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+<!doctype html>
+<title>WebSockets: setting event handlers to undefined</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=../../../constants.sub.js></script>
+<meta name="variant" content="?default">
+<meta name="variant" content="?wss">
+<div id=log></div>
+<script>
+var events = ['onclose', 'onopen', 'onerror', 'onmessage'];
+for (var i = 0; i < events.length; ++i) {
+ test(function(){
+ var ws = new WebSocket(SCHEME_DOMAIN_PORT+'/empty-message');
+ var foo = function() {}
+ ws[events[i]] = foo;
+ assert_equals(ws[events[i]], foo, events[i]);
+ ws[events[i]] = undefined;
+ assert_equals(ws[events[i]], null, events[i]);
+ });
+}
+</script>