JezK
Edit File: for-in-special-cases.js
// 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. // Flags: --expose-gc function for_in_null() { try { for (var x in null) { return false; } } catch(e) { return false; } return true; } function for_in_undefined() { try { for (var x in undefined) { return false; } } catch(e) { return false; } return true; } for (var i = 0; i < 10; ++i) { assertTrue(for_in_null()); gc(); } for (var j = 0; j < 10; ++j) { assertTrue(for_in_undefined()); gc(); } assertEquals(10, i); assertEquals(10, j); function Accumulate(x) { var accumulator = ""; for (var i in x) { accumulator += i; } return accumulator; } for (var i = 0; i < 3; ++i) { var elements = Accumulate("abcd"); // We do not assume that for-in enumerates elements in order. assertTrue(-1 != elements.indexOf("0")); assertTrue(-1 != elements.indexOf("1")); assertTrue(-1 != elements.indexOf("2")); assertTrue(-1 != elements.indexOf("3")); assertEquals(4, elements.length); } function for_in_string_prototype() { var x = new String("abc"); x.foo = 19; function B() { this.bar = 5; this[7] = 4; } B.prototype = x; var y = new B(); y.gub = 13; var elements = Accumulate(y); var elements1 = Accumulate(y); // If for-in returns elements in a different order on multiple calls, this // assert will fail. If that happens, consider if that behavior is OK. assertEquals(elements, elements1, "For-in elements not the same both times."); // We do not assume that for-in enumerates elements in order. assertTrue(-1 != elements.indexOf("0")); assertTrue(-1 != elements.indexOf("1")); assertTrue(-1 != elements.indexOf("2")); assertTrue(-1 != elements.indexOf("7")); assertTrue(-1 != elements.indexOf("foo")); assertTrue(-1 != elements.indexOf("bar")); assertTrue(-1 != elements.indexOf("gub")); assertEquals(13, elements.length); elements = Accumulate(x); assertTrue(-1 != elements.indexOf("0")); assertTrue(-1 != elements.indexOf("1")); assertTrue(-1 != elements.indexOf("2")); assertTrue(-1 != elements.indexOf("foo")); assertEquals(6, elements.length); } for_in_string_prototype(); for_in_string_prototype();