mirror of https://github.com/tc39/test262.git
45 lines
1.4 KiB
JavaScript
45 lines
1.4 KiB
JavaScript
// Copyright (C) Copyright 2015 the V8 project authors. 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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es6id: 12.9.4
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description: >
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Type coercion of value returned by constructor's @@hasInstance property
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info: >
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1. If Type(C) is not Object, throw a TypeError exception.
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2. Let instOfHandler be GetMethod(C,@@hasInstance).
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3. ReturnIfAbrupt(instOfHandler).
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4. If instOfHandler is not undefined, then
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a. Return ToBoolean(Call(instOfHandler, C, «O»)).
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features: [Symbol, Symbol.hasInstance]
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---*/
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var F = {};
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F[Symbol.hasInstance] = function() { return undefined; };
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assert.sameValue(0 instanceof F, false);
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F[Symbol.hasInstance] = function() { return null; };
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assert.sameValue(0 instanceof F, false);
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F[Symbol.hasInstance] = function() { return true; };
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assert.sameValue(0 instanceof F, true);
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F[Symbol.hasInstance] = function() { return NaN; };
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assert.sameValue(0 instanceof F, false);
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F[Symbol.hasInstance] = function() { return 1; };
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assert.sameValue(0 instanceof F, true);
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F[Symbol.hasInstance] = function() { return ''; };
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assert.sameValue(0 instanceof F, false);
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F[Symbol.hasInstance] = function() { return 'string'; };
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assert.sameValue(0 instanceof F, true);
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F[Symbol.hasInstance] = function() { return Symbol(); };
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assert.sameValue(0 instanceof F, true);
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F[Symbol.hasInstance] = function() { return {}; };
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assert.sameValue(0 instanceof F, true);
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