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// Copyright 2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// This file contains a number of tests of array functions and their
// interaction with properties in the prototype chain.
//
// The behavior of SpiderMonkey is slightly different for arrays (see
// below). Our behavior is consistent and matches the bahavior of
// KJS.
var proto = { length:3, 0:'zero', 1:'one', 2:'two' }
function constructor() {};
constructor.prototype = proto;
// Set elements on the array prototype.
Array.prototype[0] = 'zero';
Array.prototype[1] = 'one';
Array.prototype[2] = 'two';
// ----------------------------------------------------------------------
// Helper functions.
// ----------------------------------------------------------------------
function assertHasOwnProperties(object, limit) {
for (var i = 0; i < limit; i++) {
assertTrue(object.hasOwnProperty(i));
}
}
// ----------------------------------------------------------------------
// shift.
// ----------------------------------------------------------------------
function runTest1() {
var nonArray = new constructor();
var array = ['zero', , 'two'];
// Shift away the zero.
assertEquals('zero', array.shift());
assertEquals('zero', Array.prototype.shift.call(nonArray));
// Check that the local object has properties 0 and 1 with the right
// values.
assertEquals(2, array.length);
assertEquals(2, nonArray.length);
assertHasOwnProperties(array, 2);
assertHasOwnProperties(nonArray, 2);
// Note: Spidermonkey is inconsistent here. It treats arrays
// differently from non-arrays. It only consults the prototype for
// non-arrays. Therefore, array[0] is undefined in Spidermonkey and
// 'one' in V8 and KJS.
assertEquals('one', array[0]);
assertEquals('one', nonArray[0]);
assertEquals('two', array[1]);
assertEquals('two', nonArray[1]);
// Get index 2 from the prototype.
assertEquals('two', array[2]);
assertEquals('two', nonArray[2]);
}
runTest1();
// ----------------------------------------------------------------------
// unshift.
// ----------------------------------------------------------------------
runTest2 = function() {
var nonArray = new constructor();
var array = ['zero', , 'two'];
// Unshift a new 'zero'.
assertEquals(4, array.unshift('zero'));
assertEquals(4, Array.prototype.unshift.call(nonArray, 'zero'));
// Check that the local object has properties 0 through 3 with the
// right values.
assertEquals(4, array.length);
assertEquals(4, nonArray.length);
assertHasOwnProperties(array, 4);
assertHasOwnProperties(nonArray, 4);
assertEquals('zero', array[0]);
assertEquals('zero', nonArray[0]);
assertEquals('zero', array[1]);
assertEquals('zero', nonArray[1]);
// Again Spidermonkey is inconsistent. array[2] is undefined
// instead of 'one'.
assertEquals('one', array[2]);
assertEquals('one', nonArray[2]);
assertEquals('two', array[3]);
assertEquals('two', nonArray[3]);
}
runTest2();
// ----------------------------------------------------------------------
// splice
// ----------------------------------------------------------------------
runTest3 = function() {
var nonArray = new constructor();
var array = ['zero', , 'two'];
// Delete the first element by splicing in nothing.
assertArrayEquals(['zero'], array.splice(0, 1));
assertArrayEquals(['zero'], Array.prototype.splice.call(nonArray, 0, 1));
// Check that the local object has properties 0 and 1 with the right
// values.
assertEquals(2, array.length);
assertEquals(2, nonArray.length);
assertHasOwnProperties(array, 2);
assertHasOwnProperties(nonArray, 2);
// Again Spidermonkey is inconsistent. array[0] is undefined
// instead of 'one'.
assertEquals('one', array[0]);
assertEquals('one', nonArray[0]);
assertEquals('two', array[1]);
assertEquals('two', nonArray[1]);
// Get index 2 from the prototype.
assertEquals('two', array[2]);
assertEquals('two', nonArray[2]);
};
runTest3();
// ----------------------------------------------------------------------
// slice
// ----------------------------------------------------------------------
runTest4 = function() {
var nonArray = new constructor();
var array = ['zero', , 'two'];
// Again Spidermonkey is inconsistent. (array.slice(0, 3))[1] is
// undefined instead of 'one'.
assertArrayEquals(['zero', 'one', 'two'], array.slice(0, 3));
assertArrayEquals(['zero', 'one', 'two'], Array.prototype.slice.call(nonArray, 0, 3));
};
runTest4();