event";
+      };
+    }
+
+    /**
+     * Target of both aria-owns and other aria attribute like aria-labelledby
+     * shouldn't have a show event.
+     * Markup:
+     * <div id="t2_fc" aria-owns="t1_owns"></div>
+     * <div id="t2_sc" aria-labelledby="t2_owns"></div>
+     * <span id="t2_owns"></div>
+     */
+    function testAriaOwnsAndLabelledBy() {
+      this.parent = getNode("t2");
+      this.fc = document.createElement("div");
+      this.fc.setAttribute("id", "t2_fc");
+      this.sc = document.createElement("div");
+      this.sc.setAttribute("id", "t2_sc");
+      this.owns = document.createElement("span");
+      this.owns.setAttribute("id", "t2_owns");
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_SHOW, this.fc),
+        new invokerChecker(EVENT_SHOW, this.sc),
+        new unexpectedInvokerChecker(EVENT_SHOW, this.owns),
+      ];
+
+      this.invoke = function testAriaOwns_invoke() {
+        getNode("t2").appendChild(this.fc);
+        getNode("t2").appendChild(this.sc);
+        getNode("t2").appendChild(this.owns);
+        getNode("t2_fc").setAttribute("aria-owns", "t2_owns");
+        getNode("t2_sc").setAttribute("aria-labelledby", "t2_owns");
+      };
+
+      this.getID = function testAriaOwns_getID() {
+        return "Aria-owns and aria-labelledby target shouldn't have show event";
+      };
+    }
+
+    var gQueue = null;
+    function doTests() {
+      gQueue = new eventQueue();
+      gQueue.push(new testAriaOwns());
+      gQueue.push(new testAriaOwnsAndLabelledBy());
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=1296420"
+     title="Aria-owns targets shouldn't be on invalidation list so shouldn't
+            have show/hide events">
+    Mozilla Bug 1296420
+  </a><br>
+
+  <div id="testContainer">
+    <div id="t1"></div>
+
+    <div id="t2"></div>
+  </div>
+
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_aria_statechange.html b/accessible/tests/mochitest/events/test_aria_statechange.html
new file mode 100644
index 0000000000..7796d88ec4
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_aria_statechange.html
@@ -0,0 +1,231 @@
+<html>
+
+<head>
+  <title>ARIA state change event testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    let PromEvents = {};
+    Services.scriptloader.loadSubScript(
+      "chrome://mochitests/content/a11y/accessible/tests/mochitest/promisified-events.js",
+      PromEvents);
+
+    /**
+     * Do tests.
+     */
+    var gQueue = null;
+
+    // gA11yEventDumpID = "eventdump"; // debugging
+    // gA11yEventDumpToConsole = true; // debugging
+
+    function expandNode(aID, aIsExpanded) {
+      this.DOMNode = getNode(aID);
+
+      this.eventSeq = [
+        new expandedStateChecker(aIsExpanded, this.DOMNode),
+      ];
+
+      this.invoke = function expandNode_invoke() {
+        this.DOMNode.setAttribute("aria-expanded",
+                                  (aIsExpanded ? "true" : "false"));
+      };
+
+      this.getID = function expandNode_getID() {
+        return prettyName(aID) + " aria-expanded changed to '" + aIsExpanded + "'";
+      };
+    }
+
+    function busyify(aID, aIsBusy) {
+      this.DOMNode = getNode(aID);
+
+      this.eventSeq = [
+        new stateChangeChecker(STATE_BUSY, kOrdinalState, aIsBusy, this.DOMNode),
+      ];
+
+      this.invoke = function busyify_invoke() {
+        this.DOMNode.setAttribute("aria-busy", (aIsBusy ? "true" : "false"));
+      };
+
+      this.getID = function busyify_getID() {
+        return prettyName(aID) + " aria-busy changed to '" + aIsBusy + "'";
+      };
+    }
+
+    function makeCurrent(aID, aIsCurrent, aValue) {
+      this.DOMNode = getNode(aID);
+
+      this.eventSeq = [
+        new stateChangeChecker(EXT_STATE_CURRENT, true, aIsCurrent, this.DOMNode),
+      ];
+
+      this.invoke = function makeCurrent_invoke() {
+        this.DOMNode.setAttribute("aria-current", aValue);
+      };
+
+      this.getID = function makeCurrent_getID() {
+        return prettyName(aID) + " aria-current changed to " + aValue;
+      };
+    }
+
+    async function testToggleAttribute(aID, aAttribute, aIncludeMixed) {
+      let toggleState = aAttribute == "aria-pressed" ? STATE_PRESSED : STATE_CHECKED;
+
+      // bug 472142. Role changes here if aria-pressed is added,
+      // accessible should be recreated?
+      let stateChange = PromEvents.waitForStateChange(aID, toggleState, true);
+      getNode(aID).setAttribute(aAttribute, "true");
+      await stateChange;
+
+      stateChange = PromEvents.waitForStateChange(aID, toggleState, false);
+      getNode(aID).setAttribute(aAttribute, "false");
+      await stateChange;
+
+      if (aIncludeMixed) {
+        stateChange = PromEvents.waitForStateChange(aID, STATE_MIXED, true);
+        getNode(aID).setAttribute(aAttribute, "mixed");
+        await stateChange;
+
+        stateChange = PromEvents.waitForStateChange(aID, STATE_MIXED, false);
+        getNode(aID).setAttribute(aAttribute, "");
+        await stateChange;
+      }
+
+      stateChange = PromEvents.waitForStateChange(aID, toggleState, true);
+      getNode(aID).setAttribute(aAttribute, "true");
+      await stateChange;
+
+      if (aIncludeMixed) {
+        stateChange = Promise.all([
+          PromEvents.waitForStateChange(aID, STATE_MIXED, true),
+          PromEvents.waitForStateChange(aID, toggleState, false)]);
+        getNode(aID).setAttribute(aAttribute, "mixed");
+        await stateChange;
+
+        stateChange = Promise.all([
+          PromEvents.waitForStateChange(aID, STATE_MIXED, false),
+          PromEvents.waitForStateChange(aID, toggleState, true)]);
+        getNode(aID).setAttribute(aAttribute, "true");
+        await stateChange;
+      }
+
+      // bug 472142. Role changes here too if aria-pressed is removed,
+      // accessible should be recreated?
+      stateChange = PromEvents.waitForStateChange(aID, toggleState, false);
+      getNode(aID).removeAttribute(aAttribute);
+      await stateChange;
+    }
+
+    async function doTests() {
+      gQueue = new eventQueue();
+
+      let queueFinished = new Promise(resolve => {
+        gQueue.onFinish = function() {
+          resolve();
+          return DO_NOT_FINISH_TEST;
+        };
+      });
+
+      gQueue.push(new expandNode("section", true));
+      gQueue.push(new expandNode("section", false));
+      gQueue.push(new expandNode("div", true));
+      gQueue.push(new expandNode("div", false));
+
+      gQueue.push(new busyify("aria_doc", true));
+      gQueue.push(new busyify("aria_doc", false));
+
+      gQueue.push(new makeCurrent("current_page_1", false, "false"));
+      gQueue.push(new makeCurrent("current_page_2", true, "page"));
+      gQueue.push(new makeCurrent("current_page_2", false, "false"));
+      gQueue.push(new makeCurrent("current_page_3", true, "true"));
+      gQueue.push(new makeCurrent("current_page_3", false, ""));
+
+      gQueue.invoke();
+      await queueFinished;
+      // Tests beyond this point use await rather than eventQueue.
+
+      await testToggleAttribute("pressable", "aria-pressed", true);
+      await testToggleAttribute("pressable_native", "aria-pressed", true);
+      await testToggleAttribute("checkable", "aria-checked", true);
+      await testToggleAttribute("checkableBool", "aria-checked", false);
+
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=551684"
+     title="No statechange event for aria-expanded on native HTML elements, is fired on ARIA widgets">
+    Mozilla Bug 551684
+  </a><br>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=648133"
+     title="fire state change event for aria-busy">
+    Mozilla Bug 648133
+  </a><br>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=467143"
+     title="mixed state change event is fired for focused accessible only">
+    Mozilla Bug 467143
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=989958"
+     title="Pressed state is not exposed on a button element with aria-pressed attribute">
+    Mozilla Bug 989958
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=1136563"
+     title="Support ARIA 1.1 switch role">
+    Mozilla Bug 1136563
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=1355921"
+     title="Elements with a defined, non-false value for aria-current should expose ATK_STATE_ACTIVE">
+    Mozilla Bug 1355921
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+  <div id="eventdump"></div>
+
+  <!-- aria-expanded -->
+  <div id="section" role="section" aria-expanded="false">expandable section</div>
+  <div id="div" aria-expanded="false">expandable native div</div>
+
+  <!-- aria-busy -->
+  <div id="aria_doc" role="document" tabindex="0">A document</div>
+
+  <!-- aria-pressed -->
+  <div id="pressable" role="button"></div>
+  <button id="pressable_native"></button>
+
+  <!-- aria-checked -->
+  <div id="checkable" role="checkbox"></div>
+  <div id="checkableBool" role="switch"></div>
+
+  <!-- aria-current -->
+  <div id="current_page_1" role="link" aria-current="page">1</div>
+  <div id="current_page_2" role="link" aria-current="false">2</div>
+  <div id="current_page_3" role="link">3</div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_attrchange.html b/accessible/tests/mochitest/events/test_attrchange.html
new file mode 100644
index 0000000000..edd9195ddd
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_attrchange.html
@@ -0,0 +1,107 @@
+<html>
+
+<head>
+  <title>Accessible attr change event testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../promisified-events.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+
+  <script type="application/javascript">
+    async function testGotAttrChange(elem, name, value) {
+      const waitFor = waitForEvent(EVENT_OBJECT_ATTRIBUTE_CHANGED, elem);
+      if (value) {
+        document.getElementById(elem).setAttribute(name, value);
+      } else {
+        document.getElementById(elem).removeAttribute(name);
+      }
+      await waitFor;
+    }
+
+    async function doTests() {
+      info("Removing summary attr");
+      // after summary is removed, we should have a layout table
+      await testGotAttrChange(
+        "sampleTable",
+        "summary",
+        null
+        );
+
+      info("Setting abbr attr");
+      // after abbr is set we should have a data table again
+      await testGotAttrChange(
+        "cellOne",
+        "abbr",
+        "hello world"
+        );
+
+      info("Removing abbr attr");
+      // after abbr is removed we should have a layout table again
+      await testGotAttrChange(
+        "cellOne",
+        "abbr",
+        null
+        );
+
+      info("Setting scope attr");
+      // after scope is set we should have a data table again
+      await testGotAttrChange(
+        "cellOne",
+        "scope",
+        "col"
+        );
+
+      info("Removing scope attr");
+      // remove scope should give layout
+      await testGotAttrChange(
+        "cellOne",
+        "scope",
+        null
+        );
+
+      info("Setting headers attr");
+      // add headers attr should give data
+      await testGotAttrChange(
+        "cellThree",
+        "headers",
+        "cellOne"
+        );
+
+      info("Removing headers attr");
+      // remove headers attr should give layout
+      await testGotAttrChange(
+        "cellThree",
+        "headers",
+        null
+        );
+
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+<body>
+  <table id="sampleTable" summary="example summary">
+      <tr>
+        <td id="cellOne">cell1</td>
+        <td>cell2</td>
+      </tr>
+      <tr>
+        <td id="cellThree">cell3</td>
+        <td>cell4</td>
+      </tr>
+    </table>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_attrs.html b/accessible/tests/mochitest/events/test_attrs.html
new file mode 100644
index 0000000000..c09bd9cf1e
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_attrs.html
@@ -0,0 +1,85 @@
+<html>
+
+<head>
+  <title>Event object attributes tests</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+  <script type="application/javascript"
+          src="../attributes.js"></script>
+
+  <script type="application/javascript">
+
+    /**
+     * Test "event-from-input" object attribute.
+     */
+    function eventFromInputChecker(aEventType, aID, aValue, aNoTargetID) {
+      this.type = aEventType;
+      this.target = getAccessible(aID);
+
+      this.noTarget = getNode(aNoTargetID);
+
+      this.check = function checker_check(aEvent) {
+        testAttrs(aEvent.accessible, { "event-from-input": aValue }, true);
+
+        var accessible = getAccessible(this.noTarget);
+        testAbsentAttrs(accessible, { "event-from-input": "" });
+      };
+    }
+
+    /**
+     * Do tests.
+     */
+    var gQueue = null;
+
+    // gA11yEventDumpID = "eventdump"; // debug stuff
+    // gA11yEventDumpToConsole = true; // debug stuff
+
+    function doTests() {
+      gQueue = new eventQueue();
+
+      var id = "textbox", noTargetId = "textarea";
+      let checker =
+        new eventFromInputChecker(EVENT_FOCUS, id, "false", noTargetId);
+      gQueue.push(new synthFocus(id, checker));
+
+      if (!MAC) { // Mac failure is bug 541093
+        checker =
+          new eventFromInputChecker(EVENT_TEXT_CARET_MOVED, id, "true", noTargetId);
+        gQueue.push(new synthHomeKey(id, checker));
+      }
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=540285"
+     title="Event object attributes testing">
+    Mozilla Bug 540285
+  </a>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <input id="textbox" value="hello">
+  <textarea id="textarea"></textarea>
+
+  <div id="eventdump"></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_bug1322593-2.html b/accessible/tests/mochitest/events/test_bug1322593-2.html
new file mode 100644
index 0000000000..05bd31ffa6
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_bug1322593-2.html
@@ -0,0 +1,77 @@
+<html>
+
+<head>
+  <title>Accessible mutation events testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    function changeMultipleElements() {
+      this.node1 = getNode("span1");
+      this.node2 = getNode("span2");
+
+      this.eventSeq = [
+        new textChangeChecker("container", 0, 5, "hello", false, undefined, true),
+        new textChangeChecker("container", 6, 11, "world", false, undefined, true),
+        new orderChecker(),
+        new textChangeChecker("container", 0, 1, "a", true, undefined, true),
+        new textChangeChecker("container", 7, 8, "b", true, undefined, true),
+      ];
+
+      this.invoke = function changeMultipleElements_invoke() {
+        this.node1.textContent = "a";
+        this.node2.textContent = "b";
+      };
+
+      this.getID = function changeMultipleElements_invoke_getID() {
+        return "Change the text content of multiple sibling divs";
+      };
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+//    gA11yEventDumpToConsole = true; // debugging
+
+    var gQueue = null;
+    function doTests() {
+      gQueue = new eventQueue();
+
+      gQueue.push(new changeMultipleElements());
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=1322593"
+     title="missing text change events when multiple elements updated at once">
+    Mozilla Bug 1322593
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div id="container">
+  <span id="span1">hello</span>
+  <span>your</span>
+  <span id="span2">world</span>
+  </div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_bug1322593.html b/accessible/tests/mochitest/events/test_bug1322593.html
new file mode 100644
index 0000000000..968e808106
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_bug1322593.html
@@ -0,0 +1,74 @@
+<html>
+
+<head>
+  <title>Accessible mutation events testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    function changeMultipleElements() {
+      this.node1 = getNode("div1");
+      this.node2 = getNode("div2");
+
+      this.eventSeq = [
+        new textChangeChecker("div1", 0, 5, "hello", false, undefined, true),
+        new textChangeChecker("div2", 0, 5, "world", false, undefined, true),
+        new orderChecker(),
+        new textChangeChecker("div1", 0, 1, "a", true, undefined, true),
+        new textChangeChecker("div2", 0, 1, "b", true, undefined, true),
+      ];
+
+      this.invoke = function changeMultipleElements_invoke() {
+        this.node1.textContent = "a";
+        this.node2.textContent = "b";
+      };
+
+      this.getID = function changeMultipleElements_invoke_getID() {
+        return "Change the text content of multiple sibling divs";
+      };
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+//    gA11yEventDumpToConsole = true; // debugging
+
+    var gQueue = null;
+    function doTests() {
+      gQueue = new eventQueue();
+
+      gQueue.push(new changeMultipleElements());
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=1322593"
+     title="missing text change events when multiple elements updated at once">
+    Mozilla Bug 1322593
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div id="div1">hello</div>
+  <div id="div2">world</div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_caretmove.html b/accessible/tests/mochitest/events/test_caretmove.html
new file mode 100644
index 0000000000..d1091ac7f1
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_caretmove.html
@@ -0,0 +1,142 @@
+<html>
+
+<head>
+  <title>Accessible caret move events testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    /**
+     * Click checker.
+     */
+    function clickChecker(aCaretOffset, aIsSelectionCollapsed, aID, aExtraNodeOrID, aExtraCaretOffset) {
+      this.__proto__ = new caretMoveChecker(aCaretOffset, aIsSelectionCollapsed, aID);
+
+      this.extraNode = getNode(aExtraNodeOrID);
+
+      this.check = function clickChecker_check(aEvent) {
+        this.__proto__.check(aEvent);
+
+        if (this.extraNode) {
+          var acc = getAccessible(this.extraNode, [nsIAccessibleText]);
+          is(acc.caretOffset, aExtraCaretOffset,
+             "Wrong caret offset for " + aExtraNodeOrID);
+        }
+      };
+    }
+
+    /**
+     * Do tests.
+     */
+    var gQueue = null;
+
+    // gA11yEventDumpToConsole = true;
+
+    function doTests() {
+      // test caret move events and caret offsets
+      gQueue = new eventQueue();
+
+      var id = "textbox";
+      gQueue.push(new synthFocus(id, new caretMoveChecker(5, true, id)));
+      gQueue.push(new synthSelectAll(id, new caretMoveChecker(5, false, id)));
+      gQueue.push(new synthClick(id, new caretMoveChecker(0, true, id)));
+      gQueue.push(new synthRightKey(id, new caretMoveChecker(1, true, id)));
+
+      if (!MAC) {
+        gQueue.push(new synthSelectAll(id, new caretMoveChecker(5, false, id)));
+        gQueue.push(new synthHomeKey(id, new caretMoveChecker(0, true, id)));
+        gQueue.push(new synthRightKey(id, new caretMoveChecker(1, true, id)));
+      }
+      else {
+        todo(false, "Make these tests pass on OSX (bug 650294)");
+      }
+
+      id = "textarea";
+      gQueue.push(new synthClick(id, new caretMoveChecker(0, true, id)));
+      gQueue.push(new synthRightKey(id, new caretMoveChecker(1, true, id)));
+      gQueue.push(new synthDownKey(id, new caretMoveChecker(12, true, id)));
+
+      id = "textarea_wrapped";
+      gQueue.push(new setCaretOffset(id, 4, id));
+      gQueue.push(new synthLeftKey(id, new caretMoveChecker(4, true, id)));
+
+      id = "p";
+      gQueue.push(new synthClick(id, new caretMoveChecker(0, true, id)));
+      gQueue.push(new synthRightKey(id, new caretMoveChecker(1, true, id)));
+      gQueue.push(new synthDownKey(id, new caretMoveChecker(6, true, id)));
+
+      id = "p1_in_div";
+      gQueue.push(new synthClick(id, new clickChecker(0, true, id, "p2_in_div", -1)));
+
+      id = "p";
+      gQueue.push(new synthShiftTab(id, new caretMoveChecker(0, true, id)));
+      id = "textarea";
+      gQueue.push(new synthShiftTab(id, new caretMoveChecker(12, true, id)));
+      id = "p";
+      gQueue.push(new synthTab(id, new caretMoveChecker(0, true, id)));
+
+      // Set caret after a child of span element, i.e. after 'text' text.
+      gQueue.push(new moveCaretToDOMPoint("test1", getNode("test1_span"), 1,
+                                           4, "test1"));
+      gQueue.push(new moveCaretToDOMPoint("test2", getNode("test2_span"), 1,
+                                           4, "test2"));
+
+      // empty text element
+      gQueue.push(new moveCaretToDOMPoint("test3", getNode("test3"), 0,
+                                           0, "test3"));
+      gQueue.push(new moveCaretToDOMPoint("test4", getNode("test4_span"), 0,
+                                           0, "test4"));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=454377"
+     title="Accessible caret move events testing">
+    Bug 454377
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=567571"
+     title="caret-moved events missing at the end of a wrapped line of text">
+    Bug 567571
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=824901"
+     title="HyperTextAccessible::DOMPointToHypertextOffset fails for node and offset equal to node child count">
+    Bug 824901
+  </a>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <input id="textbox" value="hello"/>
+
+  <textarea id="textarea">text<br>text</textarea>
+  <p id="p" contentEditable="true"><span>text</span><br/>text</p>
+  <div id="div" contentEditable="true"><p id="p1_in_div">text</p><p id="p2_in_div">text</p></div>
+
+  <p contentEditable="true" id="test1"><span id="test1_span">text</span>ohoho</p>
+  <p contentEditable="true" id="test2"><span><span id="test2_span">text</span></span>ohoho</p>
+  <p contentEditable="true" id="test3"></p>
+  <p contentEditable="true" id="test4"><span id="test4_span"></span></p>
+
+  <textarea id="textarea_wrapped" cols="5">hey friend</textarea>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_coalescence.html b/accessible/tests/mochitest/events/test_coalescence.html
new file mode 100644
index 0000000000..0f8ad52a8b
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_coalescence.html
@@ -0,0 +1,817 @@
+<html>
+
+<head>
+  <title>Accessible mutation events coalescence testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Invoker base classes
+
+    const kRemoveElm = 1;
+    const kHideElm = 2;
+    const kAddElm = 3;
+    const kShowElm = 4;
+
+    /**
+     * Base class to test of mutation events coalescence.
+     */
+    function coalescenceBase(aChildAction, aParentAction,
+                             aPerformActionOnChildInTheFirstPlace) {
+      // Invoker interface
+
+      this.invoke = function coalescenceBase_invoke() {
+        if (aPerformActionOnChildInTheFirstPlace) {
+          this.invokeAction(this.childNode, aChildAction);
+          this.invokeAction(this.parentNode, aParentAction);
+        } else {
+          this.invokeAction(this.parentNode, aParentAction);
+          this.invokeAction(this.childNode, aChildAction);
+        }
+      };
+
+      this.getID = function coalescenceBase_getID() {
+        var childAction = this.getActionName(aChildAction) + " child";
+        var parentAction = this.getActionName(aParentAction) + " parent";
+
+        if (aPerformActionOnChildInTheFirstPlace)
+          return childAction + " and then " + parentAction;
+
+        return parentAction + " and then " + childAction;
+      };
+
+      this.finalCheck = function coalescenceBase_check() {
+        if (this.getEventType(aChildAction) == EVENT_HIDE) {
+          testIsDefunct(this.child);
+        }
+        if (this.getEventType(aParentAction) == EVENT_HIDE) {
+          testIsDefunct(this.parent);
+        }
+      };
+
+      // Implementation details
+
+      this.invokeAction = function coalescenceBase_invokeAction(aNode, aAction) {
+        switch (aAction) {
+          case kRemoveElm:
+            aNode.remove();
+            break;
+
+          case kHideElm:
+            aNode.style.display = "none";
+            break;
+
+          case kAddElm:
+            if (aNode == this.parentNode)
+              this.hostNode.appendChild(this.parentNode);
+            else
+              this.parentNode.appendChild(this.childNode);
+            break;
+
+          case kShowElm:
+            aNode.style.display = "block";
+            break;
+
+          default:
+            return INVOKER_ACTION_FAILED;
+        }
+        // 0 means the action succeeded.
+        return 0;
+      };
+
+      this.getEventType = function coalescenceBase_getEventType(aAction) {
+        switch (aAction) {
+          case kRemoveElm: case kHideElm:
+            return EVENT_HIDE;
+          case kAddElm: case kShowElm:
+            return EVENT_SHOW;
+        }
+        return 0;
+      };
+
+      this.getActionName = function coalescenceBase_getActionName(aAction) {
+        switch (aAction) {
+          case kRemoveElm:
+            return "remove";
+          case kHideElm:
+            return "hide";
+          case kAddElm:
+            return "add";
+          case kShowElm:
+            return "show";
+          default:
+            return "??";
+        }
+      };
+
+      this.initSequence = function coalescenceBase_initSequence() {
+        // expected events
+        var eventType = this.getEventType(aParentAction);
+        this.eventSeq = [
+          new invokerChecker(eventType, this.parentNode),
+          new invokerChecker(EVENT_REORDER, this.hostNode),
+        ];
+
+        // unexpected events
+        this.unexpectedEventSeq = [
+          new invokerChecker(this.getEventType(aChildAction), this.childNode),
+          new invokerChecker(EVENT_REORDER, this.parentNode),
+        ];
+      };
+    }
+
+    /**
+     * Remove or hide mutation events coalescence testing.
+     */
+    function removeOrHideCoalescenceBase(aChildID, aParentID,
+                                         aChildAction, aParentAction,
+                                         aPerformActionOnChildInTheFirstPlace) {
+      this.__proto__ = new coalescenceBase(aChildAction, aParentAction,
+                                           aPerformActionOnChildInTheFirstPlace);
+
+      this.init = function removeOrHideCoalescenceBase_init() {
+        this.childNode = getNode(aChildID);
+        this.parentNode = getNode(aParentID);
+        this.child = getAccessible(this.childNode);
+        this.parent = getAccessible(this.parentNode);
+        this.hostNode = this.parentNode.parentNode;
+      };
+
+      // Initalization
+
+      this.init();
+      this.initSequence();
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    /**
+     * Remove child node and then its parent node from DOM tree.
+     */
+    function removeChildNParent(aChildID, aParentID) {
+      this.__proto__ = new removeOrHideCoalescenceBase(aChildID, aParentID,
+                                                       kRemoveElm, kRemoveElm,
+                                                       true);
+    }
+
+    /**
+     * Remove parent node and then its child node from DOM tree.
+     */
+    function removeParentNChild(aChildID, aParentID) {
+      this.__proto__ = new removeOrHideCoalescenceBase(aChildID, aParentID,
+                                                       kRemoveElm, kRemoveElm,
+                                                       false);
+    }
+
+    /**
+     * Hide child node and then its parent node.
+     */
+    function hideChildNParent(aChildID, aParentID) {
+      this.__proto__ = new removeOrHideCoalescenceBase(aChildID, aParentID,
+                                                       kHideElm, kHideElm,
+                                                       true);
+    }
+
+    /**
+     * Hide parent node and then its child node.
+     */
+    function hideParentNChild(aChildID, aParentID) {
+      this.__proto__ = new removeOrHideCoalescenceBase(aChildID, aParentID,
+                                                       kHideElm, kHideElm,
+                                                       false);
+    }
+
+    /**
+     * Hide child node and then remove its parent node.
+     */
+    function hideChildNRemoveParent(aChildID, aParentID) {
+      this.__proto__ = new removeOrHideCoalescenceBase(aChildID, aParentID,
+                                                       kHideElm, kRemoveElm,
+                                                       true);
+    }
+
+    /**
+     * Hide parent node and then remove its child node.
+     */
+    function hideParentNRemoveChild(aChildID, aParentID) {
+      this.__proto__ = new removeOrHideCoalescenceBase(aChildID, aParentID,
+                                                       kRemoveElm, kHideElm,
+                                                       false);
+    }
+
+    /**
+     * Remove child node and then hide its parent node.
+     */
+    function removeChildNHideParent(aChildID, aParentID) {
+      this.__proto__ = new removeOrHideCoalescenceBase(aChildID, aParentID,
+                                                       kRemoveElm, kHideElm,
+                                                       true);
+    }
+
+    /**
+     * Remove parent node and then hide its child node.
+     */
+    function removeParentNHideChild(aChildID, aParentID) {
+      this.__proto__ = new removeOrHideCoalescenceBase(aChildID, aParentID,
+                                                       kHideElm, kRemoveElm,
+                                                       false);
+    }
+
+    /**
+     * Create and append parent node and create and append child node to it.
+     */
+    function addParentNChild(aHostID, aPerformActionOnChildInTheFirstPlace) {
+      this.init = function addParentNChild_init() {
+        this.hostNode = getNode(aHostID);
+        this.parentNode = document.createElement("select");
+        this.childNode = document.createElement("option");
+        this.childNode.textContent = "testing";
+      };
+
+      this.__proto__ = new coalescenceBase(kAddElm, kAddElm,
+                                           aPerformActionOnChildInTheFirstPlace);
+
+      this.init();
+      this.initSequence();
+    }
+
+    /**
+     * Show parent node and show child node to it.
+     */
+    function showParentNChild(aParentID, aChildID,
+                              aPerformActionOnChildInTheFirstPlace) {
+      this.init = function showParentNChild_init() {
+        this.parentNode = getNode(aParentID);
+        this.hostNode = this.parentNode.parentNode;
+        this.childNode = getNode(aChildID);
+      };
+
+      this.__proto__ = new coalescenceBase(kShowElm, kShowElm,
+                                           aPerformActionOnChildInTheFirstPlace);
+
+      this.init();
+      this.initSequence();
+    }
+
+    /**
+     * Create and append child node to the DOM and then show parent node.
+     */
+    function showParentNAddChild(aParentID,
+                                 aPerformActionOnChildInTheFirstPlace) {
+      this.init = function showParentNAddChild_init() {
+        this.parentNode = getNode(aParentID);
+        this.hostNode = this.parentNode.parentNode;
+        this.childNode = document.createElement("option");
+        this.childNode.textContent = "testing";
+      };
+
+      this.__proto__ = new coalescenceBase(kAddElm, kShowElm,
+                                           aPerformActionOnChildInTheFirstPlace);
+
+      this.init();
+      this.initSequence();
+    }
+
+    /**
+     * Remove children and parent
+     */
+    function removeGrandChildrenNHideParent(aChild1Id, aChild2Id, aParentId) {
+      this.child1 = getNode(aChild1Id);
+      this.child2 = getNode(aChild2Id);
+      this.parent = getNode(aParentId);
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, getAccessible(aParentId)),
+        new invokerChecker(EVENT_REORDER, getNode(aParentId).parentNode),
+        new unexpectedInvokerChecker(EVENT_HIDE, getAccessible(aChild1Id)),
+        new unexpectedInvokerChecker(EVENT_HIDE, getAccessible(aChild2Id)),
+        new unexpectedInvokerChecker(EVENT_REORDER, getAccessible(aParentId)),
+      ];
+
+      this.invoke = function removeGrandChildrenNHideParent_invoke() {
+        this.child1.remove();
+        this.child2.remove();
+        this.parent.hidden = true;
+      };
+
+      this.getID = function removeGrandChildrenNHideParent_getID() {
+        return "remove grand children of different parents and then hide their grand parent";
+      };
+    }
+
+    /**
+     * Remove a child, and then its parent.
+     */
+    function test3() {
+      this.o = getAccessible("t3_o");
+      this.ofc = getAccessible("t3_o").firstChild;
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, this.o),
+        new invokerChecker(EVENT_REORDER, "t3_lb"),
+        new unexpectedInvokerChecker(EVENT_HIDE, this.ofc),
+        new unexpectedInvokerChecker(EVENT_REORDER, this.o),
+      ];
+
+      this.invoke = function test3_invoke() {
+        getNode("t3_o").textContent = "";
+        getNode("t3_lb").removeChild(getNode("t3_o"));
+      };
+
+      this.finalCheck = function test3_finalCheck() {
+        testIsDefunct(this.o);
+        testIsDefunct(this.ofc);
+      };
+
+      this.getID = function test3_getID() {
+        return "remove a child, and then its parent";
+      };
+    }
+
+    /**
+     * Remove children, and then a parent of 2nd child.
+     */
+    function test4() {
+      this.o1 = getAccessible("t4_o1");
+      this.o1fc = this.o1.firstChild;
+      this.o2 = getAccessible("t4_o2");
+      this.o2fc = this.o2.firstChild;
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, this.o1fc),
+        new invokerChecker(EVENT_HIDE, this.o2),
+        new invokerChecker(EVENT_REORDER, "t4_lb"),
+        new unexpectedInvokerChecker(EVENT_HIDE, this.o2fc),
+        new unexpectedInvokerChecker(EVENT_REORDER, this.o1),
+        new unexpectedInvokerChecker(EVENT_REORDER, this.o2),
+      ];
+
+      this.invoke = function test4_invoke() {
+        getNode("t4_o1").textContent = "";
+        getNode("t4_o2").textContent = "";
+        getNode("t4_lb").removeChild(getNode("t4_o2"));
+      };
+
+      this.finalCheck = function test4_finalCheck() {
+        testIsDefunct(this.o1fc);
+        testIsDefunct(this.o2);
+        testIsDefunct(this.o2fc);
+      };
+
+      this.getID = function test4_getID() {
+        return "remove children, and then a parent of 2nd child";
+      };
+    }
+
+    /**
+     * Remove a child, remove a parent sibling, remove the parent
+     */
+    function test5() {
+      this.o = getAccessible("t5_o");
+      this.ofc = this.o.firstChild;
+      this.b = getAccessible("t5_b");
+      this.lb = getAccessible("t5_lb");
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, this.b),
+        new invokerChecker(EVENT_HIDE, this.o),
+        new invokerChecker(EVENT_REORDER, "t5"),
+        new unexpectedInvokerChecker(EVENT_HIDE, this.ofc),
+        new unexpectedInvokerChecker(EVENT_REORDER, this.o),
+        new unexpectedInvokerChecker(EVENT_REORDER, this.lb),
+      ];
+
+      this.invoke = function test5_invoke() {
+        getNode("t5_o").textContent = "";
+        getNode("t5").removeChild(getNode("t5_b"));
+        getNode("t5_lb").removeChild(getNode("t5_o"));
+      };
+
+      this.finalCheck = function test5_finalCheck() {
+        testIsDefunct(this.ofc);
+        testIsDefunct(this.o);
+        testIsDefunct(this.b);
+      };
+
+      this.getID = function test5_getID() {
+        return "remove a child, remove a parent sibling, remove the parent";
+      };
+    }
+
+    /**
+     * Insert accessibles with a child node moved by aria-owns
+     * Markup:
+     * <div id="t6_fc">
+     *   <div id="t6_owns"></div>
+     * </div>
+     * <div id="t6_sc" aria-owns="t6_owns"></div>
+     */
+    function test6() {
+      this.parent = getNode("t6");
+      this.fc = document.createElement("div");
+      this.fc.setAttribute("id", "t6_fc");
+      this.owns = document.createElement("div");
+      this.owns.setAttribute("id", "t6_owns");
+      this.sc = document.createElement("div");
+      this.sc.setAttribute("id", "t6_sc");
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_SHOW, this.fc),
+        new invokerChecker(EVENT_SHOW, this.sc),
+        new invokerChecker(EVENT_REORDER, this.parent),
+        new unexpectedInvokerChecker(EVENT_REORDER, this.fc),
+        new unexpectedInvokerChecker(EVENT_REORDER, this.sc),
+        new unexpectedInvokerChecker(EVENT_HIDE, this.owns),
+        new unexpectedInvokerChecker(EVENT_SHOW, this.owns),
+      ];
+
+      this.invoke = function test6_invoke() {
+        getNode("t6").appendChild(this.fc);
+        getNode("t6_fc").appendChild(this.owns);
+        getNode("t6").appendChild(this.sc);
+        getNode("t6_sc").setAttribute("aria-owns", "t6_owns");
+      };
+
+      this.getID = function test6_getID() {
+        return "Insert accessibles with a child node moved by aria-owns";
+      };
+    }
+
+    /**
+     * Insert text nodes under direct and grand children, and then hide
+     * their container by means of aria-owns.
+     *
+     * Markup:
+     * <div id="t7_moveplace" aria-owns="t7_c"></div>
+     * <div id="t7_c">
+     *   <div id="t7_c_directchild">ha</div>
+     *   <div><div id="t7_c_grandchild">ha</div></div>
+     * </div>
+     */
+    function test7() {
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, getNode("t7_c")),
+        new invokerChecker(EVENT_SHOW, getNode("t7_c")),
+        new invokerChecker(EVENT_REORDER, getNode("t7")),
+        new unexpectedInvokerChecker(EVENT_REORDER, getNode("t7_c_directchild")),
+        new unexpectedInvokerChecker(EVENT_REORDER, getNode("t7_c_grandchild")),
+        new unexpectedInvokerChecker(EVENT_SHOW, () => getNode("t7_c_directchild").firstChild),
+        new unexpectedInvokerChecker(EVENT_SHOW, () => getNode("t7_c_grandchild").firstChild),
+      ];
+
+      this.invoke = function test7_invoke() {
+        getNode("t7_c_directchild").textContent = "ha";
+        getNode("t7_c_grandchild").textContent = "ha";
+        getNode("t7_moveplace").setAttribute("aria-owns", "t7_c");
+      };
+
+      this.getID = function test7_getID() {
+        return "Show child accessibles and then hide their container";
+      };
+    }
+
+    /**
+     * Move a node by aria-owns from right to left in the tree, so that
+     * the eventing looks this way:
+     * reorder for 't8_c1'
+     *   hide for 't8_c1_child'
+     *   show for 't8_c2_moved'
+     * reorder for 't8_c2'
+     *   hide for 't8_c2_moved'
+     *
+     * The hide event should be delivered before the paired show event.
+     */
+    function test8() {
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, getNode("t8_c1_child")),
+        new invokerChecker(EVENT_HIDE, "t8_c2_moved"),
+        new invokerChecker(EVENT_SHOW, "t8_c2_moved"),
+        new invokerChecker(EVENT_REORDER, "t8_c2"),
+        new invokerChecker(EVENT_REORDER, "t8_c1"),
+      ];
+
+      this.invoke = function test8_invoke() {
+        // Remove a node from 't8_c1' container to give the event tree a
+        // desired structure (the 't8_c1' container node goes first in the event
+        // tree)
+        getNode("t8_c1_child").remove();
+        // then move 't8_c2_moved' from 't8_c2' to 't8_c1'.
+        getNode("t8_c1").setAttribute("aria-owns", "t8_c2_moved");
+      };
+
+      this.getID = function test8_getID() {
+        return "Move a node by aria-owns to left within the tree";
+      };
+    }
+
+    /**
+     * Move 't9_c3_moved' node under 't9_c2_moved', and then move 't9_c2_moved'
+     * node by aria-owns (same as test10 but has different aria-owns
+     * ordering), the eventing looks same way as in test10:
+     * reorder for 't9_c1'
+     *   hide for 't9_c1_child'
+     *   show for 't9_c2_moved'
+     * reorder for 't9_c2'
+    *    hide for 't9_c2_child'
+     *   hide for 't9_c2_moved'
+     * reorder for 't9_c3'
+     *   hide for 't9_c3_moved'
+     *
+     * The hide events for 't9_c2_moved' and 't9_c3_moved' should be delivered
+     * before the show event for 't9_c2_moved'.
+     */
+    function test9() {
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, getNode("t9_c1_child")),
+        new invokerChecker(EVENT_HIDE, getNode("t9_c2_child")),
+        new invokerChecker(EVENT_HIDE, "t9_c3_moved"),
+        new invokerChecker(EVENT_HIDE, "t9_c2_moved"),
+        new invokerChecker(EVENT_SHOW, "t9_c2_moved"),
+        new invokerChecker(EVENT_REORDER, "t9_c3"),
+        new invokerChecker(EVENT_REORDER, "t9_c2"),
+        new invokerChecker(EVENT_REORDER, "t9_c1"),
+        new unexpectedInvokerChecker(EVENT_SHOW, "t9_c3_moved"),
+      ];
+
+      this.invoke = function test9_invoke() {
+        // Remove child nodes from 't9_c1' and 't9_c2' containers to give
+        // the event tree a needed structure ('t9_c1' and 't9_c2' nodes go
+        // first in the event tree),
+        getNode("t9_c1_child").remove();
+        getNode("t9_c2_child").remove();
+        // then do aria-owns magic.
+        getNode("t9_c2_moved").setAttribute("aria-owns", "t9_c3_moved");
+        getNode("t9_c1").setAttribute("aria-owns", "t9_c2_moved");
+      };
+
+      this.getID = function test9_getID() {
+        return "Move node #1 by aria-owns and then move node #2 into node #1";
+      };
+    }
+
+    /**
+     * Move a node 't10_c3_moved' by aria-owns under a node 't10_c2_moved',
+     * moved by under 't10_1', so that the eventing looks this way:
+     * reorder for 't10_c1'
+     *   hide for 't10_c1_child'
+     *   show for 't10_c2_moved'
+     * reorder for 't10_c2'
+     *   hide for 't10_c2_child'
+     *   hide for 't10_c2_moved'
+     * reorder for 't10_c3'
+     *   hide for 't10_c3_moved'
+     *
+     * The hide events for 't10_c2_moved' and 't10_c3_moved' should be delivered
+     * before the show event for 't10_c2_moved'.
+     */
+    function test10() {
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, getNode("t10_c1_child")),
+        new invokerChecker(EVENT_HIDE, getNode("t10_c2_child")),
+        new invokerChecker(EVENT_HIDE, getNode("t10_c2_moved")),
+        new invokerChecker(EVENT_HIDE, getNode("t10_c3_moved")),
+        new invokerChecker(EVENT_SHOW, getNode("t10_c2_moved")),
+        new invokerChecker(EVENT_REORDER, "t10_c2"),
+        new invokerChecker(EVENT_REORDER, "t10_c1"),
+        new invokerChecker(EVENT_REORDER, "t10_c3"),
+      ];
+
+      this.invoke = function test10_invoke() {
+        // Remove child nodes from 't10_c1' and 't10_c2' containers to give
+        // the event tree a needed structure ('t10_c1' and 't10_c2' nodes go first
+        // in the event tree),
+        getNode("t10_c1_child").remove();
+        getNode("t10_c2_child").remove();
+        // then do aria-owns stuff.
+        getNode("t10_c1").setAttribute("aria-owns", "t10_c2_moved");
+        getNode("t10_c2_moved").setAttribute("aria-owns", "t10_c3_moved");
+      };
+
+      this.getID = function test10_getID() {
+        return "Move a node by aria-owns into a node moved by aria-owns to left within the tree";
+      };
+    }
+
+    /**
+     * Move a node by aria-owns from right to left in the tree, and then
+     * move its parent too by aria-owns. No hide event should be fired for
+     * original node.
+     */
+    function test11() {
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, getNode("t11_c1_child")),
+        new invokerChecker(EVENT_HIDE, getNode("t11_c2")),
+        new orderChecker(),
+        new asyncInvokerChecker(EVENT_SHOW, "t11_c2_child"),
+        new asyncInvokerChecker(EVENT_SHOW, "t11_c2"),
+        new orderChecker(),
+        new invokerChecker(EVENT_REORDER, "t11"),
+        new unexpectedInvokerChecker(EVENT_HIDE, "t11_c2_child"),
+        new unexpectedInvokerChecker(EVENT_REORDER, "t11_c1"),
+        new unexpectedInvokerChecker(EVENT_REORDER, "t11_c2"),
+        new unexpectedInvokerChecker(EVENT_REORDER, "t11_c3"),
+      ];
+
+      this.invoke = function test11_invoke() {
+        // Remove a node from 't11_c1' container to give the event tree a
+        // desired structure (the 't11_c1' container node goes first in
+        // the event tree),
+        getNode("t11_c1_child").remove();
+        // then move 't11_c2_moved' from 't11_c2' to 't11_c1', and then move
+        // 't11_c2' to 't11_c3'.
+        getNode("t11_c1").setAttribute("aria-owns", "t11_c2_child");
+        getNode("t11_c3").setAttribute("aria-owns", "t11_c2");
+      };
+
+      this.getID = function test11_getID() {
+        return "Move a node by aria-owns to left within the tree";
+      };
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests.
+
+    gA11yEventDumpToConsole = true; // debug stuff
+    // enableLogging("eventTree");
+
+    var gQueue = null;
+    function doTests() {
+      gQueue = new eventQueue();
+
+      gQueue.push(new removeChildNParent("option1", "select1"));
+      gQueue.push(new removeParentNChild("option2", "select2"));
+      gQueue.push(new hideChildNParent("option3", "select3"));
+      gQueue.push(new hideParentNChild("option4", "select4"));
+      gQueue.push(new hideChildNRemoveParent("option5", "select5"));
+      gQueue.push(new hideParentNRemoveChild("option6", "select6"));
+      gQueue.push(new removeChildNHideParent("option7", "select7"));
+      gQueue.push(new removeParentNHideChild("option8", "select8"));
+
+      gQueue.push(new addParentNChild("testContainer", false));
+      gQueue.push(new addParentNChild("testContainer", true));
+      gQueue.push(new showParentNChild("select9", "option9", false));
+      gQueue.push(new showParentNChild("select10", "option10", true));
+      gQueue.push(new showParentNAddChild("select11", false));
+      gQueue.push(new showParentNAddChild("select12", true));
+
+      gQueue.push(new removeGrandChildrenNHideParent("t1_child1", "t1_child2", "t1_parent"));
+      gQueue.push(new test3());
+      gQueue.push(new test4());
+      gQueue.push(new test5());
+      gQueue.push(new test6());
+      gQueue.push(new test7());
+      gQueue.push(new test8());
+      gQueue.push(new test9());
+      gQueue.push(new test10());
+      gQueue.push(new test11());
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=513213"
+     title="coalesce events when new event is appended to the queue">
+    Mozilla Bug 513213
+  </a><br>
+  <a target="_blank"
+     title="Rework accessible tree update code"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=570275">
+    Mozilla Bug 570275
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div id="testContainer">
+    <select id="select1">
+      <option id="option1">option</option>
+    </select>
+    <select id="select2">
+      <option id="option2">option</option>
+    </select>
+    <select id="select3">
+      <option id="option3">option</option>
+    </select>
+    <select id="select4">
+      <option id="option4">option</option>
+    </select>
+    <select id="select5">
+      <option id="option5">option</option>
+    </select>
+    <select id="select6">
+      <option id="option6">option</option>
+    </select>
+    <select id="select7">
+      <option id="option7">option</option>
+    </select>
+    <select id="select8">
+      <option id="option8">option</option>
+    </select>
+
+    <select id="select9" style="display: none">
+      <option id="option9" style="display: none">testing</option>
+    </select>
+    <select id="select10" style="display: none">
+      <option id="option10" style="display: none">testing</option>
+    </select>
+    <select id="select11" style="display: none"></select>
+    <select id="select12" style="display: none"></select>
+  </div>
+
+  <div id="testContainer2">
+    <div id="t1_parent">
+      <div id="t1_mid1"><div id="t1_child1"></div></div>
+      <div id="t1_mid2"><div id="t1_child2"></div></div>
+    </div>
+  </div>
+
+  <div id="t3">
+    <div role="listbox" id="t3_lb">
+      <div role="option" id="t3_o">opt</div>
+    </div>
+  </div>
+
+  <div id="t4">
+    <div role="listbox" id="t4_lb">
+      <div role="option" id="t4_o1">opt1</div>
+      <div role="option" id="t4_o2">opt2</div>
+    </div>
+  </div>
+
+  <div id="t5">
+    <div role="button" id="t5_b">btn</div>
+    <div role="listbox" id="t5_lb">
+      <div role="option" id="t5_o">opt</div>
+    </div>
+  </div>
+
+  <div id="t6">
+  </div>
+
+  <div id="t7">
+    <div id="t7_moveplace"></div>
+    <div id="t7_c">
+      <div><div id="t7_c_grandchild"></div></div>
+      <div id="t7_c_directchild"></div>
+    </div>
+  </div>
+
+  <div id="t8">
+    <div id="t8_c1"><div id="t8_c1_child"></div></div>
+    <div id="t8_c2">
+      <div id="t8_c2_moved"></div>
+    </div>
+  </div>
+
+  <div id="t9">
+    <div id="t9_c1"><div id="t9_c1_child"></div></div>
+    <div id="t9_c2">
+      <div id="t9_c2_child"></div>
+      <div id="t9_c2_moved"></div>
+    </div>
+    <div id="t9_c3">
+      <div id="t9_c3_moved"></div>
+    </div>
+  </div>
+
+  <div id="t10">
+    <div id="t10_c1"><div id="t10_c1_child"></div></div>
+    <div id="t10_c2">
+      <div id="t10_c2_child"></div>
+      <div id="t10_c2_moved"></div>
+    </div>
+    <div id="t10_c3">
+      <div id="t10_c3_moved"></div>
+    </div>
+  </div>
+
+  <div id="t11">
+    <div id="t11_c1"><div id="t11_c1_child"></div></div>
+    <div id="t11_c2"><div id="t11_c2_child"></div></div>
+    <div id="t11_c3"></div>
+  </div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_contextmenu.html b/accessible/tests/mochitest/events/test_contextmenu.html
new file mode 100644
index 0000000000..e729f071e7
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_contextmenu.html
@@ -0,0 +1,131 @@
+<html>
+
+<head>
+  <title>Context menu tests</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    function showContextMenu(aID) {
+      this.DOMNode = getNode(aID);
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_MENUPOPUP_START, getContextMenuNode()),
+      ];
+
+      this.invoke = function showContextMenu_invoke() {
+        synthesizeMouse(this.DOMNode, 4, 4, { type: "contextmenu", button: 2 });
+      };
+
+      this.getID = function showContextMenu_getID() {
+        return "show context menu";
+      };
+    }
+
+    function selectMenuItem() {
+      this.eventSeq = [
+        new invokerChecker(EVENT_FOCUS, getFocusedMenuItem),
+      ];
+
+      this.invoke = function selectMenuItem_invoke() {
+        synthesizeKey("KEY_ArrowDown");
+      };
+
+      this.getID = function selectMenuItem_getID() {
+        return "select first menuitem";
+      };
+    }
+
+    function closeContextMenu(aID) {
+      this.eventSeq = [
+        new invokerChecker(EVENT_MENUPOPUP_END,
+                           getAccessible(getContextMenuNode())),
+      ];
+
+      this.invoke = function closeContextMenu_invoke() {
+        synthesizeKey("KEY_Escape");
+      };
+
+      this.getID = function closeContextMenu_getID() {
+        return "close context menu";
+      };
+    }
+
+    function getContextMenuNode() {
+      return getRootAccessible().DOMDocument.
+        getElementById("contentAreaContextMenu");
+    }
+
+    function getFocusedMenuItem() {
+      var menu = getAccessible(getAccessible(getContextMenuNode()));
+      for (var idx = 0; idx < menu.childCount; idx++) {
+        var item = menu.getChildAt(idx);
+
+        if (hasState(item, STATE_FOCUSED))
+          return getAccessible(item);
+      }
+      return null;
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    var gQueue = null;
+    // gA11yEventDumpID = "eventdump"; // debug stuff
+    // gA11yEventDumpToConsole = true;
+
+    function doTests() {
+      gQueue = new eventQueue();
+
+      gQueue.push(new showContextMenu("input"));
+      gQueue.push(new selectMenuItem());
+      gQueue.push(new closeContextMenu());
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    const {AppConstants} = ChromeUtils.import("resource://gre/modules/AppConstants.jsm");
+    if (AppConstants.platform == "macosx" &&
+        Services.prefs.getBoolPref("widget.macos.native-context-menus", false)) {
+      ok(true, "Native context menus handle accessibility notifications natively and cannot be tested with synthesized key events.");
+    } else {
+      SimpleTest.waitForExplicitFinish();
+      addA11yLoadEvent(doTests);
+    }
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=580535"
+     title="Broken accessibility in context menus">
+    Mozilla Bug 580535
+  </a><br>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <input id="input">
+
+  <div id="eventdump"></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_descrchange.html b/accessible/tests/mochitest/events/test_descrchange.html
new file mode 100644
index 0000000000..1eaecd6b59
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_descrchange.html
@@ -0,0 +1,142 @@
+<html>
+
+<head>
+  <title>Accessible description change event testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+
+  <script type="application/javascript">
+    let PromEvents = {};
+    Services.scriptloader.loadSubScript(
+      "chrome://mochitests/content/a11y/accessible/tests/mochitest/promisified-events.js",
+      PromEvents);
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    function setAttr(aID, aAttr, aValue, aChecker) {
+      this.eventSeq = [ aChecker ];
+      this.invoke = function setAttr_invoke() {
+        getNode(aID).setAttribute(aAttr, aValue);
+      };
+
+      this.getID = function setAttr_getID() {
+        return "set attr '" + aAttr + "', value '" + aValue + "'";
+      };
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    // gA11yEventDumpToConsole = true; // debuggin
+
+    var gQueue = null;
+    async function doTests() {
+      gQueue = new eventQueue();
+      // Later tests use await.
+      let queueFinished = new Promise(resolve => {
+        gQueue.onFinish = function() {
+          resolve();
+          return DO_NOT_FINISH_TEST;
+        };
+      });
+
+      gQueue.push(new setAttr("tst1", "aria-describedby", "display",
+                              new invokerChecker(EVENT_DESCRIPTION_CHANGE, "tst1")));
+      gQueue.push(new setAttr("tst1", "title", "title",
+                              new unexpectedInvokerChecker(EVENT_DESCRIPTION_CHANGE, "tst1")));
+
+      // A title has lower priority over text content. There should be no name change event.
+      gQueue.push(new setAttr("tst2", "title", "title",
+                              new unexpectedInvokerChecker(EVENT_NAME_CHANGE, "tst2")));
+
+      gQueue.invoke();
+      await queueFinished;
+      // Tests beyond this point use await rather than eventQueue.
+
+      const describedBy = getNode("describedBy");
+      const description = getNode("description");
+      let descChanged = PromEvents.waitForEvent(
+        EVENT_DESCRIPTION_CHANGE,
+        describedBy
+      );
+      info("Changing text of aria-describedby target");
+      description.textContent = "d2";
+      await descChanged;
+      descChanged = PromEvents.waitForEvent(
+        EVENT_DESCRIPTION_CHANGE,
+        describedBy
+      );
+      info("Adding node to aria-describedby target");
+      description.innerHTML = '<p id="descriptionChild">d3</p>';
+      await descChanged;
+      descChanged = PromEvents.waitForEvent(
+        EVENT_DESCRIPTION_CHANGE,
+        describedBy
+      );
+      info("Changing text of aria-describedby target's child");
+      getNode("descriptionChild").textContent = "d4";
+      await descChanged;
+
+      const lateDescribedBy = getNode("lateDescribedBy");
+      descChanged = PromEvents.waitForEvent(
+        EVENT_DESCRIPTION_CHANGE,
+        lateDescribedBy
+      );
+      info("Setting aria-describedby");
+      lateDescribedBy.setAttribute("aria-describedby", "lateDescription");
+      await descChanged;
+      descChanged = PromEvents.waitForEvent(
+        EVENT_DESCRIPTION_CHANGE,
+        lateDescribedBy
+      );
+      info("Changing text of late aria-describedby target's child");
+      getNode("lateDescriptionChild").textContent = "d2";
+      await descChanged;
+
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=991969"
+     title="Event not fired when description changes">
+    Bug 991969
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <button id="tst1">btn1</button>
+  <button id="tst2">btn2</button>
+
+  <div id="describedBy" aria-describedby="description"></div>
+  <div id="description">d1</div>
+
+  <div id="lateDescribedBy"></div>
+  <div id="lateDescription"><p id="lateDescriptionChild">d1</p></div>
+
+  <div id="eventdump"></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_dragndrop.html b/accessible/tests/mochitest/events/test_dragndrop.html
new file mode 100644
index 0000000000..2613a310a2
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_dragndrop.html
@@ -0,0 +1,106 @@
+<html>
+
+<head>
+  <title>Accessible drag and drop event testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript"
+          src="../attributes.js"></script>
+
+  <script type="application/javascript">
+
+    /**
+     * Do tests.
+     */
+    var gQueue = null;
+
+    // aria grabbed invoker
+    function changeGrabbed(aNodeOrID, aGrabValue) {
+      this.DOMNode = getNode(aNodeOrID);
+
+      this.invoke = function changeGrabbed_invoke() {
+        if (aGrabValue != undefined) {
+          this.DOMNode.setAttribute("aria-grabbed", aGrabValue);
+        }
+      };
+
+      this.check = function changeGrabbed_check() {
+        testAttrs(aNodeOrID, {"grabbed": aGrabValue}, true);
+      };
+
+      this.getID = function changeGrabbed_getID() {
+        return prettyName(aNodeOrID) + " aria-grabbed changed";
+      };
+    }
+
+    // aria dropeffect invoker
+    function changeDropeffect(aNodeOrID, aDropeffectValue) {
+      this.DOMNode = getNode(aNodeOrID);
+
+      this.invoke = function changeDropeffect_invoke() {
+        if (aDropeffectValue != undefined) {
+          this.DOMNode.setAttribute("aria-dropeffect", aDropeffectValue);
+        }
+      };
+
+      this.check = function changeDropeffect_check() {
+        testAttrs(aNodeOrID, {"dropeffect": aDropeffectValue}, true);
+      };
+
+      this.getID = function changeDropeffect_getID() {
+        return prettyName(aNodeOrID) + " aria-dropeffect changed";
+      };
+    }
+
+    function doTests() {
+      // Test aria attribute mutation events
+      gQueue = new eventQueue(nsIAccessibleEvent.EVENT_OBJECT_ATTRIBUTE_CHANGED);
+
+      let id = "grabbable";
+      gQueue.push(new changeGrabbed(id, "true"));
+      gQueue.push(new changeGrabbed(id, "false"));
+      todo(false, "uncomment this test when 472142 is fixed.");
+      // gQueue.push(new changeGrabbed(id, "undefined"));
+
+      id = "dropregion";
+      gQueue.push(new changeDropeffect(id, "copy"));
+      gQueue.push(new changeDropeffect(id, "execute"));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=510441"
+     title="Add support for nsIAccessibleEvent::OBJECT_ATTRIBUTE_CHANGED">
+    Mozilla Bug 510441
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+  <div id="eventdump"></div>
+
+  <!-- ARIA grabbed -->
+  <div id="grabbable" role="button" aria-grabbed="foo">button</div>
+
+  <!-- ARIA dropeffect -->
+  <div id="dropregion" role="region" aria-dropeffect="none">button</div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_flush.html b/accessible/tests/mochitest/events/test_flush.html
new file mode 100644
index 0000000000..7d7b60b81e
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_flush.html
@@ -0,0 +1,74 @@
+<html>
+
+<head>
+  <title>Flush delayed events testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    SimpleTest.expectAssertions(0, 1);
+
+    var gFocusHandler = {
+      handleEvent(aEvent) {
+        switch (this.count) {
+          case 0:
+            is(aEvent.DOMNode, getNode("input1"),
+               "Focus event for input1 was expected!");
+            getAccessible("input2").takeFocus();
+            break;
+
+          case 1:
+            is(aEvent.DOMNode, getNode("input2"),
+               "Focus event for input2 was expected!");
+
+            unregisterA11yEventListener(EVENT_FOCUS, gFocusHandler);
+            SimpleTest.finish();
+            break;
+
+          default:
+            ok(false, "Wrong focus event!");
+        }
+
+        this.count++;
+      },
+
+      count: 0,
+    };
+
+    function doTests() {
+      registerA11yEventListener(EVENT_FOCUS, gFocusHandler);
+
+      getAccessible("input1").takeFocus();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=477551"
+     title="DocAccessible::FlushPendingEvents isn't robust">
+    Mozilla Bug 477551
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <input id="input1">
+  <input id="input2">
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_focus_aria_activedescendant.html b/accessible/tests/mochitest/events/test_focus_aria_activedescendant.html
new file mode 100644
index 0000000000..661284619a
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_aria_activedescendant.html
@@ -0,0 +1,327 @@
+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=429547
+-->
+<head>
+  <title>aria-activedescendant focus tests</title>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    let PromEvents = {};
+    Services.scriptloader.loadSubScript(
+      "chrome://mochitests/content/a11y/accessible/tests/mochitest/promisified-events.js",
+      PromEvents);
+    // gA11yEventDumpToConsole = true; // debugging
+
+    function changeARIAActiveDescendant(aContainer, aItem, aPrevItemId) {
+      let itemID = Node.isInstance(aItem) ? aItem.id : aItem;
+      this.eventSeq = [new focusChecker(aItem)];
+
+      if (aPrevItemId) {
+        this.eventSeq.push(
+          new stateChangeChecker(EXT_STATE_ACTIVE, true, false, aPrevItemId)
+        );
+      }
+
+      this.eventSeq.push(
+        new stateChangeChecker(EXT_STATE_ACTIVE, true, true, aItem)
+      );
+
+      this.invoke = function changeARIAActiveDescendant_invoke() {
+        getNode(aContainer).setAttribute("aria-activedescendant", itemID);
+      };
+
+      this.getID = function changeARIAActiveDescendant_getID() {
+        return "change aria-activedescendant on " + itemID;
+      };
+    }
+
+    function clearARIAActiveDescendant(aID, aPrevItemId) {
+      this.eventSeq = [
+        new focusChecker(aID),
+      ];
+
+      if (aPrevItemId) {
+        this.eventSeq.push(
+          new stateChangeChecker(EXT_STATE_ACTIVE, true, false, aPrevItemId)
+        );
+      }
+
+      this.invoke = function clearARIAActiveDescendant_invoke() {
+        getNode(aID).removeAttribute("aria-activedescendant");
+      };
+
+      this.getID = function clearARIAActiveDescendant_getID() {
+        return "clear aria-activedescendant on container " + aID;
+      };
+    }
+
+    /**
+     * Change aria-activedescendant to an invalid (non-existent) id.
+     * Ensure that focus is fired on the element itself.
+     */
+    function changeARIAActiveDescendantInvalid(aID, aInvalidID, aPrevItemId) {
+      if (!aInvalidID) {
+        aInvalidID = "invalid";
+      }
+
+      this.eventSeq = [
+        new focusChecker(aID),
+      ];
+
+      if (aPrevItemId) {
+        this.eventSeq.push(
+          new stateChangeChecker(EXT_STATE_ACTIVE, true, false, aPrevItemId)
+        );
+      }
+
+      this.invoke = function changeARIAActiveDescendant_invoke() {
+        getNode(aID).setAttribute("aria-activedescendant", aInvalidID);
+      };
+
+      this.getID = function changeARIAActiveDescendant_getID() {
+        return "change aria-activedescendant to invalid id";
+      };
+    }
+    
+    function insertItemNFocus(aID, aNewItemID, aPrevItemId) {
+      this.eventSeq = [
+        new invokerChecker(EVENT_SHOW, aNewItemID),
+        new focusChecker(aNewItemID),
+      ];
+
+      if (aPrevItemId) {
+        this.eventSeq.push(
+          new stateChangeChecker(EXT_STATE_ACTIVE, true, false, aPrevItemId)
+        );
+      }
+
+      this.eventSeq.push(
+        new stateChangeChecker(EXT_STATE_ACTIVE, true, true, aNewItemID)
+      );
+
+      this.invoke = function insertItemNFocus_invoke() {
+        var container  = getNode(aID);
+
+        var itemNode = document.createElement("div");
+        itemNode.setAttribute("id", aNewItemID);
+        itemNode.setAttribute("role", "listitem");
+        itemNode.textContent = aNewItemID;
+        container.appendChild(itemNode);
+
+        container.setAttribute("aria-activedescendant", aNewItemID);
+      };
+
+      this.getID = function insertItemNFocus_getID() {
+        return "insert new node and focus it with ID: " + aNewItemID;
+      };
+    }
+
+    /**
+     * Change the id of an element to another id which is the target of
+     * aria-activedescendant.
+     * If another element already has the desired id, remove it from that
+     * element first.
+     * Ensure that focus is fired on the target element which was given the
+     * desired id.
+     * @param aFromID The existing id of the target element.
+     * @param aToID The desired id to be given to the target element.
+    */
+    function moveARIAActiveDescendantID(aFromID, aToID) {
+      this.eventSeq = [
+        new focusChecker(aToID),
+        new stateChangeChecker(EXT_STATE_ACTIVE, true, true, aToID),
+      ];
+
+      this.invoke = function moveARIAActiveDescendantID_invoke() {
+        let orig = document.getElementById(aToID);
+        if (orig) {
+          orig.id = "";
+        }
+        document.getElementById(aFromID).id = aToID;
+      };
+
+      this.getID = function moveARIAActiveDescendantID_getID() {
+        return "move aria-activedescendant id " + aToID;
+      };
+    }
+
+    var gQueue = null;
+    async function doTest() {
+      gQueue = new eventQueue();
+      // Later tests use await.
+      let queueFinished = new Promise(resolve => {
+        gQueue.onFinish = function() {
+          resolve();
+          return DO_NOT_FINISH_TEST;
+        };
+      });
+
+      gQueue.push(new synthFocus("listbox", new focusChecker("item1")));
+      gQueue.push(new changeARIAActiveDescendant("listbox", "item2", "item1"));
+      gQueue.push(new changeARIAActiveDescendant("listbox", "item3", "item2"));
+
+      gQueue.push(new synthFocus("combobox_entry", new focusChecker("combobox_entry")));
+      gQueue.push(new changeARIAActiveDescendant("combobox", "combobox_option2"));
+
+      gQueue.push(new synthFocus("listbox", new focusChecker("item3")));
+      gQueue.push(new insertItemNFocus("listbox", "item4", "item3"));
+
+      gQueue.push(new clearARIAActiveDescendant("listbox", "item4"));
+      gQueue.push(new changeARIAActiveDescendant("listbox", "item1"));
+      gQueue.push(new changeARIAActiveDescendantInvalid("listbox", "invalid", "item1"));
+
+      gQueue.push(new changeARIAActiveDescendant("listbox", "roaming"));
+      gQueue.push(new moveARIAActiveDescendantID("roaming2", "roaming"));
+      gQueue.push(new changeARIAActiveDescendantInvalid("listbox", "roaming3", "roaming"));
+      gQueue.push(new moveARIAActiveDescendantID("roaming", "roaming3"));
+
+      gQueue.push(new synthFocus("activedesc_nondesc_input",
+        new focusChecker("activedesc_nondesc_option")));
+
+      let shadowRoot = document.getElementById("shadow").shadowRoot;
+      let shadowListbox = shadowRoot.getElementById("shadowListbox");
+      let shadowItem1 = shadowRoot.getElementById("shadowItem1");
+      let shadowItem2 = shadowRoot.getElementById("shadowItem2");
+      gQueue.push(new synthFocus(shadowListbox, new focusChecker(shadowItem1)));
+      gQueue.push(new changeARIAActiveDescendant(shadowListbox, shadowItem2));
+
+      gQueue.invoke();
+      await queueFinished;
+      // Tests beyond this point use await rather than eventQueue.
+
+      info("Testing simultaneous insertion, relocation and aria-activedescendant");
+      let comboboxWithHiddenList = getNode("comboboxWithHiddenList");
+      let evtProm = PromEvents.waitForEvent(EVENT_FOCUS, comboboxWithHiddenList);
+      comboboxWithHiddenList.focus();
+      await evtProm;
+      testStates(comboboxWithHiddenList, STATE_FOCUSED);
+      // hiddenList is owned, so unhiding causes insertion and relocation.
+      getNode("hiddenList").hidden = false;
+      evtProm = Promise.all([
+        PromEvents.waitForEvent(EVENT_FOCUS, "hiddenListOption"),
+        PromEvents.waitForStateChange("hiddenListOption", EXT_STATE_ACTIVE, true, true),
+      ]);
+      comboboxWithHiddenList.setAttribute("aria-activedescendant", "hiddenListOption");
+      await evtProm;
+      testStates("hiddenListOption", STATE_FOCUSED);
+
+      info("Testing active state changes when not focused");
+      testStates("listbox", 0, 0, STATE_FOCUSED);
+      evtProm = Promise.all([
+        PromEvents.waitForStateChange("roaming3", EXT_STATE_ACTIVE, false, true),
+        PromEvents.waitForStateChange("item1", EXT_STATE_ACTIVE, true, true),
+      ]);
+      getNode("listbox").setAttribute("aria-activedescendant", "item1");
+      await evtProm;
+
+      info("Testing that focus is always fired first");
+      const listbox = getNode("listbox");
+      evtProm = PromEvents.waitForEvent(EVENT_FOCUS, "item1");
+      listbox.focus();
+      await evtProm;
+      const item1 = getNode("item1");
+      evtProm = PromEvents.waitForOrderedEvents([
+        [EVENT_FOCUS, "item2"],
+        [EVENT_NAME_CHANGE, item1],
+      ], "Focus then name change");
+      item1.setAttribute("aria-label", "changed");
+      listbox.setAttribute("aria-activedescendant", "item2");
+      await evtProm;
+
+      info("Setting aria-activedescendant to invalid id on non-focused node");
+      const combobox_entry = getNode("combobox_entry");
+      evtProm = PromEvents.waitForEvents({
+        expected: [[EVENT_FOCUS, combobox_entry]],
+        unexpected: [[EVENT_FOCUS, listbox]],
+      });
+      combobox_entry.focus();
+      listbox.setAttribute("aria-activedescendant", "invalid");
+      await evtProm;
+
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTest);
+  </script>
+</head>
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=429547"
+     title="Support aria-activedescendant usage in nsIAccesible::TakeFocus()">
+    Mozilla Bug 429547
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=761102"
+     title="Focus may be missed when ARIA active-descendant is changed on active composite widget">
+    Mozilla Bug 761102
+  </a>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div role="listbox" aria-activedescendant="item1" id="listbox" tabindex="1"
+       aria-owns="item3">
+    <div role="listitem" id="item1">item1</div>
+    <div role="listitem" id="item2">item2</div>
+    <div role="listitem" id="roaming">roaming</div>
+    <div role="listitem" id="roaming2">roaming2</div>
+  </div>
+  <div role="listitem" id="item3">item3</div>
+
+  <div role="combobox" id="combobox">
+    <input id="combobox_entry">
+    <ul>
+      <li role="option" id="combobox_option1">option1</li>
+      <li role="option" id="combobox_option2">option2</li>
+    </ul>
+  </div>
+
+  <!-- aria-activedescendant targeting a non-descendant -->
+  <input id="activedesc_nondesc_input" aria-activedescendant="activedesc_nondesc_option">
+  <div role="listbox">
+    <div role="option" id="activedesc_nondesc_option">option</div>
+  </div>
+
+  <div id="shadow"></div>
+  <script>
+    let host = document.getElementById("shadow");
+    let shadow = host.attachShadow({mode: "open"});
+    let listbox = document.createElement("div");
+    listbox.id = "shadowListbox";
+    listbox.setAttribute("role", "listbox");
+    listbox.setAttribute("tabindex", "0");
+    shadow.appendChild(listbox);
+    let item = document.createElement("div");
+    item.id = "shadowItem1";
+    item.setAttribute("role", "option");
+    listbox.appendChild(item);
+    listbox.setAttribute("aria-activedescendant", "shadowItem1");
+    item = document.createElement("div");
+    item.id = "shadowItem2";
+    item.setAttribute("role", "option");
+    listbox.appendChild(item);
+  </script>
+
+  <div id="comboboxWithHiddenList" tabindex="0" role="combobox" aria-owns="hiddenList">
+  </div>
+  <div id="hiddenList" hidden role="listbox">
+    <div id="hiddenListOption" role="option"></div>
+  </div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_focus_autocomplete.html b/accessible/tests/mochitest/events/test_focus_autocomplete.html
new file mode 100644
index 0000000000..c179398cc0
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_autocomplete.html
@@ -0,0 +1,83 @@
+<!doctype html>
+
+<head>
+  <title>Form Autocomplete Tests</title>
+
+  <link rel="stylesheet"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script src="../common.js"></script>
+  <script src="../promisified-events.js"></script>
+  <script src="../role.js"></script>
+
+  <script type="application/javascript">
+    const { TestUtils } = ChromeUtils.import(
+      "resource://testing-common/TestUtils.jsm");
+
+    async function waitForFocusOnOptionWithname(name) {
+      let event = await waitForEvent(
+        EVENT_FOCUS,
+        evt => evt.accessible.role == ROLE_COMBOBOX_OPTION
+      );
+      while (!event.accessible.name) {
+        // Sometimes, the name is null for a very short time after the focus
+        // event.
+        await waitForEvent(EVENT_NAME_CHANGE, event.accessible);
+      }
+      is(event.accessible.name, name, "Got focus on option with name " + name);
+    }
+
+    async function doTests() {
+      const input = getNode("input");
+      info("Focusing the input");
+      let focused = waitForEvent(EVENT_FOCUS, input);
+      input.focus();
+      await focused;
+
+      let shown = waitForEvent(EVENT_SHOW, event =>
+        event.accessible.role == ROLE_GROUPING &&
+        event.accessible.firstChild.role == ROLE_COMBOBOX_LIST);
+      info("Pressing ArrowDown to open the popup");
+      synthesizeKey("KEY_ArrowDown");
+      await shown;
+      // The popup still doesn't seem to be ready even once it's fired an a11y
+      // show event!
+      const controller = Cc["@mozilla.org/autocomplete/controller;1"].
+        getService(Ci.nsIAutoCompleteController);
+      info("Waiting for popup to be fully open and ready");
+      await TestUtils.waitForCondition(() => controller.input.popupOpen);
+
+      focused = waitForFocusOnOptionWithname("a");
+      info("Pressing ArrowDown to focus first item");
+      synthesizeKey("KEY_ArrowDown");
+      await focused;
+
+      focused = waitForFocusOnOptionWithname("b");
+      info("Pressing ArrowDown to focus the second item");
+      synthesizeKey("KEY_ArrowDown");
+      await focused;
+
+      focused = waitForEvent(EVENT_FOCUS, input);
+      info("Pressing enter to select the second item");
+      synthesizeKey("KEY_Enter");
+      await focused;
+      is(input.value, "b", "input value filled with second item");
+
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+<body>
+  <input id="input" list="list">
+  <datalist id="list">
+    <option id="a" value="a">
+    <option id="b" value="b">
+  </datalist>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_focus_autocomplete.xhtml b/accessible/tests/mochitest/events/test_focus_autocomplete.xhtml
new file mode 100644
index 0000000000..69cdac14c5
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_autocomplete.xhtml
@@ -0,0 +1,507 @@
+<?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"?>
+
+<!-- Firefox searchbar -->
+<?xml-stylesheet href="chrome://browser/content/browser.css"
+                 type="text/css"?>
+<!-- SeaMonkey searchbar -->
+<?xml-stylesheet href="chrome://navigator/content/navigator.css"
+                 type="text/css"?>
+
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        xmlns:html="http://www.w3.org/1999/xhtml"
+        title="Accessible focus event testing">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"/>
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../role.js" />
+  <script type="application/javascript"
+          src="../states.js" />
+  <script type="application/javascript"
+          src="../events.js" />
+
+  <script type="application/javascript"
+          src="../autocomplete.js" />
+
+  <script type="application/javascript">
+  <![CDATA[
+    ////////////////////////////////////////////////////////////////////////////
+    // Hacky stuffs
+
+    // This is the hacks needed to use a searchbar without browser.js.
+    var BrowserSearch = {
+      updateOpenSearchBadge() {}
+    };
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    function loadFormAutoComplete(aIFrameID)
+    {
+      this.iframeNode = getNode(aIFrameID);
+      this.iframe = getAccessible(aIFrameID);
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_REORDER, this.iframe)
+      ];
+
+      this.invoke = function loadFormAutoComplete_invoke()
+      {
+        var url = "data:text/html,<html><body><form id='form'>" +
+          "<input id='input' name='a11ytest-formautocomplete'>" +
+          "</form></body></html>";
+        this.iframeNode.setAttribute("src", url);
+      }
+
+      this.getID = function loadFormAutoComplete_getID()
+      {
+        return "load form autocomplete page";
+      }
+    }
+
+    function initFormAutoCompleteBy(aIFrameID, aAutoCompleteValue)
+    {
+      this.iframe = getAccessible(aIFrameID);
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_REORDER, this.iframe)
+      ];
+
+      this.invoke = function initFormAutoCompleteBy_invoke()
+      {
+        var iframeDOMDoc = getIFrameDOMDoc(aIFrameID);
+
+        var inputNode = iframeDOMDoc.getElementById("input");
+        inputNode.value = aAutoCompleteValue;
+        var formNode = iframeDOMDoc.getElementById("form");
+        formNode.submit();
+      }
+
+      this.getID = function initFormAutoCompleteBy_getID()
+      {
+        return "init form autocomplete by '" + aAutoCompleteValue + "'";
+      }
+    }
+
+    function loadHTML5ListAutoComplete(aIFrameID)
+    {
+      this.iframeNode = getNode(aIFrameID);
+      this.iframe = getAccessible(aIFrameID);
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_REORDER, this.iframe)
+      ];
+
+      this.invoke = function loadHTML5ListAutoComplete_invoke()
+      {
+        var url = "data:text/html,<html><body>" +
+          "<datalist id='cities'><option>hello</option><option>hi</option></datalist>" +
+          "<input id='input' list='cities'>" +
+          "</body></html>";
+        this.iframeNode.setAttribute("src", url);
+      }
+
+      this.getID = function loadHTML5ListAutoComplete_getID()
+      {
+        return "load HTML5 list autocomplete page";
+      }
+    }
+
+    function removeChar(aID, aCheckerOrEventSeq)
+    {
+      this.__proto__ = new synthAction(aID, aCheckerOrEventSeq);
+
+      this.invoke = function removeChar_invoke()
+      {
+        synthesizeKey("KEY_ArrowLeft", {shiftKey: true});
+        synthesizeKey("KEY_Delete");
+      }
+
+      this.getID = function removeChar_getID()
+      {
+        return "remove char on " + prettyName(aID);
+      }
+    }
+
+    function replaceOnChar(aID, aChar, aCheckerOrEventSeq)
+    {
+      this.__proto__ = new synthAction(aID, aCheckerOrEventSeq);
+
+      this.invoke = function replaceOnChar_invoke()
+      {
+        this.DOMNode.select();
+        sendString(aChar);
+      }
+
+      this.getID = function replaceOnChar_getID()
+      {
+        return "replace on char '" + aChar + "' for" + prettyName(aID);
+      }
+    }
+
+    function focusOnMouseOver(aIDFunc, aIDFuncArg)
+    {
+      this.eventSeq = [ new focusChecker(aIDFunc, aIDFuncArg) ];
+
+      this.invoke = function focusOnMouseOver_invoke()
+      {
+        this.id = aIDFunc(aIDFuncArg);
+        this.node = getNode(this.id);
+        this.window = this.node.ownerGlobal;
+
+        if (this.node.localName == "tree") {
+          var tree = getAccessible(this.node);
+          var accessible = getAccessible(this.id);
+          if (tree != accessible) {
+            var itemX = {}, itemY = {}, treeX = {}, treeY = {};
+            accessible.getBounds(itemX, itemY, {}, {});
+            tree.getBounds(treeX, treeY, {}, {});
+            this.x = itemX.value - treeX.value;
+            this.y = itemY.value - treeY.value;
+          }
+        }
+
+        // Generate mouse move events in timeouts until autocomplete popup list
+        // doesn't have it, the reason is do that because autocomplete popup
+        // ignores mousemove events firing in too short range.
+        synthesizeMouse(this.node, this.x, this.y, { type: "mousemove" });
+        this.doMouseMoveFlood(this);
+      }
+
+      this.finalCheck = function focusOnMouseOver_getID()
+      {
+        this.isFlooding = false;
+      }
+
+      this.getID = function focusOnMouseOver_getID()
+      {
+        return "mouse over on " + prettyName(aIDFunc(aIDFuncArg));
+      }
+
+      this.doMouseMoveFlood = function focusOnMouseOver_doMouseMoveFlood(aThis)
+      {
+        synthesizeMouse(aThis.node, aThis.x + 1, aThis.y + 1,
+                        { type: "mousemove" }, aThis.window);
+
+        if (aThis.isFlooding)
+          aThis.window.setTimeout(aThis.doMouseMoveFlood, 0, aThis);
+      }
+
+      this.id = null;
+      this.node = null;
+      this.window = null;
+
+      this.isFlooding = true;
+      this.x = 1;
+      this.y = 1;
+    }
+
+    function selectByClick(aIDFunc, aIDFuncArg,
+                           aFocusTargetFunc, aFocusTargetFuncArg)
+    {
+      this.eventSeq = [ new focusChecker(aFocusTargetFunc, aFocusTargetFuncArg) ];
+
+      this.invoke = function selectByClick_invoke()
+      {
+        var id = aIDFunc(aIDFuncArg);
+        var node = getNode(id);
+        var targetWindow = node.ownerGlobal;
+
+        if (node.localName == "tree") {
+          var tree = getAccessible(node);
+          var accessible = getAccessible(id);
+          if (tree != accessible) {
+            var itemX = {}, itemY = {}, treeX = {}, treeY = {};
+            accessible.getBounds(itemX, itemY, {}, {});
+            tree.getBounds(treeX, treeY, {}, {});
+            this.x = itemX.value - treeX.value;
+            this.y = itemY.value - treeY.value;
+          }
+        }
+
+        synthesizeMouseAtCenter(node, {}, targetWindow);
+      }
+
+      this.getID = function selectByClick_getID()
+      {
+        return "select by click " + prettyName(aIDFunc(aIDFuncArg));
+      }
+    }
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Target getters
+
+    function getItem(aItemObj)
+    {
+      var autocompleteNode = aItemObj.autocompleteNode;
+
+      // XUL searchbar
+      if (autocompleteNode.localName == "searchbar") {
+        let popupNode = autocompleteNode._popup;
+        if (popupNode) {
+          let list = getAccessible(popupNode);
+          return list.getChildAt(aItemObj.index);
+        }
+      }
+
+      // XUL autocomplete
+      let popupNode = autocompleteNode.popup;
+      if (!popupNode) {
+        // HTML form autocomplete
+        var controller = Cc["@mozilla.org/autocomplete/controller;1"].
+          getService(Ci.nsIAutoCompleteController);
+        popupNode = controller.input.popup;
+      }
+
+      if (popupNode) {
+        if ("richlistbox" in popupNode) {
+          let list = getAccessible(popupNode.richlistbox);
+          return list.getChildAt(aItemObj.index);
+        }
+
+        let list = getAccessible(popupNode.tree);
+        return list.getChildAt(aItemObj.index + 1);
+      }
+      return null;
+    }
+
+    function getTextEntry(aID)
+    {
+      // For form autocompletes the autocomplete widget and text entry widget
+      // is the same widget, for XUL autocompletes the text entry is a first
+      // child.
+      var localName = getNode(aID).localName;
+
+      // HTML form autocomplete
+      if (localName == "input")
+        return getAccessible(aID);
+
+      // XUL searchbar
+      if (localName == "searchbar")
+        return getAccessible(getNode(aID).textbox);
+
+      return null;
+    }
+
+    function itemObj(aID, aIdx)
+    {
+      this.autocompleteNode = getNode(aID);
+
+      this.autocomplete = this.autocompleteNode.localName == "searchbar" ?
+        getAccessible(this.autocompleteNode.textbox) :
+        getAccessible(this.autocompleteNode);
+
+      this.index = aIdx;
+    }
+
+    function getIFrameDOMDoc(aIFrameID)
+    {
+      return getNode(aIFrameID).contentDocument;
+    }
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Test helpers
+
+    function queueAutoCompleteTests(aID)
+    {
+      // focus autocomplete text entry
+      gQueue.push(new synthFocus(aID, new focusChecker(getTextEntry, aID)));
+
+      // open autocomplete popup
+      gQueue.push(new synthDownKey(aID, new nofocusChecker()));
+
+      // select second option ('hi' option), focus on it
+      gQueue.push(new synthUpKey(aID,
+                                 new focusChecker(getItem, new itemObj(aID, 1))));
+
+      // choose selected option, focus on text entry
+      gQueue.push(new synthEnterKey(aID, new focusChecker(getTextEntry, aID)));
+
+      // remove char, autocomplete popup appears
+      gQueue.push(new removeChar(aID, new nofocusChecker()));
+
+      // select first option ('hello' option), focus on it
+      gQueue.push(new synthDownKey(aID,
+                                   new focusChecker(getItem, new itemObj(aID, 0))));
+
+      // mouse move on second option ('hi' option), focus on it
+      gQueue.push(new focusOnMouseOver(getItem, new itemObj(aID, 1)));
+
+      // autocomplete popup updated (no selected item), focus on textentry
+      gQueue.push(new synthKey(aID, "e", null, new focusChecker(getTextEntry, aID)));
+
+      // select first option ('hello' option), focus on it
+      gQueue.push(new synthDownKey(aID,
+                                   new focusChecker(getItem, new itemObj(aID, 0))));
+
+      // popup gets hidden, focus on textentry
+      gQueue.push(new synthRightKey(aID, new focusChecker(getTextEntry, aID)));
+
+      // popup gets open, no focus
+      gQueue.push(new synthOpenComboboxKey(aID, new nofocusChecker()));
+
+      // select first option again ('hello' option), focus on it
+      gQueue.push(new synthDownKey(aID,
+                                   new focusChecker(getItem, new itemObj(aID, 0))));
+
+      // no option is selected, focus on text entry
+      gQueue.push(new synthUpKey(aID, new focusChecker(getTextEntry, aID)));
+
+      // close popup, no focus
+      gQueue.push(new synthEscapeKey(aID, new nofocusChecker()));
+
+      // autocomplete popup appears (no selected item), focus stays on textentry
+      gQueue.push(new replaceOnChar(aID, "h", new nofocusChecker()));
+
+      // mouse move on first option ('hello' option), focus on it
+      gQueue.push(new focusOnMouseOver(getItem, new itemObj(aID, 0)));
+
+      // click first option ('hello' option), popup closes, focus on text entry
+      gQueue.push(new selectByClick(getItem, new itemObj(aID, 0), getTextEntry, aID));
+    }
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Tests
+
+    //gA11yEventDumpToConsole = true; // debug stuff
+
+    var gInitQueue = null;
+    function initTests()
+    {
+      if (SEAMONKEY || MAC) {
+        todo(false, "Skipping this test on SeaMonkey ftb. (Bug 718237), and on Mac (bug 746177)");
+        shutdownAutoComplete();
+        SimpleTest.finish();
+        return;
+      }
+
+      gInitQueue = new eventQueue();
+      gInitQueue.push(new loadFormAutoComplete("iframe"));
+      gInitQueue.push(new initFormAutoCompleteBy("iframe", "hello"));
+      gInitQueue.push(new initFormAutoCompleteBy("iframe", "hi"));
+      gInitQueue.push(new loadHTML5ListAutoComplete("iframe2"));
+      gInitQueue.onFinish = function initQueue_onFinish()
+      {
+        SimpleTest.executeSoon(doTests);
+        return DO_NOT_FINISH_TEST;
+      }
+      gInitQueue.invoke();
+    }
+
+    var gQueue = null;
+    function doTests()
+    {
+      // Test focus events.
+      gQueue = new eventQueue();
+
+      ////////////////////////////////////////////////////////////////////////////
+      // tree popup autocomplete tests
+      queueAutoCompleteTests("autocomplete");
+
+      ////////////////////////////////////////////////////////////////////////////
+      // richlistbox popup autocomplete tests
+      queueAutoCompleteTests("richautocomplete");
+
+      ////////////////////////////////////////////////////////////////////////////
+      // HTML form autocomplete tests
+      queueAutoCompleteTests(getIFrameDOMDoc("iframe").getElementById("input"));
+
+      ////////////////////////////////////////////////////////////////////////////
+      // HTML5 list autocomplete tests
+      queueAutoCompleteTests(getIFrameDOMDoc("iframe2").getElementById("input"));
+
+      ////////////////////////////////////////////////////////////////////////////
+      // searchbar tests
+
+      // focus searchbar, focus on text entry
+      gQueue.push(new synthFocus("searchbar",
+                                 new focusChecker(getTextEntry, "searchbar")));
+      // open search engine popup, no focus
+      gQueue.push(new synthOpenComboboxKey("searchbar", new nofocusChecker()));
+      // select first item, focus on it
+      gQueue.push(new synthDownKey("searchbar",
+                                   new focusChecker(getItem, new itemObj("searchbar", 0))));
+      // mouse over on second item, focus on it
+      gQueue.push(new focusOnMouseOver(getItem, new itemObj("searchbar", 1)));
+      // press enter key, focus on text entry
+      gQueue.push(new synthEnterKey("searchbar",
+                                    new focusChecker(getTextEntry, "searchbar")));
+      // click on search button, open popup, focus goes to document
+      var searchBtn = getAccessible(getNode("searchbar").searchButton);
+      gQueue.push(new synthClick(searchBtn, new focusChecker(document)));
+      // select first item, focus on it
+      gQueue.push(new synthDownKey("searchbar",
+                                   new focusChecker(getItem, new itemObj("searchbar", 0))));
+      // close popup, focus goes on document
+      gQueue.push(new synthEscapeKey("searchbar", new focusChecker(document)));
+
+      gQueue.onFinish = function()
+      {
+        // unregister 'test-a11y-search' autocomplete search
+        shutdownAutoComplete();
+      }
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+
+    // Register 'test-a11y-search' autocomplete search.
+    // XPFE AutoComplete needs to register early.
+    initAutoComplete([ "hello", "hi" ],
+                     [ "Beep beep'm beep beep yeah", "Baby you can drive my car" ]);
+
+    addA11yLoadEvent(initTests);
+  ]]>
+  </script>
+
+  <hbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=383759"
+         title="Focus event inconsistent for search box autocomplete">
+        Mozilla Bug 383759
+      </a>
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=673958"
+         title="Rework accessible focus handling">
+        Mozilla Bug 673958
+      </a>
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=559766"
+         title="Add accessibility support for @list on HTML input and for HTML datalist">
+        Mozilla Bug 559766
+      </a>
+      <p id="display"></p>
+      <div id="content" style="display: none"></div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <vbox flex="1">
+      <html:input is="autocomplete-input"
+                  id="autocomplete"
+                  autocompletesearch="test-a11y-search"/>
+
+      <html:input is="autocomplete-input"
+                  id="richautocomplete"
+                  autocompletesearch="test-a11y-search"
+                  autocompletepopup="richpopup"/>
+      <panel is="autocomplete-richlistbox-popup"
+             id="richpopup"
+             type="autocomplete-richlistbox"
+             noautofocus="true"/>
+
+      <iframe id="iframe"/>
+
+      <iframe id="iframe2"/>
+
+      <searchbar id="searchbar"/>
+    </vbox>
+  </hbox>
+</window>
diff --git a/accessible/tests/mochitest/events/test_focus_canvas.html b/accessible/tests/mochitest/events/test_focus_canvas.html
new file mode 100644
index 0000000000..e2464e41a6
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_canvas.html
@@ -0,0 +1,58 @@
+<html>
+
+<head>
+  <title>Accessible focus testing in canvas subdom</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+
+  <script type="application/javascript">
+    // gA11yEventDumpToConsole = true;
+
+    var gQueue = null;
+    function doTests() {
+      gQueue = new eventQueue();
+
+      gQueue.push(new synthFocus("button"));
+      gQueue.push(new synthTab("button", new focusChecker("textbox")));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+  <a target="_blank"
+     title="Expose content in Canvas element"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=495912">
+    Mozilla Bug 495912
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <canvas>
+    <input id="button" type="button">
+    <input id="textbox">
+  </canvas>
+
+  <div id="eventdump"></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_focus_contextmenu.xhtml b/accessible/tests/mochitest/events/test_focus_contextmenu.xhtml
new file mode 100644
index 0000000000..a0c92212dc
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_contextmenu.xhtml
@@ -0,0 +1,98 @@
+<?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 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        title="Context menu focus testing">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"/>
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../role.js" />
+  <script type="application/javascript"
+          src="../states.js" />
+  <script type="application/javascript"
+          src="../events.js" />
+
+  <script type="application/javascript">
+    //gA11yEventDumpID = "eventdump"; // debug stuff
+    //gA11yEventDumpToConsole = true; // debug stuff
+    
+    var winLowerThanVista = navigator.platform.indexOf("Win") == 0;
+    if (winLowerThanVista) {
+      var version = Services.sysinfo.getProperty("version");
+      version = parseFloat(version);
+      winLowerThanVista = !(version >= 6.0);
+    }
+
+    var gQueue = null;
+    function doTests()
+    {
+      // bug 746183 - Whole file times out on OS X
+      if (MAC || winLowerThanVista) {
+        todo(false, "Reenable on mac after fixing bug 746183!");
+        SimpleTest.finish();
+        return;
+      }
+
+      // Test focus events.
+      gQueue = new eventQueue();
+
+      gQueue.push(new synthFocus("button"));
+      gQueue.push(new synthContextMenu("button", [
+        new invokerChecker(EVENT_MENUPOPUP_START, "contextmenu"),
+        new invokerChecker("popupshown", "contextmenu"),
+      ]));
+      gQueue.push(new synthDownKey("button", new focusChecker("item1")));
+      gQueue.push(new synthEscapeKey("contextmenu", new focusChecker("button")));
+
+      gQueue.push(new synthContextMenu("button",
+                                       new invokerChecker(EVENT_MENUPOPUP_START, "contextmenu")));
+      gQueue.push(new synthDownKey("contextmenu", new focusChecker("item1")));
+      gQueue.push(new synthDownKey("item1", new focusChecker("item2")));
+      gQueue.push(new synthRightKey("item2", new focusChecker("item2.1")));
+      if (WIN) {
+        todo(false, "synthEscapeKey for item2.1 and item2 disabled due to bug 691580");
+      } else {
+        gQueue.push(new synthEscapeKey("item2.1", new focusChecker("item2")));
+        gQueue.push(new synthEscapeKey("item2", new focusChecker("button")));
+      }
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+
+  <hbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=673958"
+         title="Rework accessible focus handling">
+        Mozilla Bug 673958
+      </a>
+      <p id="display"></p>
+      <div id="content" style="display: none"></div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <vbox flex="1">
+      <button id="button" context="contextmenu" label="button"/>
+      <menupopup id="contextmenu">
+        <menuitem id="item1" label="item1"/>
+        <menu id="item2" label="item2">
+          <menupopup>
+            <menuitem id="item2.1" label="item2.1"/>
+          </menupopup>
+        </menu>
+      </menupopup>
+
+      <vbox id="eventdump"/>
+    </vbox>
+  </hbox>
+</window>
diff --git a/accessible/tests/mochitest/events/test_focus_controls.html b/accessible/tests/mochitest/events/test_focus_controls.html
new file mode 100644
index 0000000000..4d25e78908
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_controls.html
@@ -0,0 +1,76 @@
+<html>
+
+<head>
+  <title>Accessible focus testing on HTML controls</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+
+  <script type="application/javascript">
+    // gA11yEventDumpToConsole = true;
+
+    var gQueue = null;
+    function doTests() {
+      gQueue = new eventQueue(EVENT_FOCUS);
+
+      gQueue.push(new synthFocus("textbox"));
+      gQueue.push(new synthFocus("textarea"));
+      gQueue.push(new synthFocus("button1"));
+      gQueue.push(new synthFocus("button2"));
+      gQueue.push(new synthFocus("checkbox"));
+      gQueue.push(new synthFocus("radio1"));
+      gQueue.push(new synthDownKey("radio1", new focusChecker("radio2")));
+
+      // no focus events for checkbox or radio inputs when they are checked
+      // programmatically
+      gQueue.push(new changeCurrentItem("checkbox"));
+      gQueue.push(new changeCurrentItem("radio1"));
+
+      let fileBrowseButton = getAccessible("file").firstChild;
+      gQueue.push(new synthFocus("file", new focusChecker(fileBrowseButton)));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=673958"
+     title="Rework accessible focus handling">
+    Mozilla Bug 673958
+  </a>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <input id="textbox">
+  <textarea id="textarea"></textarea>
+
+  <input id="button1" type="button" value="button">
+  <button id="button2">button</button>
+  <input id="checkbox" type="checkbox">
+  <input id="radio1" type="radio" name="radiogroup">
+  <input id="radio2" type="radio" name="radiogroup">
+  <input id="file" type="file">
+
+  <div id="eventdump"></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_focus_doc.html b/accessible/tests/mochitest/events/test_focus_doc.html
new file mode 100644
index 0000000000..a35fc06ed0
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_doc.html
@@ -0,0 +1,92 @@
+<html>
+
+<head>
+  <title>Accessible document focus event testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+      src="../common.js"></script>
+  <script type="application/javascript"
+    src="../events.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+    <script type="application/javascript"
+      src="../states.js"></script>
+
+  <script type="application/javascript">
+    var gQueue = null;
+
+    // var gA11yEventDumpID = "eventdump";
+    // gA11yEventDumpToConsole = true;
+
+    function doTests() {
+      // setup
+      var frameDoc = document.getElementById("iframe").contentDocument;
+      frameDoc.designMode = "on";
+      var frameDocAcc = getAccessible(frameDoc, [nsIAccessibleDocument]);
+      var buttonAcc = getAccessible("b1");
+
+      var frame2Doc = document.getElementById("iframe2").contentDocument;
+      var frame2Input = frame2Doc.getElementById("input");
+      var frame2DocAcc = getAccessible(frame2Doc);
+      var frame2InputAcc = getAccessible(frame2Input);
+
+      // Test focus events.
+      gQueue = new eventQueue();
+
+      // try to give focus to contentEditable frame twice to cover bug 512059
+      gQueue.push(new synthFocus(buttonAcc));
+      gQueue.push(new synthTab(frameDocAcc, new focusChecker(frameDocAcc)));
+      gQueue.push(new synthFocus(buttonAcc));
+      gQueue.push(new synthTab(frameDocAcc, new focusChecker(frameDocAcc)));
+
+      // focus on not editable document
+      gQueue.push(new synthFocus(frame2InputAcc));
+      gQueue.push(new synthShiftTab(frame2DocAcc, new focusChecker(frame2DocAcc)));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+    href="https://bugzilla.mozilla.org/show_bug.cgi?id=512058"
+    title="Can't set focus to designMode document via accessibility APIs">
+   Mozilla Bug 512058
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=512059"
+     title="Accessibility focus event never fired for designMode document after the first focus">
+    Mozilla Bug 512059
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=618046"
+     title="No focus change event when Shift+Tab at top of screen">
+    Mozilla Bug 618046
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div id="eventdump"></div>
+
+  <div id="testContainer">
+  <button id="b1">a button</button>
+  <iframe id="iframe" src="about:blank"></iframe>
+  <button id="b2">a button</button>
+  <iframe id="iframe2" src="data:text/html,<html><input id='input'></html>"></iframe>
+  </div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_focus_general.html b/accessible/tests/mochitest/events/test_focus_general.html
new file mode 100644
index 0000000000..6919ed8860
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_general.html
@@ -0,0 +1,176 @@
+<html>
+
+<head>
+  <title>Accessible focus testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+
+  <script type="application/javascript">
+    function focusElmWhileSubdocIsFocused(aID) {
+      this.DOMNode = getNode(aID);
+
+      this.invoke = function focusElmWhileSubdocIsFocused_invoke() {
+        this.DOMNode.focus();
+      };
+
+      this.eventSeq = [
+        new focusChecker(this.DOMNode),
+      ];
+
+      this.unexpectedEventSeq = [
+        new invokerChecker(EVENT_FOCUS, this.DOMNode.ownerDocument),
+      ];
+
+      this.getID = function focusElmWhileSubdocIsFocused_getID() {
+        return "Focus element while subdocument is focused " + prettyName(aID);
+      };
+    }
+
+    function imageMapChecker(aID) {
+      var node = getNode(aID);
+      this.type = EVENT_FOCUS;
+      this.match = function imageMapChecker_match(aEvent) {
+        return aEvent.DOMNode == node;
+      };
+    }
+
+    function topMenuChecker() {
+      this.type = EVENT_FOCUS;
+      this.match = function topMenuChecker_match(aEvent) {
+        return aEvent.accessible.role == ROLE_PARENT_MENUITEM;
+      };
+    }
+
+    function contextMenuChecker() {
+      this.type = EVENT_MENUPOPUP_START;
+      this.match = function contextMenuChecker_match(aEvent) {
+        return aEvent.accessible.role == ROLE_MENUPOPUP;
+      };
+    }
+
+    function focusContextMenuItemChecker() {
+      this.__proto__ = new focusChecker();
+
+      this.match = function focusContextMenuItemChecker_match(aEvent) {
+        return aEvent.accessible.role == ROLE_MENUITEM;
+      };
+    }
+
+    /**
+     * Do tests.
+     */
+
+    // gA11yEventDumpID = "eventdump"; // debug stuff
+    // gA11yEventDumpToConsole = true;
+
+    var gQueue = null;
+
+    function doTests() {
+      var frameDoc = document.getElementById("iframe").contentDocument;
+
+      var editableDoc = document.getElementById("editabledoc").contentDocument;
+      editableDoc.designMode = "on";
+
+      gQueue = new eventQueue();
+
+      gQueue.push(new synthFocus("editablearea"));
+      gQueue.push(new synthFocus("navarea"));
+      gQueue.push(new synthTab("navarea", new focusChecker(frameDoc)));
+      gQueue.push(new focusElmWhileSubdocIsFocused("link"));
+
+      gQueue.push(new synthTab(editableDoc, new focusChecker(editableDoc)));
+      if (WIN || LINUX) {
+        // Alt key is used to active menubar and focus menu item on Windows,
+        // other platforms requires setting a ui.key.menuAccessKeyFocuses
+        // preference.
+        gQueue.push(new toggleTopMenu(editableDoc, new topMenuChecker()));
+        gQueue.push(new toggleTopMenu(editableDoc, new focusChecker(editableDoc)));
+      }
+      if (!(MAC && Services.prefs.getBoolPref("widget.macos.native-context-menus", false))) {
+        // Context menu accessibility is handled natively and not testable when
+        // native context menus are used on macOS.
+        gQueue.push(new synthContextMenu(editableDoc, new contextMenuChecker()));
+        gQueue.push(new synthDownKey(editableDoc, new focusContextMenuItemChecker()));
+        gQueue.push(new synthEscapeKey(editableDoc, new focusChecker(editableDoc)));
+      } else {
+        // If this test is run as part of multiple tests, it is displayed in the test harness iframe.
+        // In the non-native context menu case, right-clicking the editableDoc causes the editableDoc
+        // to scroll fully into view, and as a side-effect, the img below it ends up on the screen.
+        // When we're skipping the context menu check, scroll img onto the screen manually, because
+        // otherwise it may remain out-of-view and clipped by the test harness iframe.
+        var img = document.querySelector("img");
+        gQueue.push(new scrollIntoView(img, new nofocusChecker(img)));
+      }
+      if (SEAMONKEY) {
+        todo(false, "shift tab from editable document fails on (Windows) SeaMonkey! (Bug 718235)");
+      } else if (LINUX || MAC) {
+        todo(false, "shift tab from editable document fails on linux and Mac, bug 746519!");
+      } else {
+        gQueue.push(new synthShiftTab("link", new focusChecker("link")));
+      } // ! SEAMONKEY
+
+      gQueue.push(new synthFocus("a", new imageMapChecker("a")));
+      gQueue.push(new synthFocus("b", new imageMapChecker("b")));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=352220"
+     title="Inconsistent focus events when returning to a document frame">
+    Mozilla Bug 352220
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=550338"
+     title="Broken focus when returning to editable documents from menus">
+    Mozilla Bug 550338
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=673958"
+     title="Rework accessible focus handling">
+    Mozilla Bug 673958
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=961696"
+     title="Accessible object:state-changed:focused events for imagemap links are broken">
+    Mozilla Bug 961696
+  </a>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div id="editablearea" contentEditable="true">editable area</div>
+  <div id="navarea" tabindex="0">navigable area</div>
+  <iframe id="iframe" src="data:text/html,<html></html>"></iframe>
+  <a id="link" href="">link</a>
+  <iframe id="editabledoc" src="about:blank"></iframe>
+
+  <map name="atoz_map">
+    <area id="a" coords="0,0,13,14" shape="rect">
+    <area id="b" coords="17,0,30,14" shape="rect">
+  </map>
+  <img width="447" height="15" usemap="#atoz_map" src="../letters.gif">
+
+  <div id="eventdump"></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_focus_general.xhtml b/accessible/tests/mochitest/events/test_focus_general.xhtml
new file mode 100644
index 0000000000..c446359b32
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_general.xhtml
@@ -0,0 +1,124 @@
+<?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 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        xmlns:html="http://www.w3.org/1999/xhtml"
+        title="Accessible focus event testing">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"/>
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../role.js" />
+  <script type="application/javascript"
+          src="../states.js" />
+  <script type="application/javascript"
+          src="../events.js" />
+
+  <script type="application/javascript">
+    //gA11yEventDumpID = "eventdump"; // debug stuff
+    //gA11yEventDumpToConsole = true; // debug stuff
+
+    var gQueue = null;
+    function doTests()
+    {
+      // Test focus events.
+      gQueue = new eventQueue();
+
+      gQueue.push(new synthFocus("textbox",
+                                 new focusChecker(getNode("textbox"))));
+      gQueue.push(new synthFocusOnFrame("editabledoc"));
+      gQueue.push(new synthFocus("radioclothes",
+                                 new focusChecker("radiosweater")));
+      gQueue.push(new synthDownKey("radiosweater",
+                                   new focusChecker("radiojacket")));
+      gQueue.push(new synthFocus("checkbox"));
+      gQueue.push(new synthFocus("button"));
+      gQueue.push(new synthFocus("checkbutton"));
+      gQueue.push(new synthFocus("radiobutton"));
+
+      // focus menubutton
+      gQueue.push(new synthFocus("menubutton"));
+      // click menubutton, open popup, focus stays on menu button
+      gQueue.push(new synthClick("menubutton", new nofocusChecker()));
+      // select first menu item ("item 1"), focus on menu item
+      gQueue.push(new synthDownKey("menubutton", new focusChecker("mb_item1")));
+      // choose select menu item, focus gets back to menubutton
+      gQueue.push(new synthEnterKey("mb_item1", new focusChecker("menubutton")));
+      // press enter to open popup, focus stays on menubutton
+      gQueue.push(new synthEnterKey("menubutton", new nofocusChecker()));
+      // select second menu item ("item 2"), focus on menu item
+      gQueue.push(new synthUpKey("menubutton", new focusChecker("mb_item2")));
+      // close the popup
+      gQueue.push(new synthEscapeKey("menubutton", new focusChecker("menubutton")));
+
+      // clicking on button having associated popup doesn't change focus
+      gQueue.push(new synthClick("popupbutton", [
+        new nofocusChecker(),
+        new invokerChecker("popupshown", "backpopup")
+      ]));
+
+      // select first menu item ("item 1"), focus on menu item
+      gQueue.push(new synthDownKey("popupbutton", new focusChecker("bp_item1")));
+      // choose select menu item, focus gets back to menubutton
+      gQueue.push(new synthEnterKey("bp_item1", new focusChecker("menubutton")));
+      // show popup again for the next test
+      gQueue.push(new synthClick("popupbutton", new nofocusChecker()));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+
+  <hbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=552368"
+         title=" fire focus event on document accessible whenever the root or body element is focused">
+        Mozilla Bug 552368
+      </a>
+      <p id="display"></p>
+      <div id="content" style="display: none"></div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <vbox flex="1">
+      <html:input id="textbox" value="hello"/>
+      <iframe id="editabledoc" src="focus.html"/>
+      <radiogroup id="radioclothes">
+        <radio id="radiosweater" label="radiosweater"/>
+        <radio id="radiocap" label="radiocap" disabled="true"/>
+        <radio id="radiojacket" label="radiojacket"/>
+      </radiogroup>
+      <checkbox id="checkbox" label="checkbox"/>
+      <button id="button" label="button"/>
+
+      <button id="menubutton" type="menu" label="menubutton">
+        <menupopup>
+          <menuitem id="mb_item1" label="item1"/>
+          <menuitem id="mb_item2" label="item2"/>
+        </menupopup>
+      </button>
+
+      <button id="checkbutton" type="checkbox" label="checkbutton"/>
+      <button id="radiobutton" type="radio" group="rbgroup" label="radio1"/>
+
+      <popupset>
+        <menupopup id="backpopup" position="after_start">
+          <menuitem id="bp_item1" label="Page 1"/>
+          <menuitem id="bp_item2" label="Page 2"/>
+        </menupopup>
+      </popupset>
+      <button id="popupbutton" label="Pop Me Up" popup="backpopup"/>
+
+      <vbox id="eventdump"/>
+    </vbox>
+  </hbox>
+</window>
diff --git a/accessible/tests/mochitest/events/test_focus_listcontrols.xhtml b/accessible/tests/mochitest/events/test_focus_listcontrols.xhtml
new file mode 100644
index 0000000000..848657d3b3
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_listcontrols.xhtml
@@ -0,0 +1,153 @@
+<?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 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        title="Accessible focus event testing">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"/>
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../role.js" />
+  <script type="application/javascript"
+          src="../states.js" />
+  <script type="application/javascript"
+          src="../events.js" />
+
+  <script type="application/javascript">
+    let PromEvents = {};
+    Services.scriptloader.loadSubScript(
+      "chrome://mochitests/content/a11y/accessible/tests/mochitest/promisified-events.js",
+      PromEvents);
+    //gA11yEventDumpID = "eventdump"; // debug stuff
+    gA11yEventDumpToConsole = true; // debug stuff
+
+    var gQueue = null;
+    async function doTests()
+    {
+      // Test focus events.
+      gQueue = new eventQueue();
+      // Later tests use await.
+      let queueFinished = new Promise(resolve => {
+        gQueue.onFinish = function() {
+          resolve();
+          return DO_NOT_FINISH_TEST;
+        };
+      });
+
+      gQueue.push(new synthFocus("richlistbox", new focusChecker("rlb_item1")));
+      gQueue.push(new synthDownKey("rlb_item1", new focusChecker("rlb_item2")));
+      gQueue.push(new synthFocus("multiselrichlistbox", new focusChecker("msrlb_item1")));
+      gQueue.push(new synthDownKey("msrlb_item1", new focusChecker("msrlb_item2"), { shiftKey: true }));
+      gQueue.push(new synthFocus("emptyrichlistbox", new focusChecker("emptyrichlistbox")));
+
+      gQueue.push(new synthFocus("menulist"));
+      gQueue.push(new synthClick("menulist", new focusChecker("ml_tangerine"),
+        { where: "center" }));
+      gQueue.push(new synthDownKey("ml_tangerine", new focusChecker("ml_marmalade")));
+      gQueue.push(new synthEscapeKey("ml_marmalade", new focusChecker("menulist")));
+
+      // On Windows, items get selected during navigation.
+      let expectedItem = WIN ? "ml_strawberry" : "ml_marmalade";
+      gQueue.push(new synthDownKey("menulist", new nofocusChecker(expectedItem)));
+      gQueue.push(new synthOpenComboboxKey("menulist", new focusChecker(expectedItem)));
+      gQueue.push(new synthEnterKey(expectedItem, new focusChecker("menulist")));
+
+      // no focus events for unfocused list controls when current item is
+      // changed.
+      gQueue.push(new synthFocus("emptyrichlistbox"));
+
+      gQueue.push(new changeCurrentItem("richlistbox", "rlb_item1"));
+      gQueue.push(new changeCurrentItem("menulist", WIN ? "ml_marmalade" : "ml_tangerine"));
+
+      gQueue.invoke();
+      await queueFinished;
+      // Tests beyond this point use await rather than eventQueue.
+
+      // When a menulist contains something other than XUL menuitems, we need
+      // to manage focus with aria-activedescendant.
+      info("Testing opening a menupopup with aria-activedescendant");
+      let popupDiv1 = getNode("menupopup_ad_div1");
+      let focused = PromEvents.waitForEvent(EVENT_FOCUS, popupDiv1);
+      let popup = getNode("menupopup_ad");
+      popup.openPopup();
+      await focused;
+      info("Testing removal of previous active descendant + setting new active descendant");
+      focused = PromEvents.waitForEvent(EVENT_FOCUS, "menupopup_ad_div2");
+      popupDiv1.remove();
+      popup.setAttribute("aria-activedescendant", "menupopup_ad_div2");
+      await focused;
+      popup.hidePopup();
+
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+
+  <hbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=433418"
+         title="Accessibles for focused HTML Select elements are not getting focused state">
+        Mozilla Bug 433418
+      </a>
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=474893"
+         title="List controls should fire a focus event on the selected child when tabbing or when the selected child changes while the list is focused">
+        Mozilla Bug 474893
+      </a>
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=552368"
+         title=" fire focus event on document accessible whenever the root or body element is focused">
+        Mozilla Bug 552368
+      </a>
+      <p id="display"></p>
+      <div id="content" style="display: none"></div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <vbox flex="1">
+      <richlistbox id="richlistbox">
+        <richlistitem id="rlb_item1">
+          <description>A XUL Description!</description>
+        </richlistitem>
+        <richlistitem id="rlb_item2">
+          <button label="A XUL Button"/>
+        </richlistitem>
+      </richlistbox>
+      <richlistbox id="multiselrichlistbox" seltype="multiple">
+        <richlistitem id="msrlb_item1">
+          <description>A XUL Description!</description>
+        </richlistitem>
+        <richlistitem id="msrlb_item2">
+          <button label="A XUL Button"/>
+        </richlistitem>
+      </richlistbox>
+      <richlistbox id="emptyrichlistbox" seltype="multiple"/>
+
+      <menulist id="menulist">
+        <menupopup>
+          <menuitem id="ml_tangerine" label="tangerine trees"/>
+          <menuitem id="ml_marmalade" label="marmalade skies"/>
+          <menuitem id="ml_strawberry" label="strawberry fields"/>
+        </menupopup>
+      </menulist>
+
+      <menulist>
+        <menupopup id="menupopup_ad" aria-activedescendant="menupopup_ad_div1">
+          <div id="menupopup_ad_div1" role="option"></div>
+          <div id="menupopup_ad_div2" role="option"></div>
+        </menupopup>
+      </menulist>
+
+      <vbox id="eventdump"/>
+    </vbox>
+  </hbox>
+</window>
diff --git a/accessible/tests/mochitest/events/test_focus_menu.xhtml b/accessible/tests/mochitest/events/test_focus_menu.xhtml
new file mode 100644
index 0000000000..dda10517eb
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_menu.xhtml
@@ -0,0 +1,117 @@
+<?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 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        title="Menu focus testing">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"/>
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../role.js" />
+  <script type="application/javascript"
+          src="../states.js" />
+  <script type="application/javascript"
+          src="../events.js" />
+
+  <script type="application/javascript">
+    // gA11yEventDumpToConsole = true; // debug stuff
+
+    var gQueue = null;
+    function doTests()
+    {
+      // Test focus events.
+      gQueue = new eventQueue();
+
+      if (WIN) {
+        gQueue.push(new toggleTopMenu("fruit", new focusChecker("fruit")));
+        gQueue.push(new synthRightKey("fruit", new focusChecker("vehicle")));
+        gQueue.push(new synthEscapeKey("vehicle", new focusChecker(document)));
+      }
+
+      // mouse move activate items but no focus event until menubar is active
+      gQueue.push(new synthMouseMove("fruit", new nofocusChecker("apple")));
+
+      // mouseover and click on menuitem makes it active before menubar is
+      // active
+      gQueue.push(new synthClick("fruit", new focusChecker("fruit"), { where: "center" }));
+
+      // mouseover on menuitem when menubar is active
+      gQueue.push(new synthMouseMove("apple", new focusChecker("apple")));
+
+      // keydown on disabled menuitem (disabled items are skipped on linux)
+      if (WIN)
+        gQueue.push(new synthDownKey("apple", new focusChecker("orange")));
+
+      // menu and menuitem are both active
+      // XXX: intermitent failure because two focus events may be coalesced,
+      // think to workaround or fix this issue, when done enable queue invoker
+      // below and remove next two.
+      //gQueue.push(new synthRightKey("apple",
+      //                              [ new focusChecker("vehicle"),
+      //                                new focusChecker("cycle")]));
+      gQueue.push(new synthMouseMove("vehicle", new focusChecker("vehicle")));
+      gQueue.push(new synthDownKey("vehicle", new focusChecker("cycle")));
+
+      // open submenu
+      gQueue.push(new synthRightKey("cycle", new focusChecker("tricycle")));
+
+      // move to first menu in cycle, DOMMenuItemActive is fired for fruit,
+      // cycle and apple menuitems (bug 685191)
+      todo(false, "focus is fired for 'cycle' menuitem");
+      //gQueue.push(new synthRightKey("vehicle", new focusChecker("apple")));
+
+      // click menuitem to close menu, focus gets back to document
+      gQueue.push(new synthClick("tricycle", new focusChecker(document), { where: "center" }));
+
+      //enableLogging("focus,DOMEvents,tree"); // logging for bug708927
+      //gQueue.onFinish = function() { disableLogging(); }
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+
+  <hbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=673958"
+         title="Rework accessible focus handling">
+        Mozilla Bug 673958
+      </a>
+      <p id="display"></p>
+      <div id="content" style="display: none"></div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <vbox flex="1">
+      <menubar>
+        <menu id="fruit" label="Fruit">
+          <menupopup>
+            <menuitem id="apple" label="Apple"/>
+            <menuitem id="orange" label="Orange" disabled="true"/>
+          </menupopup>
+        </menu>
+        <menu id="vehicle" label="Vehicle">
+          <menupopup id="vehiclePopup">
+            <menu id="cycle" label="cycle">
+              <menupopup>
+                <menuitem id="tricycle" label="tricycle"/>
+              </menupopup>
+            </menu>
+            <menuitem id="car" label="Car" disabled="true"/>
+          </menupopup>
+        </menu>
+      </menubar>
+
+      <vbox id="eventdump"/>
+    </vbox>
+  </hbox>
+</window>
diff --git a/accessible/tests/mochitest/events/test_focus_name.html b/accessible/tests/mochitest/events/test_focus_name.html
new file mode 100644
index 0000000000..aa77923909
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_name.html
@@ -0,0 +1,116 @@
+<html>
+
+<head>
+  <title>Accessible name testing on focus</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    /**
+     * Checker for invokers.
+     */
+    function actionChecker(aID, aDescription) {
+      this.__proto__ = new invokerChecker(EVENT_FOCUS, aID);
+
+      this.check = function actionChecker_check(aEvent) {
+        var target = aEvent.accessible;
+        is(target.description, aDescription,
+           "Wrong description for " + prettyName(target));
+      };
+    }
+
+    var gFocusHandler = {
+      handleEvent: function gFocusHandler_handleEvent(aEvent) {
+        var elm = aEvent.target;
+        if (elm.nodeType != Node.ELEMENT_NODE)
+          return;
+
+        gTooltipElm.style.display = "block";
+
+        elm.setAttribute("aria-describedby", "tooltip");
+      },
+    };
+
+    var gBlurHandler = {
+      handleEvent: function gBlurHandler_handleEvent(aEvent) {
+        gTooltipElm.style.display = "none";
+
+        var elm = aEvent.target;
+        if (elm.nodeType == Node.ELEMENT_NODE)
+          elm.removeAttribute("aria-describedby");
+      },
+    };
+
+    /**
+     * Do tests.
+     */
+
+    // gA11yEventDumpID = "eventdump"; // debug stuff
+    // gA11yEventDumpToConsole = true;
+
+    var gQueue = null;
+
+    var gButtonElm = null;
+    var gTextboxElm = null;
+    var gTooltipElm = null;
+
+    function doTests() {
+      gButtonElm = getNode("button");
+      gTextboxElm = getNode("textbox");
+      gTooltipElm = getNode("tooltip");
+
+      gButtonElm.addEventListener("focus", gFocusHandler);
+      gButtonElm.addEventListener("blur", gBlurHandler);
+      gTextboxElm.addEventListener("focus", gFocusHandler);
+      gTextboxElm.addEventListener("blur", gBlurHandler);
+
+      // The aria-describedby is changed on DOM focus. Accessible description
+      // should be updated when a11y focus is fired.
+      gQueue = new eventQueue(nsIAccessibleEvent.EVENT_FOCUS);
+      gQueue.onFinish = function() {
+        gButtonElm.removeEventListener("focus", gFocusHandler);
+        gButtonElm.removeEventListener("blur", gBlurHandler);
+        gTextboxElm.removeEventListener("focus", gFocusHandler);
+        gTextboxElm.removeEventListener("blur", gBlurHandler);
+      };
+
+      var descr = "It's a tooltip";
+      gQueue.push(new synthFocus("button", new actionChecker("button", descr)));
+      gQueue.push(new synthTab("textbox", new actionChecker("textbox", descr)));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=520709"
+     title="mochitest to ensure name/description are updated on a11y focus if they were changed on DOM focus">
+    Mozilla Bug 520709
+  </a>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div id="tooltip" style="display: none" aria-hidden="true">It's a tooltip</div>
+  <button id="button">button</button>
+  <input id="textbox">
+
+  <div id="eventdump"></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_focus_removal.html b/accessible/tests/mochitest/events/test_focus_removal.html
new file mode 100644
index 0000000000..eb47b07075
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_removal.html
@@ -0,0 +1,95 @@
+<html>
+
+<head>
+  <title>Test removal of focused accessible</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../promisified-events.js"></script>
+
+  <script type="application/javascript">
+    async function setFocus(aNodeToFocus, aExpectedFocus) {
+      let expected = aExpectedFocus || aNodeToFocus;
+      let focused = waitForEvent(EVENT_FOCUS, expected);
+      info("Focusing " + aNodeToFocus.id);
+      aNodeToFocus.focus();
+      await focused;
+      ok(true, expected.id + " focused after " +
+        aNodeToFocus.id + ".focus()");
+    }
+
+    async function expectFocusAfterRemove(aNodeToRemove, aExpectedFocus, aDisplayNone = false) {
+      let focused = waitForEvent(EVENT_FOCUS, aExpectedFocus);
+      info("Removing " + aNodeToRemove.id);
+      if (aDisplayNone) {
+        aNodeToRemove.style.display = "none";
+      } else {
+        aNodeToRemove.remove();
+      }
+      await focused;
+      let friendlyExpected = aExpectedFocus == document ?
+        "document" : aExpectedFocus.id;
+      ok(true, friendlyExpected + " focused after " +
+        aNodeToRemove.id + " removed");
+    }
+
+    async function doTests() {
+      info("Testing removal of focused node itself");
+      let button = getNode("button");
+      await setFocus(button);
+      await expectFocusAfterRemove(button, document);
+
+      info("Testing removal of focused node's parent");
+      let dialog = getNode("dialog");
+      let dialogButton = getNode("dialogButton");
+      await setFocus(dialogButton);
+      await expectFocusAfterRemove(dialog, document);
+
+      info("Testing removal of aria-activedescendant target");
+      let listbox = getNode("listbox");
+      let option = getNode("option");
+      await setFocus(listbox, option);
+      await expectFocusAfterRemove(option, listbox);
+
+      info("Test hiding focused element with display: none");
+      let groupingButton = getNode("groupingButton");
+      await setFocus(groupingButton);
+      await expectFocusAfterRemove(groupingButton, document, true);
+
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <button id="button"></button>
+
+  <div role="dialog" id="dialog">
+    <button id="dialogButton"></button>
+  </div>
+
+  <div role="listbox" id="listbox" tabindex="0" aria-activedescendant="option">
+    <div role="option" id="option"></div>
+  </div>
+
+  <div role="grouping" id="grouping">
+    <button id="groupingButton">
+  </div>
+
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_focus_selects.html b/accessible/tests/mochitest/events/test_focus_selects.html
new file mode 100644
index 0000000000..881c8049fd
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_selects.html
@@ -0,0 +1,173 @@
+<html>
+
+<head>
+  <title>Accessible focus testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../promisified-events.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+
+  <script type="application/javascript">
+    // gA11yEventDumpID = "eventdump"; // debug stuff
+    // gA11yEventDumpToConsole = true;
+    var gQueue = null;
+
+    async function doTests() {
+      // Bug 746534 - File causes crash or hang on OS X
+      if (MAC) {
+        todo(false, "Bug 746534 - test file causes crash or hang on OS X");
+        SimpleTest.finish();
+        return;
+      }
+
+      let p = waitForEvent(EVENT_FOCUS, "orange");
+      // first item is focused until there's selection
+      getNode("list").focus();
+      await p;
+
+      p = waitForEvents({
+        expected: [[EVENT_SELECTION, "orange"]],
+        unexpected: [
+          [EVENT_FOCUS],
+          stateChangeEventArgs("orange", EXT_STATE_ACTIVE, true, true),
+        ],
+      });
+      // item is selected and stays focused and active
+      synthesizeKey("VK_DOWN");
+      await p;
+
+      p = waitForEvents([
+        stateChangeEventArgs("orange", EXT_STATE_ACTIVE, false, true),
+        stateChangeEventArgs("apple", EXT_STATE_ACTIVE, true, true),
+        [EVENT_FOCUS, "apple"],
+      ]);
+      // last selected item is focused
+      synthesizeKey("VK_DOWN", { shiftKey: true });
+      await p;
+
+      p = waitForEvents({
+        expected: [
+          [EVENT_FOCUS, "orange"],
+          stateChangeEventArgs("orange", EXT_STATE_ACTIVE, true, true),
+        ],
+        unexpected: [
+          [EVENT_FOCUS, "apple"],
+          stateChangeEventArgs("apple", EXT_STATE_ACTIVE, true, true),
+        ],
+      });
+      // no focus event if nothing is changed
+      synthesizeKey("VK_DOWN");
+      // current item is focused
+      synthesizeKey("VK_UP", { ctrlKey: true });
+      await p;
+
+      p = waitForEvent(EVENT_FOCUS, "emptylist");
+      // focus on empty list (no items to be focused)
+      synthesizeKey("VK_TAB");
+      await p;
+
+      p = waitForEvents({
+        expected: [[EVENT_FOCUS, "orange"]],
+        unexpected: [stateChangeEventArgs("orange", EXT_STATE_ACTIVE, true, true)],
+      });
+      // current item is focused
+      synthesizeKey("VK_TAB", { shiftKey: true });
+      await p;
+
+      p = waitForEvent(EVENT_FOCUS, "combobox");
+      getNode("combobox").focus();
+      await p;
+
+      p = waitForEvents({
+        expected: [[EVENT_SELECTION, "cb_apple"]],
+        unexpected: [
+          [EVENT_FOCUS],
+          stateChangeEventArgs("cb_apple", EXT_STATE_ACTIVE, true, true),
+        ],
+      });
+      // collapsed combobox keeps a focus
+      synthesizeKey("VK_DOWN");
+      await p;
+
+      // no focus events for unfocused list controls when current item is
+      // changed
+
+      p = waitForEvent(EVENT_FOCUS, "emptylist");
+      getNode("emptylist").focus();
+      await p;
+
+      p = waitForEvents({
+        expected: [[EVENT_SELECTION, "orange"]],
+        unexpected: [
+          [EVENT_FOCUS],
+          stateChangeEventArgs("orange", EXT_STATE_ACTIVE, true, true),
+        ],
+      });
+      // An unfocused selectable list gets selection change events,
+      // but not active or focus change events.
+      getNode("list").selectedIndex = getNode("orange").index;
+      await p;
+
+      p = waitForEvents({
+        expected: [[EVENT_SELECTION, "cb_orange"]],
+        unexpected: [
+          [EVENT_FOCUS],
+          stateChangeEventArgs("cb_orange", EXT_STATE_ACTIVE, true, true),
+        ],
+      });
+      // An unfocused selectable combobox gets selection change events,
+      // but not focus events nor active state change events.
+      getNode("cb_orange").selected = true;
+      await p;
+
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=433418"
+     title="Accessibles for focused HTML Select elements are not getting focused state">
+    Mozilla Bug 433418
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=474893"
+     title="List controls should fire a focus event on the selected child when tabbing or when the selected child changes while the list is focused">
+    Mozilla Bug 474893
+  </a>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <select id="list" size="5" multiple="">
+    <option id="orange">Orange</option>
+    <option id="apple">Apple</option>
+  </select>
+
+  <select id="emptylist" size="5"></select>
+
+  <select id="combobox">
+    <option id="cb_orange">Orange</option>
+    <option id="cb_apple">Apple</option>
+  </select>
+
+  <div id="eventdump"></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_focus_tabbox.xhtml b/accessible/tests/mochitest/events/test_focus_tabbox.xhtml
new file mode 100644
index 0000000000..1b808831dc
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_tabbox.xhtml
@@ -0,0 +1,102 @@
+<?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 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        xmlns:html="http://www.w3.org/1999/xhtml"
+        title="Tabbox focus testing">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"/>
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../role.js" />
+  <script type="application/javascript"
+          src="../states.js" />
+  <script type="application/javascript"
+          src="../events.js" />
+
+  <script type="application/javascript">
+    //gA11yEventDumpID = "eventdump"; // debug stuff
+    //gA11yEventDumpToConsole = true; // debug stuff
+
+    var gQueue = null;
+    function doTests()
+    {
+      if (MAC) {
+        todo(false, "Tests disabled because of imminent failure.");
+        SimpleTest.finish();
+        return;
+      }
+
+      // Test focus events.
+      gQueue = new eventQueue();
+
+      var input = getNode("input");
+      gQueue.push(new synthClick("tab1", new focusChecker("tab1")));
+      gQueue.push(new synthTab("tab1", new focusChecker("checkbox1")));
+      gQueue.push(new synthKey("tab1", "VK_TAB", { ctrlKey: true },
+                               new focusChecker(input)));
+      gQueue.push(new synthKey("tab2", "VK_TAB", { ctrlKey: true },
+                               new focusChecker("tab3")));
+      gQueue.push(new synthKey("tab3", "VK_TAB", { ctrlKey: true },
+                               new focusChecker("tab1")));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+
+  <hbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=370396"
+         title="Control+Tab to an empty tab panel in a tabbox causes focus to leave the tabbox">
+        Mozilla Bug 370396
+      </a>
+      <p id="display"></p>
+      <div id="content" style="display: none"></div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <vbox flex="1">
+      <tabbox>
+        <tabs>
+          <tab id="tab1" label="Tab1" selected="true"/>
+          <tab id="tab2" label="Tab2" />
+          <tab id="tab3" label="Tab3" />
+        </tabs>
+        <tabpanels>
+          <tabpanel orient="vertical">
+            <groupbox orient="vertical">
+              <checkbox id="checkbox1" label="Monday" width="75"/>
+              <checkbox label="Tuesday" width="75"/>
+              <checkbox label="Wednesday" width="75"/>
+              <checkbox label="Thursday" width="75"/>
+              <checkbox label="Friday" width="75"/>
+              <checkbox label="Saturday" width="75"/>
+              <checkbox label="Sunday" width="75"/>
+            </groupbox>
+
+            <spacer style="height: 10px" />
+            <label value="Label After checkboxes" />
+          </tabpanel>
+          <tabpanel orient="vertical">
+            <html:input id="input" />
+          </tabpanel>
+          <tabpanel orient="vertical">
+            <description>Tab 3 content</description>
+          </tabpanel>
+        </tabpanels>
+      </tabbox>
+
+      <vbox id="eventdump"/>
+    </vbox>
+  </hbox>
+</window>
diff --git a/accessible/tests/mochitest/events/test_focus_tree.xhtml b/accessible/tests/mochitest/events/test_focus_tree.xhtml
new file mode 100644
index 0000000000..f36816c788
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focus_tree.xhtml
@@ -0,0 +1,117 @@
+<?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 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        title="XUL tree focus testing">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"/>
+
+  <script type="application/javascript"
+          src="../treeview.js" />
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../role.js" />
+  <script type="application/javascript"
+          src="../states.js" />
+  <script type="application/javascript"
+          src="../events.js" />
+
+  <script type="application/javascript">
+  <![CDATA[
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    function focusTree(aTreeID)
+    {
+      var checker = new focusChecker(getFirstTreeItem, aTreeID);
+      this.__proto__ = new synthFocus(aTreeID, [ checker ]);
+    }
+
+    function moveToNextItem(aTreeID)
+    {
+      var checker = new focusChecker(getSecondTreeItem, aTreeID);
+      this.__proto__ = new synthDownKey(aTreeID, [ checker ]);
+    }
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Helpers
+
+    function getTreeItemAt(aTreeID, aIdx)
+      { return getAccessible(aTreeID).getChildAt(aIdx + 1); }
+
+    function getFirstTreeItem(aTreeID)
+      { return getTreeItemAt(aTreeID, 0); }
+
+    function getSecondTreeItem(aTreeID)
+      { return getTreeItemAt(aTreeID, 1); }
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Test
+
+    var gQueue = null;
+
+    //gA11yEventDumpID = "debug"; // debugging
+    //gA11yEventDumpToConsole = true; // debugging
+
+    function doTest()
+    {
+      gQueue = new eventQueue();
+
+      gQueue.push(new focusTree("tree"));
+      gQueue.push(new moveToNextItem("tree"));
+      gQueue.push(new synthFocus("emptytree"));
+
+      // no focus event for changed current item for unfocused tree
+      gQueue.push(new changeCurrentItem("tree", 0));
+
+      gQueue.invoke();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yXULTreeLoadEvent(doTest, "tree", new nsTableTreeView(5));
+  ]]>
+  </script>
+
+  <hbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=386821"
+         title="Need better solution for firing delayed event against xul tree">
+        Mozilla Bug 386821
+      </a>
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=406308"
+         title="Don't fire accessible focus events if widget is not actually in focus, confuses screen readers">
+        Mozilla Bug 406308
+      </a>
+      <p id="display"></p>
+      <div id="content" style="display: none">
+      </div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <vbox id="debug"/>
+    <tree id="tree" flex="1">
+      <treecols>
+        <treecol id="col1" flex="1" primary="true" label="column"/>
+        <treecol id="col2" flex="1" label="column 2"/>
+      </treecols>
+      <treechildren id="treechildren"/>
+    </tree>
+    <tree id="emptytree" flex="1">
+      <treecols>
+        <treecol id="emptytree_col1" flex="1" primary="true" label="column"/>
+        <treecol id="emptytree_col2" flex="1" label="column 2"/>
+      </treecols>
+      <treechildren id="emptytree_treechildren"/>
+    </tree>
+  </hbox>
+
+</window>
diff --git a/accessible/tests/mochitest/events/test_focusable_statechange.html b/accessible/tests/mochitest/events/test_focusable_statechange.html
new file mode 100644
index 0000000000..5501f55187
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_focusable_statechange.html
@@ -0,0 +1,128 @@
+<html>
+
+<head>
+  <title>Test removal of focused accessible</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+  <script type="application/javascript"
+          src="../promisified-events.js"></script>
+
+  <script type="application/javascript">
+    function focusableStateChange(id, enabled) {
+      return [EVENT_STATE_CHANGE, e => {
+         e.QueryInterface(nsIAccessibleStateChangeEvent);
+         return getAccessible(id) == e.accessible &&
+          e.state == STATE_FOCUSABLE && (enabled == undefined || e.isEnabled == enabled);
+      }];
+     }
+
+    function editableStateChange(id, enabled) {
+      return [EVENT_STATE_CHANGE, e => {
+          e.QueryInterface(nsIAccessibleStateChangeEvent);
+          return getAccessible(id) == e.accessible &&
+          e.state == EXT_STATE_EDITABLE && e.isExtraState &&
+          (enabled == undefined || e.isEnabled == enabled);
+      }];
+    }
+
+    async function doTests() {
+      info("disable buttons.");
+      // Expect focusable change with 'disabled',
+      // and don't expect it with 'aria-disabled'.
+      let p = waitForEvents({
+        expected: [focusableStateChange("button2", false)],
+        unexpected: [focusableStateChange("button1")]
+      });
+      getNode("button1").setAttribute("aria-disabled", "true");
+      getNode("button2").disabled = true;
+      await p;
+
+      info("re-enable button");
+      // Expect focusable change with 'disabled',
+      // and don't expect it with 'aria-disabled'.
+      p = waitForEvents({
+        expected: [focusableStateChange("button2", true)],
+        unexpected: [focusableStateChange("button1")]
+      });
+      getNode("button1").setAttribute("aria-disabled", "false");
+      getNode("button2").disabled = false;
+      await p;
+
+      info("add tabindex");
+      // Expect focusable change on non-input,
+      // and don't expect event on an already focusable input.
+      p = waitForEvents({
+        expected: [focusableStateChange("div", true)],
+        unexpected: [focusableStateChange("button2")]
+      });
+      getNode("button2").tabIndex = "0";
+      getNode("div").tabIndex = "0";
+      await p;
+
+      info("remove tabindex");
+      // Expect focusable change when removing tabindex.
+      p = waitForEvent(...focusableStateChange("div", false));
+      getNode("div").removeAttribute("tabindex");
+      await p;
+
+      p = waitForEvent(...focusableStateChange("link", false));
+      getNode("link").removeAttribute("href");
+      await p;
+
+      info("add contenteditable");
+      // Expect editable change on non-input,
+      // and don't expect event on a native input.
+      p = waitForEvents({
+        expected: [focusableStateChange("div", true), editableStateChange("div", true)],
+        unexpected: [focusableStateChange("input"), editableStateChange("input")]
+      });
+      getNode("input").contentEditable = true;
+      getNode("div").contentEditable = true;
+      await p;
+
+      info("remove contenteditable");
+      // Expect editable change on non-input,
+      // and don't expect event on a native input.
+      p = waitForEvents({
+        expected: [focusableStateChange("div", false), editableStateChange("div", false)],
+        unexpected: [focusableStateChange("input"), editableStateChange("input")]
+      });
+      getNode("input").contentEditable = false;
+      getNode("div").contentEditable = false;
+      await p;
+
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <button id="button1"></button>
+  <button id="button2"></button>
+
+  <div id="div">Hello</div>
+
+  <a id="link" href="#">A link</a>
+
+  <input id="input" value="Hello">
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_fromUserInput.html b/accessible/tests/mochitest/events/test_fromUserInput.html
new file mode 100644
index 0000000000..b3617358cf
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_fromUserInput.html
@@ -0,0 +1,112 @@
+<html>
+
+<head>
+  <title>Testing of isFromUserInput in text events</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+
+    /**
+     * Remove text data from HTML input.
+     */
+    function removeTextFromInput(aID, aStart, aEnd, aText, aFromUser) {
+      this.DOMNode = getNode(aID);
+
+      this.eventSeq = [
+        new textChangeChecker(aID, aStart, aEnd, aText, false, aFromUser),
+      ];
+
+      this.invoke = function removeTextFromInput_invoke() {
+        this.DOMNode.focus();
+        this.DOMNode.setSelectionRange(aStart, aEnd);
+
+        synthesizeKey("KEY_Delete");
+      };
+
+      this.getID = function removeTextFromInput_getID() {
+        return "Remove text from " + aStart + " to " + aEnd + " for " +
+          prettyName(aID);
+      };
+    }
+
+    /**
+     * Remove text data from text node.
+     */
+    function removeTextFromContentEditable(aID, aStart, aEnd, aText, aFromUser) {
+      this.DOMNode = getNode(aID);
+
+      this.eventSeq = [
+        new textChangeChecker(aID, aStart, aEnd, aText, false, aFromUser),
+      ];
+
+      this.invoke = function removeTextFromContentEditable_invoke() {
+        this.DOMNode.focus();
+        this.textNode = getNode(aID).firstChild;
+        var selection = window.getSelection();
+        var range = document.createRange();
+        range.setStart(this.textNode, aStart);
+        range.setEnd(this.textNode, aEnd);
+        selection.addRange(range);
+
+        synthesizeKey("KEY_Delete");
+      };
+
+      this.getID = function removeTextFromContentEditable_getID() {
+        return "Remove text from " + aStart + " to " + aEnd + " for " +
+          prettyName(aID);
+      };
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+    // gA11yEventDumpID = "eventdump"; // debug stuff
+
+    var gQueue = null;
+
+    function doTests() {
+      gQueue = new eventQueue();
+
+      // Focused editable text node
+      gQueue.push(new removeTextFromContentEditable("div", 0, 3, "hel", true));
+
+      // Focused editable HTML input
+      gQueue.push(new removeTextFromInput("input", 1, 2, "n", true));
+
+      gQueue.invoke(); // Will call SimpleTest.finish()
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+
+  </script>
+</head>
+
+
+<body>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=686909"
+     title="isFromUserInput flag on accessible text change events not correct">
+    Mozilla Bug 686909
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test"></pre>
+  <div id="eventdump"></div>
+
+  <div id="div" contentEditable="true">hello</div>
+  <input id="input" value="input">
+
+</body>
+
+</html>
diff --git a/accessible/tests/mochitest/events/test_label.xhtml b/accessible/tests/mochitest/events/test_label.xhtml
new file mode 100644
index 0000000000..5780629dc6
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_label.xhtml
@@ -0,0 +1,178 @@
+<?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 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        title="Tests: accessible XUL label/description events">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../role.js" />
+  <script type="application/javascript"
+          src="../events.js" />
+
+  <script type="application/javascript">
+  <![CDATA[
+    ////////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    const kRecreated = 0;
+    const kTextRemoved = 1;
+    const kTextChanged = 2;
+
+    const kNoValue = 0;
+
+    /**
+     * Set/remove @value attribute.
+     */
+    function setValue(aID, aValue, aResult, aOldValue)
+    {
+      this.labelNode = getNode(aID);
+
+      this.eventSeq = [];
+
+      switch (aResult) {
+        case kRecreated:
+          this.eventSeq.push(new invokerChecker(EVENT_HIDE, this.labelNode));
+          this.eventSeq.push(new invokerChecker(EVENT_SHOW, this.labelNode));
+          break;
+        case kTextRemoved:
+          this.eventSeq.push(
+            new textChangeChecker(this.labelNode, 0, aOldValue.length,
+                                  aOldValue, false));
+          break;
+        case kTextChanged:
+          this.eventSeq.push(
+            new textChangeChecker(this.labelNode, 0, aOldValue.length,
+                                  aOldValue, false));
+           this.eventSeq.push(
+             new textChangeChecker(this.labelNode, 0, aValue.length,
+                                   aValue, true));
+          break;
+      }
+
+      this.invoke = function setValue_invoke()
+      {
+        if (aValue === kNoValue)
+          this.labelNode.removeAttribute("value");
+        else
+          this.labelNode.setAttribute("value", aValue);
+      }
+
+      this.finalCheck = function setValue_finalCheck()
+      {
+        let tree =
+          { LABEL: [] };
+
+        const expectChild = (() => {
+          if (aValue === kNoValue) {
+            return false;
+          }
+          if (aValue === "") {
+            return this.labelNode.nodeName == "label";
+          }
+          return true;
+        })();
+
+        if (expectChild) {
+          tree.LABEL.push({ STATICTEXT: [ ] });
+        }
+        testAccessibleTree(aID, tree);
+      }
+
+      this.getID = function setValue_getID()
+      {
+        return "set @value='" + aValue + "' for label " + prettyName(aID);
+      }
+    }
+
+    /**
+     * Change @crop attribute.
+     */
+    function setCrop(aID, aCropValue, aRemovedText, aInsertedText)
+    {
+      this.labelNode = getNode(aID);
+      this.width = this.labelNode.getBoundingClientRect().width;
+      this.charWidth = this.width / this.labelNode.value.length;
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, this.labelNode),
+        new invokerChecker(EVENT_SHOW, this.labelNode),
+      ];
+
+      this.invoke = function setCrop_invoke()
+      {
+        if (!this.labelNode.hasAttribute("crop"))
+          this.labelNode.style.width = Math.floor(this.width - 2 * this.charWidth) + "px";
+
+        this.labelNode.setAttribute("crop", aCropValue);
+      }
+
+      this.getID = function setCrop_finalCheck()
+      {
+        return "set crop " + aCropValue;
+      }
+    }
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Test
+
+    gA11yEventDumpToConsole = true;
+
+    var gQueue = null;
+    function doTest()
+    {
+      gQueue = new eventQueue();
+
+      gQueue.push(new setValue("label", "shiroka strana", kRecreated));
+      gQueue.push(new setValue("label", "?<>!+_", kTextChanged, "shiroka strana"));
+      gQueue.push(new setValue("label", "", kRecreated));
+      gQueue.push(new setValue("label", kNoValue, kRecreated));
+
+      gQueue.push(new setValue("descr", "hello world", kRecreated));
+      gQueue.push(new setValue("descr", "si_ya", kTextChanged, "hello world"));
+      gQueue.push(new setValue("descr", "", kTextRemoved, "si_ya"));
+      gQueue.push(new setValue("descr", kNoValue, kRecreated));
+
+      gQueue.push(new setCrop("croplabel", "center"));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTest);
+  ]]>
+  </script>
+
+  <hbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=396166"
+         title="xul:label@value accessible should implement nsIAccessibleText">
+        Bug 396166
+      </a>
+      <br/>
+      <p id="display"></p>
+      <div id="content" style="display: none">
+      </div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <vbox flex="1">
+      <label id="label"/>
+      <description id="descr"/>
+
+      <hbox>
+      <label id="croplabel" value="valuetocro"
+             style="font-family: monospace;"/>
+      </hbox>
+    </vbox>
+  </hbox>
+
+</window>
+
diff --git a/accessible/tests/mochitest/events/test_menu.xhtml b/accessible/tests/mochitest/events/test_menu.xhtml
new file mode 100644
index 0000000000..271831ba83
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_menu.xhtml
@@ -0,0 +1,200 @@
+<?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 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        title="Accessible menu events testing for XUL menu">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"/>
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../events.js" />
+
+  <script><![CDATA[
+    function openFileMenu()
+    {
+      this.eventSeq = [
+        new invokerChecker(EVENT_MENU_START, "menubar"),
+        new invokerChecker("popupshown", "menupopup-file")
+        // new invokerChecker(EVENT_FOCUS, getNode("menuitem-newtab")) intermitent failure
+      ];
+
+      this.invoke = function openFileMenu_invoke()
+      {
+        synthesizeKey("F", {altKey: true, shiftKey: true});
+      }
+
+      this.getID = function openFileMenu_getID()
+      {
+        return "open file menu by alt+F press";
+      }
+    }
+
+    function openEditMenu()
+    {
+      this.eventSeq = [
+        new invokerChecker("popuphidden", "menupopup-file"),
+        new invokerChecker("popupshown", "menupopup-edit"),
+        // new invokerChecker(EVENT_FOCUS, getNode("menuitem-undo")) intermitent failure
+      ];
+
+      this.invoke = function openEditMenu_invoke()
+      {
+        synthesizeKey("KEY_ArrowRight");
+      }
+
+      this.getID = function openEditMenu_getID()
+      {
+        return "open edit menu by lef arrow press";
+      }
+    }
+
+    function closeEditMenu()
+    {
+      this.eventSeq = [
+        //new invokerChecker(EVENT_FOCUS, document), intermitent failure
+        new invokerChecker("popuphidden", "menupopup-edit"),
+      ];
+
+      this.invoke = function closeEditMenu_invoke()
+      {
+        synthesizeKey("KEY_Escape");
+      }
+
+      this.getID = function closeEditMenu_getID()
+      {
+        return "close edit menu";
+      }
+    }
+
+    function focusFileMenu()
+    {
+      this.eventSeq = [
+        new invokerChecker(EVENT_MENU_START, getNode("menubar"))
+        // new invokerChecker(EVENT_FOCUS, getNode("menuitem-file")) //intermitent failure
+      ];
+
+      this.invoke = function focusFileMenu_invoke()
+      {
+        synthesizeKey("KEY_Alt");
+      }
+
+      this.getID = function focusFileMenu_getID()
+      {
+        return "activate menubar, focus file menu (atl press)";
+      }
+    }
+
+    function focusEditMenu()
+    {
+      this.eventSeq = [
+        new invokerChecker(EVENT_FOCUS, getNode("menuitem-edit"))
+      ];
+
+      this.invoke = function focusEditMenu_invoke()
+      {
+        synthesizeKey("KEY_ArrowRight");
+      }
+
+      this.getID = function focusEditMenu_getID()
+      {
+        return "focus edit menu";
+      }
+    }
+
+    function leaveMenubar()
+    {
+      this.eventSeq = [
+        //new invokerChecker(EVENT_FOCUS, document), intermitent failure
+        new invokerChecker(EVENT_MENU_END, "menubar")
+      ];
+
+      this.invoke = function leaveMenubar_invoke()
+      {
+        synthesizeKey("KEY_Escape");
+      }
+
+      this.getID = function leaveMenubar_getID()
+      {
+        return "leave menubar";
+      }
+    }
+
+    /**
+     * Do tests.
+     */
+
+    //gA11yEventDumpID = "eventdump";
+    //gA11yEventDumpToConsole = true;
+
+    var gQueue = null;
+
+    function doTests()
+    {
+      if (!WIN && !LINUX) {
+        todo(false, "Enable this test on other platforms.");
+        SimpleTest.finish();
+        return;
+      }
+
+      todo(false,
+           "Fix intermitent failures. Focus may randomly occur before or after menupopup events!");
+
+      gQueue = new eventQueue();
+
+      gQueue.push(new openFileMenu());
+      gQueue.push(new openEditMenu());
+      gQueue.push(new closeEditMenu());
+      gQueue.push(new leaveMenubar());
+
+      // Alt key is used to active menubar and focus menu item on Windows,
+      // other platforms requires setting a ui.key.menuAccessKeyFocuses
+      // preference.
+      if (WIN || LINUX) {
+        gQueue.push(new focusFileMenu());
+        gQueue.push(new focusEditMenu());
+        gQueue.push(new leaveMenubar());
+      }
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  ]]></script>
+
+  <hbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=615189"
+         title="Clean up FireAccessibleFocusEvent">
+        Mozilla Bug 615189
+      </a>
+      <p id="display"></p>
+      <div id="content" style="display: none"></div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <vbox flex="1">
+      <menubar id="menubar">
+        <menu id="menuitem-file" label="File" accesskey="F">
+          <menupopup id="menupopup-file">
+            <menuitem id="menuitem-newtab" label="New Tab"/>
+          </menupopup>
+        </menu>
+        <menu id="menuitem-edit" label="Edit" accesskey="E">
+          <menupopup id="menupopup-edit">
+            <menuitem id="menuitem-undo" label="Undo"/>
+          </menupopup>
+        </menu>
+      </menubar>
+
+      <vbox id="eventdump" role="log"/>
+    </vbox>
+  </hbox>
+</window>
diff --git a/accessible/tests/mochitest/events/test_mutation.html b/accessible/tests/mochitest/events/test_mutation.html
new file mode 100644
index 0000000000..7ee876570b
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_mutation.html
@@ -0,0 +1,580 @@
+<html>
+
+<head>
+  <title>Accessible mutation events testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <style>
+    div.displayNone a { display:none; }
+    div.visibilityHidden a { visibility:hidden; }
+</style>
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    /**
+     * Invokers.
+     */
+    var kNoEvents = 0;
+
+    var kShowEvent = 1;
+    var kHideEvent = 2;
+    var kReorderEvent = 4;
+    var kShowEvents = kShowEvent | kReorderEvent;
+    var kHideEvents = kHideEvent | kReorderEvent;
+    var kHideAndShowEvents = kHideEvents | kShowEvent;
+
+    /**
+     * Base class to test mutation a11y events.
+     *
+     * @param aNodeOrID          [in] node invoker's action is executed for
+     * @param aEventTypes        [in] events to register (see constants above)
+     * @param aDoNotExpectEvents [in] boolean indicates if events are expected
+     */
+    function mutateA11yTree(aNodeOrID, aEventTypes, aDoNotExpectEvents) {
+      // Interface
+      this.DOMNode = getNode(aNodeOrID);
+      this.doNotExpectEvents = aDoNotExpectEvents;
+      this.eventSeq = [];
+      this.unexpectedEventSeq = [];
+
+      /**
+       * Change default target (aNodeOrID) registered for the given event type.
+       */
+      this.setTarget = function mutateA11yTree_setTarget(aEventType, aTarget) {
+        var type = this.getA11yEventType(aEventType);
+        for (var idx = 0; idx < this.getEventSeq().length; idx++) {
+          if (this.getEventSeq()[idx].type == type) {
+            this.getEventSeq()[idx].target = aTarget;
+            return idx;
+          }
+        }
+        return -1;
+      };
+
+      /**
+       * Replace the default target currently registered for a given event type
+       * with the nodes in the targets array.
+       */
+      this.setTargets = function mutateA11yTree_setTargets(aEventType, aTargets) {
+        var targetIdx = this.setTarget(aEventType, aTargets[0]);
+
+        var type = this.getA11yEventType(aEventType);
+        for (var i = 1; i < aTargets.length; i++) {
+          let checker = new invokerChecker(type, aTargets[i]);
+          this.getEventSeq().splice(++targetIdx, 0, checker);
+        }
+      };
+
+      // Implementation
+      this.getA11yEventType = function mutateA11yTree_getA11yEventType(aEventType) {
+        if (aEventType == kReorderEvent)
+          return nsIAccessibleEvent.EVENT_REORDER;
+
+        if (aEventType == kHideEvent)
+          return nsIAccessibleEvent.EVENT_HIDE;
+
+        if (aEventType == kShowEvent)
+          return nsIAccessibleEvent.EVENT_SHOW;
+
+        return 0;
+      };
+
+      this.getEventSeq = function mutateA11yTree_getEventSeq() {
+        return this.doNotExpectEvents ? this.unexpectedEventSeq : this.eventSeq;
+      };
+
+      if (aEventTypes & kHideEvent) {
+        let checker = new invokerChecker(this.getA11yEventType(kHideEvent),
+                                         this.DOMNode);
+        this.getEventSeq().push(checker);
+      }
+
+      if (aEventTypes & kShowEvent) {
+        let checker = new invokerChecker(this.getA11yEventType(kShowEvent),
+                                         this.DOMNode);
+        this.getEventSeq().push(checker);
+      }
+
+      if (aEventTypes & kReorderEvent) {
+        let checker = new invokerChecker(this.getA11yEventType(kReorderEvent),
+                                         this.DOMNode.parentNode);
+        this.getEventSeq().push(checker);
+      }
+    }
+
+    /**
+     * Change CSS style for the given node.
+     */
+    function changeStyle(aNodeOrID, aProp, aValue, aEventTypes) {
+      this.__proto__ = new mutateA11yTree(aNodeOrID, aEventTypes, false);
+
+      this.invoke = function changeStyle_invoke() {
+        this.DOMNode.style[aProp] = aValue;
+      };
+
+      this.getID = function changeStyle_getID() {
+        return aNodeOrID + " change style " + aProp + " on value " + aValue;
+      };
+    }
+
+    /**
+     * Change class name for the given node.
+     */
+    function changeClass(aParentNodeOrID, aNodeOrID, aClassName, aEventTypes) {
+      this.__proto__ = new mutateA11yTree(aNodeOrID, aEventTypes, false);
+
+      this.invoke = function changeClass_invoke() {
+        this.parentDOMNode.className = aClassName;
+      };
+
+      this.getID = function changeClass_getID() {
+        return aNodeOrID + " change class " + aClassName;
+      };
+
+      this.parentDOMNode = getNode(aParentNodeOrID);
+    }
+
+    /**
+     * Clone the node and append it to its parent.
+     */
+    function cloneAndAppendToDOM(aNodeOrID, aEventTypes,
+                                 aTargetsFunc, aReorderTargetFunc) {
+      var eventTypes = aEventTypes || kShowEvents;
+      var doNotExpectEvents = (aEventTypes == kNoEvents);
+
+      this.__proto__ = new mutateA11yTree(aNodeOrID, eventTypes,
+                                          doNotExpectEvents);
+
+      this.invoke = function cloneAndAppendToDOM_invoke() {
+        var newElm = this.DOMNode.cloneNode(true);
+        newElm.removeAttribute("id");
+
+        var targets = aTargetsFunc ?
+          aTargetsFunc(newElm) : [newElm];
+        this.setTargets(kShowEvent, targets);
+
+        if (aReorderTargetFunc) {
+          var reorderTarget = aReorderTargetFunc(this.DOMNode);
+          this.setTarget(kReorderEvent, reorderTarget);
+        }
+
+        this.DOMNode.parentNode.appendChild(newElm);
+      };
+
+      this.getID = function cloneAndAppendToDOM_getID() {
+        return aNodeOrID + " clone and append to DOM.";
+      };
+    }
+
+    /**
+     * Removes the node from DOM.
+     */
+    function removeFromDOM(aNodeOrID, aEventTypes,
+                           aTargetsFunc, aReorderTargetFunc) {
+      var eventTypes = aEventTypes || kHideEvents;
+      var doNotExpectEvents = (aEventTypes == kNoEvents);
+
+      this.__proto__ = new mutateA11yTree(aNodeOrID, eventTypes,
+                                          doNotExpectEvents);
+
+      this.invoke = function removeFromDOM_invoke() {
+        this.DOMNode.remove();
+      };
+
+      this.getID = function removeFromDOM_getID() {
+        return prettyName(aNodeOrID) + " remove from DOM.";
+      };
+
+      if (aTargetsFunc && (eventTypes & kHideEvent))
+        this.setTargets(kHideEvent, aTargetsFunc(this.DOMNode));
+
+      if (aReorderTargetFunc && (eventTypes & kReorderEvent))
+        this.setTarget(kReorderEvent, aReorderTargetFunc(this.DOMNode));
+    }
+
+    /**
+     * Clone the node and replace the original node by cloned one.
+     */
+    function cloneAndReplaceInDOM(aNodeOrID) {
+      this.__proto__ = new mutateA11yTree(aNodeOrID, kHideAndShowEvents,
+                                          false);
+
+      this.invoke = function cloneAndReplaceInDOM_invoke() {
+        this.DOMNode.parentNode.replaceChild(this.newElm, this.DOMNode);
+      };
+
+      this.getID = function cloneAndReplaceInDOM_getID() {
+        return aNodeOrID + " clone and replace in DOM.";
+      };
+
+      this.newElm = this.DOMNode.cloneNode(true);
+      this.newElm.removeAttribute("id");
+      this.setTarget(kShowEvent, this.newElm);
+    }
+
+    /**
+     * Trigger content insertion (flush layout), removal and insertion of
+     * the same element for the same parent.
+     */
+    function test1(aContainerID) {
+      this.divNode = document.createElement("div");
+      this.divNode.setAttribute("id", "div-test1");
+      this.containerNode = getNode(aContainerID);
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_SHOW, this.divNode),
+        new invokerChecker(EVENT_REORDER, this.containerNode),
+      ];
+
+      this.invoke = function test1_invoke() {
+        this.containerNode.appendChild(this.divNode);
+        getComputedStyle(this.divNode, "").color;
+        this.containerNode.removeChild(this.divNode);
+        this.containerNode.appendChild(this.divNode);
+      };
+
+      this.getID = function test1_getID() {
+        return "fuzzy test #1: content insertion (flush layout), removal and" +
+          "reinsertion";
+      };
+    }
+
+    /**
+     * Trigger content insertion (flush layout), removal and insertion of
+     * the same element for the different parents.
+     */
+    function test2(aContainerID, aTmpContainerID) {
+      this.divNode = document.createElement("div");
+      this.divNode.setAttribute("id", "div-test2");
+      this.containerNode = getNode(aContainerID);
+      this.tmpContainerNode = getNode(aTmpContainerID);
+      this.container = getAccessible(this.containerNode);
+      this.tmpContainer = getAccessible(this.tmpContainerNode);
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_SHOW, this.divNode),
+        new invokerChecker(EVENT_REORDER, this.containerNode),
+      ];
+
+      this.unexpectedEventSeq = [
+        new invokerChecker(EVENT_REORDER, this.tmpContainerNode),
+      ];
+
+      this.invoke = function test2_invoke() {
+        this.tmpContainerNode.appendChild(this.divNode);
+        getComputedStyle(this.divNode, "").color;
+        this.tmpContainerNode.removeChild(this.divNode);
+        this.containerNode.appendChild(this.divNode);
+      };
+
+      this.getID = function test2_getID() {
+        return "fuzzy test #2: content insertion (flush layout), removal and" +
+          "reinsertion under another container";
+      };
+    }
+
+    /**
+     * Content insertion (flush layout) and then removal (nothing was changed).
+     */
+    function test3(aContainerID) {
+      this.divNode = document.createElement("div");
+      this.divNode.setAttribute("id", "div-test3");
+      this.containerNode = getNode(aContainerID);
+
+      this.unexpectedEventSeq = [
+        new invokerChecker(EVENT_SHOW, this.divNode),
+        new invokerChecker(EVENT_HIDE, this.divNode),
+        new invokerChecker(EVENT_REORDER, this.containerNode),
+      ];
+
+      this.invoke = function test3_invoke() {
+        this.containerNode.appendChild(this.divNode);
+        getComputedStyle(this.divNode, "").color;
+        this.containerNode.removeChild(this.divNode);
+      };
+
+      this.getID = function test3_getID() {
+        return "fuzzy test #3: content insertion (flush layout) and removal";
+      };
+    }
+
+    function insertReferredElm(aContainerID) {
+      this.containerNode = getNode(aContainerID);
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_SHOW, function(aNode) { return aNode.firstChild; }, this.containerNode),
+        new invokerChecker(EVENT_SHOW, function(aNode) { return aNode.lastChild; }, this.containerNode),
+        new invokerChecker(EVENT_REORDER, this.containerNode),
+      ];
+
+      this.invoke = function insertReferredElm_invoke() {
+        let span = document.createElement("span");
+        span.setAttribute("id", "insertReferredElms_span");
+        let input = document.createElement("input");
+        input.setAttribute("aria-labelledby", "insertReferredElms_span");
+        this.containerNode.appendChild(span);
+        this.containerNode.appendChild(input);
+      };
+
+      this.getID = function insertReferredElm_getID() {
+        return "insert inaccessible element and then insert referring element to make it accessible";
+      };
+    }
+
+    function showHiddenParentOfVisibleChild() {
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, getNode("c4_child")),
+        new invokerChecker(EVENT_SHOW, getNode("c4_middle")),
+        new invokerChecker(EVENT_REORDER, getNode("c4")),
+      ];
+
+      this.invoke = function showHiddenParentOfVisibleChild_invoke() {
+        getNode("c4_middle").style.visibility = "visible";
+      };
+
+      this.getID = function showHiddenParentOfVisibleChild_getID() {
+        return "show hidden parent of visible child";
+      };
+    }
+
+    function hideNDestroyDoc() {
+      this.txt = null;
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, () => { return this.txt; }),
+      ];
+
+      this.invoke = function hideNDestroyDoc_invoke() {
+        this.txt = getAccessible("c5").firstChild.firstChild;
+        this.txt.DOMNode.remove();
+      };
+
+      this.check = function hideNDestroyDoc_check() {
+        getNode("c5").remove();
+      };
+
+      this.getID = function hideNDestroyDoc_getID() {
+        return "remove text node and destroy a document on hide event";
+      };
+    }
+
+    function hideHideNDestroyDoc() {
+      this.target = null;
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, () => { return this.target; }),
+      ];
+
+      this.invoke = function hideHideNDestroyDoc_invoke() {
+        var doc = getAccessible("c6").firstChild;
+        var l1 = doc.firstChild;
+        this.target = l1.firstChild;
+        var l2 = doc.lastChild;
+        l1.DOMNode.firstChild.remove();
+        l2.DOMNode.firstChild.remove();
+      };
+
+      this.check = function hideHideNDestroyDoc_check() {
+        getNode("c6").remove();
+      };
+
+      this.getID = function hideHideNDestroyDoc_getID() {
+        return "remove text nodes (2 events in the queue) and destroy a document on first hide event";
+      };
+    }
+
+    /**
+     * Target getters.
+     */
+    function getFirstChild(aNode) {
+      return [aNode.firstChild];
+    }
+    function getLastChild(aNode) {
+      return [aNode.lastChild];
+    }
+
+    function getNEnsureFirstChild(aNode) {
+      var node = aNode.firstChild;
+      getAccessible(node);
+      return [node];
+    }
+
+    function getNEnsureChildren(aNode) {
+      var children = [];
+      var node = aNode.firstChild;
+      do {
+        children.push(node);
+        getAccessible(node);
+        node = node.nextSibling;
+      } while (node);
+
+      return children;
+    }
+
+    function getParent(aNode) {
+      return aNode.parentNode;
+    }
+
+    // gA11yEventDumpToConsole = true; // debug stuff
+    // enableLogging("events,verbose");
+
+    /**
+     * Do tests.
+     */
+    var gQueue = null;
+
+    function doTests() {
+      gQueue = new eventQueue();
+
+      // Show/hide events by changing of display style of accessible DOM node
+      // from 'inline' to 'none', 'none' to 'inline'.
+      let id = "link1";
+      getAccessible(id); // ensure accessible is created
+      gQueue.push(new changeStyle(id, "display", "none", kHideEvents));
+      gQueue.push(new changeStyle(id, "display", "inline", kShowEvents));
+
+      // Show/hide events by changing of visibility style of accessible DOM node
+      // from 'visible' to 'hidden', 'hidden' to 'visible'.
+      id = "link2";
+      getAccessible(id);
+      gQueue.push(new changeStyle(id, "visibility", "hidden", kHideEvents));
+      gQueue.push(new changeStyle(id, "visibility", "visible", kShowEvents));
+
+      // Show/hide events by changing of visibility style of accessible DOM node
+      // from 'collapse' to 'visible', 'visible' to 'collapse'.
+      id = "link4";
+      gQueue.push(new changeStyle(id, "visibility", "visible", kShowEvents));
+      gQueue.push(new changeStyle(id, "visibility", "collapse", kHideEvents));
+
+      // Show/hide events by adding new accessible DOM node and removing old one.
+      id = "link5";
+      gQueue.push(new cloneAndAppendToDOM(id));
+      gQueue.push(new removeFromDOM(id));
+
+      // No show/hide events by adding new not accessible DOM node and removing
+      // old one, no reorder event for their parent.
+      id = "child1";
+      gQueue.push(new cloneAndAppendToDOM(id, kNoEvents));
+      gQueue.push(new removeFromDOM(id, kNoEvents));
+
+      // Show/hide events by adding new accessible DOM node and removing
+      // old one, there is reorder event for their parent.
+      id = "child2";
+      gQueue.push(new cloneAndAppendToDOM(id));
+      gQueue.push(new removeFromDOM(id));
+
+      // Show/hide events by adding new DOM node containing accessible DOM and
+      // removing old one, there is reorder event for their parent.
+      id = "child3";
+      gQueue.push(new cloneAndAppendToDOM(id, kShowEvents, getFirstChild,
+                                          getParent));
+
+      // Hide event for accessible child of unaccessible removed DOM node and
+      // reorder event for its parent.
+      gQueue.push(new removeFromDOM(id, kHideEvents,
+                                    getNEnsureFirstChild, getParent));
+
+      // Hide events for accessible children of unaccessible removed DOM node
+      // and reorder event for its parent.
+      gQueue.push(new removeFromDOM("child4", kHideEvents,
+                                    getNEnsureChildren, getParent));
+
+      // Show/hide events by creating new accessible DOM node and replacing
+      // old one.
+      getAccessible("link6"); // ensure accessible is created
+      gQueue.push(new cloneAndReplaceInDOM("link6"));
+
+      // Show/hide events by changing class name on the parent node.
+      gQueue.push(new changeClass("container2", "link7", "", kShowEvents));
+      gQueue.push(new changeClass("container2", "link7", "displayNone",
+                                  kHideEvents));
+
+      gQueue.push(new changeClass("container3", "link8", "", kShowEvents));
+      gQueue.push(new changeClass("container3", "link8", "visibilityHidden",
+                                  kHideEvents));
+
+      gQueue.push(new test1("testContainer"));
+      gQueue.push(new test2("testContainer", "testContainer2"));
+      gQueue.push(new test2("testContainer", "testNestedContainer"));
+      gQueue.push(new test3("testContainer"));
+      gQueue.push(new insertReferredElm("testContainer3"));
+      gQueue.push(new showHiddenParentOfVisibleChild());
+
+      gQueue.push(new hideNDestroyDoc());
+      gQueue.push(new hideHideNDestroyDoc());
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=469985"
+     title=" turn the test from bug 354745 into mochitest">
+    Mozilla Bug 469985</a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=472662"
+     title="no reorder event when html:link display property is changed from 'none' to 'inline'">
+    Mozilla Bug 472662</a>
+  <a target="_blank"
+     title="Rework accessible tree update code"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=570275">
+    Mozilla Bug 570275</a>
+  <a target="_blank"
+     title="Develop a way to handle visibility style"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=606125">
+    Mozilla Bug 606125</a>
+  <a target="_blank"
+     title="Update accessible tree on content insertion after layout"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=498015">
+    Mozilla Bug 498015</a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+  <div id="eventdump"></div>
+
+  <div id="testContainer">
+    <a id="link1" href="http://www.google.com">Link #1</a>
+    <a id="link2" href="http://www.google.com">Link #2</a>
+    <a id="link3" href="http://www.google.com">Link #3</a>
+    <a id="link4" href="http://www.google.com" style="visibility:collapse">Link #4</a>
+    <a id="link5" href="http://www.google.com">Link #5</a>
+
+    <div id="container" role="list">
+      <span id="child1"></span>
+      <span id="child2" role="listitem"></span>
+      <span id="child3"><span role="listitem"></span></span>
+      <span id="child4"><span id="child4_1" role="listitem"></span><span id="child4_2" role="listitem"></span></span>
+    </div>
+
+    <a id="link6" href="http://www.google.com">Link #6</a>
+
+    <div id="container2" class="displayNone"><a id="link7">Link #7</a></div>
+    <div id="container3" class="visibilityHidden"><a id="link8">Link #8</a></div>
+    <div id="testNestedContainer"></div>
+  </div>
+  <div id="testContainer2"></div>
+  <div id="testContainer3"></div>
+
+  <div id="c4">
+    <div style="visibility:hidden" id="c4_middle">
+    <div style="visibility:visible" id="c4_child"></div>
+  </div>
+
+  <iframe id="c5" src="data:text/html,hey"></iframe>
+  <iframe id="c6" src="data:text/html,<label>l</label><label>l</label>"></iframe>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_namechange.html b/accessible/tests/mochitest/events/test_namechange.html
new file mode 100644
index 0000000000..840e2dfb4f
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_namechange.html
@@ -0,0 +1,185 @@
+<html>
+
+<head>
+  <title>Accessible name change event testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+
+  <script type="application/javascript">
+    let PromEvents = {};
+    Services.scriptloader.loadSubScript(
+      "chrome://mochitests/content/a11y/accessible/tests/mochitest/promisified-events.js",
+      PromEvents);
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    function setAttr(aID, aAttr, aValue, aChecker) {
+      this.eventSeq = [ aChecker ];
+      this.invoke = function setAttr_invoke() {
+        getNode(aID).setAttribute(aAttr, aValue);
+      };
+
+      this.getID = function setAttr_getID() {
+        return "set attr '" + aAttr + "', value '" + aValue + "'";
+      };
+    }
+
+    /**
+     * No name change on an accessible, because the accessible is recreated.
+     */
+    function setAttr_recreate(aID, aAttr, aValue) {
+      this.eventSeq = [
+        new invokerChecker(EVENT_HIDE, getAccessible(aID)),
+        new invokerChecker(EVENT_SHOW, aID),
+      ];
+      this.invoke = function setAttr_recreate_invoke() {
+        todo(false, "No accessible recreation should happen, just name change event");
+        getNode(aID).setAttribute(aAttr, aValue);
+      };
+
+      this.getID = function setAttr_recreate_getID() {
+        return "set attr '" + aAttr + "', value '" + aValue + "'";
+      };
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    // gA11yEventDumpToConsole = true; // debuggin
+
+    var gQueue = null;
+    async function doTests() {
+      gQueue = new eventQueue();
+      // Later tests use await.
+      let queueFinished = new Promise(resolve => {
+        gQueue.onFinish = function() {
+          resolve();
+          return DO_NOT_FINISH_TEST;
+        };
+      });
+
+      gQueue.push(new setAttr("tst1", "aria-label", "hi",
+                              new invokerChecker(EVENT_NAME_CHANGE, "tst1")));
+      gQueue.push(new setAttr("tst1", "alt", "alt",
+                              new unexpectedInvokerChecker(EVENT_NAME_CHANGE, "tst1")));
+      gQueue.push(new setAttr("tst1", "title", "title",
+                              new unexpectedInvokerChecker(EVENT_NAME_CHANGE, "tst1")));
+      gQueue.push(new setAttr("tst1", "aria-labelledby", "display",
+                              new invokerChecker(EVENT_NAME_CHANGE, "tst1")));
+
+      gQueue.push(new setAttr("tst2", "aria-labelledby", "display",
+                              new invokerChecker(EVENT_NAME_CHANGE, "tst2")));
+      gQueue.push(new setAttr("tst2", "alt", "alt",
+                              new unexpectedInvokerChecker(EVENT_NAME_CHANGE, "tst2")));
+      gQueue.push(new setAttr("tst2", "title", "title",
+                              new unexpectedInvokerChecker(EVENT_NAME_CHANGE, "tst2")));
+      gQueue.push(new setAttr("tst2", "aria-label", "hi",
+                              new unexpectedInvokerChecker(EVENT_NAME_CHANGE, "tst2")));
+
+      // When `alt` attribute is added or removed from a broken img,
+      // the accessible is recreated.
+      gQueue.push(new setAttr_recreate("tst3", "alt", "one"));
+      // When an `alt` attribute is changed, there is a name change event.
+      gQueue.push(new setAttr("tst3", "alt", "two",
+                              new invokerChecker(EVENT_NAME_CHANGE, "tst3")));
+      gQueue.push(new setAttr("tst3", "title", "title",
+                              new unexpectedInvokerChecker(EVENT_NAME_CHANGE, "tst3")));
+
+      gQueue.push(new setAttr("tst4", "title", "title",
+                              new invokerChecker(EVENT_NAME_CHANGE, "tst4")));
+
+      gQueue.invoke();
+      await queueFinished;
+      // Tests beyond this point use await rather than eventQueue.
+
+      const labelledBy = getNode("labelledBy");
+      const label = getNode("label");
+      let nameChanged = PromEvents.waitForEvent(EVENT_NAME_CHANGE, labelledBy);
+      info("Changing text of aria-labelledby target");
+      label.textContent = "l2";
+      await nameChanged;
+      nameChanged = PromEvents.waitForEvent(EVENT_NAME_CHANGE, labelledBy);
+      info("Adding node to aria-labelledby target");
+      label.innerHTML = '<p id="labelChild">l3</p>';
+      await nameChanged;
+      nameChanged = PromEvents.waitForEvent(EVENT_NAME_CHANGE, labelledBy);
+      info("Changing text of aria-labelledby target's child");
+      getNode("labelChild").textContent = "l4";
+      await nameChanged;
+
+      const lateLabelledBy = getNode("lateLabelledBy");
+      nameChanged = PromEvents.waitForEvent(EVENT_NAME_CHANGE, lateLabelledBy);
+      info("Setting aria-labelledby");
+      lateLabelledBy.setAttribute("aria-labelledby", "lateLabel");
+      await nameChanged;
+      nameChanged = PromEvents.waitForEvent(EVENT_NAME_CHANGE, lateLabelledBy);
+      info("Changing text of late aria-labelledby target's child");
+      getNode("lateLabelChild").textContent = "l2";
+      await nameChanged;
+
+      nameChanged = PromEvents.waitForEvent(EVENT_NAME_CHANGE, "listitem");
+      info("Changing textContent of listitem child");
+      // Changing textContent replaces the text leaf with a new one.
+      getNode("listitem").textContent = "world";
+      await nameChanged;
+
+      nameChanged = PromEvents.waitForEvent(EVENT_NAME_CHANGE, "button");
+      info("Changing text of button's text leaf");
+      // Changing the text node's data changes the text without replacing the
+      // leaf.
+      getNode("button").firstChild.data = "after";
+      await nameChanged;
+
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=991969"
+     title="Event not fired when description changes">
+    Bug 991969
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <img id="tst1" alt="initial" src="../moz.png">
+  <img id="tst2" src="../moz.png">
+  <img id="tst3">
+  <img id="tst4" src="../moz.png">
+
+  <div id="labelledBy" aria-labelledby="label"></div>
+  <div id="label">l1</div>
+
+  <div id="lateLabelledBy"></div>
+  <div id="lateLabel"><p id="lateLabelChild">l1</p></div>
+
+  <ul><li id="listitem">hello</li></ul>
+
+  <button id="button">before</button>
+
+  <div id="eventdump"></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_namechange.xhtml b/accessible/tests/mochitest/events/test_namechange.xhtml
new file mode 100644
index 0000000000..a6dd8cb218
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_namechange.xhtml
@@ -0,0 +1,90 @@
+<?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 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/chrome-harness.js"/>
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../events.js" />
+
+  <script type="application/javascript">
+  <![CDATA[
+
+    /**
+     * Check name changed a11y event.
+     */
+    function nameChangeChecker(aMsg, aID)
+    {
+      this.type = EVENT_NAME_CHANGE;
+
+      function targetGetter()
+      {
+        return getAccessible(aID);
+      }
+      Object.defineProperty(this, "target", { get: targetGetter });
+
+      this.getID = function getID()
+      {
+        return aMsg + " name changed";
+      }
+    }
+
+    function changeRichListItemChild()
+    {
+      this.invoke = function changeRichListItemChild_invoke()
+      {
+        getNode('childcontent').setAttribute('value', 'Changed.');
+      }
+
+      this.eventSeq =
+      [
+        new nameChangeChecker("changeRichListItemChild: ", "listitem")
+      ];
+
+      this.getID = function changeRichListItemChild_getID()
+      {
+        return "changeRichListItemChild";
+      }
+    }
+
+    function doTest()
+    {
+      var queue = new eventQueue();
+      queue.push(new changeRichListItemChild());
+      queue.invoke();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTest);
+  ]]>
+  </script>
+
+  <vbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+        href="https://bugzilla.mozilla.org/show_bug.cgi?id=986054"
+        title="Propagate name change events">
+       Mozilla Bug 986054
+      </a>
+
+      <p id="display"></p>
+      <div id="content" style="display: none">
+      </div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <richlistbox>
+      <richlistitem id="listitem">
+        <description id="childcontent" value="This will be changed."/>
+      </richlistitem>
+    </richlistbox>
+  </vbox>
+</window>
diff --git a/accessible/tests/mochitest/events/test_scroll.xhtml b/accessible/tests/mochitest/events/test_scroll.xhtml
new file mode 100644
index 0000000000..d3cc2a7bda
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_scroll.xhtml
@@ -0,0 +1,107 @@
+<?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 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/chrome-harness.js"/>
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../role.js" />
+  <script type="application/javascript"
+          src="../states.js" />
+  <script type="application/javascript"
+          src="../promisified-events.js" />
+  <script type="application/javascript"
+          src="../browser.js"></script>
+
+  <script type="application/javascript">
+  <![CDATA[
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Tests
+
+    function matchesAnchorJumpInTabDocument(aTabIdx) {
+      return evt => {
+        let tabDoc = aTabIdx ? tabDocumentAt(aTabIdx) : currentTabDocument();
+        let anchorAcc = getAccessible(tabDoc.querySelector("a[name='link1']"));
+        return anchorAcc == evt.accessible;
+      }
+    }
+
+    function matchesTabDocumentAt(aTabIdx) {
+      return evt => {
+        let tabDoc = aTabIdx ? tabDocumentAt(aTabIdx) : currentTabDocument();
+        return getAccessible(tabDoc) == evt.accessible;
+      }
+    }
+
+    async function doTest() {
+      const kURL = "http://mochi.test:8888/a11y/accessible/tests/mochitest/events/scroll.html#link1";
+      let evtProm = waitForEvents([
+        [EVENT_DOCUMENT_LOAD_COMPLETE, currentTabDocument],
+        [EVENT_SCROLLING_START, matchesAnchorJumpInTabDocument()],
+      ], "Load foreground tab then scroll to anchor");
+
+      tabBrowser().loadURI(Services.io.newURI(kURL), {
+        triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
+      });
+      // Flush layout, so as to guarantee that the a11y tree is constructed.
+      browserDocument().documentElement.getBoundingClientRect();
+      await evtProm;
+
+
+      evtProm = waitForEvents({
+        expected: [[EVENT_DOCUMENT_LOAD_COMPLETE, matchesTabDocumentAt(1)]],
+        unexpected: [[EVENT_SCROLLING_START, matchesAnchorJumpInTabDocument(1)]],
+      }, "Load background tab, don't dispatch scroll to anchor event");
+
+      tabBrowser().addTab(kURL, {
+        referrerURI: null,
+        charset: "",
+        postData: null,
+        inBackground: true,
+        triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
+      });
+      // Flush layout, so as to guarantee that the a11y tree is constructed.
+      browserDocument().documentElement.getBoundingClientRect();
+      await evtProm;
+
+      evtProm = waitForEvent(EVENT_SCROLLING_START,
+        matchesAnchorJumpInTabDocument(),
+        "Scroll to anchor event dispatched when switching to loaded doc.");
+      tabBrowser().selectTabAtIndex(1);
+      await evtProm;
+
+      closeBrowserWindow();
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    openBrowserWindow(doTest);
+  ]]>
+  </script>
+
+  <vbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=691734"
+         title="Make sure scrolling start event is fired when document receive focus">
+        Mozilla Bug 691734
+      </a>
+
+      <p id="display"></p>
+      <div id="content" style="display: none">
+      </div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <vbox id="eventdump"></vbox>
+  </vbox>
+</window>
diff --git a/accessible/tests/mochitest/events/test_scroll_caret.xhtml b/accessible/tests/mochitest/events/test_scroll_caret.xhtml
new file mode 100644
index 0000000000..f0f0fccfb2
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_scroll_caret.xhtml
@@ -0,0 +1,91 @@
+<?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 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/chrome-harness.js"/>
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../role.js" />
+  <script type="application/javascript"
+          src="../states.js" />
+  <script type="application/javascript"
+          src="../events.js" />
+  <script type="application/javascript"
+          src="../browser.js"></script>
+
+  <script type="application/javascript">
+  <![CDATA[
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Tests
+
+    function getAnchorJumpInTabDocument(aTabIdx)
+    {
+      var tabDoc = aTabIdx ? tabDocumentAt(aTabIdx) : currentTabDocument();
+      return tabDoc.querySelector("h1[id='heading_1']");
+    }
+
+    function loadTab(aURL)
+    {
+      this.eventSeq = [
+        new asyncInvokerChecker(EVENT_DOCUMENT_LOAD_COMPLETE, currentTabDocument),
+        new asyncCaretMoveChecker(0, getAnchorJumpInTabDocument)
+      ];
+
+      this.invoke = function loadTab_invoke()
+      {
+        tabBrowser().loadURI(Services.io.newURI(aURL), {
+          triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
+        });
+      }
+
+      this.getID = function loadTab_getID()
+      {
+        return "load tab: " + aURL;
+      }
+    }
+
+    //gA11yEventDumpToConsole = true; // debug stuff
+
+    var gQueue = null;
+    function doTest()
+    {
+      gQueue = new eventQueue();
+
+      var url = "http://mochi.test:8888/a11y/accessible/tests/mochitest/events/scroll.html#heading_1";
+      gQueue.push(new loadTab(url));
+      gQueue.onFinish = function() { closeBrowserWindow(); }
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    openBrowserWindow(doTest);
+  ]]>
+  </script>
+
+  <vbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=1056459"
+         title="Make sure caret move event is fired when document receive focus">
+        Mozilla Bug 1056459
+      </a>
+
+      <p id="display"></p>
+      <div id="content" style="display: none">
+      </div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <vbox id="eventdump"></vbox>
+  </vbox>
+</window>
diff --git a/accessible/tests/mochitest/events/test_selection.html b/accessible/tests/mochitest/events/test_selection.html
new file mode 100644
index 0000000000..a749dd9c4c
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_selection.html
@@ -0,0 +1,109 @@
+<html>
+
+<head>
+  <title>Accessible selection event testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+
+  <script type="application/javascript">
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    // gA11yEventDumpToConsole = true; // debuggin
+
+    var gQueue = null;
+    function doTests() {
+      gQueue = new eventQueue();
+
+
+      // closed combobox
+      gQueue.push(new synthFocus("combobox"));
+      gQueue.push(new synthDownKey("cb1_item1",
+                                   selChangeSeq("cb1_item1", "cb1_item2")));
+
+      // listbox
+      gQueue.push(new synthClick("lb1_item1",
+                                 new invokerChecker(EVENT_SELECTION, "lb1_item1")));
+      gQueue.push(new synthDownKey("lb1_item1",
+                                   selChangeSeq("lb1_item1", "lb1_item2")));
+
+      // multiselectable listbox
+      gQueue.push(new synthClick("lb2_item1",
+                                 selChangeSeq(null, "lb2_item1")));
+      gQueue.push(new synthDownKey("lb2_item1",
+                                   selAddSeq("lb2_item2"),
+                                   { shiftKey: true }));
+      gQueue.push(new synthUpKey("lb2_item2",
+                                 selRemoveSeq("lb2_item2"),
+                                 { shiftKey: true }));
+      gQueue.push(new synthKey("lb2_item1", " ", { ctrlKey: true },
+                               selRemoveSeq("lb2_item1")));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=414302"
+     title="Incorrect selection events in HTML, XUL and ARIA">
+    Bug 414302
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=810268"
+     title="There's no way to know unselected item when selection in single selection was changed">
+    Bug 810268
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <select id="combobox">
+    <option id="cb1_item1" value="mushrooms">mushrooms
+    <option id="cb1_item2" value="greenpeppers">green peppers
+    <option id="cb1_item3" value="onions" id="onions">onions
+    <option id="cb1_item4" value="tomatoes">tomatoes
+    <option id="cb1_item5" value="olives">olives
+  </select>
+
+  <select id="listbox" size=5>
+    <option id="lb1_item1" value="mushrooms">mushrooms
+    <option id="lb1_item2" value="greenpeppers">green peppers
+    <option id="lb1_item3" value="onions" id="onions">onions
+    <option id="lb1_item4" value="tomatoes">tomatoes
+    <option id="lb1_item5" value="olives">olives
+  </select>
+
+  <p>Pizza</p>
+  <select id="listbox2" multiple size=5>
+    <option id="lb2_item1" value="mushrooms">mushrooms
+    <option id="lb2_item2" value="greenpeppers">green peppers
+    <option id="lb2_item3" value="onions" id="onions">onions
+    <option id="lb2_item4" value="tomatoes">tomatoes
+    <option id="lb2_item5" value="olives">olives
+  </select>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_selection.xhtml b/accessible/tests/mochitest/events/test_selection.xhtml
new file mode 100644
index 0000000000..9c34ddf286
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_selection.xhtml
@@ -0,0 +1,254 @@
+<?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 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        title="Selection event tests">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"/>
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../role.js" />
+  <script type="application/javascript"
+          src="../states.js" />
+  <script type="application/javascript"
+          src="../events.js" />
+
+  <script type="application/javascript">
+    function advanceTab(aTabsID, aDirection, aNextTabID)
+    {
+      var eventSeq1 = [
+        new invokerChecker(EVENT_SELECTION, aNextTabID)
+      ]
+      defineScenario(this, eventSeq1);
+
+      var eventSeq2 = [
+        new invokerChecker(EVENT_HIDE, getAccessible(aNextTabID)),
+        new invokerChecker(EVENT_SHOW, aNextTabID)
+      ];
+      defineScenario(this, eventSeq2);
+
+      this.invoke = function advanceTab_invoke()
+      {
+        todo(false, "No accessible recreation should happen, just selection event");
+        getNode(aTabsID).advanceSelectedTab(aDirection, true);
+      }
+
+      this.getID = function synthFocus_getID()
+      {
+        return "advanceTab on " + prettyName(aTabsID) + " to " + prettyName(aNextTabID);
+      }
+    }
+
+    function select4FirstItems(aID)
+    {
+      this.listboxNode = getNode(aID);
+      this.eventSeq = [
+        new invokerChecker(EVENT_SELECTION_ADD, this.listboxNode.getItemAtIndex(0)),
+        new invokerChecker(EVENT_SELECTION_ADD, this.listboxNode.getItemAtIndex(1)),
+        new invokerChecker(EVENT_SELECTION_ADD, this.listboxNode.getItemAtIndex(2)),
+        new invokerChecker(EVENT_SELECTION_ADD, this.listboxNode.getItemAtIndex(3))
+      ];
+
+      this.invoke = function select4FirstItems_invoke()
+      {
+        synthesizeKey("VK_DOWN", { shiftKey: true }); // selects two items
+        synthesizeKey("VK_DOWN", { shiftKey: true });
+        synthesizeKey("VK_DOWN", { shiftKey: true });
+      }
+
+      this.getID = function select4FirstItems_getID()
+      {
+        return "select 4 first items for " + prettyName(aID);
+      }
+    }
+
+    function unselect4FirstItems(aID)
+    {
+      this.listboxNode = getNode(aID);
+      this.eventSeq = [
+        new invokerChecker(EVENT_SELECTION_REMOVE, this.listboxNode.getItemAtIndex(3)),
+        new invokerChecker(EVENT_SELECTION_REMOVE, this.listboxNode.getItemAtIndex(2)),
+        new invokerChecker(EVENT_SELECTION_REMOVE, this.listboxNode.getItemAtIndex(1)),
+        new invokerChecker(EVENT_SELECTION_REMOVE, this.listboxNode.getItemAtIndex(0))
+      ];
+
+      this.invoke = function unselect4FirstItems_invoke()
+      {
+        synthesizeKey("VK_UP", { shiftKey: true });
+        synthesizeKey("VK_UP", { shiftKey: true });
+        synthesizeKey("VK_UP", { shiftKey: true });
+        synthesizeKey(" ", { ctrlKey: true }); // unselect first item
+      }
+
+      this.getID = function unselect4FirstItems_getID()
+      {
+        return "unselect 4 first items for " + prettyName(aID);
+      }
+    }
+
+    function selectAllItems(aID)
+    {
+      this.listboxNode = getNode(aID);
+      this.eventSeq = [
+        new invokerChecker(EVENT_SELECTION_WITHIN, getAccessible(this.listboxNode))
+      ];
+
+      this.invoke = function selectAllItems_invoke()
+      {
+        synthesizeKey("VK_END", { shiftKey: true });
+      }
+
+      this.getID = function selectAllItems_getID()
+      {
+        return "select all items for " + prettyName(aID);
+      }
+    }
+
+    function unselectAllItemsButFirst(aID)
+    {
+      this.listboxNode = getNode(aID);
+      this.eventSeq = [
+        new invokerChecker(EVENT_SELECTION_WITHIN, getAccessible(this.listboxNode))
+      ];
+
+      this.invoke = function unselectAllItemsButFirst_invoke()
+      {
+        synthesizeKey("VK_HOME", { shiftKey: true });
+      }
+
+      this.getID = function unselectAllItemsButFirst_getID()
+      {
+        return "unselect all items for " + prettyName(aID);
+      }
+    }
+
+    function unselectSelectItem(aID)
+    {
+      this.listboxNode = getNode(aID);
+      this.eventSeq = [
+        new invokerChecker(EVENT_SELECTION_REMOVE, this.listboxNode.getItemAtIndex(0)),
+        new invokerChecker(EVENT_SELECTION_ADD, this.listboxNode.getItemAtIndex(0))
+      ];
+
+      this.invoke = function unselectSelectItem_invoke()
+      {
+        synthesizeKey(" ", { ctrlKey: true }); // select item
+        synthesizeKey(" ", { ctrlKey: true }); // unselect item
+      }
+
+      this.getID = function unselectSelectItem_getID()
+      {
+        return "unselect and then select first item for " + prettyName(aID);
+      }
+    }
+
+    /**
+     * Do tests.
+     */
+    var gQueue = null;
+
+    //enableLogging("events");
+    //gA11yEventDumpToConsole = true; // debuggin
+
+    function doTests()
+    {
+      gQueue = new eventQueue();
+
+      //////////////////////////////////////////////////////////////////////////
+      // tabbox
+      gQueue.push(new advanceTab("tabs", 1, "tab3"));
+
+      //////////////////////////////////////////////////////////////////////////
+      // single selection listbox, the first item is selected by default
+
+      gQueue.push(new synthClick("lb1_item2",
+                                 new invokerChecker(EVENT_SELECTION, "lb1_item2")));
+      gQueue.push(new synthUpKey("lb1_item2",
+                                   new invokerChecker(EVENT_SELECTION, "lb1_item1")));
+      gQueue.push(new synthDownKey("lb1_item1",
+                                   new invokerChecker(EVENT_SELECTION, "lb1_item2")));
+
+      //////////////////////////////////////////////////////////////////////////
+      // multiselectable listbox
+      gQueue.push(new synthClick("lb2_item1",
+                                 new invokerChecker(EVENT_SELECTION, "lb2_item1")));
+      gQueue.push(new synthDownKey("lb2_item1",
+                                   new invokerChecker(EVENT_SELECTION_ADD, "lb2_item2"),
+                                   { shiftKey: true }));
+      gQueue.push(new synthUpKey("lb2_item2",
+                                 new invokerChecker(EVENT_SELECTION_REMOVE, "lb2_item2"),
+                                 { shiftKey: true }));
+      gQueue.push(new synthKey("lb2_item1", " ", { ctrlKey: true },
+                               new invokerChecker(EVENT_SELECTION_REMOVE, "lb2_item1")));
+
+      //////////////////////////////////////////////////////////////////////////
+      // selection event coalescence
+
+      // fire 4 selection_add events
+      gQueue.push(new select4FirstItems("listbox2"));
+      // fire 4 selection_remove events
+      gQueue.push(new unselect4FirstItems("listbox2"));
+      // fire selection_within event
+      gQueue.push(new selectAllItems("listbox2"));
+      // fire selection_within event
+      gQueue.push(new unselectAllItemsButFirst("listbox2"));
+      // fire selection_remove/add events
+      gQueue.push(new unselectSelectItem("listbox2"));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+
+  <hbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=414302"
+         title="Incorrect selection events in HTML, XUL and ARIA">
+        Mozilla Bug 414302
+      </a>
+      <p id="display"></p>
+      <div id="content" style="display: none"></div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <tabbox id="tabbox" selectedIndex="1">
+      <tabs id="tabs">
+        <tab id="tab1" label="tab1"/>
+        <tab id="tab2" label="tab2"/>
+        <tab id="tab3" label="tab3"/>
+        <tab id="tab4" label="tab4"/>
+      </tabs>
+      <tabpanels>
+        <tabpanel><!-- tabpanel First elements go here --></tabpanel>
+        <tabpanel><button id="b1" label="b1"/></tabpanel>
+        <tabpanel><button id="b2" label="b2"/></tabpanel>
+        <tabpanel></tabpanel>
+      </tabpanels>
+    </tabbox>
+
+    <richlistbox id="listbox">
+      <richlistitem id="lb1_item1"><label value="item1"/></richlistitem>
+      <richlistitem id="lb1_item2"><label value="item2"/></richlistitem>
+    </richlistbox>
+
+    <richlistbox id="listbox2" seltype="multiple">
+      <richlistitem id="lb2_item1"><label value="item1"/></richlistitem>
+      <richlistitem id="lb2_item2"><label value="item2"/></richlistitem>
+      <richlistitem id="lb2_item3"><label value="item3"/></richlistitem>
+      <richlistitem id="lb2_item4"><label value="item4"/></richlistitem>
+      <richlistitem id="lb2_item5"><label value="item5"/></richlistitem>
+      <richlistitem id="lb2_item6"><label value="item6"/></richlistitem>
+      <richlistitem id="lb2_item7"><label value="item7"/></richlistitem>
+    </richlistbox>
+
+  </hbox>
+</window>
diff --git a/accessible/tests/mochitest/events/test_selection_aria.html b/accessible/tests/mochitest/events/test_selection_aria.html
new file mode 100644
index 0000000000..c479868e03
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_selection_aria.html
@@ -0,0 +1,122 @@
+<html>
+
+<head>
+  <title>ARIA selection event testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+
+  <script type="application/javascript">
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    function selectItem(aSelectID, aItemID) {
+      this.selectNode = getNode(aSelectID);
+      this.itemNode = getNode(aItemID);
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_SELECTION, aItemID),
+      ];
+
+      this.invoke = function selectItem_invoke() {
+        var itemNode = this.selectNode.querySelector("*[aria-selected='true']");
+        if (itemNode)
+          itemNode.removeAttribute("aria-selected");
+
+        this.itemNode.setAttribute("aria-selected", "true");
+      };
+
+      this.getID = function selectItem_getID() {
+        return "select item " + prettyName(aItemID);
+      };
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    var gQueue = null;
+
+    // gA11yEventDumpToConsole = true; // debug stuff
+
+    function doTests() {
+      gQueue = new eventQueue();
+
+      gQueue.push(new selectItem("tablist", "tab1"));
+      gQueue.push(new selectItem("tablist", "tab2"));
+
+      gQueue.push(new selectItem("tree", "treeitem1"));
+      gQueue.push(new selectItem("tree", "treeitem1a"));
+      gQueue.push(new selectItem("tree", "treeitem1a1"));
+
+      gQueue.push(new selectItem("tree2", "tree2item1"));
+      gQueue.push(new selectItem("tree2", "tree2item1a"));
+      gQueue.push(new selectItem("tree2", "tree2item1a1"));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=569653"
+     title="Make selection events async">
+    Mozilla Bug 569653
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=804040"
+     title="Selection event not fired when selection of ARIA tab changes">
+    Mozilla Bug 804040
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div role="tablist" id="tablist">
+    <div role="tab" id="tab1">tab1</div>
+    <div role="tab" id="tab2">tab2</div>
+  </div>
+
+  <div id="tree" role="tree">
+    <div id="treeitem1" role="treeitem">Canada
+      <div id="treeitem1a" role="treeitem">- Ontario
+        <div id="treeitem1a1" role="treeitem">-- Toronto</div>
+      </div>
+      <div id="treeitem1b" role="treeitem">- Manitoba</div>
+    </div>
+    <div id="treeitem2" role="treeitem">Germany</div>
+    <div id="treeitem3" role="treeitem">Russia</div>
+  </div>
+
+  <div id="tree2" role="tree" aria-multiselectable="true">
+    <div id="tree2item1" role="treeitem">Canada
+      <div id="tree2item1a" role="treeitem">- Ontario
+        <div id="tree2item1a1" role="treeitem">-- Toronto</div>
+      </div>
+      <div id="tree2item1b" role="treeitem">- Manitoba</div>
+    </div>
+    <div id="tree2item2" role="treeitem">Germany</div>
+    <div id="tree2item3" role="treeitem">Russia</div>
+  </div>
+
+  <div id="eventdump"></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_statechange.html b/accessible/tests/mochitest/events/test_statechange.html
new file mode 100644
index 0000000000..e8ec08a4b3
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_statechange.html
@@ -0,0 +1,582 @@
+<html>
+
+<head>
+  <title>Accessible state change event testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../promisified-events.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+
+  <script type="application/javascript">
+    async function openNode(aIDDetails, aIDSummary, aIsOpen) {
+      let p = waitForStateChange(aIDSummary, STATE_EXPANDED, aIsOpen, false);
+      if (aIsOpen) {
+        getNode(aIDDetails).setAttribute("open", "");
+      } else {
+        getNode(aIDDetails).removeAttribute("open");
+      }
+      await p;
+    }
+
+    async function makeEditableDoc(aDocNode, aIsEnabled) {
+      let p = waitForStateChange(aDocNode, EXT_STATE_EDITABLE, true, true);
+      aDocNode.designMode = "on";
+      await p;
+    }
+
+    async function invalidInput(aNodeOrID) {
+      let p = waitForStateChange(aNodeOrID, STATE_INVALID, true, false);
+      getNode(aNodeOrID).value = "I am not an email";
+      await p;
+    }
+
+    async function changeCheckInput(aID, aIsChecked) {
+      let p = waitForStateChange(aID, STATE_CHECKED, aIsChecked, false);
+      getNode(aID).checked = aIsChecked;
+      await p;
+    }
+
+    async function changeRequiredState(aID, aIsRequired) {
+      let p = waitForStateChange(aID, STATE_REQUIRED, aIsRequired, false);
+      getNode(aID).required = aIsRequired;
+      await p;
+    }
+
+    async function stateChangeOnFileInput(aID, aAttr, aValue,
+                                    aState, aIsExtraState, aIsEnabled) {
+      let fileControlNode = getNode(aID);
+      let fileControl = getAccessible(fileControlNode);
+      let browseButton = fileControl.firstChild;
+      let p = waitForEvents([
+        stateChangeEventArgs(fileControl, aState, aIsEnabled, aIsExtraState),
+        stateChangeEventArgs(browseButton, aState, aIsEnabled, aIsExtraState)])
+      fileControlNode.setAttribute(aAttr, aValue);
+      await p;
+    }
+
+    function toggleSentinel() {
+      let sentinel = getNode("sentinel");
+      if (sentinel.hasAttribute("aria-busy"))  {
+        sentinel.removeAttribute("aria-busy");
+      } else {
+        sentinel.setAttribute("aria-busy", "true");
+      }
+    }
+
+    async function toggleStateChange(aID, aAttr, aState, aIsExtraState) {
+      let p = waitForEvents([
+        stateChangeEventArgs(aID, aState, true, aIsExtraState),
+        [EVENT_STATE_CHANGE, "sentinel"]
+        ]);
+      getNode(aID).setAttribute(aAttr, "true");
+      toggleSentinel();
+      await p;
+      p = waitForEvents([
+        stateChangeEventArgs(aID, aState, false, aIsExtraState),
+        [EVENT_STATE_CHANGE, "sentinel"]
+        ]);
+      getNode(aID).setAttribute(aAttr, "false");
+      toggleSentinel();
+      await p;
+    }
+
+    async function dupeStateChange(aID, aAttr, aValue,
+                             aState, aIsExtraState, aIsEnabled) {
+      let p = waitForEvents([
+        stateChangeEventArgs(aID, aState, aIsEnabled, aIsExtraState),
+        [EVENT_STATE_CHANGE, "sentinel"]
+        ]);
+      getNode(aID).setAttribute(aAttr, aValue);
+      getNode(aID).setAttribute(aAttr, aValue);
+      toggleSentinel();
+      await p;
+    }
+
+    async function oppositeStateChange(aID, aAttr, aState, aIsExtraState) {
+      let p = waitForEvents({
+        expected: [[EVENT_STATE_CHANGE, "sentinel"]],
+        unexpected: [
+          stateChangeEventArgs(aID, aState, false, aIsExtraState),
+          stateChangeEventArgs(aID, aState, true, aIsExtraState)
+        ]
+      });
+      getNode(aID).setAttribute(aAttr, "false");
+      getNode(aID).setAttribute(aAttr, "true");
+      toggleSentinel();
+      await p;
+    }
+
+    /**
+     * Change concomitant ARIA and native attribute at once.
+     */
+    async function echoingStateChange(aID, aARIAAttr, aAttr, aValue,
+                                      aState, aIsExtraState, aIsEnabled) {
+      let p = waitForStateChange(aID, aState, aIsEnabled, aIsExtraState);
+      if (aValue == null) {
+        getNode(aID).removeAttribute(aARIAAttr);
+        getNode(aID).removeAttribute(aAttr);
+      } else {
+        getNode(aID).setAttribute(aARIAAttr, aValue);
+        getNode(aID).setAttribute(aAttr, aValue);
+      }
+      await p;
+    }
+
+    async function testLinked() {
+      let p = waitForStateChange("link1", STATE_LINKED, false, false);
+      getNode("link1").removeAttribute("href");
+      await p;
+
+      p = waitForStateChange("link2", STATE_LINKED, false, false);
+      getNode("link2").removeAttribute("onclick");
+      await p;
+
+      p = waitForStateChange("link3", STATE_LINKED, true, false);
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      getNode("link3").setAttribute("href", "http://example.com");
+      await p;
+    }
+
+    async function testHasPopup() {
+      let p = waitForStateChange("popupButton", STATE_HASPOPUP, true, false);
+      getNode("popupButton").setAttribute("aria-haspopup", "true");
+      await p;
+
+      p = waitForStateChange("popupButton", STATE_HASPOPUP, false, false);
+      getNode("popupButton").setAttribute("aria-haspopup", "false");
+      await p;
+
+      p = waitForStateChange("popupButton", STATE_HASPOPUP, true, false);
+      getNode("popupButton").setAttribute("aria-haspopup", "true");
+      await p;
+
+      p = waitForStateChange("popupButton", STATE_HASPOPUP, false, false);
+      getNode("popupButton").removeAttribute("aria-haspopup");
+      await p;
+    }
+
+    async function testDefaultSubmitChange() {
+      testStates("default-button",
+        STATE_DEFAULT, 0,
+        0, 0,
+        "button should have DEFAULT state");
+      let button = document.createElement("button");
+      button.textContent = "new default";
+      let p = waitForStateChange("default-button", STATE_DEFAULT, false, false);
+      getNode("default-button").before(button);
+      await p;
+      testStates("default-button",
+        0, 0,
+        STATE_DEFAULT, 0,
+        "button should not have DEFAULT state");
+      p = waitForStateChange("default-button", STATE_DEFAULT, true, false);
+      button.remove();
+      await p;
+      testStates("default-button",
+        STATE_DEFAULT, 0,
+        0, 0,
+        "button should have DEFAULT state");
+    }
+
+    async function testReadOnly() {
+      let p = waitForStateChange("email", STATE_READONLY, true, false);
+      getNode("email").setAttribute("readonly", "true");
+      await p;
+      p = waitForStateChange("email", STATE_READONLY, false, false);
+      getNode("email").removeAttribute("readonly");
+      await p;
+    }
+
+    async function testReadonlyUntilEditable() {
+      testStates("article",
+        STATE_READONLY, 0,
+        0, EXT_STATE_EDITABLE,
+        "article is READONLY and not EDITABLE");
+      let p = waitForEvents([
+        stateChangeEventArgs("article", STATE_READONLY, false, false),
+        stateChangeEventArgs("article", EXT_STATE_EDITABLE, true, true)]);
+      getNode("article").contentEditable = "true";
+      await p;
+      testStates("article",
+        0, EXT_STATE_EDITABLE,
+        STATE_READONLY, 0,
+        "article is EDITABLE and not READONLY");
+      p = waitForEvents([
+        stateChangeEventArgs("article", STATE_READONLY, true, false),
+        stateChangeEventArgs("article", EXT_STATE_EDITABLE, false, true)]);
+      getNode("article").contentEditable = "false";
+      await p;
+      testStates("article",
+        STATE_READONLY, 0,
+        0, EXT_STATE_EDITABLE,
+        "article is READONLY and not EDITABLE");
+    }
+
+    async function testAnimatedImage() {
+      testStates("animated-image",
+        STATE_ANIMATED, 0,
+        0, 0,
+        "image should be animated 1");
+      let p = waitForStateChange("animated-image", STATE_ANIMATED, false, false);
+      getNode("animated-image").src = "../animated-gif-finalframe.gif";
+      await p;
+      testStates("animated-image",
+        0, 0,
+        STATE_ANIMATED, 0,
+        "image should not be animated 2");
+      p = waitForStateChange("animated-image", STATE_ANIMATED, true, false);
+      getNode("animated-image").src = "../animated-gif.gif";
+      await p;
+      testStates("animated-image",
+        STATE_ANIMATED, 0,
+        0, 0,
+        "image should be animated 3");
+    }
+
+    async function testImageLoad() {
+      let img = document.createElement("img");
+      img.id = "image";
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      img.src = "http://example.com/a11y/accessible/tests/mochitest/events/slow_image.sjs";
+      let p = waitForEvent(EVENT_SHOW, "image");
+      getNode("eventdump").before(img);
+      await p;
+      testStates("image",
+        STATE_INVISIBLE, 0,
+        0, 0,
+        "image should be invisible");
+      p = waitForStateChange("image", STATE_INVISIBLE, false, false);
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      await fetch("http://example.com/a11y/accessible/tests/mochitest/events/slow_image.sjs?complete");
+      await p;
+      testStates("image",
+        0, 0,
+        STATE_INVISIBLE, 0,
+        "image should be invisible");
+    }
+    
+    async function testMultiSelectable(aID, aAttribute) {
+      testStates(aID,
+        0, 0,
+        STATE_MULTISELECTABLE | STATE_EXTSELECTABLE, 0,
+        `${aID} should not be multiselectable`);
+      let p = waitForEvents([
+        stateChangeEventArgs(aID, STATE_MULTISELECTABLE, true, false),
+        stateChangeEventArgs(aID, STATE_EXTSELECTABLE, true, false),
+      ]);
+      getNode(aID).setAttribute(aAttribute, true);
+      await p;
+      testStates(aID,
+        STATE_MULTISELECTABLE | STATE_EXTSELECTABLE, 0,
+        0, 0,
+        `${aID} should not be multiselectable`);
+      p = waitForEvents([
+        stateChangeEventArgs(aID, STATE_MULTISELECTABLE, false, false),
+        stateChangeEventArgs(aID, STATE_EXTSELECTABLE, false, false),
+      ]);
+      getNode(aID).removeAttribute(aAttribute);
+      await p;
+      testStates(aID,
+        0, 0,
+        STATE_MULTISELECTABLE | STATE_EXTSELECTABLE, 0,
+        `${aID} should not be multiselectable`);
+    }
+
+    async function testAutocomplete() {
+      // A text input will have autocomplete via browser's form autofill...
+      testStates("input",
+        0, EXT_STATE_SUPPORTS_AUTOCOMPLETION,
+        0, 0,
+        "input supports autocompletion");
+      // unless it is explicitly turned off.
+      testStates("input-autocomplete-off",
+        0, 0,
+        0, EXT_STATE_SUPPORTS_AUTOCOMPLETION,
+        "input-autocomplete-off does not support autocompletion");
+      // An input with a datalist will always have autocomplete.
+      testStates("input-list",
+        0, EXT_STATE_SUPPORTS_AUTOCOMPLETION,
+        0, 0,
+        "input-list supports autocompletion");
+      // password fields don't get autocomplete.
+      testStates("input-password",
+        0, 0,
+        0, EXT_STATE_SUPPORTS_AUTOCOMPLETION,
+        "input-autocomplete-off does not support autocompletion");
+
+      let p = waitForEvents({
+        expected: [
+          // Setting the form's autocomplete attribute to "off" will cause
+          // "input" to lost its autocomplete state.
+          stateChangeEventArgs("input", EXT_STATE_SUPPORTS_AUTOCOMPLETION, false, true)
+        ],
+        unexpected: [
+          // "input-list" should preserve its autocomplete state regardless of
+          // forms "autocomplete" attribute
+          [EVENT_STATE_CHANGE, "input-list"],
+          // "input-autocomplete-off" already has its autocomplte off, so no state
+          // change here.
+          [EVENT_STATE_CHANGE, "input-autocomplete-off"],
+          // passwords never get autocomplete
+          [EVENT_STATE_CHANGE, "input-password"],
+        ]
+      });
+
+      getNode("form").setAttribute("autocomplete", "off");
+
+      await p;
+
+      // Same when we remove the form's autocomplete attribute.
+      p = waitForEvents({
+        expected: [stateChangeEventArgs("input", EXT_STATE_SUPPORTS_AUTOCOMPLETION, true, true)],
+        unexpected: [
+          [EVENT_STATE_CHANGE, "input-list"],
+          [EVENT_STATE_CHANGE, "input-autocomplete-off"],
+          [EVENT_STATE_CHANGE, "input-password"],
+        ]
+      });
+
+      getNode("form").removeAttribute("autocomplete");
+
+      await p;
+
+      p = waitForEvents({
+        expected: [
+          // Forcing autocomplete off on an input will cause a state change
+          stateChangeEventArgs("input", EXT_STATE_SUPPORTS_AUTOCOMPLETION, false, true),
+          // Associating a datalist with an autocomplete=off input
+          // will give it an autocomplete state, regardless.
+          stateChangeEventArgs("input-autocomplete-off", EXT_STATE_SUPPORTS_AUTOCOMPLETION, true, true),
+          // XXX: datalist inputs also get a HASPOPUP state, the inconsistent
+          // use of that state is inexplicable, but lets make sure we fire state
+          // change events for it anyway.
+          stateChangeEventArgs("input-autocomplete-off", STATE_HASPOPUP, true, false),
+        ],
+        unexpected: [
+          // Forcing autocomplete off with a dataset input does nothing.
+          [EVENT_STATE_CHANGE, "input-list"],
+          // passwords never get autocomplete
+          [EVENT_STATE_CHANGE, "input-password"],
+        ]
+      });
+
+      getNode("input").setAttribute("autocomplete", "off");
+      getNode("input-list").setAttribute("autocomplete", "off");
+      getNode("input-autocomplete-off").setAttribute("list", "browsers");
+      getNode("input-password").setAttribute("autocomplete", "off");
+
+      await p;
+    }
+
+    async function doTests() {
+      // Test opening details objects
+      await openNode("detailsOpen", "summaryOpen", true);
+      await openNode("detailsOpen", "summaryOpen", false);
+      await openNode("detailsOpen1", "summaryOpen1", true);
+      await openNode("detailsOpen2", "summaryOpen2", true);
+      await openNode("detailsOpen3", "summaryOpen3", true);
+      await openNode("detailsOpen4", "summaryOpen4", true);
+      await openNode("detailsOpen5", "summaryOpen5", true);
+      await openNode("detailsOpen6", "summaryOpen6", true);
+
+      // Test delayed editable state change
+      var doc = document.getElementById("iframe").contentDocument;
+      await makeEditableDoc(doc);
+
+      // invalid state change
+      await invalidInput("email");
+
+      // checked state change
+      await changeCheckInput("checkbox", true);
+      await changeCheckInput("checkbox", false);
+      await changeCheckInput("radio", true);
+      await changeCheckInput("radio", false);
+
+      // required state change
+      await changeRequiredState("checkbox", true);
+
+      // file input inherited state changes
+      await stateChangeOnFileInput("file", "aria-busy", "true",
+                                   STATE_BUSY, false, true);
+      await stateChangeOnFileInput("file", "aria-required", "true",
+                                   STATE_REQUIRED, false, true);
+      await stateChangeOnFileInput("file", "aria-invalid", "true",
+                                   STATE_INVALID, false, true);
+
+      await dupeStateChange("div", "aria-busy", "true",
+                            STATE_BUSY, false, true);
+      await oppositeStateChange("div", "aria-busy",
+                                STATE_BUSY, false);
+
+      await echoingStateChange("text1", "aria-disabled", "disabled", "true",
+                               EXT_STATE_ENABLED, true, false);
+      await echoingStateChange("text1", "aria-disabled", "disabled", null,
+                               EXT_STATE_ENABLED, true, true);
+
+      await testReadOnly();
+
+      await testReadonlyUntilEditable();
+
+      await testLinked();
+
+      await testHasPopup();
+
+      await toggleStateChange("textbox", "aria-multiline", EXT_STATE_MULTI_LINE, true);
+
+      await testDefaultSubmitChange();
+
+      await testAnimatedImage();
+
+      await testImageLoad();
+
+      await testMultiSelectable("listbox", "aria-multiselectable");
+
+      await testMultiSelectable("select", "multiple");
+
+      await testAutocomplete();
+
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+<style>
+  details.openBefore::before{
+    content: "before detail content: ";
+    background: blue;
+  }
+  summary.openBefore::before{
+    content: "before summary content: ";
+    background: green;
+  }
+  details.openAfter::after{
+    content: " :after detail content";
+    background: blue;
+  }
+  summary.openAfter::after{
+    content: " :after summary content";
+    background: green;
+  }
+</style>
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=564471"
+     title="Make state change events async">
+    Bug 564471
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=555728"
+     title="Fire a11y event based on HTML5 constraint validation">
+    Bug 555728
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=699017"
+     title="File input control should be propogate states to descendants">
+    Bug 699017
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=788389"
+     title="Fire statechange event whenever checked state is changed not depending on focused state">
+    Bug 788389
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=926812"
+     title="State change event not fired when both disabled and aria-disabled are toggled">
+    Bug 926812
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <!-- open -->
+  <details id="detailsOpen"><summary id="summaryOpen">open</summary>details can be opened</details>
+  <details id="detailsOpen1">order doesn't matter<summary id="summaryOpen1">open</summary></details>
+  <details id="detailsOpen2"><div>additional elements don't matter</div><summary id="summaryOpen2">open</summary></details>
+  <details id="detailsOpen3" class="openBefore"><summary id="summaryOpen3">summary</summary>content</details>
+  <details id="detailsOpen4" class="openAfter"><summary id="summaryOpen4">summary</summary>content</details>
+  <details id="detailsOpen5"><summary id="summaryOpen5" class="openBefore">summary</summary>content</details>
+  <details id="detailsOpen6"><summary id="summaryOpen6" class="openAfter">summary</summary>content</details>
+
+
+  <div id="testContainer">
+    <iframe id="iframe"></iframe>
+  </div>
+
+  <input id="email" type='email'>
+
+  <input id="checkbox" type="checkbox">
+  <input id="radio" type="radio">
+
+  <input id="file" type="file">
+
+  <div id="div"></div>
+
+  <!-- A sentinal guards from events of interest being fired after it emits a state change -->
+  <div id="sentinel"></div>
+
+  <input id="text1">
+
+  <a id="link1" href="#">I am a link link</a>
+  <a id="link2" onclick="console.log('hi')">I am a link-ish link</a>
+  <a id="link3">I am a non-link link</a>
+
+  <div id="textbox" role="textbox" aria-multiline="false">hello</div>
+
+  <form id="form">
+    <button id="default-button">hello</button>
+    <button>world</button>
+    <input id="input">
+    <input id="input-autocomplete-off" autocomplete="off">
+    <input id="input-list" list="browsers">
+    <input id="input-password" type="password">
+    <datalist id="browsers">
+      <option value="Internet Explorer">
+      <option value="Firefox">
+      <option value="Google Chrome">
+      <option value="Opera">
+      <option value="Safari">
+    </datalist>
+  </form>
+
+  <div id="article" role="article">hello</div>
+
+  <img id="animated-image" src="../animated-gif.gif">
+
+  <ul id="listbox" role="listbox">
+    <li role="option">one</li>
+    <li role="option">two</li>
+    <li role="option">three</li>
+    <li role="option">four</li>
+    <li role="option">five</li>
+  </ul>
+
+  <select id="select" size="2">
+    <option>one</option>
+    <option>two</option>
+    <option>three</option>
+    <option>four</option>
+    <option>five</option>
+    <option>size</option>
+  </select>
+
+  <div id="eventdump"></div>
+
+  <div id="eventdump"></div>
+  <button id="popupButton">action</button>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_statechange.xhtml b/accessible/tests/mochitest/events/test_statechange.xhtml
new file mode 100644
index 0000000000..4d63c664f1
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_statechange.xhtml
@@ -0,0 +1,117 @@
+<?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 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        title="XUL state change event tests">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"/>
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../role.js" />
+  <script type="application/javascript"
+          src="../states.js" />
+  <script type="application/javascript"
+          src="../promisified-events.js" />
+
+  <script type="application/javascript">
+  <![CDATA[
+    function offscreenChangeEvent(acc, enabled) {
+      return [
+        EVENT_STATE_CHANGE,
+        event => {
+          const scEvent = event.QueryInterface(nsIAccessibleStateChangeEvent);
+          return event.accessible == acc &&
+            scEvent.state == STATE_OFFSCREEN &&
+            scEvent.isEnabled == enabled;
+        }
+      ];
+    }
+
+    async function testTabpanels() {
+      const tabs = getNode("tabs");
+      is(tabs.selectedIndex, 0, "tab1 initially selected");
+      const panel1 = getAccessible("panel1");
+      testStates(panel1, 0, 0, STATE_OFFSCREEN);
+      const panel2 = getAccessible("panel2");
+      testStates(panel2, STATE_OFFSCREEN);
+      const panel3 = getAccessible("panel3");
+      testStates(panel3, STATE_OFFSCREEN);
+
+      let events = waitForEvents([
+        offscreenChangeEvent(panel1, true),
+        offscreenChangeEvent(panel2, false)
+      ]);
+      info("Selecting tab2");
+      tabs.selectedIndex = 1;
+      await events;
+
+      events = waitForEvents([
+        offscreenChangeEvent(panel2, true),
+        offscreenChangeEvent(panel3, false)
+      ]);
+      info("Selecting tab3");
+      tabs.selectedIndex = 2;
+      await events;
+
+      events = waitForEvents([
+        offscreenChangeEvent(panel3, true),
+        offscreenChangeEvent(panel1, false)
+      ]);
+      info("Selecting tab1");
+      tabs.selectedIndex = 0;
+      await events;
+    }
+
+    async function testPressed() {
+      const toolbarbuttonCheckbox = getNode("toolbarbuttonCheckbox");
+      testStates(toolbarbuttonCheckbox, 0, 0, STATE_PRESSED);
+      info("Checking toolbarbuttonCheckbox");
+      let changed = waitForStateChange(toolbarbuttonCheckbox, STATE_PRESSED, true);
+      toolbarbuttonCheckbox.setAttribute("checked", true);
+      await changed;
+      info("Unchecking toolbarbuttonCheckbox");
+      changed = waitForStateChange(toolbarbuttonCheckbox, STATE_PRESSED, false);
+      toolbarbuttonCheckbox.removeAttribute("checked");
+      await changed;
+    }
+
+    async function doTests() {
+      await testTabpanels();
+      await testPressed();
+      SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  ]]>
+  </script>
+
+  <hbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <p id="display"></p>
+      <div id="content" style="display: none"></div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <tabbox id="tabbox" selectedIndex="0">
+      <tabs id="tabs">
+        <tab id="tab1" label="tab1"/>
+        <tab id="tab2" label="tab2"/>
+        <tab id="tab3" label="tab3"/>
+      </tabs>
+      <tabpanels>
+        <hbox id="panel1"><button label="b1"/></hbox>
+        <hbox id="panel2"><button label="b2"/></hbox>
+        <hbox id="panel3"><button label="b3"/></hbox>
+      </tabpanels>
+    </tabbox>
+
+    <toolbarbutton id="toolbarbuttonCheckbox" type="checkbox">toolbarbuttonCheckbox</toolbarbutton>
+  </hbox>
+</window>
diff --git a/accessible/tests/mochitest/events/test_text.html b/accessible/tests/mochitest/events/test_text.html
new file mode 100644
index 0000000000..8a0bd7f9a4
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_text.html
@@ -0,0 +1,310 @@
+<html>
+
+<head>
+  <title>Accessible mutation events testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    /**
+     * Base text remove invoker and checker.
+     */
+    function textRemoveInvoker(aID, aStart, aEnd, aText) {
+      this.DOMNode = getNode(aID);
+
+      this.eventSeq = [
+        new textChangeChecker(aID, aStart, aEnd, aText, false),
+      ];
+    }
+
+    function textInsertInvoker(aID, aStart, aEnd, aText) {
+      this.DOMNode = getNode(aID);
+
+      this.eventSeq = [
+        new textChangeChecker(aID, aStart, aEnd, aText, true),
+      ];
+    }
+
+    /**
+     * Remove inaccessible child node containing accessibles.
+     */
+    function removeChildSpan(aID) {
+      this.__proto__ = new textRemoveInvoker(aID, 0, 5, "33322");
+
+      this.invoke = function removeChildSpan_invoke() {
+        // remove HTML span, a first child of the node
+        this.DOMNode.firstChild.remove();
+      };
+
+      this.getID = function removeChildSpan_getID() {
+        return "Remove inaccessible span containing accessible nodes" + prettyName(aID);
+      };
+    }
+
+    /**
+     * Insert inaccessible child node containing accessibles.
+     */
+    function insertChildSpan(aID, aInsertAllTogether) {
+      this.__proto__ = new textInsertInvoker(aID, 0, 5, "33322");
+
+      this.invoke = function insertChildSpan_invoke() {
+        // <span><span>333</span><span>22</span></span>
+        if (aInsertAllTogether) {
+          let topSpan = document.createElement("span");
+          let fSpan = document.createElement("span");
+          fSpan.textContent = "333";
+          topSpan.appendChild(fSpan);
+          let sSpan = document.createElement("span");
+          sSpan.textContent = "22";
+          topSpan.appendChild(sSpan);
+
+          this.DOMNode.insertBefore(topSpan, this.DOMNode.childNodes[0]);
+        } else {
+          let topSpan = document.createElement("span");
+          this.DOMNode.insertBefore(topSpan, this.DOMNode.childNodes[0]);
+
+          let fSpan = document.createElement("span");
+          fSpan.textContent = "333";
+          topSpan.appendChild(fSpan);
+
+          let sSpan = document.createElement("span");
+          sSpan.textContent = "22";
+          topSpan.appendChild(sSpan);
+        }
+      };
+
+      this.getID = function insertChildSpan_getID() {
+       return "Insert inaccessible span containing accessibles" +
+          prettyName(aID);
+      };
+    }
+
+    /**
+     * Remove child embedded accessible.
+     */
+    function removeChildDiv(aID) {
+      this.__proto__ = new textRemoveInvoker(aID, 5, 6, kEmbedChar);
+
+      this.invoke = function removeChildDiv_invoke() {
+        var childDiv = this.DOMNode.childNodes[1];
+
+        // Ensure accessible is created to get text remove event when it's
+        // removed.
+        getAccessible(childDiv);
+
+        this.DOMNode.removeChild(childDiv);
+      };
+
+      this.getID = function removeChildDiv_getID() {
+        return "Remove accessible div from the middle of text accessible " +
+          prettyName(aID);
+      };
+    }
+
+    /**
+     * Insert child embedded accessible.
+     */
+    function insertChildDiv(aID) {
+      this.__proto__ = new textInsertInvoker(aID, 5, 6, kEmbedChar);
+
+      this.invoke = function insertChildDiv_invoke() {
+        var childDiv = document.createElement("div");
+        // Note after bug 646216, a sole div without text won't be accessible
+        // and would not result in an embedded character.
+        // Therefore, add some text.
+        childDiv.textContent = "hello";
+        this.DOMNode.insertBefore(childDiv, this.DOMNode.childNodes[1]);
+      };
+
+      this.getID = function insertChildDiv_getID() {
+        return "Insert accessible div into the middle of text accessible " +
+          prettyName(aID);
+      };
+    }
+
+    /**
+     * Remove children from text container from first to last child or vice
+     * versa.
+     */
+    function removeChildren(aID, aLastToFirst, aStart, aEnd, aText) {
+      this.__proto__ = new textRemoveInvoker(aID, aStart, aEnd, aText);
+
+      this.invoke = function removeChildren_invoke() {
+        if (aLastToFirst) {
+          while (this.DOMNode.firstChild)
+            this.DOMNode.removeChild(this.DOMNode.lastChild);
+        } else {
+          while (this.DOMNode.firstChild)
+            this.DOMNode.firstChild.remove();
+        }
+      };
+
+      this.getID = function removeChildren_getID() {
+        return "remove children of " + prettyName(aID) +
+          (aLastToFirst ? " from last to first" : " from first to last");
+      };
+    }
+
+    /**
+     * Remove text from HTML input.
+     */
+    function removeTextFromInput(aID, aStart, aEnd, aText) {
+      this.__proto__ = new textRemoveInvoker(aID, aStart, aEnd, aText);
+
+      this.eventSeq.push(new invokerChecker(EVENT_TEXT_VALUE_CHANGE,
+                                            this.DOMNode));
+
+      this.invoke = function removeTextFromInput_invoke() {
+        this.DOMNode.focus();
+        this.DOMNode.setSelectionRange(aStart, aEnd);
+
+        synthesizeKey("KEY_Delete");
+      };
+
+      this.getID = function removeTextFromInput_getID() {
+        return "Remove text from " + aStart + " to " + aEnd + " for " +
+          prettyName(aID);
+      };
+    }
+
+    /**
+     * Add text into HTML input.
+     */
+    function insertTextIntoInput(aID, aStart, aEnd, aText) {
+      this.__proto__ = new textInsertInvoker(aID, aStart, aEnd, aText);
+
+      this.eventSeq.push(new invokerChecker(EVENT_TEXT_VALUE_CHANGE,
+                                            this.DOMNode));
+
+      this.invoke = function insertTextIntoInput_invoke() {
+        this.DOMNode.focus();
+        sendString("a");
+      };
+
+      this.getID = function insertTextIntoInput_getID() {
+        return "Insert text to " + aStart + " for " + prettyName(aID);
+      };
+    }
+
+    /**
+     * Remove text data from text node of editable area.
+     */
+    function removeTextFromEditable(aID, aStart, aEnd, aText, aTextNode) {
+      this.__proto__ = new textRemoveInvoker(aID, aStart, aEnd, aText);
+
+      this.invoke = function removeTextFromEditable_invoke() {
+        this.DOMNode.focus();
+
+        var selection = window.getSelection();
+        var range = document.createRange();
+        range.setStart(this.textNode, aStart);
+        range.setEnd(this.textNode, aEnd);
+        selection.addRange(range);
+
+        synthesizeKey("KEY_Delete");
+      };
+
+      this.getID = function removeTextFromEditable_getID() {
+        return "Remove text from " + aStart + " to " + aEnd + " for " +
+          prettyName(aID);
+      };
+
+      this.textNode = getNode(aTextNode);
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+    gA11yEventDumpToConsole = true; // debugging
+
+    var gQueue = null;
+    function doTests() {
+      gQueue = new eventQueue();
+
+      // Text remove event on inaccessible child HTML span removal containing
+      // accessible text nodes.
+      gQueue.push(new removeChildSpan("p"));
+      gQueue.push(new insertChildSpan("p"), true);
+      gQueue.push(new insertChildSpan("p"), false);
+
+      // Remove embedded character.
+      gQueue.push(new removeChildDiv("div"));
+      gQueue.push(new insertChildDiv("div"));
+
+      // Remove all children.
+      var text = kEmbedChar + "txt" + kEmbedChar;
+      gQueue.push(new removeChildren("div2", true, 0, 5, text));
+      gQueue.push(new removeChildren("div3", false, 0, 5, text));
+
+      // Text remove from text node within hypertext accessible.
+      gQueue.push(new removeTextFromInput("input", 1, 3, "al"));
+      gQueue.push(new insertTextIntoInput("input", 1, 2, "a"));
+
+      // bug 570691
+      todo(false, "Fix text change events from editable area, see bug 570691");
+      // var textNode = getNode("editable").firstChild;
+      // gQueue.push(new removeTextFromEditable("editable", 1, 3, "al", textNode));
+      // textNode = getNode("editable2").firstChild.firstChild;
+      // gQueue.push(new removeTextFromEditable("editable2", 1, 3, "al", textNode));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=566293"
+     title=" wrong length of text remove event when inaccessible node containing accessible nodes is removed">
+    Mozilla Bug 566293
+  </a><br>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=570710"
+     title="Avoid extra array traversal during text event creation">
+    Mozilla Bug 570710
+  </a><br>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=574003"
+     title="Coalesce text events on nodes removal">
+    Mozilla Bug 574003
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=575052"
+     title="Cache text offsets within hypertext accessible">
+    Mozilla Bug 575052
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=570275"
+     title="Rework accessible tree update code">
+    Mozilla Bug 570275
+  </a>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <p id="p"><span><span>333</span><span>22</span></span>1111</p>
+  <div id="div">hello<div>hello</div>hello</div>
+  <div id="div2"><div>txt</div>txt<div>txt</div></div>
+  <div id="div3"><div>txt</div>txt<div>txt</div></div>
+  <input id="input" value="value">
+  <div contentEditable="true" id="editable">value</div>
+  <div contentEditable="true" id="editable2"><span>value</span></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_text_alg.html b/accessible/tests/mochitest/events/test_text_alg.html
new file mode 100644
index 0000000000..f9b55c8b23
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_text_alg.html
@@ -0,0 +1,249 @@
+<html>
+
+<head>
+  <title>Accessible text update algorithm testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    // //////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    const kRemoval = false;
+    const kInsertion = true;
+    const kUnexpected = true;
+
+    function changeText(aContainerID, aValue, aEventList) {
+      this.containerNode = getNode(aContainerID);
+      this.textNode = this.containerNode.firstChild;
+      this.textData = this.textNode.data;
+
+      this.eventSeq = [ ];
+      this.unexpectedEventSeq = [ ];
+
+      for (var i = 0; i < aEventList.length; i++) {
+        var event = aEventList[i];
+
+        var isInserted = event[0];
+        var str = event[1];
+        var offset = event[2];
+        var checker = new textChangeChecker(this.containerNode, offset,
+                                            offset + str.length, str,
+                                            isInserted);
+
+        if (event[3] == kUnexpected)
+          this.unexpectedEventSeq.push(checker);
+        else
+          this.eventSeq.push(checker);
+      }
+
+      this.invoke = function changeText_invoke() {
+        this.textNode.data = aValue;
+      };
+
+      this.getID = function changeText_getID() {
+        return "change text '" + shortenString(this.textData) + "' -> '" +
+          shortenString(this.textNode.data) + "' for " +
+          prettyName(this.containerNode);
+      };
+    }
+
+    function expStr(x, doublings) {
+      for (var i = 0; i < doublings; ++i)
+        x = x + x;
+      return x;
+    }
+
+    // //////////////////////////////////////////////////////////////////////////
+    // Do tests
+
+    // gA11yEventDumpID = "eventdump"; // debug stuff
+    // gA11yEventDumpToConsole = true;
+
+    var gQueue = null;
+    function doTests() {
+      gQueue = new eventQueue();
+
+      // ////////////////////////////////////////////////////////////////////////
+      // wqrema -> tqb: substitution coalesced with removal
+
+      var events = [
+        [ kRemoval, "w", 0 ], // wqrema -> qrema
+        [ kInsertion, "t", 0], // qrema -> tqrema
+        [ kRemoval, "rema", 2 ], // tqrema -> tq
+        [ kInsertion, "b", 2], // tq -> tqb
+      ];
+      gQueue.push(new changeText("p1", "tqb", events));
+
+      // ////////////////////////////////////////////////////////////////////////
+      // b -> insa: substitution coalesced with insertion (complex substitution)
+
+      events = [
+        [ kRemoval, "b", 0 ], // b ->
+        [ kInsertion, "insa", 0], //  -> insa
+      ];
+      gQueue.push(new changeText("p2", "insa", events));
+
+      // ////////////////////////////////////////////////////////////////////////
+      // abc -> def: coalesced substitutions
+
+      events = [
+        [ kRemoval, "abc", 0 ], // abc ->
+        [ kInsertion, "def", 0], //  -> def
+      ];
+      gQueue.push(new changeText("p3", "def", events));
+
+      // ////////////////////////////////////////////////////////////////////////
+      // abcabc -> abcDEFabc: coalesced insertions
+
+      events = [
+        [ kInsertion, "DEF", 3], // abcabc -> abcDEFabc
+      ];
+      gQueue.push(new changeText("p4", "abcDEFabc", events));
+
+      // ////////////////////////////////////////////////////////////////////////
+      // abc -> defabc: insertion into begin
+
+      events = [
+        [ kInsertion, "def", 0], // abc -> defabc
+      ];
+      gQueue.push(new changeText("p5", "defabc", events));
+
+      // ////////////////////////////////////////////////////////////////////////
+      // abc -> abcdef: insertion into end
+
+      events = [
+        [ kInsertion, "def", 3], // abc -> abcdef
+      ];
+      gQueue.push(new changeText("p6", "abcdef", events));
+
+      // ////////////////////////////////////////////////////////////////////////
+      // defabc -> abc: removal from begin
+
+      events = [
+        [ kRemoval, "def", 0], // defabc -> abc
+      ];
+      gQueue.push(new changeText("p7", "abc", events));
+
+      // ////////////////////////////////////////////////////////////////////////
+      // abcdef -> abc: removal from the end
+
+      events = [
+        [ kRemoval, "def", 3], // abcdef -> abc
+      ];
+      gQueue.push(new changeText("p8", "abc", events));
+
+      // ////////////////////////////////////////////////////////////////////////
+      // abcDEFabc -> abcabc: coalesced removals
+
+      events = [
+        [ kRemoval, "DEF", 3], // abcDEFabc -> abcabc
+      ];
+      gQueue.push(new changeText("p9", "abcabc", events));
+
+      // ////////////////////////////////////////////////////////////////////////
+      // !abcdef@ -> @axbcef!: insertion, deletion and substitutions
+
+      events = [
+        [ kRemoval, "!", 0 ], // !abcdef@ -> abcdef@
+        [ kInsertion, "@", 0], // abcdef@ -> @abcdef@
+        [ kInsertion, "x", 2 ], // @abcdef@ -> @axbcdef@
+        [ kRemoval, "d", 5], // @axbcdef@ -> @axbcef@
+        [ kRemoval, "@", 7 ], // @axbcef@ -> @axbcef
+        [ kInsertion, "!", 7 ], // @axbcef -> @axbcef!
+      ];
+      gQueue.push(new changeText("p10", "@axbcef!", events));
+
+      // ////////////////////////////////////////////////////////////////////////
+      // meilenstein -> levenshtein: insertion, complex and simple substitutions
+
+      events = [
+        [ kRemoval, "m", 0 ], // meilenstein -> eilenstein
+        [ kInsertion, "l", 0], // eilenstein -> leilenstein
+        [ kRemoval, "il", 2 ], // leilenstein -> leenstein
+        [ kInsertion, "v", 2], // leenstein -> levenstein
+        [ kInsertion, "h", 6 ], // levenstein -> levenshtein
+      ];
+      gQueue.push(new changeText("p11", "levenshtein", events));
+
+      // ////////////////////////////////////////////////////////////////////////
+      // long strings, remove/insert pair as the old string was replaced on
+      // new one
+
+      var longStr1 = expStr("x", 16);
+      var longStr2 = expStr("X", 16);
+
+      var newStr = "a" + longStr1 + "b", insStr = longStr1, rmStr = "";
+      events = [
+        [ kRemoval, rmStr, 1, kUnexpected ],
+        [ kInsertion, insStr, 1 ],
+      ];
+      gQueue.push(new changeText("p12", newStr, events));
+
+      newStr = "a" + longStr2 + "b";
+      insStr = longStr2;
+      rmStr = longStr1;
+      events = [
+        [ kRemoval, rmStr, 1 ],
+        [ kInsertion, insStr, 1],
+      ];
+      gQueue.push(new changeText("p12", newStr, events));
+
+      newStr = "ab";
+      insStr = "";
+      rmStr = longStr2;
+      events = [
+        [ kRemoval, rmStr, 1 ],
+        [ kInsertion, insStr, 1, kUnexpected ],
+      ];
+      gQueue.push(new changeText("p12", newStr, events));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=626660"
+     title="Cache rendered text on a11y side">
+    Mozilla Bug 626660
+  </a>
+  <br>
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+  <div id="eventdump"></div>
+
+  <!-- Note: only editable text gets diffed this way. -->
+  <div contenteditable="true">
+    <p id="p1">wqrema</p>
+    <p id="p2">b</p>
+    <p id="p3">abc</p>
+    <p id="p4">abcabc</p>
+    <p id="p5">abc</p>
+    <p id="p6">abc</p>
+    <p id="p7">defabc</p>
+    <p id="p8">abcdef</p>
+    <p id="p9">abcDEFabc</p>
+    <p id="p10">!abcdef@</p>
+    <p id="p11">meilenstein</p>
+    <p id="p12">ab</p>
+  </div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_textattrchange.html b/accessible/tests/mochitest/events/test_textattrchange.html
new file mode 100644
index 0000000000..6282ceb5c2
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_textattrchange.html
@@ -0,0 +1,105 @@
+<html>
+
+<head>
+  <title>Text attribute changed event for misspelled text</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../role.js"></script>
+  <script type="application/javascript"
+          src="../states.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+  <script type="application/javascript"
+          src="../attributes.js"></script>
+
+  <script type="application/javascript">
+
+    const {InlineSpellChecker} = ChromeUtils.import("resource://gre/modules/InlineSpellChecker.jsm");
+
+    function spelledTextInvoker(aID) {
+      this.DOMNode = getNode(aID);
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_TEXT_ATTRIBUTE_CHANGED, this.DOMNode),
+      ];
+
+      this.invoke = function spelledTextInvoker_invoke() {
+        var editor = this.DOMNode.editor;
+        var spellChecker = new InlineSpellChecker(editor);
+        spellChecker.enabled = true;
+
+        // var spellchecker = editor.getInlineSpellChecker(true);
+        // spellchecker.enableRealTimeSpell = true;
+
+        this.DOMNode.value = "valid text inalid tixt";
+      };
+
+      this.finalCheck = function spelledTextInvoker_finalCheck() {
+        var defAttrs = buildDefaultTextAttrs(this.DOMNode, kInputFontSize,
+                                             kNormalFontWeight,
+                                             kInputFontFamily);
+        testDefaultTextAttrs(aID, defAttrs);
+
+        var attrs = { };
+        var misspelledAttrs = {
+          "invalid": "spelling",
+        };
+
+        testTextAttrs(aID, 0, attrs, defAttrs, 0, 11);
+        testTextAttrs(aID, 11, misspelledAttrs, defAttrs, 11, 17);
+        testTextAttrs(aID, 17, attrs, defAttrs, 17, 18);
+        testTextAttrs(aID, 18, misspelledAttrs, defAttrs, 18, 22);
+      };
+
+      this.getID = function spelledTextInvoker_getID() {
+        return "text attribute change for misspelled text";
+      };
+    }
+
+    /**
+     * Do tests.
+     */
+    // gA11yEventDumpID = "eventdump"; // debug stuff
+    // gA11yEventDumpToConsole = true;
+
+    var gQueue = null;
+    function doTests() {
+      // Synth focus before spellchecking turning on to make sure editor
+      // gets a time for initialization.
+
+      gQueue = new eventQueue();
+      gQueue.push(new synthFocus("input"));
+      gQueue.push(new spelledTextInvoker("input"));
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=345759"
+     title="Implement text attributes">
+    Mozilla Bug 345759
+  </a>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <input id="input"/>
+
+  <div id="eventdump"></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_textselchange.html b/accessible/tests/mochitest/events/test_textselchange.html
new file mode 100644
index 0000000000..3dce0760eb
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_textselchange.html
@@ -0,0 +1,82 @@
+<html>
+
+<head>
+  <title>Accessible text selection change events testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../text.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript">
+    var gQueue = null;
+
+    // gA11yEventDumpID = "eventdump"; // debug stuff
+    // gA11yEventDumpToConsole = true;
+
+    function getOnclickSeq(aID) {
+      return [
+        new caretMoveChecker(0, true, aID),
+        new unexpectedInvokerChecker(EVENT_TEXT_SELECTION_CHANGED, aID),
+      ];
+    }
+
+    function doTests() {
+      // test caret move events and caret offsets
+      gQueue = new eventQueue();
+
+      gQueue.push(new synthClick("c1_p1", getOnclickSeq("c1_p1")));
+      gQueue.push(new synthDownKey("c1", new textSelectionChecker("c1", 0, 1, "c1_p1", 0, "c1_p2", 0), { shiftKey: true }));
+      gQueue.push(new synthDownKey("c1", new textSelectionChecker("c1", 0, 2, "c1_p1", 0, "c1_p2", 9), { shiftKey: true }));
+
+      gQueue.push(new synthClick("ta1", getOnclickSeq("ta1")));
+      gQueue.push(new synthRightKey("ta1",
+                                    new textSelectionChecker("ta1", 0, 1, "ta1", 0, "ta1", 1),
+                                    { shiftKey: true }));
+      gQueue.push(new synthLeftKey("ta1",
+                                    [new textSelectionChecker("ta1", 0, 0, "ta1", 0, "ta1", 0),
+                                     new caretMoveChecker(0, true, "ta1")]));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=762934"
+     title="Text selection change event has a wrong target when selection is spanned through several objects">
+    Bug 762934
+  </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=956032"
+     title="Text selection change event missed when selected text becomes unselected">
+    Bug 956032
+  </a>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <div id="c1" contentEditable="true">
+    <p id="c1_p1">paragraph</p>
+    <p id="c1_p2">paragraph</p>
+  </div>
+
+  <textarea id="ta1">Hello world</textarea>
+
+  <div id="eventdump"></div>
+</body>
+</html>
diff --git a/accessible/tests/mochitest/events/test_tree.xhtml b/accessible/tests/mochitest/events/test_tree.xhtml
new file mode 100644
index 0000000000..af7feafde8
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_tree.xhtml
@@ -0,0 +1,358 @@
+<?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 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        title="DOM TreeRowCountChanged and a11y name change events.">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+
+  <script type="application/javascript"
+          src="../treeview.js" />
+
+  <script type="application/javascript"
+          src="../common.js" />
+  <script type="application/javascript"
+          src="../events.js" />
+
+  <script type="application/javascript">
+  <![CDATA[
+    var gView;
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Invoker's checkers
+
+    /**
+     * Check TreeRowCountChanged event.
+     */
+    function rowCountChangedChecker(aMsg, aIdx, aCount)
+    {
+      this.type = "TreeRowCountChanged";
+      this.target = gTree;
+      this.check = function check(aEvent)
+      {
+        var propBag = aEvent.detail.QueryInterface(Ci.nsIPropertyBag2);
+        var index = propBag.getPropertyAsInt32("index");
+        is(index, aIdx, "Wrong 'index' data of 'treeRowCountChanged' event.");
+
+        var count = propBag.getPropertyAsInt32("count");
+        is(count, aCount, "Wrong 'count' data of 'treeRowCountChanged' event.");
+      }
+      this.getID = function getID()
+      {
+        return aMsg + "TreeRowCountChanged";
+      }
+    }
+
+    /**
+     * Check TreeInvalidated event.
+     */
+    function treeInvalidatedChecker(aMsg, aStartRow, aEndRow, aStartCol, aEndCol)
+    {
+      this.type = "TreeInvalidated";
+      this.target = gTree;
+      this.check = function check(aEvent)
+      {
+        var propBag = aEvent.detail.QueryInterface(Ci.nsIPropertyBag2);
+        try {
+          var startRow = propBag.getPropertyAsInt32("startrow");
+        } catch (e) {
+          if (e.name != 'NS_ERROR_NOT_AVAILABLE') {
+            throw e;
+          }
+          startRow = null;
+        }
+        is(startRow, aStartRow,
+           "Wrong 'startrow' of 'treeInvalidated' event on " + aMsg);
+
+        try {
+          var endRow = propBag.getPropertyAsInt32("endrow");
+        } catch (e) {
+          if (e.name != 'NS_ERROR_NOT_AVAILABLE') {
+            throw e;
+          }
+          endRow = null;
+        }
+        is(endRow, aEndRow,
+           "Wrong 'endrow' of 'treeInvalidated' event on " + aMsg);
+
+        try {
+          var startCol = propBag.getPropertyAsInt32("startcolumn");
+        } catch (e) {
+          if (e.name != 'NS_ERROR_NOT_AVAILABLE') {
+            throw e;
+          }
+          startCol = null;
+        }
+        is(startCol, aStartCol,
+           "Wrong 'startcolumn' of 'treeInvalidated' event on " + aMsg);
+
+        try {
+          var endCol = propBag.getPropertyAsInt32("endcolumn");
+        } catch (e) {
+          if (e.name != 'NS_ERROR_NOT_AVAILABLE') {
+            throw e;
+          }
+          endCol = null;
+        }
+        is(endCol, aEndCol,
+           "Wrong 'endcolumn' of 'treeInvalidated' event on " + aMsg);
+      }
+      this.getID = function getID()
+      {
+        return "TreeInvalidated on " + aMsg;
+      }
+    }
+
+    /**
+     * Check name changed a11y event.
+     */
+    function nameChangeChecker(aMsg, aRow, aCol)
+    {
+      this.type = EVENT_NAME_CHANGE;
+
+      function targetGetter()
+      {
+        var acc = getAccessible(gTree);
+
+        var tableAcc = getAccessible(acc, [nsIAccessibleTable]);
+        return tableAcc.getCellAt(aRow, aCol);
+      }
+      Object.defineProperty(this, "target", { get: targetGetter });
+
+      this.getID = function getID()
+      {
+        return aMsg + "name changed";
+      }
+    }
+
+    /**
+     * Check name changed a11y event for a row.
+     */
+    function rowNameChangeChecker(aMsg, aRow)
+    {
+      this.type = EVENT_NAME_CHANGE;
+
+      function targetGetter()
+      {
+        var acc = getAccessible(gTree);
+        return acc.getChildAt(aRow + 1);
+      }
+      Object.defineProperty(this, "target", { get: targetGetter });
+
+      this.getID = function getID()
+      {
+        return aMsg + "name changed";
+      }
+    }
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Invokers
+
+    /**
+     * Set tree view.
+     */
+    function setTreeView()
+    {
+      this.invoke = function setTreeView_invoke()
+      {
+        gTree.view = gView;
+      }
+
+      this.getID = function setTreeView_getID() { return "set tree view"; }
+
+      this.eventSeq = [
+        new invokerChecker(EVENT_REORDER, gTree)
+      ];
+    };
+
+    /**
+     * Insert row at 0 index and checks TreeRowCountChanged and TreeInvalidated
+     * event.
+     */
+    function insertRow()
+    {
+      this.invoke = function insertRow_invoke()
+      {
+        gView.appendItem("last");
+        gTree.rowCountChanged(0, 1);
+      }
+
+      this.eventSeq =
+      [
+        new rowCountChangedChecker("insertRow: ", 0, 1),
+        new treeInvalidatedChecker("insertRow", 0, 5, null, null)
+      ];
+
+      this.getID = function insertRow_getID()
+      {
+        return "insert row";
+      }
+    }
+
+    /**
+     * Invalidates first column and checks six name changed events for each
+     * treeitem plus TreeInvalidated event.
+     */
+    function invalidateColumn()
+    {
+      this.invoke = function invalidateColumn_invoke()
+      {
+        // Make sure accessible subtree of XUL tree is created otherwise no
+        // name change events for cell accessibles are emitted.
+        var tree = getAccessible(gTree);
+        var child = tree.firstChild;
+        var walkDown = true;
+        while (child != tree) {
+          if (walkDown) {
+            var grandChild = child.firstChild;
+            if (grandChild) {
+              child = grandChild;
+              continue;
+            }
+          }
+
+          var sibling = child.nextSibling;
+          if (sibling) {
+            child = sibling;
+            walkDown = true;
+            continue;
+          }
+
+          child = child.parent;
+          walkDown = false;
+        }
+
+        // Fire 'TreeInvalidated' event by InvalidateColumn()
+        var firstCol = gTree.columns.getFirstColumn();
+        for (var i = 0; i < gView.rowCount; i++)
+          gView.setCellText(i, firstCol, "hey " + String(i) + "x0");
+
+        gTree.invalidateColumn(firstCol);
+      }
+
+      this.eventSeq =
+      [
+        new nameChangeChecker("invalidateColumn: ", 0, 0),
+        new nameChangeChecker("invalidateColumn: ", 1, 0),
+        new nameChangeChecker("invalidateColumn: ", 2, 0),
+        new nameChangeChecker("invalidateColumn: ", 3, 0),
+        new nameChangeChecker("invalidateColumn: ", 4, 0),
+        new nameChangeChecker("invalidateColumn: ", 5, 0),
+        new treeInvalidatedChecker("invalidateColumn", null, null, 0, 0)
+      ];
+
+      this.getID = function invalidateColumn_getID()
+      {
+        return "invalidate column";
+      }
+    }
+
+    /**
+     * Invalidates second row and checks name changed event for first treeitem
+     * (note, there are two name changed events on linux due to different
+     * accessible tree for xul:tree element) plus TreeInvalidated event.
+     */
+    function invalidateRow()
+    {
+      this.invoke = function invalidateRow_invoke()
+      {
+        // Fire 'TreeInvalidated' event by InvalidateRow()
+        // eslint-disable-next-line no-unused-vars
+        var colCount = gTree.columns.count;
+        var column = gTree.columns.getFirstColumn();
+        while (column) {
+          gView.setCellText(1, column, "aloha 1x" + String(column.index));
+          column = column.getNext();
+        }
+
+        gTree.invalidateRow(1);
+      }
+
+      this.eventSeq =
+      [
+        new nameChangeChecker("invalidateRow: ", 1, 0),
+        new nameChangeChecker("invalidateRow: ", 1, 1),
+        new rowNameChangeChecker("invalidateRow: ", 1),
+        new treeInvalidatedChecker("invalidateRow", 1, 1, null, null)
+      ];
+
+      this.getID = function invalidateRow_getID()
+      {
+        return "invalidate row";
+      }
+    }
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Test
+
+    var gTree = null;
+    var gTreeView = null;
+    var gQueue = null;
+
+    // gA11yEventDumpID = "debug";
+    gA11yEventDumpToConsole = true; // debuggin
+
+    function doTest()
+    {
+      // Initialize the tree
+      gTree = document.getElementById("tree");
+      gView = new nsTableTreeView(5);
+
+      // Perform actions
+      gQueue = new eventQueue();
+
+      gQueue.push(new setTreeView());
+      gQueue.push(new insertRow());
+      gQueue.push(new invalidateColumn());
+      gQueue.push(new invalidateRow());
+
+      gQueue.invoke();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTest);
+  ]]>
+  </script>
+
+  <hbox flex="1" style="overflow: auto;">
+    <body xmlns="http://www.w3.org/1999/xhtml">
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=368835"
+         title="Fire TreeViewChanged/TreeRowCountChanged events.">
+        Mozilla Bug 368835
+      </a><br/>
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=308564"
+         title="No accessibility events when data in a tree row changes.">
+        Mozilla Bug 308564
+      </a><br/>
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=739524"
+         title="replace TreeViewChanged DOM event on direct call from XUL tree.">
+        Mozilla Bug 739524
+      </a><br/>
+      <a target="_blank"
+         href="https://bugzilla.mozilla.org/show_bug.cgi?id=743568"
+         title="Thunderbird message list tree emitting incorrect focus signals after message deleted.">
+        Mozilla Bug 743568
+      </a>
+      <p id="display"></p>
+      <div id="content" style="display: none">
+      </div>
+      <pre id="test">
+      </pre>
+    </body>
+
+    <vbox id="debug"/>
+    <tree id="tree" flex="1">
+      <treecols>
+        <treecol id="col1" flex="1" primary="true" label="column"/>
+        <treecol id="col2" flex="1" label="column 2"/>
+      </treecols>
+      <treechildren id="treechildren"/>
+    </tree>
+  </hbox>
+
+</window>
diff --git a/accessible/tests/mochitest/events/test_valuechange.html b/accessible/tests/mochitest/events/test_valuechange.html
new file mode 100644
index 0000000000..1ad3c0359d
--- /dev/null
+++ b/accessible/tests/mochitest/events/test_valuechange.html
@@ -0,0 +1,315 @@
+<html>
+
+<head>
+  <title>Accessible value change events testing</title>
+
+  <link rel="stylesheet" type="text/css"
+        href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+
+  <script type="application/javascript"
+          src="../common.js"></script>
+  <script type="application/javascript"
+          src="../events.js"></script>
+
+  <script type="application/javascript"
+          src="../value.js"></script>
+
+  <script type="application/javascript">
+    /**
+     * Do tests.
+     */
+    var gQueue = null;
+
+    // Value change invoker
+    function changeARIAValue(aNodeOrID, aValuenow, aValuetext) {
+      this.DOMNode = getNode(aNodeOrID);
+      this.eventSeq = [ new invokerChecker(aValuetext ?
+                                           EVENT_TEXT_VALUE_CHANGE :
+                                           EVENT_VALUE_CHANGE, this.DOMNode),
+        ];
+
+      this.invoke = function changeARIAValue_invoke() {
+        // Note: this should not fire an EVENT_VALUE_CHANGE when aria-valuetext
+        // is not empty
+        if (aValuenow != undefined)
+          this.DOMNode.setAttribute("aria-valuenow", aValuenow);
+
+        // Note: this should always fire an EVENT_VALUE_CHANGE
+        if (aValuetext != undefined)
+          this.DOMNode.setAttribute("aria-valuetext", aValuetext);
+      };
+
+      this.check = function changeARIAValue_check() {
+        var acc = getAccessible(aNodeOrID, [nsIAccessibleValue]);
+        if (!acc)
+          return;
+
+        // Note: always test against valuetext first because the existence of
+        // aria-valuetext takes precedence over aria-valuenow in gecko.
+        is(acc.value, (aValuetext != undefined) ? aValuetext : aValuenow,
+            "Wrong value of " + prettyName(aNodeOrID));
+      };
+
+      this.getID = function changeARIAValue_getID() {
+        return prettyName(aNodeOrID) + " value changed";
+      };
+    }
+
+    function changeValue(aID, aValue) {
+      this.DOMNode = getNode(aID);
+      this.eventSeq = [new invokerChecker(EVENT_TEXT_VALUE_CHANGE,
+                                          this.DOMNode),
+        ];
+
+      this.invoke = function changeValue_invoke() {
+        this.DOMNode.value = aValue;
+      };
+
+      this.check = function changeValue_check() {
+        var acc = getAccessible(this.DOMNode);
+        is(acc.value, aValue, "Wrong value for " + prettyName(aID));
+      };
+
+      this.getID = function changeValue_getID() {
+        return prettyName(aID) + " value changed";
+      };
+    }
+
+    function changeProgressValue(aID, aValue) {
+      this.DOMNode = getNode(aID);
+      this.eventSeq = [new invokerChecker(EVENT_VALUE_CHANGE, this.DOMNode)];
+
+      this.invoke = function changeProgressValue_invoke() {
+         this.DOMNode.value = aValue;
+      };
+
+      this.check = function changeProgressValue_check() {
+        var acc = getAccessible(this.DOMNode);
+        is(acc.value, aValue + "%", "Wrong value for " + prettyName(aID));
+      };
+
+      this.getID = function changeProgressValue_getID() {
+        return prettyName(aID) + " value changed";
+      };
+    }
+
+    function changeRangeValueWithMouse(aID) {
+      this.DOMNode = getNode(aID);
+      this.eventSeq = [new invokerChecker(EVENT_VALUE_CHANGE, this.DOMNode)];
+
+      this.invoke = function changeRangeValue_invoke() {
+        synthesizeMouse(getNode(aID), 5, 5, { });
+      };
+
+      this.finalCheck = function changeRangeValue_finalCheck() {
+        var acc = getAccessible(this.DOMNode);
+        is(acc.value, "0", "Wrong value for " + prettyName(aID));
+      };
+
+      this.getID = function changeRangeValue_getID() {
+        return prettyName(aID) + " range value changed";
+      };
+    }
+
+    function changeRangeValueWithA11yAPI(aID) {
+      this.DOMNode = getNode(aID);
+      let inputChecker = new invokerChecker("input", this.DOMNode);
+      inputChecker.eventTarget = "element";
+
+      let changeChecker = new invokerChecker("change", this.DOMNode);
+      changeChecker.eventTarget = "element";
+
+      this.eventSeq = [
+        inputChecker,
+        changeChecker,
+        new invokerChecker(EVENT_VALUE_CHANGE, this.DOMNode),
+      ];
+
+      this.invoke = function changeRangeValue_invoke() {
+        this.DOMNode.focus();
+        let acc = getAccessible(this.DOMNode, [nsIAccessibleValue]);
+        acc.currentValue = 0;
+        this.DOMNode.blur();
+      };
+
+      this.finalCheck = function changeRangeValue_finalCheck() {
+        var acc = getAccessible(this.DOMNode);
+        is(acc.value, "0", "Wrong value for " + prettyName(aID));
+      };
+
+      this.getID = function changeRangeValue_getID() {
+        return prettyName(aID) + " range value changed";
+      };
+    }
+
+    function changeSelectValue(aID, aKey, aValue) {
+      this.eventSeq =
+        [ new invokerChecker(EVENT_TEXT_VALUE_CHANGE, getAccessible(aID)) ];
+
+      this.invoke = function changeSelectValue_invoke() {
+        getAccessible(aID).takeFocus();
+        synthesizeKey(aKey, {}, window);
+      };
+
+      this.finalCheck = function changeSelectValue_finalCheck() {
+        is(getAccessible(aID).value, aValue, "Wrong value for " + prettyName(aID));
+      };
+
+      this.getID = function changeSelectValue_getID() {
+        return `${prettyName(aID)} closed select value change on '${aKey}'' key press`;
+      };
+    }
+
+    // enableLogging("DOMEvents");
+    // gA11yEventDumpToConsole = true;
+    function doTests() {
+
+      // Test initial values
+      testValue("slider_vn", "5", 5, 0, 1000, 0);
+      testValue("slider_vnvt", "plain", 0, 0, 5, 0);
+      testValue("slider_vt", "hi", 1.5, 0, 3, 0);
+      testValue("scrollbar", "5", 5, 0, 1000, 0);
+      testValue("splitter", "5", 5, 0, 1000, 0);
+      testValue("progress", "22%", 22, 0, 100, 0);
+      testValue("range", "6", 6, 0, 10, 1);
+      testValue("range2", "6", 6, 0, 10, 1);
+
+      // Test that elements which should not expose values do not
+      let separatorVal = getAccessible("separator", [nsIAccessibleValue], null, DONOTFAIL_IF_NO_INTERFACE);
+      ok(!separatorVal, "value interface is not exposed for separator");
+      let separatorAcc = getAccessible("separator");
+      ok(!separatorAcc.value, "Value text is not exposed for separator");
+
+      // Test value change events
+      gQueue = new eventQueue();
+
+      gQueue.push(new changeARIAValue("slider_vn", "6", undefined));
+      gQueue.push(new changeARIAValue("slider_vt", undefined, "hey!"));
+      gQueue.push(new changeARIAValue("slider_vnvt", "3", "sweet"));
+      gQueue.push(new changeARIAValue("scrollbar", "6", undefined));
+      gQueue.push(new changeARIAValue("splitter", "6", undefined));
+
+      gQueue.push(new changeValue("combobox", "hello"));
+
+      gQueue.push(new changeProgressValue("progress", "50"));
+      gQueue.push(new changeRangeValueWithMouse("range"));
+      gQueue.push(new changeRangeValueWithA11yAPI("range2"));
+
+      gQueue.push(new changeSelectValue("select", "VK_DOWN", "2nd"));
+      gQueue.push(new changeSelectValue("select", "3", "3rd"));
+
+      let iframeSelect = getAccessible("selectIframe").firstChild.firstChild;
+      gQueue.push(new changeSelectValue(iframeSelect, "VK_DOWN", "2"));
+
+      let shadowSelect = getAccessible("selectShadow").firstChild;
+      gQueue.push(new changeSelectValue(shadowSelect, "VK_DOWN", "2"));
+      gQueue.push(new changeValue("number", "2"));
+
+      gQueue.invoke(); // Will call SimpleTest.finish();
+    }
+
+    SimpleTest.waitForExplicitFinish();
+    addA11yLoadEvent(doTests);
+  </script>
+</head>
+
+<body>
+
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=478032"
+     title=" Fire delayed value changed event for aria-valuetext changes">
+    Mozilla Bug 478032
+  </a>
+  <a target="_blank"
+    href="https://bugzilla.mozilla.org/show_bug.cgi?id=529289"
+    title="We dont expose new aria role 'scrollbar' and property aria-orientation">
+   Mozilla Bug 529289
+  </a>
+  <a target="_blank"
+    href="https://bugzilla.mozilla.org/show_bug.cgi?id=559764"
+    title="Make HTML5 input@type=range element accessible">
+   Mozilla Bug 559764
+  </a>
+  <a target="_blank"
+    href="https://bugzilla.mozilla.org/show_bug.cgi?id=703202"
+    title="ARIA comboboxes don't fire value change events">
+   Mozilla Bug 703202
+  </a>
+  <a target="_blank"
+    href="https://bugzilla.mozilla.org/show_bug.cgi?id=761901"
+    title=" HTML5 progress accessible should fire value change event">
+   Mozilla Bug 761901
+  </a>
+
+
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+  <div id="eventdump"></div>
+
+  <!-- ARIA sliders -->
+  <div id="slider_vn" role="slider" aria-valuenow="5"
+       aria-valuemin="0" aria-valuemax="1000">slider</div>
+
+  <div id="slider_vt" role="slider" aria-valuetext="hi"
+       aria-valuemin="0" aria-valuemax="3">greeting slider</div>
+
+  <div id="slider_vnvt" role="slider" aria-valuenow="0" aria-valuetext="plain"
+       aria-valuemin="0" aria-valuemax="5">sweetness slider</div>
+
+  <!-- ARIA scrollbar -->
+  <div id="scrollbar" role="scrollbar" aria-valuenow="5"
+       aria-valuemin="0" aria-valuemax="1000">slider</div>
+
+  <!-- ARIA separator which is focusable (i.e. a splitter) -->
+  <div id="splitter" role="separator" tabindex="0" aria-valuenow="5"
+       aria-valuemin="0" aria-valuemax="1000">splitter</div>
+
+  <!-- ARIA separator which is not focusable and should not expose values -->
+  <div id="separator" role="separator" aria-valuenow="5"
+       aria-valuemin="0" aria-valuemax="1000">splitter</div>
+
+  <!-- ARIA combobox -->
+  <input id="combobox" role="combobox" aria-autocomplete="inline">
+
+  <!-- progress bar -->
+  <progress id="progress" value="22" max="100"></progress>
+
+  <!-- input@type="range" -->
+  <input type="range" id="range" min="0" max="10" value="6">
+
+  <!-- input@type="range" -->
+  <input type="range" id="range2" min="0" max="10" value="6">
+
+  <select id="select">
+    <option>1st</option>
+    <option>2nd</option>
+    <option>3rd</option>
+  </select>
+
+  <iframe id="selectIframe"
+    src="data:text/html,<select id='iframeSelect'><option>1</option><option>2</option></select>">
+  </iframe>
+
+  <div id="selectShadow"></div>
+  <script>
+    let host = document.getElementById("selectShadow");
+    let shadow = host.attachShadow({mode: "open"});
+    let select = document.createElement("select");
+    select.id = "shadowSelect";
+    let option = document.createElement("option");
+    option.textContent = "1";
+    select.appendChild(option);
+    option = document.createElement("option");
+    option.textContent = "2";
+    select.appendChild(option);
+    shadow.appendChild(select);
+  </script>
+
+  <input type="number" id="number" value="1">
+</body>
+</html>