1 files changed, 27 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_bug577121.js b/browser/base/content/test/general/browser_bug577121.js
new file mode 100644
index 0000000000..cbaa379e85
--- /dev/null
+++ b/browser/base/content/test/general/browser_bug577121.js
@@ -0,0 +1,27 @@
+/* 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/. */
+
+function test() {
+  // Disable tab animations
+  gReduceMotionOverride = true;
+
+  // Open 2 other tabs, and pin the second one. Like that, the initial tab
+  // should get closed.
+  let testTab1 = BrowserTestUtils.addTab(gBrowser);
+  let testTab2 = BrowserTestUtils.addTab(gBrowser);
+  gBrowser.pinTab(testTab2);
+
+  // Now execute "Close other Tabs" on the first manually opened tab (tab1).
+  // -> tab2 ist pinned, tab1 should remain open and the initial tab should
+  // get closed.
+  gBrowser.removeAllTabsBut(testTab1);
+
+  is(gBrowser.tabs.length, 2, "there are two remaining tabs open");
+  is(gBrowser.tabs[0], testTab2, "pinned tab2 stayed open");
+  is(gBrowser.tabs[1], testTab1, "tab1 stayed open");
+
+  // Cleanup. Close only one tab because we need an opened tab at the end of
+  // the test.
+  gBrowser.removeTab(testTab2);
+}