1 files changed, 78 insertions, 0 deletions
diff --git a/browser/base/content/test/tabs/browser_tabswitch_window_focus.js b/browser/base/content/test/tabs/browser_tabswitch_window_focus.js
new file mode 100644
index 0000000000..a808ab4f09
--- /dev/null
+++ b/browser/base/content/test/tabs/browser_tabswitch_window_focus.js
@@ -0,0 +1,78 @@
+"use strict";
+
+// Allow to open popups without any kind of interaction.
+SpecialPowers.pushPrefEnv({ set: [["dom.disable_window_flip", false]] });
+
+const FILE = getRootDirectory(gTestPath) + "open_window_in_new_tab.html";
+
+add_task(async function () {
+  info("Opening first tab: " + FILE);
+  let firstTab = await BrowserTestUtils.openNewForegroundTab(gBrowser, FILE);
+
+  let promiseTabOpened = BrowserTestUtils.waitForNewTab(
+    gBrowser,
+    FILE + "?open-click",
+    true
+  );
+  info("Opening second tab using a click");
+  await BrowserTestUtils.synthesizeMouseAtCenter(
+    "#open-click",
+    {},
+    firstTab.linkedBrowser
+  );
+
+  info("Waiting for the second tab to be opened");
+  let secondTab = await promiseTabOpened;
+
+  info("Going back to the first tab");
+  await BrowserTestUtils.switchTab(gBrowser, firstTab);
+
+  info("Focusing second tab by clicking on the first tab");
+  await BrowserTestUtils.switchTab(gBrowser, async function () {
+    await SpecialPowers.spawn(firstTab.linkedBrowser, [""], async function () {
+      content.document.querySelector("#focus").click();
+    });
+  });
+
+  is(gBrowser.selectedTab, secondTab, "Should've switched tabs");
+
+  await BrowserTestUtils.removeTab(firstTab);
+  await BrowserTestUtils.removeTab(secondTab);
+});
+
+add_task(async function () {
+  info("Opening first tab: " + FILE);
+  let firstTab = await BrowserTestUtils.openNewForegroundTab(gBrowser, FILE);
+
+  let promiseTabOpened = BrowserTestUtils.waitForNewTab(
+    gBrowser,
+    FILE + "?open-mousedown",
+    true
+  );
+  info("Opening second tab using a click");
+  await BrowserTestUtils.synthesizeMouseAtCenter(
+    "#open-mousedown",
+    { type: "mousedown" },
+    firstTab.linkedBrowser
+  );
+
+  info("Waiting for the second tab to be opened");
+  let secondTab = await promiseTabOpened;
+
+  is(gBrowser.selectedTab, secondTab, "Should've switched tabs");
+
+  info("Ensuring we don't switch back");
+  await new Promise(resolve => {
+    // We need to wait for something _not_ happening, so we need to use an arbitrary setTimeout.
+    //
+    // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+    setTimeout(function () {
+      is(gBrowser.selectedTab, secondTab, "Should've remained in original tab");
+      resolve();
+    }, 500);
+  });
+
+  info("cleanup");
+  await BrowserTestUtils.removeTab(firstTab);
+  await BrowserTestUtils.removeTab(secondTab);
+});