1 files changed, 20 insertions, 0 deletions
diff --git a/testing/web-platform/tests/js/builtins/Promise-incumbent-global.sub.html b/testing/web-platform/tests/js/builtins/Promise-incumbent-global.sub.html
new file mode 100644
index 000000000..6ae0a9fe5
--- /dev/null
+++ b/testing/web-platform/tests/js/builtins/Promise-incumbent-global.sub.html
@@ -0,0 +1,20 @@
+<!doctype html>
+<meta charset=utf-8>
+<title></title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<iframe src="{{location[scheme]}}://{{domains[www1]}}:{{ports[http][0]}}{{location[path]}}/../Promise-incumbent-global-subframe.sub.html"></iframe>
+<script>
+
+var t = async_test("Check the incumbent global Promise callbacks are called with");
+
+onload = t.step_func(function() {
+  onmessage = t.step_func_done(function(e) {
+    var d = e.data;
+    assert_equals(d.actual, d.expected, d.reason);
+  });
+
+  frames[0].postMessage("start", "*");
+});
+
+</script>