Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. |
| 3 | // |
| 4 | // Redistribution and use in source and binary forms, with or without |
| 5 | // modification, are permitted provided that the following conditions |
| 6 | // are met: |
| 7 | // 1. Redistributions of source code must retain the above copyright |
| 8 | // notice, this list of conditions and the following disclaimer. |
| 9 | // 2. Redistributions in binary form must reproduce the above copyright |
| 10 | // notice, this list of conditions and the following disclaimer in the |
| 11 | // documentation and/or other materials provided with the distribution. |
| 12 | // |
| 13 | // THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY |
| 14 | // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 15 | // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 16 | // DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| 17 | // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 18 | // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 19 | // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 20 | // ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 21 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 22 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 23 | |
| 24 | description( |
| 25 | "Tests variable resolution rules for named function expressions." |
| 26 | ); |
| 27 | |
| 28 | function Call(lambda) { return lambda(); } |
| 29 | |
| 30 | debug("anonymous function expression"); |
| 31 | shouldBe("var x = (function(a,b){ return a + b; }); x(1,2)", "3"); |
| 32 | |
| 33 | debug("named function expression"); |
| 34 | shouldBe("var x = (function Named(a,b){ return a + b; }); x(2,3)", "5"); |
| 35 | |
| 36 | debug("eval'd code should be able to access scoped variables"); |
| 37 | shouldBe("var z = 6; var x = eval('(function(a,b){ return a + b + z; })'); x(3,4)", "13"); |
| 38 | |
| 39 | debug("eval'd code + self-check"); |
| 40 | shouldBe("var z = 10; var x = eval('(function Named(a,b){ return (!!Named) ? (a + b + z) : -999; })'); x(4,5)", "19"); |
| 41 | |
| 42 | debug("named function expressions are not saved in the current context"); |
| 43 | shouldBe('(function Foo(){ return 1; }); try { Foo(); throw "FuncExpr was stored"; } catch(e) { if(typeof(e)=="string") throw e; } 1', "1"); |
| 44 | |
| 45 | debug("recursion is possible, though"); |
| 46 | shouldBe("var ctr = 3; var x = (function Named(a,b){ if(--ctr) return 2 * Named(a,b); else return a + b; }); x(5,6)", "44"); |
| 47 | |
| 48 | debug("regression test where kjs regarded an anonymous function declaration (which is illegal) as a FunctionExpr"); |
| 49 | shouldBe('var hadError = 0; try { eval("function(){ return 2; };"); } catch(e) { hadError = 1; }; hadError;', "1"); |
| 50 | |
| 51 | debug("\n-----\n"); |
| 52 | |
| 53 | function shouldBeTrueWithDescription(x, xDescription) |
| 54 | { |
| 55 | if (x) { |
| 56 | debug("PASS: " + xDescription + " should be true and is."); |
| 57 | return; |
| 58 | } |
| 59 | |
| 60 | debug("FAIL: " + xDescription + " should be true but isn't."); |
| 61 | } |
| 62 | |
| 63 | // Recursion. |
| 64 | shouldBeTrueWithDescription( |
| 65 | (function closure() { return closure == arguments.callee && !this.closure; })(), |
| 66 | "(function closure() { return closure == arguments.callee && !this.closure; })()" |
| 67 | ); |
| 68 | |
| 69 | // Assignment. |
| 70 | shouldBeTrueWithDescription( |
| 71 | (function closure() { closure = 1; return closure == arguments.callee && !this.closure; })(), |
| 72 | "(function closure() { closure = 1; return closure == arguments.callee && !this.closure; })()" |
| 73 | ); |
| 74 | |
| 75 | // Function name vs parameter. |
| 76 | shouldBeTrueWithDescription( |
| 77 | (function closure(closure) { return closure == 1 && !this.closure; })(1), |
| 78 | "(function closure(closure) { return closure == 1 && !this.closure; })(1)" |
| 79 | ); |
| 80 | |
| 81 | // Function name vs var. |
| 82 | shouldBeTrueWithDescription( |
| 83 | (function closure() { var closure = 1; return closure == 1 && !this.closure; })(), |
| 84 | "(function closure() { var closure = 1; return closure == 1 && !this.closure; })()" |
| 85 | ); |
| 86 | |
| 87 | // Function name vs declared function. |
| 88 | shouldBeTrueWithDescription( |
| 89 | (function closure() { function closure() { }; return closure != arguments.callee && !this.closure; })(), |
| 90 | "(function closure() { function closure() { }; return closure != arguments.callee && !this.closure; })()" |
| 91 | ); |
| 92 | |
| 93 | // Resolve before tear-off. |
| 94 | shouldBeTrueWithDescription( |
| 95 | (function closure() { return (function() { return closure && !this.closure; })(); })(), |
| 96 | "(function closure() { return (function() { return closure && !this.closure; })(); })()" |
| 97 | ); |
| 98 | |
| 99 | // Resolve assignment before tear-off. |
| 100 | shouldBeTrueWithDescription( |
| 101 | (function closure() { return (function() { closure = null; return closure && !this.closure; })(); })(), |
| 102 | "(function closure() { return (function() { closure = null; return closure && !this.closure; })(); })()" |
| 103 | ); |
| 104 | |
| 105 | // Resolve after tear-off. |
| 106 | shouldBeTrueWithDescription( |
| 107 | (function closure() { return (function() { return closure && !this.closure; }); })()(), |
| 108 | "(function closure() { return (function() { return closure && !this.closure; }); })()()" |
| 109 | ); |
| 110 | |
| 111 | // Resolve assignment after tear-off. |
| 112 | shouldBeTrueWithDescription( |
| 113 | (function closure() { return (function() { closure = null; return closure && !this.closure; }); })()(), |
| 114 | "(function closure() { return (function() { closure = null; return closure && !this.closure; }); })()()" |
| 115 | ); |
| 116 | |
| 117 | // Eval var shadowing (should overwrite). |
| 118 | shouldBeTrueWithDescription( |
| 119 | (function closure() { eval("var closure"); return closure == undefined && !this.closure; })(), |
| 120 | "(function closure() { eval(\"var closure\"); return closure == undefined && !this.closure; })()" |
| 121 | ); |
| 122 | |
| 123 | // Eval function shadowing (should overwrite). |
| 124 | shouldBeTrueWithDescription( |
| 125 | (function closure() { eval("function closure() { }"); return closure != arguments.callee && !this.closure; })(), |
| 126 | "(function closure() { eval(\"function closure() { }\"); return closure != arguments.callee && !this.closure; })()" |
| 127 | ); |
| 128 | |
| 129 | // Eval shadowing (should overwrite), followed by put (should overwrite). |
| 130 | shouldBeTrueWithDescription( |
| 131 | (function closure() { eval("var closure;"); closure = 1; return closure == 1 && !this.closure; })(), |
| 132 | "(function closure() { eval(\"var closure;\"); closure = 1; return closure == 1 && !this.closure; })()" |
| 133 | ); |
| 134 | |
| 135 | // Eval var shadowing, followed by delete (should not overwrite). |
| 136 | shouldBeTrueWithDescription( |
| 137 | (function closure() { eval("var closure"); delete closure; return closure == arguments.callee && !this.closure; })(), |
| 138 | "(function closure() { eval(\"var closure\"); delete closure; return closure == arguments.callee && !this.closure; })()" |
| 139 | ); |
| 140 | |
| 141 | // Eval function shadowing, followed by delete (should not overwrite). |
| 142 | shouldBeTrueWithDescription( |
| 143 | (function closure() { eval("function closure() { }"); delete closure; return closure == arguments.callee && !this.closure; })(), |
| 144 | "(function closure() { eval(\"function closure() { }\"); delete closure; return closure == arguments.callee && !this.closure; })()" |
| 145 | ); |
| 146 | |
| 147 | // Eval assignment (should not overwrite). |
| 148 | shouldBeTrueWithDescription( |
| 149 | (function closure() { eval("closure = 1;"); return closure == arguments.callee && !this.closure; })(), |
| 150 | "(function closure() { eval(\"closure = 1;\"); return closure == arguments.callee && !this.closure; })()" |
| 151 | ); |