1 files changed, 41 insertions, 0 deletions
diff --git a/testing/web-platform/tests/custom-elements/v0/instantiating/non-configurable-constructor-property.html b/testing/web-platform/tests/custom-elements/v0/instantiating/non-configurable-constructor-property.html
new file mode 100644
index 000000000..ddb1ff9de
--- /dev/null
+++ b/testing/web-platform/tests/custom-elements/v0/instantiating/non-configurable-constructor-property.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>If prototype has a non-configurable property named constructor, Document.registerElement() throws NotSupportedError</title>
+<meta name="author" title="Sergey G. Grekhov" href="mailto:sgrekhov@unipro.ru">
+<meta name="assert" content="If  PROTOTYPE has a non-configurable property named constructor, throw a NotSupportedError and stop">
+<link rel="help" href="http://www.w3.org/TR/custom-elements/#instantiating-custom-elements">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../testcommon.js"></script>
+</head>
+<body>
+<div id="log"></div>
+<script>
+test(function() {
+    var doc = newHTMLDocument();
+    var proto = Object.create(HTMLElement.prototype);
+    Object.defineProperty(proto, 'constructor', {configurable: false});
+    assert_throws('NotSupportedError', function() {
+        doc.registerElement('x-a', {prototype: proto});
+    }, 'Exception should be thrown in case of attempt to register element ' +
+        'with a non-configurable property named constructor');
+}, 'Test Document.registerElement() throws NotSupportedError ' +
+    'if prototype has a non-configurable property named constructor');
+
+
+test(function() {
+    var doc = newHTMLDocument();
+    var proto = Object.create(HTMLElement.prototype);
+    Object.defineProperty(proto, 'constructor', {configurable: true});
+    try {
+        doc.registerElement('x-b', {prototype: proto});
+    } catch (e) {
+        assert_unreached('Exception should not be thrown in case of attempt to register ' +
+            'element with a configurable property named constructor');
+    }
+}, 'Test Document.registerElement() accepts prototype with a configurable ' +
+    'property named constructor without throwing errors');
+</script>
+</body>
+</html>