tests/mozilla/ecma_2/Exceptions/expression-001.js

   1 /**
   2     File Name:          expression-001.js
   3     Corresponds to:     ecma/Expressions/11.12-2-n.js
   4     ECMA Section:       11.12
   5     Description:
   6
   7     The grammar for a ConditionalExpression in ECMAScript is a little bit
   8     different from that in C and Java, which each allow the second
   9     subexpression to be an Expression but restrict the third expression to
  10     be a ConditionalExpression.  The motivation for this difference in
  11     ECMAScript is to allow an assignment expression to be governed by either
  12     arm of a conditional and to eliminate the confusing and fairly useless
  13     case of a comma expression as the center expression.
  14
  15     Author:             christine@netscape.com
  16     Date:               09 september 1998
  17 */
  18     var SECTION = "expression-001";
  19     var VERSION = "JS1_4";
  20     var TITLE   = "Conditional operator ( ? : )"
  21     startTest();
  22     writeHeaderToLog( SECTION + " " + TITLE );
  23
  24     var tc = 0;
  25     var testcases = new Array();
  26
  27     // the following expression should be an error in JS.
  28
  29     var result = "Failed"
  30     var exception = "No exception was thrown";
  31
  32     try {
  33         eval("var MY_VAR = true ? \"EXPR1\", \"EXPR2\" : \"EXPR3\"");
  34     } catch ( e ) {
  35         result = "Passed";
  36         exception = e.toString();
  37     }
  38
  39     testcases[tc++] = new TestCase(
  40         SECTION,
  41         "comma expression in a conditional statement "+
  42         "(threw "+ exception +")",
  43         "Passed",
  44         result );
  45
  46
  47     test();