1 files changed, 34 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 000000000..d270e912e
--- /dev/null
+++ b/browser/base/content/test/general/browser_bug491431.js
@@ -0,0 +1,34 @@
+/* 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 = gBrowser.addTab(testPage);
+  gBrowser.tabContainer.addEventListener("TabClose", function(firstTabCloseEvent) {
+    gBrowser.tabContainer.removeEventListener("TabClose", arguments.callee, true);
+    ok(!firstTabCloseEvent.detail.adoptedBy, "This was a normal tab close");
+
+    // test tab close by moving
+    tabB = gBrowser.addTab(testPage);
+    gBrowser.tabContainer.addEventListener("TabClose", function(secondTabCloseEvent) {
+      gBrowser.tabContainer.removeEventListener("TabClose", arguments.callee, true);
+      executeSoon(function() {
+        ok(secondTabCloseEvent.detail.adoptedBy, "This was a tab closed by moving");
+
+        // cleanup
+        newWin.close();
+        executeSoon(finish);
+      });
+    }, true);
+    newWin = gBrowser.replaceTabWithWindow(tabB);
+  }, true);
+  gBrowser.removeTab(tabA);
+}
+