Bug 1015721 - Add test. r=jimm

browser/base/content/test/general/browser.ini

@@ -276,6 +276,8 @@ skip-if = e10s # Bug 921959 - reload with LOAD_FLAGS_ALLOW_MIXED_CONTENT fails i
 skip-if = buildapp == "mulet" || e10s # Bug ?????? - test directly manipulates content (strange - gets an element from a child which it tries to treat as a string, but that fails)
 [browser_bug970746.js]
 skip-if = e10s # Bug ?????? - test directly manipulates content (directly gets elements from the content)
+[browser_bug1015721.js]
+skip-if = e10s # Bug 1056146 - FullZoomHelper uses promiseTabLoadEvent() which isn't e10s friendly
 [browser_canonizeURL.js]
 skip-if = e10s # Bug ?????? - [JavaScript Error: "Error in AboutHome.sendAboutHomeData TypeError: target.messageManager is undefined" {file: "resource:///modules/AboutHome.jsm" line: 208}]
 [browser_contentAreaClick.js]

browser/base/content/test/general/browser_bug1015721.js

@@ -0,0 +1,55 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const TEST_PAGE = "http://example.org/browser/browser/base/content/test/general/zoom_test.html";
+
+var gTab1, gTab2, gLevel1;
+
+function test() {
+  waitForExplicitFinish();
+
+  Task.spawn(function () {
+    gTab1 = gBrowser.addTab();
+    gTab2 = gBrowser.addTab();
+
+    yield FullZoomHelper.selectTabAndWaitForLocationChange(gTab1);
+    yield FullZoomHelper.load(gTab1, TEST_PAGE);
+    yield FullZoomHelper.load(gTab2, TEST_PAGE);
+  }).then(zoomTab1, FullZoomHelper.failAndContinue(finish));
+}
+
+function dispatchZoomEventToBrowser(browser) {
+  EventUtils.synthesizeWheel(browser.contentDocument.documentElement, 10, 10, {
+    ctrlKey: true, deltaY: -1, deltaMode: WheelEvent.DOM_DELTA_LINE
+  }, browser.contentWindow);
+}
+
+function zoomTab1() {
+  Task.spawn(function () {
+    is(gBrowser.selectedTab, gTab1, "Tab 1 is selected");
+    FullZoomHelper.zoomTest(gTab1, 1, "Initial zoom of tab 1 should be 1");
+    FullZoomHelper.zoomTest(gTab2, 1, "Initial zoom of tab 2 should be 1");
+
+    let browser1 = gBrowser.getBrowserForTab(gTab1);
+    dispatchZoomEventToBrowser(browser1);
+
+    gLevel1 = ZoomManager.getZoomForBrowser(browser1);
+    ok(gLevel1 > 1, "New zoom for tab 1 should be greater than 1");
+
+    yield FullZoomHelper.selectTabAndWaitForLocationChange(gTab2);
+    FullZoomHelper.zoomTest(gTab2, gLevel1, "Tab 2 should have zoomed along with tab 1");
+  }).then(finishTest, FullZoomHelper.failAndContinue(finish));
+}
+
+function finishTest() {
+  Task.spawn(function () {
+    yield FullZoomHelper.selectTabAndWaitForLocationChange(gTab1);
+    FullZoom.reset();
+    yield FullZoomHelper.removeTabAndWaitForLocationChange(gTab1);
+    yield FullZoomHelper.selectTabAndWaitForLocationChange(gTab2);
+    FullZoom.reset();
+    yield FullZoomHelper.removeTabAndWaitForLocationChange(gTab2);
+  }).then(finish, FullZoomHelper.failAndContinue(finish));
+}