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 ); 152
