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250 lines
8.0 KiB
250 lines
8.0 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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/**
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* @fileoverview Test concat on small and large arrays
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*/
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(function testStringWrapperConcat() {
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var concat = Array.prototype.concat;
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var str = new String('abcd');
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assertEquals([1,2,3,new String('abcd')], [1, 2, 3].concat(str));
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assertEquals([new String("abcd")], concat.call(str));
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var array = [1, 2, 3];
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array.__proto__ = str;
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array.length = 4;
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assertEquals([1,2,3,'d'], concat.call(array));
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})()
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var poses;
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poses = [140, 4000000000];
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while (pos = poses.shift()) {
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var a = new Array(pos);
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var array_proto = [];
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a.__proto__ = array_proto;
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assertEquals(pos, a.length);
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a.push('foo');
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assertEquals(pos + 1, a.length);
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var b = ['bar'];
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var c = a.concat(b);
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assertEquals(pos + 2, c.length);
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assertEquals("undefined", typeof(c[pos - 1]));
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assertEquals("foo", c[pos]);
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assertEquals("bar", c[pos + 1]);
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// Can we fool the system by putting a number in a string?
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var onetwofour = "124";
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a[onetwofour] = 'doo';
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assertEquals(a[124], 'doo');
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c = a.concat(b);
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assertEquals(c[124], 'doo');
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// If we put a number in the prototype, then the spec says it should be
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// copied on concat.
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array_proto["123"] = 'baz';
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assertEquals(a[123], 'baz');
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c = a.concat(b);
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assertEquals(pos + 2, c.length);
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assertEquals("baz", c[123]);
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assertEquals("undefined", typeof(c[pos - 1]));
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assertEquals("foo", c[pos]);
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assertEquals("bar", c[pos + 1]);
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// When we take the number off the prototype it disappears from a, but
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// the concat put it in c itself.
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array_proto["123"] = undefined;
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assertEquals("undefined", typeof(a[123]));
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assertEquals("baz", c[123]);
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// If the element of prototype is shadowed, the element on the instance
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// should be copied, but not the one on the prototype.
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array_proto[123] = 'baz';
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a[123] = 'xyz';
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assertEquals('xyz', a[123]);
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c = a.concat(b);
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assertEquals('xyz', c[123]);
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// Non-numeric properties on the prototype or the array shouldn't get
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// copied.
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array_proto.moe = 'joe';
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a.ben = 'jerry';
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assertEquals(a["moe"], 'joe');
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assertEquals(a["ben"], 'jerry');
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c = a.concat(b);
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// ben was not copied
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assertEquals("undefined", typeof(c.ben));
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// When we take moe off the prototype it disappears from all arrays.
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array_proto.moe = undefined;
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assertEquals("undefined", typeof(c.moe));
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// Negative indices don't get concated.
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a[-1] = 'minus1';
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assertEquals("minus1", a[-1]);
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assertEquals("undefined", typeof(a[0xffffffff]));
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c = a.concat(b);
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assertEquals("undefined", typeof(c[-1]));
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assertEquals("undefined", typeof(c[0xffffffff]));
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assertEquals(c.length, a.length + 1);
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}
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poses = [140, 4000000000];
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while (pos = poses.shift()) {
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var a = new Array(pos);
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assertEquals(pos, a.length);
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a.push('foo');
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assertEquals(pos + 1, a.length);
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var b = ['bar'];
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var c = a.concat(b);
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assertEquals(pos + 2, c.length);
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assertEquals("undefined", typeof(c[pos - 1]));
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assertEquals("foo", c[pos]);
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assertEquals("bar", c[pos + 1]);
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// Can we fool the system by putting a number in a string?
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var onetwofour = "124";
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a[onetwofour] = 'doo';
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assertEquals(a[124], 'doo');
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c = a.concat(b);
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assertEquals(c[124], 'doo');
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// If we put a number in the prototype, then the spec says it should be
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// copied on concat.
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Array.prototype["123"] = 'baz';
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assertEquals(a[123], 'baz');
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c = a.concat(b);
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assertEquals(pos + 2, c.length);
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assertEquals("baz", c[123]);
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assertEquals("undefined", typeof(c[pos - 1]));
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assertEquals("foo", c[pos]);
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assertEquals("bar", c[pos + 1]);
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// When we take the number off the prototype it disappears from a, but
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// the concat put it in c itself.
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Array.prototype["123"] = undefined;
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assertEquals("undefined", typeof(a[123]));
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assertEquals("baz", c[123]);
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// If the element of prototype is shadowed, the element on the instance
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// should be copied, but not the one on the prototype.
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Array.prototype[123] = 'baz';
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a[123] = 'xyz';
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assertEquals('xyz', a[123]);
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c = a.concat(b);
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assertEquals('xyz', c[123]);
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// Non-numeric properties on the prototype or the array shouldn't get
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// copied.
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Array.prototype.moe = 'joe';
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a.ben = 'jerry';
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assertEquals(a["moe"], 'joe');
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assertEquals(a["ben"], 'jerry');
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c = a.concat(b);
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// ben was not copied
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assertEquals("undefined", typeof(c.ben));
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// moe was not copied, but we can see it through the prototype
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assertEquals("joe", c.moe);
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// When we take moe off the prototype it disappears from all arrays.
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Array.prototype.moe = undefined;
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assertEquals("undefined", typeof(c.moe));
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// Negative indices don't get concated.
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a[-1] = 'minus1';
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assertEquals("minus1", a[-1]);
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assertEquals("undefined", typeof(a[0xffffffff]));
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c = a.concat(b);
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assertEquals("undefined", typeof(c[-1]));
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assertEquals("undefined", typeof(c[0xffffffff]));
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assertEquals(c.length, a.length + 1);
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}
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a = [];
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c = a.concat('Hello');
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assertEquals(1, c.length);
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assertEquals("Hello", c[0]);
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assertEquals("Hello", c.toString());
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// Check that concat preserves holes.
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var holey = [void 0,'a',,'c'].concat(['d',,'f',[0,,2],void 0])
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assertEquals(9, holey.length); // hole in embedded array is ignored
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for (var i = 0; i < holey.length; i++) {
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if (i == 2 || i == 5) {
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assertFalse(i in holey);
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} else {
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assertTrue(i in holey);
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}
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}
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// Polluted prototype from prior tests.
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delete Array.prototype[123];
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// Check that concat reads getters in the correct order.
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var arr1 = [,2];
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var arr2 = [1,3];
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var r1 = [].concat(arr1, arr2); // [,2,1,3]
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assertEquals([,2,1,3], r1);
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// Make first array change length of second array.
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Object.defineProperty(arr1, 0, {get: function() {
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arr2.push("X");
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return undefined;
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}, configurable: true})
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var r2 = [].concat(arr1, arr2); // [undefined,2,1,3,"X"]
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assertEquals([undefined,2,1,3,"X"], r2);
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// Make first array change length of second array massively.
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arr2.length = 2;
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Object.defineProperty(arr1, 0, {get: function() {
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arr2[500000] = "X";
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return undefined;
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}, configurable: true})
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var r3 = [].concat(arr1, arr2); // [undefined,2,1,3,"X"]
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var expected = [undefined,2,1,3];
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expected[500000 + 2] = "X";
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assertEquals(expected, r3);
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var arr3 = [];
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var trace = [];
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var expectedTrace = []
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function mkGetter(i) { return function() { trace.push(i); }; }
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arr3.length = 10000;
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for (var i = 0; i < 100; i++) {
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Object.defineProperty(arr3, i * i, {get: mkGetter(i)});
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expectedTrace[i] = i;
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expectedTrace[100 + i] = i;
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}
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var r4 = [0].concat(arr3, arr3);
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assertEquals(1 + arr3.length * 2, r4.length);
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assertEquals(expectedTrace, trace);
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