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Edit File: string-index.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. /** * @fileoverview Test indexing on strings with []. */ var foo = "Foo"; assertEquals("Foo", foo); assertEquals("F", foo[0]); assertEquals("o", foo[1]); assertEquals("o", foo[2]); // Test string keyed load IC. for (var i = 0; i < 10; i++) { assertEquals("F", foo[0]); assertEquals("o", foo[1]); assertEquals("o", foo[2]); assertEquals("F", (foo[0] + "BarBazQuuxFooBarQuux")[0]); } assertEquals("F", foo["0" + ""], "string index"); assertEquals("o", foo["1"], "string index"); assertEquals("o", foo["2"], "string index"); assertEquals("undefined", typeof(foo[3]), "out of range"); // SpiderMonkey 1.5 fails this next one. So does FF 2.0.6. assertEquals("undefined", typeof(foo[-1]), "known failure in SpiderMonkey 1.5"); assertEquals("undefined", typeof(foo[-2]), "negative index"); foo[0] = "f"; assertEquals("Foo", foo); foo[3] = "t"; assertEquals("Foo", foo); assertEquals("undefined", typeof(foo[3]), "out of range"); assertEquals("undefined", typeof(foo[-2]), "negative index"); var S = new String("foo"); assertEquals(Object("foo"), S); assertEquals("f", S[0], "string object"); assertEquals("f", S["0"], "string object"); S[0] = 'bente'; assertEquals("f", S[0], "string object"); assertEquals("f", S["0"], "string object"); S[-2] = 'spider'; assertEquals('spider', S[-2]); S[3] = 'monkey'; assertEquals('monkey', S[3]); S['foo'] = 'Fu'; assertEquals("Fu", S.foo); // In FF this is ignored I think. In V8 it puts a property on the String object // but you won't ever see it because it is hidden by the 0th character in the // string. The net effect is pretty much the same. S["0"] = 'bente'; assertEquals("f", S[0], "string object"); assertEquals("f", S["0"], "string object"); assertEquals(true, 0 in S, "0 in"); assertEquals(false, -1 in S, "-1 in"); assertEquals(true, 2 in S, "2 in"); assertEquals(true, 3 in S, "3 in"); assertEquals(false, 4 in S, "3 in"); assertEquals(true, "0" in S, '"0" in'); assertEquals(false, "-1" in S, '"-1" in'); assertEquals(true, "2" in S, '"2" in'); assertEquals(true, "3" in S, '"3" in'); assertEquals(false, "4" in S, '"3" in'); assertEquals(true, S.hasOwnProperty(0), "0 hasOwnProperty"); assertEquals(false, S.hasOwnProperty(-1), "-1 hasOwnProperty"); assertEquals(true, S.hasOwnProperty(2), "2 hasOwnProperty"); assertEquals(true, S.hasOwnProperty(3), "3 hasOwnProperty"); assertEquals(false, S.hasOwnProperty(4), "3 hasOwnProperty"); assertEquals(true, S.hasOwnProperty("0"), '"0" hasOwnProperty'); assertEquals(false, S.hasOwnProperty("-1"), '"-1" hasOwnProperty'); assertEquals(true, S.hasOwnProperty("2"), '"2" hasOwnProperty'); assertEquals(true, S.hasOwnProperty("3"), '"3" hasOwnProperty'); assertEquals(false, S.hasOwnProperty("4"), '"3" hasOwnProperty'); assertEquals(true, "foo".hasOwnProperty(0), "foo 0 hasOwnProperty"); assertEquals(false, "foo".hasOwnProperty(-1), "foo -1 hasOwnProperty"); assertEquals(true, "foo".hasOwnProperty(2), "foo 2 hasOwnProperty"); assertEquals(false, "foo".hasOwnProperty(4), "foo 3 hasOwnProperty"); assertEquals(true, "foo".hasOwnProperty("0"), 'foo "0" hasOwnProperty'); assertEquals(false, "foo".hasOwnProperty("-1"), 'foo "-1" hasOwnProperty'); assertEquals(true, "foo".hasOwnProperty("2"), 'foo "2" hasOwnProperty'); assertEquals(false, "foo".hasOwnProperty("4"), 'foo "3" hasOwnProperty'); //assertEquals(true, 0 in "foo", "0 in"); //assertEquals(false, -1 in "foo", "-1 in"); //assertEquals(true, 2 in "foo", "2 in"); //assertEquals(false, 3 in "foo", "3 in"); // //assertEquals(true, "0" in "foo", '"0" in'); //assertEquals(false, "-1" in "foo", '"-1" in'); //assertEquals(true, "2" in "foo", '"2" in'); //assertEquals(false, "3" in "foo", '"3" in'); delete S[3]; assertEquals("undefined", typeof(S[3])); assertEquals(false, 3 in S); assertEquals(false, "3" in S); var N = new Number(43); assertEquals(Object(43), N); N[-2] = "Alpha"; assertEquals("Alpha", N[-2]); N[0] = "Zappa"; assertEquals("Zappa", N[0]); assertEquals("Zappa", N["0"]); var A = ["V", "e", "t", "t", "e", "r"]; var A2 = (A[0] = "v"); assertEquals('v', A[0]); assertEquals('v', A2); var S = new String("Onkel"); var S2 = (S[0] = 'o'); assertEquals('O', S[0]); assertEquals('o', S2); var s = "Tante"; var s2 = (s[0] = 't'); assertEquals('T', s[0]); assertEquals('t', s2); var S2 = (S[-2] = 'o'); assertEquals('o', S[-2]); assertEquals('o', S2); var s2 = (s[-2] = 't'); assertEquals('undefined', typeof(s[-2])); assertEquals('t', s2); // Make sure enough of the one-char string cache is filled. var alpha = ['@']; for (var i = 1; i < 128; i++) { var c = String.fromCharCode(i); alpha[i] = c[0]; } var alphaStr = alpha.join(""); // Now test chars. for (var i = 1; i < 128; i++) { assertEquals(alpha[i], alphaStr[i]); assertEquals(String.fromCharCode(i), alphaStr[i]); } // Test for keyed ic. var foo = ['a12', ['a', 2, 'c'], 'a31', 42]; var results = [1, 2, 3, NaN]; for (var i = 0; i < 200; ++i) { var index = Math.floor(i / 50); var receiver = foo[index]; var expected = results[index]; var actual = +(receiver[1]); assertEquals(expected, actual); } var keys = [0, '1', 2, 3.0, -1, 10]; var str = 'abcd', arr = ['a', 'b', 'c', 'd', undefined, undefined]; for (var i = 0; i < 300; ++i) { var index = Math.floor(i / 50); var key = keys[index]; var expected = arr[index]; var actual = str[key]; assertEquals(expected, actual); } // Test heap number case. var keys = [0, Math.floor(2) * 0.5]; var str = 'ab', arr = ['a', 'b']; for (var i = 0; i < 100; ++i) { var index = Math.floor(i / 50); var key = keys[index]; var expected = arr[index]; var actual = str[key]; assertEquals(expected, actual); } // Test negative zero case. var keys = [0, -0.0]; var str = 'ab', arr = ['a', 'a']; for (var i = 0; i < 100; ++i) { var index = Math.floor(i / 50); var key = keys[index]; var expected = arr[index]; var actual = str[key]; assertEquals(expected, actual); } // Test "not-an-array-index" case. var keys = [0, 0.5]; var str = 'ab', arr = ['a', undefined]; for (var i = 0; i < 100; ++i) { var index = Math.floor(i / 50); var key = keys[index]; var expected = arr[index]; var actual = str[key]; assertEquals(expected, actual); } // Test out of range case. var keys = [0, -1]; var str = 'ab', arr = ['a', undefined]; for (var i = 0; i < 100; ++i) { var index = Math.floor(i / 50); var key = keys[index]; var expected = arr[index]; var actual = str[key]; assertEquals(expected, actual); } var keys = [0, 10]; var str = 'ab', arr = ['a', undefined]; for (var i = 0; i < 100; ++i) { var index = Math.floor(i / 50); var key = keys[index]; var expected = arr[index]; var actual = str[key]; assertEquals(expected, actual); } // Test two byte string. var str = '\u0427', arr = ['\u0427']; for (var i = 0; i < 50; ++i) { var expected = arr[0]; var actual = str[0]; assertEquals(expected, actual); }