1 files changed, 21 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webmessaging/MessageEvent.html b/testing/web-platform/tests/webmessaging/MessageEvent.html
new file mode 100644
index 000000000..e95b3efc2
--- /dev/null
+++ b/testing/web-platform/tests/webmessaging/MessageEvent.html
@@ -0,0 +1,21 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>MessageEvent</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<div id=log></div>
+<script>
+var prefixes = ['moz', 'ms', 'o', 'webkit'];
+prefixes.forEach(function(prefix) {
+  var name = prefix + "InitMessageEvent";
+
+  test(function() {
+    assert_false(name in MessageEvent.prototype);
+  }, name + " on the prototype");
+
+  test(function() {
+    var event = new MessageEvent("message");
+    assert_false(name in event);
+  }, name + " on the instance");
+});
+</script>