mirror of https://github.com/tc39/test262.git
31 lines
1.1 KiB
JavaScript
31 lines
1.1 KiB
JavaScript
// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-equality-operators-runtime-semantics-evaluation
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description: >
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Abstract Equality special-cases [[IsHTMLDDA]] objects with `undefined` and `null`.
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info: |
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EqualityExpression : EqualityExpression == RelationalExpression
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[...]
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5. Return the result of performing Abstract Equality Comparison rval == lval.
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The [[IsHTMLDDA]] Internal Slot / Changes to Abstract Equality Comparison
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The following steps are inserted after step 3 of the Abstract Equality Comparison algorithm:
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1. If Type(x) is Object and x has an [[IsHTMLDDA]] internal slot and y is either null or undefined, return true.
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2. If x is either null or undefined and Type(y) is Object and y has an [[IsHTMLDDA]] internal slot, return true.
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features: [IsHTMLDDA]
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---*/
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var IsHTMLDDA = $262.IsHTMLDDA;
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assert(IsHTMLDDA == undefined, "== with `undefined`");
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assert(undefined == IsHTMLDDA, "== with `undefined`");
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assert(IsHTMLDDA == null, "== with `null`");
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assert(null == IsHTMLDDA, "== with `null`");
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assert(IsHTMLDDA == IsHTMLDDA);
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