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Bug 1698726 [wpt PR 28031] - WebKit export of https://bugs.webkit.org/show_bug.cgi?id=221872, a=testonly

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Automatic update from web-platform-tests
WebKit export of https://bugs.webkit.org/show_bug.cgi?id=221872 (#28031)

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wpt-commits: f0ef0c1fb0c668f44488d9a4376c6d0d3b305cff
wpt-pr: 28031
This commit is contained in:
Alexey Shvayka 2021-03-17 13:28:11 +00:00 committed by moz-wptsync-bot
parent f3c60fb94f
commit f291dfd716
1 changed files with 35 additions and 0 deletions
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35
testing/web-platform/tests/WebIDL/ecmascript-binding/attributes-accessors-unique-function-objects.html Normal file
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<!DOCTYPE html>
<meta charset="utf-8">
<title>All attributes accessors are unique function objects</title>
<link rel="help" href="https://heycam.github.io/webidl/#idl-interface-mixins">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
"use strict";
test(() => {
const seenPrototypes = new WeakSet([Function.prototype]);
const seenFunctions = new WeakMap();
for (const windowKey of Object.getOwnPropertyNames(window)) {
const windowValue = window[windowKey];
if (typeof windowValue !== "function") continue;
const {prototype} = windowValue;
if (!prototype || seenPrototypes.has(prototype)) continue;
seenPrototypes.add(prototype);
for (const key of Object.getOwnPropertyNames(prototype)) {
const assert_not_seen = (fn, field) => {
const fnInfo = `${windowKey}.${key}.${field}`;
assert_equals(seenFunctions.get(fn), undefined, fnInfo);
seenFunctions.set(fn, fnInfo);
};
const desc = Object.getOwnPropertyDescriptor(prototype, key);
if (desc.get) assert_not_seen(desc.get, "[[Get]]");
if (desc.set) assert_not_seen(desc.set, "[[Set]]");
}
}
}, "For attributes, each copy of the accessor property has distinct built-in function objects for its getters and setters.");
</script>