Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | // Array's toString should call the object's own join method, if one exists and |
| 29 | // is callable. Otherwise, just use the original Object.toString function. |
| 30 | |
| 31 | var success = "[test success]"; |
| 32 | var expectedThis; |
| 33 | function testJoin() { |
| 34 | assertEquals(0, arguments.length); |
| 35 | assertSame(expectedThis, this); |
| 36 | return success; |
| 37 | } |
| 38 | |
| 39 | |
| 40 | // On an Array object. |
| 41 | |
| 42 | // Default case. |
| 43 | var a1 = [1, 2, 3]; |
| 44 | assertEquals(a1.join(), a1.toString()); |
| 45 | |
| 46 | // Non-standard "join" function is called correctly. |
| 47 | var a2 = [1, 2, 3]; |
| 48 | a2.join = testJoin; |
| 49 | expectedThis = a2; |
| 50 | assertEquals(success, a2.toString()); |
| 51 | |
| 52 | // Non-callable join function is ignored and Object.prototype.toString is |
| 53 | // used instead. |
| 54 | var a3 = [1, 2, 3]; |
| 55 | a3.join = "not callable"; |
| 56 | assertEquals("[object Array]", a3.toString()); |
| 57 | |
| 58 | // Non-existing join function is treated same as non-callable. |
| 59 | var a4 = [1, 2, 3]; |
| 60 | a4.__proto__ = { toString: Array.prototype.toString }; |
| 61 | // No join on Array. |
| 62 | assertEquals("[object Array]", a4.toString()); |
| 63 | |
| 64 | |
| 65 | // On a non-Array object. |
| 66 | |
| 67 | // Default looks-like-an-array case. |
| 68 | var o1 = {length: 3, 0: 1, 1: 2, 2: 3, |
| 69 | toString: Array.prototype.toString, |
| 70 | join: Array.prototype.join}; |
| 71 | assertEquals(o1.join(), o1.toString()); |
| 72 | |
| 73 | |
| 74 | // Non-standard join is called correctly. |
| 75 | // Check that we don't read, e.g., length before calling join. |
| 76 | var o2 = {toString : Array.prototype.toString, |
| 77 | join: testJoin, |
| 78 | get length() { assertUnreachable(); }, |
| 79 | get 0() { assertUnreachable(); }}; |
| 80 | expectedThis = o2; |
| 81 | assertEquals(success, o2.toString()); |
| 82 | |
| 83 | // Non-standard join is called even if it looks like an array. |
| 84 | var o3 = {length: 3, 0: 1, 1: 2, 2: 3, |
| 85 | toString: Array.prototype.toString, |
| 86 | join: testJoin}; |
| 87 | expectedThis = o3; |
| 88 | assertEquals(success, o3.toString()); |
| 89 | |
| 90 | // Non-callable join works same as for Array. |
| 91 | var o4 = {length: 3, 0: 1, 1: 2, 2: 3, |
| 92 | toString: Array.prototype.toString, |
| 93 | join: "not callable"}; |
| 94 | assertEquals("[object Object]", o4.toString()); |
| 95 | |
| 96 | |
| 97 | // Non-existing join works same as for Array. |
| 98 | var o5 = {length: 3, 0: 1, 1: 2, 2: 3, |
| 99 | toString: Array.prototype.toString |
| 100 | /* no join */}; |
| 101 | assertEquals("[object Object]", o5.toString()); |
| 102 | |
| 103 | |
| 104 | // Test that ToObject is called before getting "join", so the instance |
| 105 | // that "join" is read from is the same one passed as receiver later. |
| 106 | var called_before = false; |
| 107 | expectedThis = null; |
| 108 | Object.defineProperty(Number.prototype, "join", {get: function() { |
| 109 | assertFalse(called_before); |
| 110 | called_before = true; |
| 111 | expectedThis = this; |
| 112 | return testJoin; |
| 113 | }}); |
| 114 | Number.prototype.arrayToString = Array.prototype.toString; |
| 115 | assertEquals(success, (42).arrayToString()); |
| 116 | |
| 117 | // ---------------------------------------------------------- |
| 118 | // Testing Array.prototype.toLocaleString |
| 119 | |
| 120 | // Ensure that it never uses Array.prototype.toString for anything. |
| 121 | Array.prototype.toString = function() { assertUnreachable(); }; |
| 122 | |
| 123 | // Default case. |
| 124 | var la1 = [1, [2, 3], 4]; |
| 125 | assertEquals("1,2,3,4", la1.toLocaleString()); |
| 126 | |
| 127 | // Used on a string (which looks like an array of characters). |
| 128 | String.prototype.toLocaleString = Array.prototype.toLocaleString; |
| 129 | assertEquals("1,2,3,4", "1234".toLocaleString()); |
| 130 | |
| 131 | // If toLocaleString of element is not callable, throw a TypeError. |
| 132 | var la2 = [1, {toLocaleString: "not callable"}, 3]; |
| 133 | assertThrows(function() { la2.toLocaleString(); }, TypeError); |
| 134 | |
| 135 | // If toLocaleString of element is callable, call it. |
| 136 | var la3 = [1, {toLocaleString: function() { return "XX";}}, 3]; |
| 137 | assertEquals("1,XX,3", la3.toLocaleString()); |
| 138 | |
| 139 | // Omitted elements, as well as undefined and null, become empty string. |
| 140 | var la4 = [1, null, 3, undefined, 5,, 7]; |
| 141 | assertEquals("1,,3,,5,,7", la4.toLocaleString()); |
| 142 | |
| 143 | |
| 144 | // ToObject is called first and the same object is being used for the |
| 145 | // rest of the operations. |
| 146 | Object.defineProperty(Number.prototype, "length", { |
| 147 | get: function() { |
| 148 | exptectedThis = this; |
| 149 | return 3; |
| 150 | }}); |
| 151 | for (var i = 0; i < 3; i++) { |
| 152 | Object.defineProperty(Number.prototype, i, { |
| 153 | get: function() { |
| 154 | assertEquals(expectedThis, this); |
| 155 | return +this; |
| 156 | }}); |
| 157 | } |
| 158 | Number.prototype.arrayToLocaleString = Array.prototype.toLocaleString; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 159 | assertEquals("42,42,42", (42).arrayToLocaleString()); |