1 files changed, 33 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/unload-main-frame-same-origin.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/unload-main-frame-same-origin.window.js
new file mode 100644
index 0000000000..5a95455c4c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/unload-main-frame-same-origin.window.js
@@ -0,0 +1,33 @@
+// META: title=Unload runs in main frame when navigating same-origin.
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  const rc1 = await rcHelper.addWindow();
+
+  t.add_cleanup(() => localStorage.removeItem('unload'));
+
+  // Initialize storage and add "unload" event handler.
+  await rc1.executeScript(() => {
+    localStorage.setItem('unload', 'not yet');
+    addEventListener('unload', () => {
+      localStorage.setItem('unload', 'ran');
+    });
+  });
+
+  // Navigate away.
+  const rc2 = await rc1.navigateToNew();
+
+  // Navigate back.
+  await rc2.historyBack();
+
+  // Test that the unload handler wrote to storage.
+  // Running it in the remote context after going back should ensure that the
+  // navigation (and therefore the unload handler) has completed.
+  assert_equals(
+      await rc1.executeScript(() => localStorage.getItem('unload')), 'ran');
+});