Bug 984843 - Try to fix intermittent timeouts and leaks r=ehsan

From 55be314a97a4934167ad466dc884fb5c933dea1e Mon Sep 17 00:00:00 2001

browser/components/tabview/test/browser_tabview_bug637840.js

@@ -7,10 +7,6 @@ function test() {
   waitForExplicitFinish();
 
   newWindowWithTabView(function(win) {
-    registerCleanupFunction(function() {
-      win.close();
-    });
-
     cw = win.TabView.getContentWindow();
 
     let groupItemOne = cw.GroupItems.groupItems[0];
@@ -22,11 +18,13 @@ function test() {
     let groupItemThree = createGroupItemWithBlankTabs(win, 300, 300, 40, 2);
     is(groupItemThree.getChildren().length, 2, "Group three has 2 tab items");
 
+    waitForFocus(() => {
       testMoreRecentlyUsedGroup(groupItemOne, groupItemTwo, function() {
         testMoreRecentlyUsedGroup(groupItemOne, groupItemThree, function() {
           testRemoveGroupAndCheckMoreRecentlyUsedGroup(groupItemOne, groupItemTwo);
         });
       });
+    }, cw);
   });
 }
 
@@ -81,12 +79,14 @@ function testRemoveGroupAndCheckMoreRecentlyUsedGroup(groupItemOne, groupItemTwo
     is(groupItemTwo.getActiveTab(), tabItem, "The first item in the group two is still active after group one is closed");
     is(cw.GroupItems.getActiveGroupItem(), groupItemTwo, "The group two is still active after group one is closed");
 
+    promiseWindowClosed(cw.top).then(() => {
+      cw = null;
       finish();
     });
+  });
   // close the tab item and the group item
   let closeButton = tabItemInGroupItemOne.container.getElementsByClassName("close");
   ok(closeButton[0], "Tab item close button exists");
   EventUtils.sendMouseEvent({ type: "mousedown" }, closeButton[0], cw);
   EventUtils.sendMouseEvent({ type: "mouseup" }, closeButton[0], cw);
 }
-

browser/components/tabview/test/head.js

@@ -400,3 +400,21 @@ function whenAppTabIconAdded(groupItem, callback) {
     executeSoon(callback);
   });
 }
+
+/**
+ * Chrome windows aren't closed synchronously. Provide a helper method to close
+ * a window and wait until we received the "domwindowclosed" notification for it.
+ */
+function promiseWindowClosed(win) {
+  let deferred = Promise.defer();
+
+  Services.obs.addObserver(function obs(subject, topic) {
+    if (subject == win) {
+      Services.obs.removeObserver(obs, topic);
+      deferred.resolve();
+    }
+  }, "domwindowclosed", false);
+
+  win.close();
+  return deferred.promise;
+}