summaryrefslogtreecommitdiffstats
path: root/dom/bindings/test/test_InstanceOf.html
diff options
context:
space:
mode:
Diffstat (limited to 'dom/bindings/test/test_InstanceOf.html')
-rw-r--r--dom/bindings/test/test_InstanceOf.html54
1 files changed, 54 insertions, 0 deletions
diff --git a/dom/bindings/test/test_InstanceOf.html b/dom/bindings/test/test_InstanceOf.html
new file mode 100644
index 000000000..514ec1b2a
--- /dev/null
+++ b/dom/bindings/test/test_InstanceOf.html
@@ -0,0 +1,54 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=748983
+-->
+<head>
+ <meta charset="utf-8">
+ <title>Test for Bug 748983</title>
+ <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=748983">Mozilla Bug 748983</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 748983 **/
+
+SimpleTest.waitForExplicitFinish();
+
+function runTest()
+{
+ ok(document instanceof EventTarget, "document is an event target")
+ ok(new XMLHttpRequest() instanceof XMLHttpRequest, "instanceof should work on XHR");
+ ok(HTMLElement.prototype instanceof Node, "instanceof needs to walk the prototype chain")
+
+ var otherWin = document.getElementById("testFrame").contentWindow;
+
+ ok(otherWin.HTMLElement.prototype instanceof otherWin.Node, "Same-origin instanceof of a interface prototype object should work, even if called cross-origin");
+ ok(!(otherWin.HTMLElement.prototype instanceof Node), "Cross-origin instanceof of a interface prototype object shouldn't work");
+
+ // We need to reset HTMLElement.prototype.__proto__ to the original value
+ // before using anything from the harness, otherwise the harness code breaks
+ // in weird ways.
+ HTMLElement.prototype.__proto__ = otherWin.Element.prototype;
+ var [ shouldSucceed, shouldFail ] = otherWin.runTest();
+ shouldSucceed = shouldSucceed && HTMLElement.prototype instanceof otherWin.Element;
+ shouldFail = shouldFail && HTMLElement.prototype instanceof Element;
+ HTMLElement.prototype.__proto__ = Element.prototype;
+
+ ok(shouldSucceed, "If an interface prototype object is on the protochain then instanceof with the interface object should succeed");
+ ok(!shouldFail, "If an interface prototype object is not on the protochain then instanceof with the interface object should succeed");
+
+ SimpleTest.finish();
+}
+
+</script>
+</pre>
+<iframe id="testFrame" src="file_InstanceOf.html" onload="runTest()"></iframe>
+</body>
+</html>