Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1 | // Copyright 2009 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 | // Testing basic functionality of the arguments object. |
| 28 | // Introduced to ensure that the fast compiler does the right thing. |
| 29 | // The arguments object itself. |
| 30 | assertEquals(42, function(){ return arguments;}(42)[0], |
| 31 | "return arguments value"); |
| 32 | assertEquals(42, function(){ return arguments;}(42)[0], |
| 33 | "arguments in plain value context"); |
| 34 | assertEquals(42, function(){ arguments;return 42}(37), |
| 35 | "arguments in effect context"); |
| 36 | assertEquals(42, function(){ if(arguments)return 42;}(), |
| 37 | "arguments in a boolean context"); |
| 38 | assertEquals(42, function(){ return arguments || true;}(42)[0], |
| 39 | "arguments in a short-circuit boolean context - or"); |
| 40 | assertEquals(true, function(){ return arguments && [true];}(42)[0], |
| 41 | "arguments in a short-circuit boolean context - and"); |
| 42 | assertEquals(42, function(){ arguments = 42; return 42;}(), |
| 43 | "arguments assignment"); |
| 44 | // Properties of the arguments object. |
| 45 | assertEquals(42, function(){ return arguments[0]; }(42), |
| 46 | "args[0] value returned"); |
| 47 | assertEquals(42, function(){ arguments[0]; return 42}(), |
| 48 | "args[0] value ignored"); |
| 49 | assertEquals(42, function(){ if (arguments[0]) return 42; }(37), |
| 50 | "args[0] to boolean"); |
| 51 | assertEquals(42, function(){ return arguments[0] || "no"; }(42), |
| 52 | "args[0] short-circuit boolean or true"); |
| 53 | assertEquals(42, function(){ return arguments[0] || 42; }(0), |
| 54 | "args[0] short-circuit boolean or false"); |
| 55 | assertEquals(37, function(){ return arguments[0] && 37; }(42), |
| 56 | "args[0] short-circuit boolean and true"); |
| 57 | assertEquals(0, function(){ return arguments[0] && 42; }(0), |
| 58 | "args[0] short-circuit boolean and false"); |
| 59 | assertEquals(42, function(){ arguments[0] = 42; return arguments[0]; }(37), |
| 60 | "args[0] assignment"); |
| 61 | // Link between arguments and parameters. |
| 62 | assertEquals(42, function(a) { arguments[0] = 42; return a; }(37), |
| 63 | "assign args[0]->a"); |
| 64 | assertEquals(42, function(a) { a = 42; return arguments[0]; }(37), |
| 65 | "assign a->args[0]"); |
| 66 | assertEquals(54, function(a, b) { arguments[1] = 54; return b; }(42, 37), |
| 67 | "assign args[1]->b:b"); |
| 68 | assertEquals(54, function(a, b) { b = 54; return arguments[1]; }(42, 47), |
| 69 | "assign b->args[1]:b"); |
| 70 | assertEquals(42, function(a, b) { arguments[1] = 54; return a; }(42, 37), |
| 71 | "assign args[1]->b:a"); |
| 72 | assertEquals(42, function(a, b) { b = 54; return arguments[0]; }(42, 47), |
| 73 | "assign b->args[1]:a"); |
| 74 | |
| 75 | // Capture parameters in nested contexts. |
| 76 | assertEquals(33, |
| 77 | function(a,b) { |
| 78 | return a + arguments[0] + |
| 79 | function(b){ return a + b + arguments[0]; }(b); }(7,6), |
| 80 | "captured parameters"); |
| 81 | assertEquals(42, function(a) { |
| 82 | arguments[0] = 42; |
| 83 | return function(b){ return a; }(); |
| 84 | }(37), |
| 85 | "capture value returned"); |
| 86 | assertEquals(42, |
| 87 | function(a) { |
| 88 | arguments[0] = 26; |
| 89 | return function(b){ a; return 42; }(); |
| 90 | }(37), |
| 91 | "capture value ignored"); |
| 92 | assertEquals(42, |
| 93 | function(a) { |
| 94 | arguments[0] = 26; |
| 95 | return function(b){ if (a) return 42; }(); |
| 96 | }(37), |
| 97 | "capture to boolean"); |
| 98 | assertEquals(42, |
| 99 | function(a) { |
| 100 | arguments[0] = 42; |
| 101 | return function(b){ return a || "no"; }(); |
| 102 | }(37), |
| 103 | "capture short-circuit boolean or true"); |
| 104 | assertEquals(0, |
| 105 | function(a) { |
| 106 | arguments[0] = 0; |
| 107 | return function(b){ return a && 42; }(); |
| 108 | }(37), |
| 109 | "capture short-circuit boolean and false"); |
| 110 | // Deeply nested. |
| 111 | assertEquals(42, |
| 112 | function(a,b) { |
| 113 | return arguments[2] + |
| 114 | function(){ |
| 115 | return b + |
| 116 | function() { |
| 117 | return a; |
| 118 | }(); |
| 119 | }(); |
| 120 | }(7,14,21), |
| 121 | "deep nested capture"); |
| 122 | |
| 123 | // Assignment to captured parameters. |
| 124 | assertEquals(42, function(a,b) { |
| 125 | arguments[1] = 11; |
| 126 | return a + function(){ a = b; return a; }() + a; |
| 127 | }(20, 37), "captured assignment"); |
| 128 | |
| 129 | // Inside non-function scopes. |
| 130 | assertEquals(42, |
| 131 | function(a) { |
| 132 | arguments[0] = 20; |
| 133 | with ({ b : 22 }) { return a + b; } |
| 134 | }(37), |
| 135 | "a in with"); |
| 136 | assertEquals(42, |
| 137 | function(a) { |
| 138 | with ({ b : 22 }) { return arguments[0] + b; } |
| 139 | }(20), |
| 140 | "args in with"); |
| 141 | assertEquals(42, |
| 142 | function(a) { |
| 143 | arguments[0] = 20; |
| 144 | with ({ b : 22 }) { |
| 145 | return function() { return a; }() + b; } |
| 146 | }(37), |
| 147 | "captured a in with"); |
| 148 | assertEquals(42, |
| 149 | function(a) { |
| 150 | arguments[0] = 12; |
| 151 | with ({ b : 22 }) { |
| 152 | return function f() { |
| 153 | try { throw 8 } catch(e) { return e + a }; |
| 154 | }() + b; |
| 155 | } |
| 156 | }(37), |
| 157 | "in a catch in a named function captured a in with "); |
| 158 | // Escaping arguments. |
| 159 | function weirdargs(a,b,c) { if (!a) return arguments; |
| 160 | return [b[2],c]; } |
| 161 | var args1 = weirdargs(false, null, 40); |
| 162 | var res = weirdargs(true, args1, 15); |
| 163 | assertEquals(40, res[0], "return old args element"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 164 | assertEquals(15, res[1], "return own args element"); |