22 lines
769 B
JavaScript
22 lines
769 B
JavaScript
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// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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"use strict";
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function getTypeName(receiver) {
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Error.prepareStackTrace = function(e, stack) { return stack; }
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var stack = (function() { return new Error().stack; }).call(receiver);
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Error.prepareStackTrace = undefined;
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return stack[0].getTypeName();
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}
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assertNull(getTypeName(undefined));
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assertNull(getTypeName(null));
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assertEquals("Number", getTypeName(1));
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assertEquals("String", getTypeName(""));
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assertEquals("Boolean", getTypeName(false));
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assertEquals("Object", getTypeName({}));
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assertEquals("Array", getTypeName([]));
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assertEquals("Custom", getTypeName(new (function Custom(){})()));
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