1 files changed, 65 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_tab_dragdrop2.js b/browser/base/content/test/general/browser_tab_dragdrop2.js
new file mode 100644
index 0000000000..9c589922f5
--- /dev/null
+++ b/browser/base/content/test/general/browser_tab_dragdrop2.js
@@ -0,0 +1,65 @@
+"use strict";
+
+const ROOT = getRootDirectory(gTestPath);
+const URI = ROOT + "browser_tab_dragdrop2_frame1.xhtml";
+
+// Load the test page (which runs some child popup tests) in a new window.
+// After the tests were run, tear off the tab into a new window and run popup
+// tests a second time. We don't care about tests results, exceptions and
+// crashes will be caught.
+add_task(async function () {
+  // Open a new window.
+  let args = "chrome,all,dialog=no";
+  let win = window.openDialog(
+    AppConstants.BROWSER_CHROME_URL,
+    "_blank",
+    args,
+    URI
+  );
+
+  // Wait until the tests were run.
+  await promiseTestsDone(win);
+  ok(true, "tests succeeded");
+
+  // Create a second tab so that we can move the original one out.
+  BrowserTestUtils.addTab(win.gBrowser, "about:blank", { skipAnimation: true });
+
+  // Tear off the original tab.
+  let browser = win.gBrowser.selectedBrowser;
+  let tabClosed = BrowserTestUtils.waitForEvent(browser, "pagehide", true);
+  let win2 = win.gBrowser.replaceTabWithWindow(win.gBrowser.tabs[0]);
+
+  // Add a 'TestsDone' event listener to ensure that the docShells is properly
+  // swapped to the new window instead of the page being loaded again. If this
+  // works fine we should *NOT* see a TestsDone event.
+  let onTestsDone = () => ok(false, "shouldn't run tests when tearing off");
+  win2.addEventListener("TestsDone", onTestsDone);
+
+  // Wait until the original tab is gone and the new window is ready.
+  await Promise.all([tabClosed, promiseDelayedStartupFinished(win2)]);
+
+  // Remove the 'TestsDone' event listener as now
+  // we're kicking off a new test run manually.
+  win2.removeEventListener("TestsDone", onTestsDone);
+
+  // Run tests once again.
+  let promise = promiseTestsDone(win2);
+  let browser2 = win2.gBrowser.selectedBrowser;
+  await SpecialPowers.spawn(browser2, [], async () => {
+    content.test_panels();
+  });
+  await promise;
+  ok(true, "tests succeeded a second time");
+
+  // Cleanup.
+  await promiseWindowClosed(win2);
+  await promiseWindowClosed(win);
+});
+
+function promiseTestsDone(win) {
+  return BrowserTestUtils.waitForEvent(win, "TestsDone");
+}
+
+function promiseDelayedStartupFinished(win) {
+  return new Promise(resolve => whenDelayedStartupFinished(win, resolve));
+}