tests/mozilla/ecma_2/Statements/while-002.js

   1 /**
   2  *  File Name:          while-002
   3  *  ECMA Section:
   4  *  Description:        while statement
   5  *
   6  *  Verify that the while statement is not executed if the while expression is
   7  *  false
   8  *
   9  *  Author:             christine@netscape.com
  10  *  Date:               11 August 1998
  11  */
  12     var SECTION = "while-002";
  13     var VERSION = "ECMA_2";
  14     var TITLE   = "while statement";
  15
  16     startTest();
  17     writeHeaderToLog( SECTION + " "+ TITLE);
  18
  19     var tc = 0;
  20     var testcases = new Array();
  21
  22     DoWhile( new DoWhileObject(
  23                 "while expression is null",
  24                 null,
  25                 "result = \"fail: should not have evaluated statements in while block;break"
  26                ) );
  27
  28     DoWhile( new DoWhileObject(
  29                 "while expression is undefined",
  30                 void 0,
  31                 "result = \"fail: should not have evaluated statements in while block; break"
  32              ));
  33
  34     DoWhile( new DoWhileObject(
  35              "while expression is 0",
  36              0,
  37              "result = \"fail: should not have evaluated statements in while block; break;"
  38              ));
  39
  40     DoWhile( new DoWhileObject(
  41              "while expression is eval(\"\")",
  42              eval(""),
  43             "result = \"fail: should not have evaluated statements in while block; break"
  44             ));
  45
  46     DoWhile( new DoWhileObject(
  47             "while expression is NaN",
  48             NaN,
  49             "result = \"fail: should not have evaluated statements in while block; break"
  50             ));
  51
  52     test();
  53
  54     function DoWhileObject( d, e, s ) {
  55         this.description = d;
  56         this.whileExpression = e;
  57         this.statements = s;
  58     }
  59
  60     function DoWhile( object ) {
  61         result = "pass";
  62
  63         while ( expression = object.whileExpression ) {
  64             eval( object.statements );
  65         }
  66
  67         // verify that the while expression was evaluated
  68
  69         testcases[tc++] = new TestCase(
  70             SECTION,
  71             "verify that while expression was evaluated (should be "+
  72                 object.whileExpression +")",
  73             "pass",
  74             (object.whileExpression == expression ||
  75                ( isNaN(object.whileExpression) && isNaN(expression) )
  76              ) ? "pass" : "fail" );
  77
  78         testcases[tc++] = new TestCase(
  79             SECTION,
  80             object.description,
  81             "pass",
  82             result );
  83     }