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159 lines
5.9 KiB
159 lines
5.9 KiB
// 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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// This file contains a number of tests of array functions and their
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// interaction with properties in the prototype chain.
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//
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// The behavior of SpiderMonkey is slightly different for arrays (see
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// below). Our behavior is consistent and matches the bahavior of
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// KJS.
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var proto = { length:3, 0:'zero', 1:'one', 2:'two' }
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function constructor() {};
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constructor.prototype = proto;
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// Set elements on the array prototype.
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Array.prototype[0] = 'zero';
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Array.prototype[1] = 'one';
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Array.prototype[2] = 'two';
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// ----------------------------------------------------------------------
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// Helper functions.
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// ----------------------------------------------------------------------
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function assertHasOwnProperties(object, limit) {
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for (var i = 0; i < limit; i++) {
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assertTrue(object.hasOwnProperty(i));
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}
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}
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// ----------------------------------------------------------------------
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// shift.
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// ----------------------------------------------------------------------
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function runTest1() {
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var nonArray = new constructor();
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var array = ['zero', , 'two'];
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// Shift away the zero.
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assertEquals('zero', array.shift());
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assertEquals('zero', Array.prototype.shift.call(nonArray));
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// Check that the local object has properties 0 and 1 with the right
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// values.
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assertEquals(2, array.length);
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assertEquals(2, nonArray.length);
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assertHasOwnProperties(array, 2);
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assertHasOwnProperties(nonArray, 2);
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// Note: Spidermonkey is inconsistent here. It treats arrays
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// differently from non-arrays. It only consults the prototype for
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// non-arrays. Therefore, array[0] is undefined in Spidermonkey and
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// 'one' in V8 and KJS.
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assertEquals('one', array[0]);
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assertEquals('one', nonArray[0]);
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assertEquals('two', array[1]);
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assertEquals('two', nonArray[1]);
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// Get index 2 from the prototype.
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assertEquals('two', array[2]);
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assertEquals('two', nonArray[2]);
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}
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runTest1();
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// ----------------------------------------------------------------------
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// unshift.
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// ----------------------------------------------------------------------
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runTest2 = function() {
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var nonArray = new constructor();
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var array = ['zero', , 'two'];
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// Unshift a new 'zero'.
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assertEquals(4, array.unshift('zero'));
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assertEquals(4, Array.prototype.unshift.call(nonArray, 'zero'));
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// Check that the local object has properties 0 through 3 with the
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// right values.
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assertEquals(4, array.length);
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assertEquals(4, nonArray.length);
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assertHasOwnProperties(array, 4);
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assertHasOwnProperties(nonArray, 4);
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assertEquals('zero', array[0]);
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assertEquals('zero', nonArray[0]);
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assertEquals('zero', array[1]);
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assertEquals('zero', nonArray[1]);
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// Again Spidermonkey is inconsistent. array[2] is undefined
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// instead of 'one'.
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assertEquals('one', array[2]);
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assertEquals('one', nonArray[2]);
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assertEquals('two', array[3]);
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assertEquals('two', nonArray[3]);
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}
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runTest2();
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// ----------------------------------------------------------------------
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// splice
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// ----------------------------------------------------------------------
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runTest3 = function() {
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var nonArray = new constructor();
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var array = ['zero', , 'two'];
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// Delete the first element by splicing in nothing.
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assertArrayEquals(['zero'], array.splice(0, 1));
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assertArrayEquals(['zero'], Array.prototype.splice.call(nonArray, 0, 1));
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// Check that the local object has properties 0 and 1 with the right
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// values.
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assertEquals(2, array.length);
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assertEquals(2, nonArray.length);
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assertHasOwnProperties(array, 2);
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assertHasOwnProperties(nonArray, 2);
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// Again Spidermonkey is inconsistent. array[0] is undefined
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// instead of 'one'.
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assertEquals('one', array[0]);
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assertEquals('one', nonArray[0]);
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assertEquals('two', array[1]);
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assertEquals('two', nonArray[1]);
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// Get index 2 from the prototype.
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assertEquals('two', array[2]);
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assertEquals('two', nonArray[2]);
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};
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runTest3();
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// ----------------------------------------------------------------------
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// slice
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// ----------------------------------------------------------------------
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runTest4 = function() {
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var nonArray = new constructor();
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var array = ['zero', , 'two'];
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// Again Spidermonkey is inconsistent. (array.slice(0, 3))[1] is
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// undefined instead of 'one'.
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assertArrayEquals(['zero', 'one', 'two'], array.slice(0, 3));
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assertArrayEquals(['zero', 'one', 'two'], Array.prototype.slice.call(nonArray, 0, 3));
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};
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runTest4();
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