Add m-esr52 at 52.6.0

1 files changed, 25 insertions, 0 deletions

diff --git a/browser/base/content/test/general/browser_bug585830.js b/browser/base/content/test/general/browser_bug585830.js
new file mode 100644
index 000000000..6d3adf198
--- /dev/null
+++ b/browser/base/content/test/general/browser_bug585830.js
@@ -0,0 +1,25 @@
+/* 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() {
+  let tab1 = gBrowser.selectedTab;
+  let tab2 = gBrowser.addTab("about:blank", {skipAnimation: true});
+  gBrowser.addTab();
+  gBrowser.selectedTab = tab2;
+
+  gBrowser.removeCurrentTab({animate: true});
+  gBrowser.tabContainer.advanceSelectedTab(-1, true);
+  is(gBrowser.selectedTab, tab1, "First tab should be selected");
+  gBrowser.removeTab(tab2);
+
+  // test for "null has no properties" fix. See Bug 585830 Comment 13
+  gBrowser.removeCurrentTab({animate: true});
+  try {
+    gBrowser.tabContainer.advanceSelectedTab(-1, false);
+  } catch (err) {
+    ok(false, "Shouldn't throw");
+  }
+
+  gBrowser.removeTab(tab1);
+}