1 files changed, 22 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webmessaging/MessageEvent.any.js b/testing/web-platform/tests/webmessaging/MessageEvent.any.js
new file mode 100644
index 0000000000..0fb2636911
--- /dev/null
+++ b/testing/web-platform/tests/webmessaging/MessageEvent.any.js
@@ -0,0 +1,22 @@
+// META: title=MessageEvent
+
+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");
+});
+
+test(function() {
+  var event = new MessageEvent("message");
+  assert_throws_js(TypeError, function() {
+    event.initMessageEvent();
+  }, "Not enough arguments to initMessageEvent");
+}, "initMessageEvent with no arguments");