mirror of https://github.com/tc39/test262.git
28 lines
989 B
JavaScript
28 lines
989 B
JavaScript
// Copyright (C) 2016 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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esid: sec-isnan-number
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description: >
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number argument is converted by ToNumber
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info: |
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isNaN (number)
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1. Let num be ? ToNumber(number).
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2. If num is NaN, return true.
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3. Otherwise, return false.
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---*/
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assert.sameValue(isNaN("0"), false, "'0'");
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assert.sameValue(isNaN(""), false, "the empty string");
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assert.sameValue(isNaN("Infinity"), false, "'Infinity'");
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assert.sameValue(isNaN("this is not a number"), true, "string");
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assert.sameValue(isNaN(true), false, "true");
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assert.sameValue(isNaN(false), false, "false");
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assert.sameValue(isNaN([1]), false, "Object [1]");
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assert.sameValue(isNaN([Infinity]), false, "Object [Infinity]");
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assert.sameValue(isNaN([NaN]), true, "Object [NaN]");
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assert.sameValue(isNaN(null), false, "null");
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assert.sameValue(isNaN(undefined), true, "undefined");
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assert.sameValue(isNaN(), true, "no arg");
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