1 files changed, 23 insertions, 0 deletions
diff --git a/testing/web-platform/tests/navigation-api/navigate-event/navigation-traverseTo-same-document-preventDefault-multiple-windows.html b/testing/web-platform/tests/navigation-api/navigate-event/navigation-traverseTo-same-document-preventDefault-multiple-windows.html
new file mode 100644
index 0000000000..9bb64fb7cc
--- /dev/null
+++ b/testing/web-platform/tests/navigation-api/navigate-event/navigation-traverseTo-same-document-preventDefault-multiple-windows.html
@@ -0,0 +1,23 @@
+<!doctype html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<iframe id="i" src="/common/blank.html"></iframe>
+<script>
+promise_test(async t => {
+  // Wait for after the load event so that the navigation doesn't get converted
+  // into a replace navigation.
+  await new Promise(resolve => window.onload = () => t.step_timeout(resolve, 0));
+  await navigation.navigate("#").finished;
+  await i.contentWindow.navigation.navigate("#").finished;
+  assert_equals(navigation.entries().length, 2);
+  assert_equals(i.contentWindow.navigation.entries().length, 2);
+  assert_equals(navigation.currentEntry.index, 1);
+  assert_equals(i.contentWindow.navigation.currentEntry.index, 1);
+
+  navigation.onnavigate = e => e.preventDefault();
+  i.contentWindow.navigation.onnavigate = t.unreached_func("navigate event should not fire in the iframe, because the traversal was cancelled in the top window");
+  await promise_rejects_dom(t, "AbortError", navigation.traverseTo(navigation.entries()[0].key).finished);
+  assert_equals(navigation.currentEntry.index, 1);
+  assert_equals(i.contentWindow.navigation.currentEntry.index, 1);
+}, "navigation.traverseTo() - if a top window cancels the traversal, any iframes should not fire navigate");
+</script>