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<!DOCTYPE html>
<link rel="help" href="https://dom.spec.whatwg.org/#concept-create-element">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/custom-elements-helpers.js"></script>
<body>
<script>
// Returns a promise which will resolve with the next error event fired at any
// of `windows`, after the invocation of this function. Once one does, this
// function removes its listeners and produces that error event so that it can
// be examined (most notably for which global proxy it was targeted at).
async function nextErrorEvent(windows) {
let listener;
let p = new Promise((resolve, reject) => {
listener = (event) => { resolve(event); event.preventDefault(); };
});
for (let w of windows) {
w.addEventListener('error', listener);
}
try {
return await p;
} finally {
for (let w of windows) {
w.removeEventListener('error', listener);
}
}
}
const supportsCustomizedBuiltinElements = (function() {
let supported = false;
customElements.define('feature-detect', class extends HTMLDivElement {}, { get extends() { supported = true; return "div"; } });
return supported;
})();
promise_test(async t => {
let w = await create_window_in_test(t, `<script>self.MyElement = class extends HTMLElement { constructor() { throw new Error(); } };</`+`script>`);
let w2 = await create_window_in_test(t);
w2.customElements.define('my-element', w.MyElement);
let nextErrorPromise = nextErrorEvent([self, w, w2]);
let elem = w2.document.createElement('my-element');
let errorEvent = await nextErrorPromise;
assert_true(elem instanceof w2.HTMLUnknownElement, 'element should be an HTMLUnknownElement');
if (errorEvent.error) {
assert_true(errorEvent.error instanceof w.Error, 'error should be an instance created inside the MyElement constructor (if it was not muted)');
}
assert_equals(errorEvent.target, w, `error event should target definition's global but instead targets ${event.target === w2 ? 'document\'s global' : 'test harness global'}`);
}, 'autonomous: exception thrown in constructor is reported to definition\'s global');
promise_test(async t => {
let w = await create_window_in_test(t, `<script>self.MyElement = class extends HTMLElement { constructor() { this.textContent = 'hello!'; } };</`+`script>`);
let w2 = await create_window_in_test(t);
w2.customElements.define('my-element', w.MyElement);
let nextErrorPromise = nextErrorEvent([self, w, w2]);
let elem = w2.document.createElement('my-element');
let errorEvent = await nextErrorPromise;
assert_true(elem instanceof w2.HTMLUnknownElement, 'element should be an HTMLUnknownElement');
assert_equals(errorEvent.target, w, `error event should target definition's global but instead targets ${event.currentTarget === w2 ? 'document\'s global' : 'test harness global'}`);
}, 'autonomous: exception thrown by spec due to invalid element state is reported to definition\'s global');
promise_test(async t => {
assert_implements(supportsCustomizedBuiltinElements, 'customized built-in elements not supported');
let w = await create_window_in_test(t, `<script>self.MyDivElement = class extends HTMLDivElement { constructor() { throw new Error(); } };</`+`script>`);
let w2 = await create_window_in_test(t);
w2.customElements.define('my-div', w.MyDivElement, {extends: 'div'});
let nextErrorPromise = nextErrorEvent([self, w, w2]);
let elem = w2.document.createElement('div', {is: 'my-div'});
let errorEvent = await nextErrorPromise;
assert_equals(Object.getPrototypeOf(elem), w2.HTMLDivElement.prototype, 'element should be an HTMLDivElement (and not inherited from it)');
assert_true(errorEvent.error instanceof w.Error, 'error should be an instance created inside the MyElement constructor');
assert_equals(errorEvent.target, w, `error event should target definition's global but instead targets ${event.target === w2 ? 'document\'s global' : 'test harness global'}`);
}, 'customized built-in: exception thrown in constructor is reported to definition\'s global');
promise_test(async t => {
assert_implements(supportsCustomizedBuiltinElements, 'customized built-in elements not supported');
let w = await create_window_in_test(t, `<script>self.MyDivElement = class extends HTMLDivElement { constructor() { return document.createElement('div'); } };</`+`script>`);
let w2 = await create_window_in_test(t);
w2.customElements.define('my-div', w.MyDivElement, {extends: 'div'});
let nextErrorPromise = nextErrorEvent([self, w, w2]);
let elem = w2.document.createElement('div', {is: 'my-div'});
let errorEvent = await nextErrorPromise;
assert_equals(Object.getPrototypeOf(elem), w2.HTMLDivElement.prototype, 'element should be an HTMLDivElement (and not inherited from it)');
assert_equals(errorEvent.target, w, `error event should target definition's global but instead targets ${event.currentTarget === w2 ? 'document\'s global' : 'test harness global'}`);
}, 'customized built-in: exception thrown by spec due to not returning the same value is reported to definition\'s global');
</script>
</body>
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