1 files changed, 41 insertions, 0 deletions
diff --git a/testing/web-platform/tests/navigation-api/per-entry-events/dispose-for-navigation-in-child.html b/testing/web-platform/tests/navigation-api/per-entry-events/dispose-for-navigation-in-child.html
new file mode 100644
index 0000000000..2482877085
--- /dev/null
+++ b/testing/web-platform/tests/navigation-api/per-entry-events/dispose-for-navigation-in-child.html
@@ -0,0 +1,41 @@
+<!doctype html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<iframe id="iframe" 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(r => window.onload = () => t.step_timeout(r, 0));
+
+  await iframe.contentWindow.navigation.navigate("#a");
+  await navigation.navigate("#1").finished;
+  await navigation.navigate("#2").finished;
+  await navigation.navigate("#3").finished;
+  await iframe.contentWindow.navigation.back().finished;
+  assert_equals(navigation.entries().length, 4);
+  assert_equals(iframe.contentWindow.navigation.entries().length, 2);
+  assert_equals(navigation.currentEntry.index, 0);
+  assert_equals(iframe.contentWindow.navigation.currentEntry.index, 0);
+
+  let top_entry_0_before = navigation.entries()[0];
+  let dispose_promises = [];
+  for (let i = 1; i < navigation.entries().length; i++) {
+    dispose_promises.push(new Promise(r => navigation.entries()[i].ondispose = r))
+  }
+
+  // This push navigation should truncate in the top window.
+  await iframe.contentWindow.navigation.navigate("#b").finished;
+
+  // entries() should be updated in both frames, and all forward entries in the
+  // top window should have dispose events, even though that wasn't the window
+  // that navigated.
+  await Promise.all(dispose_promises);
+  assert_equals(navigation.entries().length, 1);
+  assert_equals(iframe.contentWindow.navigation.entries().length, 2);
+  assert_equals(navigation.currentEntry.index, 0);
+  assert_equals(iframe.contentWindow.navigation.currentEntry.index, 1);
+  assert_equals(navigation.entries()[0], top_entry_0_before);
+
+}, "Dispose events should fire when entries are removed by a navigation in a different frame");
+</script>