1 files changed, 29 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/004.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/004.html
new file mode 100644
index 0000000000..7076a4dd18
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/004.html
@@ -0,0 +1,29 @@
+<!doctype html>
+<title>salvagable state of document after setting beforeunload listener</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+var t = async_test();
+
+var loaded = false;
+var beforeunload_fired = false;
+var timeout_fired = false;
+
+function start_test() {
+  step_timeout(
+    t.step_func(function() {
+      assert_true(beforeunload_fired);
+      assert_false(timeout_fired);
+      t.done()
+    }), 1000);
+}
+
+onload = function() {
+  var iframe = document.getElementsByTagName("iframe")[0]
+  onload = null;
+  iframe.src="004-1.html?" + Math.random();
+};
+
+</script>
+<iframe></iframe>