1 files changed, 40 insertions, 0 deletions
diff --git a/testing/web-platform/tests/navigation-api/navigate-event/intercept-same-document-history-back.html b/testing/web-platform/tests/navigation-api/navigate-event/intercept-same-document-history-back.html
new file mode 100644
index 0000000000..6faabe1964
--- /dev/null
+++ b/testing/web-platform/tests/navigation-api/navigate-event/intercept-same-document-history-back.html
@@ -0,0 +1,40 @@
+<!doctype html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+async_test(t => {
+  // Wait for after the load event so that the navigation doesn't get converted
+  // into a replace navigation.
+  window.onload = () => t.step_timeout(() => {
+    let onnavigate_calls = 0;
+    let onnavigatesuccess_calls = 0;
+    navigation.onnavigate = e => {
+      onnavigate_calls++;
+      e.intercept();
+    }
+    navigation.onnavigatesuccess = t.step_func(e => {
+      onnavigatesuccess_calls++;
+      if (onnavigatesuccess_calls == 3) {
+        assert_equals(navigation.entries().length, 3);
+        assert_equals(navigation.currentEntry.index, 1);
+        assert_equals(onnavigate_calls, 3);
+        history.back();
+      } else if (onnavigatesuccess_calls == 4) {
+        assert_equals(navigation.entries().length, 3);
+        assert_equals(navigation.currentEntry.index, 0);
+        assert_equals(onnavigate_calls, 4);
+        t.done();
+      }
+    });
+
+    navigation.navigate("?foo").finished
+      .then(t.step_func(() => navigation.navigate("?bar").finished))
+      .then(t.step_func(() => {
+        assert_equals(navigation.entries().length, 3);
+        assert_equals(navigation.currentEntry.index, 2);
+        assert_equals(onnavigate_calls, 2);
+        history.back();
+      }));
+  }, 0);
+}, "event.intercept() can intercept same-document history.back()");
+</script>