tests/mozilla/ecma/Expressions/11.6.1-3.js

   1 /* The contents of this file are subject to the Netscape Public
   2  * License Version 1.1 (the "License"); you may not use this file
   3  * except in compliance with the License. You may obtain a copy of
   4  * the License at http://www.mozilla.org/NPL/
   5  *
   6  * Software distributed under the License is distributed on an "AS
   7  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
   8  * implied. See the License for the specific language governing
   9  * rights and limitations under the License.
  10  *
  11  * The Original Code is Mozilla Communicator client code, released March
  12  * 31, 1998.
  13  *
  14  * The Initial Developer of the Original Code is Netscape Communications
  15  * Corporation. Portions created by Netscape are
  16  * Copyright (C) 1998 Netscape Communications Corporation. All
  17  * Rights Reserved.
  18  *
  19  * Contributor(s):
  20  *
  21  */
  22 /**
  23     File Name:          11.6.1-3.js
  24     ECMA Section:       11.6.1 The addition operator ( + )
  25     Description:
  26
  27     The addition operator either performs string concatenation or numeric
  28     addition.
  29
  30     The production AdditiveExpression : AdditiveExpression + MultiplicativeExpression
  31     is evaluated as follows:
  32
  33     1.  Evaluate AdditiveExpression.
  34     2.  Call GetValue(Result(1)).
  35     3.  Evaluate MultiplicativeExpression.
  36     4.  Call GetValue(Result(3)).
  37     5.  Call ToPrimitive(Result(2)).
  38     6.  Call ToPrimitive(Result(4)).
  39     7.  If Type(Result(5)) is String or Type(Result(6)) is String, go to step 12.
  40         (Note that this step differs from step 3 in the algorithm for comparison
  41         for the relational operators in using or instead of and.)
  42     8.  Call ToNumber(Result(5)).
  43     9.  Call ToNumber(Result(6)).
  44     10. Apply the addition operation to Result(8) and Result(9). See the discussion below (11.6.3).
  45     11. Return Result(10).
  46     12. Call ToString(Result(5)).
  47     13. Call ToString(Result(6)).
  48     14. Concatenate Result(12) followed by Result(13).
  49     15. Return Result(14).
  50
  51     Note that no hint is provided in the calls to ToPrimitive in steps 5 and 6.
  52     All native ECMAScript objects except Date objects handle the absence of a
  53     hint as if the hint Number were given; Date objects handle the absence of a
  54     hint as if the hint String were given. Host objects may handle the absence
  55     of a hint in some other manner.
  56
  57     This test does only covers cases where the Additive or Mulplicative expression
  58     is a Date.
  59
  60     Author:             christine@netscape.com
  61     Date:               12 november 1997
  62 */
  63     var SECTION = "11.6.1-3";
  64     var VERSION = "ECMA_1";
  65     startTest();
  66     var testcases = getTestCases();
  67
  68     writeHeaderToLog( SECTION + " The Addition operator ( + )");
  69     test();
  70
  71 function test() {
  72     for ( tc=0; tc < testcases.length; tc++ ) {
  73         testcases[tc].passed = writeTestCaseResult(
  74                             testcases[tc].expect,
  75                             testcases[tc].actual,
  76                             testcases[tc].description +" = "+
  77                             testcases[tc].actual );
  78
  79         testcases[tc].reason += ( testcases[tc].passed ) ? "" : "wrong value ";
  80     }
  81     stopTest();
  82     return ( testcases );
  83 }
  84 function getTestCases() {
  85     var array = new Array();
  86     var item = 0;
  87
  88     // tests for boolean primitive, boolean object, Object object, a "MyObject" whose value is
  89     // a boolean primitive and a boolean object, and "MyValuelessObject", where the value is
  90     // set in the object's prototype, not the object itself.
  91
  92     var DATE1 = new Date();
  93
  94     array[item++] = new TestCase(   SECTION,
  95                                     "var DATE1 = new Date(); DATE1 + DATE1",
  96                                     DATE1.toString() + DATE1.toString(),
  97                                     DATE1 + DATE1 );
  98
  99     array[item++] = new TestCase(   SECTION,
 100                                     "var DATE1 = new Date(); DATE1 + 0",
 101                                     DATE1.toString() + 0,
 102                                     DATE1 + 0 );
 103
 104     array[item++] = new TestCase(   SECTION,
 105                                     "var DATE1 = new Date(); DATE1 + new Number(0)",
 106                                     DATE1.toString() + 0,
 107                                     DATE1 + new Number(0) );
 108
 109     array[item++] = new TestCase(   SECTION,
 110                                     "var DATE1 = new Date(); DATE1 + true",
 111                                     DATE1.toString() + "true",
 112                                     DATE1 + true );
 113
 114     array[item++] = new TestCase(   SECTION,
 115                                     "var DATE1 = new Date(); DATE1 + new Boolean(true)",
 116                                     DATE1.toString() + "true",
 117                                     DATE1 + new Boolean(true) );
 118
 119     array[item++] = new TestCase(   SECTION,
 120                                     "var DATE1 = new Date(); DATE1 + new Boolean(true)",
 121                                     DATE1.toString() + "true",
 122                                     DATE1 + new Boolean(true) );
 123
 124     var MYOB1 = new MyObject( DATE1 );
 125     var MYOB2 = new MyValuelessObject( DATE1 );
 126     var MYOB3 = new MyProtolessObject( DATE1 );
 127     var MYOB4 = new MyProtoValuelessObject( DATE1 );
 128
 129     array[item++] = new TestCase(   SECTION,
 130                                     "MYOB1 = new MyObject(DATE1); MYOB1 + new Number(1)",
 131                                     "[object Object]1",
 132                                     MYOB1 + new Number(1) );
 133
 134     array[item++] = new TestCase(   SECTION,
 135                                     "MYOB1 = new MyObject(DATE1); MYOB1 + 1",
 136                                     "[object Object]1",
 137                                     MYOB1 + 1 );
 138
 139     array[item++] = new TestCase(   SECTION,
 140                                     "MYOB2 = new MyValuelessObject(DATE1); MYOB3 + 'string'",
 141                                     DATE1.toString() + "string",
 142                                     MYOB2 + 'string' );
 143
 144     array[item++] = new TestCase(   SECTION,
 145                                     "MYOB2 = new MyValuelessObject(DATE1); MYOB3 + new String('string')",
 146                                     DATE1.toString() + "string",
 147                                     MYOB2 + new String('string') );
 148 /*
 149     array[item++] = new TestCase(   SECTION,
 150                                     "MYOB3 = new MyProtolessObject(DATE1); MYOB3 + new Boolean(true)",
 151                                     DATE1.toString() + "true",
 152                                     MYOB3 + new Boolean(true) );
 153 */
 154     array[item++] = new TestCase(   SECTION,
 155                                     "MYOB1 = new MyObject(DATE1); MYOB1 + true",
 156                                     "[object Object]true",
 157                                     MYOB1 + true );
 158
 159     return ( array );
 160 }
 161 function MyProtoValuelessObject() {
 162     this.valueOf = new Function ( "" );
 163     this.__proto__ = null;
 164 }
 165 function MyProtolessObject( value ) {
 166     this.valueOf = new Function( "return this.value" );
 167     this.__proto__ = null;
 168     this.value = value;
 169 }
 170 function MyValuelessObject(value) {
 171     this.__proto__ = new MyPrototypeObject(value);
 172 }
 173 function MyPrototypeObject(value) {
 174     this.valueOf = new Function( "return this.value;" );
 175     this.toString = new Function( "return (this.value + '');" );
 176     this.value = value;
 177 }
 178 function MyObject( value ) {
 179     this.valueOf = new Function( "return this.value" );
 180     this.value = value;
 181 }