forked from mirrors/gecko-dev
794413cfe5
Automatic update from web-platform-tests Fix typo in customized built-in elements test name (#46305) -- wpt-commits: 7b9e821996f56fe9fc2d2891147af0c0acf74487 wpt-pr: 46305
62 lines
2.4 KiB
HTML
62 lines
2.4 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>Custom Elements: HTMLElement must allow subclassing</title>
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<meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">
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<meta name="assert" content="HTMLElement must allow subclassing">
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<link rel="help" href="https://html.spec.whatwg.org/#html-element-constructors">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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</head>
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<body>
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<div id="log"></div>
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<script>
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test(function() {
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class SomeCustomElement extends HTMLElement {};
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var getCount = 0;
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var countingProxy = new Proxy(SomeCustomElement, {
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get: function(target, prop, receiver) {
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if (prop == "prototype") {
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++getCount;
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}
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return Reflect.get(target, prop, receiver);
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}
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});
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customElements.define("failure-counting-element-1", countingProxy,
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{ extends: "button" });
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// define() gets the prototype of the constructor it's passed, so
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// reset the counter.
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getCount = 0;
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assert_throws_js(TypeError,
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function () { new countingProxy() },
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"Should not be able to construct an HTMLElement named 'button'");
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assert_equals(getCount, 0, "Should never have gotten .prototype");
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}, 'HTMLElement constructor must not get .prototype until it finishes its extends sanity checks, calling proxy constructor directly');
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test(function() {
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class SomeCustomElement extends HTMLElement {};
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var getCount = 0;
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var countingProxy = new Proxy(SomeCustomElement, {
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get: function(target, prop, receiver) {
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if (prop == "prototype") {
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++getCount;
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}
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return Reflect.get(target, prop, receiver);
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}
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});
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customElements.define("failure-counting-element-2", countingProxy,
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{ extends: "button" });
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// define() gets the prototype of the constructor it's passed, so
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// reset the counter.
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getCount = 0;
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assert_throws_js(TypeError,
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function () { Reflect.construct(HTMLElement, [], countingProxy) },
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"Should not be able to construct an HTMLElement named 'button'");
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assert_equals(getCount, 0, "Should never have gotten .prototype");
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}, 'HTMLElement constructor must not get .prototype until it finishes its extends sanity checks, calling via Reflect');
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</script>
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</body>
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</html>
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