1 files changed, 42 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_bug491431.js b/browser/base/content/test/general/browser_bug491431.js
new file mode 100644
index 0000000000..d8eaa15f45
--- /dev/null
+++ b/browser/base/content/test/general/browser_bug491431.js
@@ -0,0 +1,42 @@
+/* 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/. */
+
+var testPage = "data:text/plain,test bug 491431 Page";
+
+function test() {
+  waitForExplicitFinish();
+
+  let newWin, tabA, tabB;
+
+  // test normal close
+  tabA = BrowserTestUtils.addTab(gBrowser, testPage);
+  gBrowser.tabContainer.addEventListener(
+    "TabClose",
+    function (firstTabCloseEvent) {
+      ok(!firstTabCloseEvent.detail.adoptedBy, "This was a normal tab close");
+
+      // test tab close by moving
+      tabB = BrowserTestUtils.addTab(gBrowser, testPage);
+      gBrowser.tabContainer.addEventListener(
+        "TabClose",
+        function (secondTabCloseEvent) {
+          executeSoon(function () {
+            ok(
+              secondTabCloseEvent.detail.adoptedBy,
+              "This was a tab closed by moving"
+            );
+
+            // cleanup
+            newWin.close();
+            executeSoon(finish);
+          });
+        },
+        { capture: true, once: true }
+      );
+      newWin = gBrowser.replaceTabWithWindow(tabB);
+    },
+    { capture: true, once: true }
+  );
+  gBrowser.removeTab(tabA);
+}