b314b46b09
real JavaScript object before looking for it in the prototype chain during instanceof checks. Review URL: http://codereview.chromium.org/6579 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@471 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
94 lines
3.0 KiB
JavaScript
94 lines
3.0 KiB
JavaScript
// Copyright 2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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assertTrue({} instanceof Object);
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assertTrue([] instanceof Object);
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assertFalse({} instanceof Array);
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assertTrue([] instanceof Array);
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function TestChains() {
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var A = {};
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var B = {};
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var C = {};
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B.__proto__ = A;
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C.__proto__ = B;
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function F() { }
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F.prototype = A;
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assertTrue(C instanceof F);
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assertTrue(B instanceof F);
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assertFalse(A instanceof F);
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F.prototype = B;
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assertTrue(C instanceof F);
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assertFalse(B instanceof F);
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assertFalse(A instanceof F);
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F.prototype = C;
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assertFalse(C instanceof F);
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assertFalse(B instanceof F);
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assertFalse(A instanceof F);
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}
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TestChains();
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function TestExceptions() {
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function F() { }
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var items = [ 1, new Number(42),
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true,
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'string', new String('hest'),
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{}, [],
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F, new F(),
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Object, String ];
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var exceptions = 0;
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var instanceofs = 0;
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for (var i = 0; i < items.length; i++) {
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for (var j = 0; j < items.length; j++) {
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try {
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if (items[i] instanceof items[j]) instanceofs++;
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} catch (e) {
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assertTrue(e instanceof TypeError);
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exceptions++;
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}
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}
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}
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assertEquals(10, instanceofs);
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assertEquals(88, exceptions);
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// Make sure to throw an exception if the function prototype
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// isn't a proper JavaScript object.
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function G() { }
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G.prototype = undefined;
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assertThrows("({} instanceof G)");
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}
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TestExceptions();
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