Implement ES5 Array.isArray

test/mjsunit/third_party/array-isarray.js

+// Copyright (c) 2009 Apple Computer, Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+// 1. Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//
+// 2. 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.
+//
+// 3. Neither the name of the copyright holder(s) nor the names of any
+// 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.
+
+// Based on LayoutTests/fast/js/resources/Array-isArray.js
+
+assertTrue(Array.isArray([]));
+assertTrue(Array.isArray(new Array));
+assertTrue(Array.isArray(Array()));
+assertTrue(Array.isArray('abc'.match(/(a)*/g)));
+assertFalse((function(){ return Array.isArray(arguments); })());
+assertFalse(Array.isArray());
+assertFalse(Array.isArray(null));
+assertFalse(Array.isArray(undefined));
+assertFalse(Array.isArray(true));
+assertFalse(Array.isArray(false));
+assertFalse(Array.isArray('a string'));
+assertFalse(Array.isArray({}));
+assertFalse(Array.isArray({length: 5}));
+assertFalse(Array.isArray({__proto__: Array.prototype, length:1, 0:1, 1:2}));
+