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Add tests for the messageerror IDL and content attributes
Follows whatwg/html#2530. As explained there, the circumstances in which this would actually be fired by the UA are not tested in this PR, waiting instead for #5003. As a side effect this syncs various IDL snippets with the HTML Standard.
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<!DOCTYPE html> | ||
<title>onmessageerror content attribute</title> | ||
<link rel="author" title="Domenic Denicola" href="mailto:d@domenic.me"> | ||
<link rel="help" href="https://html.spec.whatwg.org/multipage/#handler-onmessageerror"> | ||
<script src="/resources/testharness.js"></script> | ||
<script src="/resources/testharnessreport.js"></script> | ||
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<body> | ||
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<script> | ||
"use strict"; | ||
window.messageErrorHappened = false; | ||
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function cleanup() { | ||
window.messageErrorHappened = false; | ||
document.body.removeAttribute("onmessageerror"); | ||
} | ||
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test(() => { | ||
assert_equals(document.body.onmessageerror, null, "body"); | ||
assert_equals(window.onmessageerror, null, "window"); | ||
}, "The default value of onmessageerror is null"); | ||
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test(t => { | ||
t.add_cleanup(cleanup); | ||
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document.body.setAttribute("onmessageerror", "window.messageErrorHappened = true;") | ||
const compiledHandler = document.body.onmessageerror; | ||
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assert_equals(typeof compiledHandler, "function", "The onmessageerror property must be a function"); | ||
compiledHandler(); | ||
assert_true(window.messageErrorHappened, "Calling the handler must run the code"); | ||
}, "The onmessageerror content attribute must be compiled into the onmessageerror property"); | ||
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test(t => { | ||
t.add_cleanup(cleanup); | ||
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document.body.setAttribute("onmessageerror", "window.messageErrorHappened = true;") | ||
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document.body.dispatchEvent(new Event("messageerror")); | ||
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assert_true(window.messageErrorHappened, "Dispatching the event must run the code"); | ||
}, "The onmessageerror content attribute must execute when an event is dispatched on the body"); | ||
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test(t => { | ||
t.add_cleanup(cleanup); | ||
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document.body.setAttribute("onmessageerror", "window.messageErrorHappened = true;") | ||
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window.dispatchEvent(new Event("messageerror")); | ||
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assert_true(window.messageErrorHappened, "Dispatching the event must run the code"); | ||
}, "The onmessageerror content attribute must execute when an event is dispatched on the window"); | ||
</script> |