regress-68498-004.js (3226B)
1 /* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */ 2 /* This Source Code Form is subject to the terms of the Mozilla Public 3 * License, v. 2.0. If a copy of the MPL was not distributed with this 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 5 6 /* 7 * Date: 15 Feb 2001 8 * 9 * SUMMARY: self.eval(str) inside a function 10 * NOTE: 'self' is just a variable used to capture the global JS object. 11 * 12 * See http://bugzilla.mozilla.org/show_bug.cgi?id=68498 13 * See http://bugzilla.mozilla.org/showattachment.cgi?attach_id=25251 14 * See http://bugzilla.mozilla.org/show_bug.cgi?id=69441 (!!!) 15 * 16 * Brendan: 17 * 18 * "ECMA-262 Edition 3, 10.1.3 requires a FunctionDeclaration parsed as part 19 * of a Program by eval to create a property of eval's caller's variable object. 20 * This test evals in the body of a with statement, whose scope chain *is* 21 * relevant to the effect of parsing the FunctionDeclaration." 22 */ 23 //----------------------------------------------------------------------------- 24 var BUGNUMBER = 68498; 25 var summary = 'Testing self.eval(str) inside a function'; 26 var statprefix = '; currently at expect['; 27 var statsuffix = '] within test -'; 28 var sToEval=''; 29 var actual=[ ]; 30 var expect=[ ]; 31 32 33 // Capture a reference to the global object - 34 var self = this; 35 36 // You shouldn't see this global variable's value in any printout - 37 var x = 'outer'; 38 39 // This function is the heart of the test - 40 function f(o,s,x) {with(o) eval(s); return z;}; 41 42 // Run-time statements to pass to the eval inside f 43 sToEval += 'actual[0] = typeof g;' 44 sToEval += 'function g(){actual[1]=(typeof w == "undefined" || w); return x};' 45 sToEval += 'actual[2] = w;' 46 sToEval += 'actual[3] = typeof g;' 47 sToEval += 'var z=g();' 48 49 // Set the actual-results array. The next line will set actual[0] - actual[4] in one shot 50 actual[4] = f({w:44}, sToEval, 'inner'); 51 actual[5] = 'z' in self && z; 52 53 54 /* Set the expected-results array. 55 * 56 * Sample issue: why do we set expect[4] = 'inner'? Look at actual[4]... 57 * 1. The return value of f equals z, which is not defined at compile-time 58 * 2. At run-time (via with(o) eval(s) inside f), z is defined as the return value of g 59 * 3. At run-time (via with(o) eval(s) inside f), g is defined to return x 60 * 4. In the scope of with(o), x is undefined 61 * 5. Farther up the scope chain, x can be located as an argument of f 62 * 6. The value of this argument at run-time is 'inner' 63 * 7. Even farther up the scope chain, the name x can be found as a global variable 64 * 8. The value of this global variable is 'outer', but we should NOT have gone 65 * this far up the scope chain to find x...therefore we expect 'inner' 66 */ 67 expect[0] = 'function'; 68 expect[1] = 44; 69 expect[2] = 44; 70 expect[3] = 'function'; 71 expect[4] = 'inner'; 72 expect[5] = false; 73 74 75 76 //------------------------------------------------------------------------------------------------ 77 test(); 78 //------------------------------------------------------------------------------------------------- 79 80 81 function test() 82 { 83 printBugNumber(BUGNUMBER); 84 printStatus (summary); 85 86 for (var i in expect) 87 { 88 reportCompare(expect[i], actual[i], getStatus(i)); 89 } 90 } 91 92 93 function getStatus(i) 94 { 95 return (summary + statprefix + i + statsuffix); 96 }