1 files changed, 69 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_tabs_close_beforeunload.js b/browser/base/content/test/general/browser_tabs_close_beforeunload.js
new file mode 100644
index 0000000000..0534250970
--- /dev/null
+++ b/browser/base/content/test/general/browser_tabs_close_beforeunload.js
@@ -0,0 +1,69 @@
+"use strict";
+
+SimpleTest.requestCompleteLog();
+
+SpecialPowers.pushPrefEnv({
+  set: [["dom.require_user_interaction_for_beforeunload", false]],
+});
+
+const FIRST_TAB =
+  getRootDirectory(gTestPath) + "close_beforeunload_opens_second_tab.html";
+const SECOND_TAB = getRootDirectory(gTestPath) + "close_beforeunload.html";
+
+add_task(async function () {
+  info("Opening first tab");
+  let firstTab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    FIRST_TAB
+  );
+  let secondTabLoadedPromise;
+  let secondTab;
+  let tabOpened = new Promise(resolve => {
+    info("Adding tabopen listener");
+    gBrowser.tabContainer.addEventListener(
+      "TabOpen",
+      function tabOpenListener(e) {
+        info("Got tabopen, removing listener and waiting for load");
+        gBrowser.tabContainer.removeEventListener(
+          "TabOpen",
+          tabOpenListener,
+          false,
+          false
+        );
+        secondTab = e.target;
+        secondTabLoadedPromise = BrowserTestUtils.browserLoaded(
+          secondTab.linkedBrowser,
+          false,
+          SECOND_TAB
+        );
+        resolve();
+      },
+      false,
+      false
+    );
+  });
+  info("Opening second tab using a click");
+  await SpecialPowers.spawn(firstTab.linkedBrowser, [""], async function () {
+    content.document.getElementsByTagName("a")[0].click();
+  });
+  info("Waiting for the second tab to be opened");
+  await tabOpened;
+  info("Waiting for the load in that tab to finish");
+  await secondTabLoadedPromise;
+
+  let closeBtn = secondTab.closeButton;
+  info("closing second tab (which will self-close in beforeunload)");
+  closeBtn.click();
+  ok(
+    secondTab.closing,
+    "Second tab should be marked as closing synchronously."
+  );
+  ok(!secondTab.linkedBrowser, "Second tab's browser should be dead");
+  ok(!firstTab.closing, "First tab should not be closing");
+  ok(firstTab.linkedBrowser, "First tab's browser should be alive");
+  info("closing first tab");
+  BrowserTestUtils.removeTab(firstTab);
+
+  ok(firstTab.closing, "First tab should be marked as closing");
+  ok(!firstTab.linkedBrowser, "First tab's browser should be dead");
+});