1 files changed, 45 insertions, 0 deletions
diff --git a/browser/base/content/test/zoom/browser_background_link_zoom_reset.js b/browser/base/content/test/zoom/browser_background_link_zoom_reset.js
new file mode 100644
index 0000000000..ac224cc4a5
--- /dev/null
+++ b/browser/base/content/test/zoom/browser_background_link_zoom_reset.js
@@ -0,0 +1,45 @@
+/* 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/. */
+const TEST_PAGE = "/browser/browser/base/content/test/zoom/zoom_test.html";
+var gTestTab, gBgTab, gTestZoom;
+
+function testBackgroundLoad() {
+  (async function () {
+    is(
+      ZoomManager.zoom,
+      gTestZoom,
+      "opening a background tab should not change foreground zoom"
+    );
+
+    await FullZoomHelper.removeTabAndWaitForLocationChange(gBgTab);
+
+    await FullZoom.reset();
+    await FullZoomHelper.removeTabAndWaitForLocationChange(gTestTab);
+    finish();
+  })();
+}
+
+function testInitialZoom() {
+  (async function () {
+    is(ZoomManager.zoom, 1, "initial zoom level should be 1");
+    FullZoom.enlarge();
+
+    gTestZoom = ZoomManager.zoom;
+    isnot(gTestZoom, 1, "zoom level should have changed");
+
+    gBgTab = BrowserTestUtils.addTab(gBrowser);
+    await FullZoomHelper.load(gBgTab, "http://mochi.test:8888" + TEST_PAGE);
+  })().then(testBackgroundLoad, FullZoomHelper.failAndContinue(finish));
+}
+
+function test() {
+  waitForExplicitFinish();
+
+  (async function () {
+    gTestTab = BrowserTestUtils.addTab(gBrowser);
+    await FullZoomHelper.selectTabAndWaitForLocationChange(gTestTab);
+    // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+    await FullZoomHelper.load(gTestTab, "http://example.org" + TEST_PAGE);
+  })().then(testInitialZoom, FullZoomHelper.failAndContinue(finish));
+}