1 files changed, 72 insertions, 0 deletions
diff --git a/browser/base/content/test/zoom/browser_mousewheel_zoom.js b/browser/base/content/test/zoom/browser_mousewheel_zoom.js
new file mode 100644
index 0000000000..a814f1dba6
--- /dev/null
+++ b/browser/base/content/test/zoom/browser_mousewheel_zoom.js
@@ -0,0 +1,72 @@
+/* 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 =
+  // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+  "http://example.org/browser/browser/base/content/test/zoom/zoom_test.html";
+
+var gTab1, gTab2, gLevel1;
+
+function test() {
+  waitForExplicitFinish();
+
+  // Scroll on Ctrl + mousewheel
+  SpecialPowers.pushPrefEnv({ set: [["mousewheel.with_control.action", 3]] });
+
+  (async function () {
+    gTab1 = BrowserTestUtils.addTab(gBrowser);
+    gTab2 = BrowserTestUtils.addTab(gBrowser);
+
+    await FullZoomHelper.selectTabAndWaitForLocationChange(gTab1);
+    await FullZoomHelper.load(gTab1, TEST_PAGE);
+    await FullZoomHelper.load(gTab2, TEST_PAGE);
+  })().then(zoomTab1, FullZoomHelper.failAndContinue(finish));
+}
+
+function zoomTab1() {
+  (async 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);
+    await BrowserTestUtils.synthesizeMouse(
+      null,
+      10,
+      10,
+      {
+        wheel: true,
+        ctrlKey: true,
+        deltaY: -1,
+        deltaMode: WheelEvent.DOM_DELTA_LINE,
+      },
+      browser1
+    );
+
+    info("Waiting for tab 1 to be zoomed");
+    await TestUtils.waitForCondition(() => {
+      gLevel1 = ZoomManager.getZoomForBrowser(browser1);
+      return gLevel1 > 1;
+    });
+
+    await FullZoomHelper.selectTabAndWaitForLocationChange(gTab2);
+    FullZoomHelper.zoomTest(
+      gTab2,
+      gLevel1,
+      "Tab 2 should have zoomed along with tab 1"
+    );
+  })().then(finishTest, FullZoomHelper.failAndContinue(finish));
+}
+
+function finishTest() {
+  (async function () {
+    await FullZoomHelper.selectTabAndWaitForLocationChange(gTab1);
+    await FullZoom.reset();
+    await FullZoomHelper.removeTabAndWaitForLocationChange(gTab1);
+    await FullZoomHelper.selectTabAndWaitForLocationChange(gTab2);
+    await FullZoom.reset();
+    await FullZoomHelper.removeTabAndWaitForLocationChange(gTab2);
+  })().then(finish, FullZoomHelper.failAndContinue(finish));
+}