1 files changed, 32 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_bug749738.js b/browser/base/content/test/general/browser_bug749738.js
new file mode 100644
index 0000000000..4430e5d8a7
--- /dev/null
+++ b/browser/base/content/test/general/browser_bug749738.js
@@ -0,0 +1,32 @@
+/* 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/. */
+
+"use strict";
+
+const DUMMY_PAGE =
+  // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+  "http://example.org/browser/browser/base/content/test/general/dummy_page.html";
+
+/**
+ * This test checks that if you search for something on one tab, then close
+ * that tab and have the find bar open on the next tab you get switched to,
+ * closing the find bar in that tab works without exceptions.
+ */
+add_task(async function test_bug749738() {
+  // Open find bar on initial tab.
+  await gFindBarPromise;
+
+  await BrowserTestUtils.withNewTab(DUMMY_PAGE, async function () {
+    await gFindBarPromise;
+    gFindBar.onFindCommand();
+    EventUtils.sendString("Dummy");
+  });
+
+  try {
+    gFindBar.close();
+    ok(true, "findbar.close should not throw an exception");
+  } catch (e) {
+    ok(false, "findbar.close threw exception: " + e);
+  }
+});