js/tests/js1_5/Regress/regress-68498-004.js

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  38
  39 /*
  40  * Date: 15 Feb 2001
  41  *
  42  * SUMMARY:  self.eval(str) inside a function
  43  * NOTE: 'self' is just a variable used to capture the global JS object.
  44  *
  45  * See http://bugzilla.mozilla.org/show_bug.cgi?id=68498
  46  * See http://bugzilla.mozilla.org/showattachment.cgi?attach_id=25251
  47  * See http://bugzilla.mozilla.org/show_bug.cgi?id=69441 (!!!)
  48  *
  49  * Brendan:
  50  *
  51  * "ECMA-262 Edition 3, 10.1.3 requires a FunctionDeclaration parsed as part
  52  * of  a Program by eval to create a property of eval's caller's variable object.
  53  * This test evals in the body of a with statement, whose scope chain *is*
  54  * relevant to the effect of parsing the FunctionDeclaration."
  55  */
  56 //-----------------------------------------------------------------------------
  57 var gTestfile = 'regress-68498-004.js';
  58 var BUGNUMBER = 68498;
  59 var summary = 'Testing self.eval(str) inside a function';
  60 var statprefix = '; currently at expect[';
  61 var statsuffix = '] within test -';
  62 var sToEval='';
  63 var actual=[ ];
  64 var expect=[ ];
  65
  66
  67 // Capture a reference to the global object -
  68 var self = this;
  69
  70 // You shouldn't see this global variable's value in any printout -
  71 var x = 'outer';
  72
  73 // This function is the heart of the test -
  74 function f(o,s,x) {with(o) eval(s); return z;};
  75
  76 // Run-time statements to pass to the eval inside f
  77 sToEval += 'actual[0] = typeof g;'
  78 sToEval += 'function g(){actual[1]=(typeof w == "undefined"  ||  w); return x};'
  79 sToEval += 'actual[2] = w;'
  80 sToEval += 'actual[3] = typeof g;'
  81 sToEval += 'var z=g();'
  82
  83 // Set the actual-results array. The next line will set actual[0] - actual[4] in one shot
  84 actual[4] = f({w:44}, sToEval, 'inner');
  85 actual[5] = 'z' in self && z;
  86
  87
  88 /* Set the expected-results array.
  89  *
  90  *  Sample issue: why do we set expect[4] = 'inner'?  Look at actual[4]...
  91  *  1. The return value of f equals z, which is not defined at compile-time
  92  *  2. At run-time (via with(o) eval(s) inside f), z is defined as the return value of g
  93  *  3. At run-time (via with(o) eval(s) inside f), g is defined to return x
  94  *  4. In the scope of with(o), x is undefined
  95  *  5. Farther up the scope chain, x can be located as an argument of f
  96  *  6. The value of this argument at run-time is 'inner'
  97  *  7. Even farther up the scope chain, the name x can be found as a global variable
  98  *  8. The value of this global variable is 'outer', but we should NOT have gone
  99  *      this far up the scope chain to find x...therefore we expect 'inner'
 100  */
 101 expect[0] = 'function';
 102 expect[1] = 44;
 103 expect[2] = 44;
 104 expect[3] = 'function';
 105 expect[4] = 'inner';
 106 expect[5] = false;
 107
 108
 109
 110 //------------------------------------------------------------------------------------------------
 111 test();
 112 //-------------------------------------------------------------------------------------------------
 113
 114
 115 function test()
 116 {
 117   enterFunc ('test');
 118   printBugNumber(BUGNUMBER);
 119   printStatus (summary);
 120
 121   for (var i in expect)
 122   {
 123     reportCompare(expect[i], actual[i], getStatus(i));
 124   }
 125
 126   exitFunc ('test');
 127 }
 128
 129
 130 function getStatus(i)
 131 {
 132   return (summary  +  statprefix  +  i  +  statsuffix);
 133 }