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      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:          11.1.1.js
     24     ECMA Section:       11.1.1 The this keyword
     25     Description:
     26 
     27     The this keyword evaluates to the this value of the execution context.
     28 
     29     Author:             christine (at) netscape.com
     30     Date:               12 november 1997
     31 */
     32     var SECTION = "11.1.1";
     33     var VERSION = "ECMA_1";
     34     startTest();
     35 
     36     writeHeaderToLog( SECTION + " The this keyword");
     37 
     38     var testcases = new Array();
     39     var item = 0;
     40 
     41     var GLOBAL_OBJECT = this.toString();
     42 
     43     // this in global code and eval(this) in global code should return the global object.
     44 
     45     testcases[item++] = new TestCase(   SECTION,
     46                                         "Global Code: this.toString()",
     47                                         GLOBAL_OBJECT,
     48                                         this.toString() );
     49 
     50     testcases[item++] = new TestCase(   SECTION,
     51                                         "Global Code:  eval('this.toString()')",
     52                                         GLOBAL_OBJECT,
     53                                         eval('this.toString()') );
     54 
     55     // this in anonymous code called as a function should return the global object.
     56 
     57     testcases[item++] = new TestCase(   SECTION,
     58                                         "Anonymous Code: var MYFUNC = new Function('return this.toString()'); MYFUNC()",
     59                                         GLOBAL_OBJECT,
     60                                         eval("var MYFUNC = new Function('return this.toString()'); MYFUNC()") );
     61 
     62     // eval( this ) in anonymous code called as a function should return that function's activation object
     63 
     64     testcases[item++] = new TestCase(   SECTION,
     65                                         "Anonymous Code: var MYFUNC = new Function('return (eval(\"this.toString()\")'); (MYFUNC()).toString()",
     66                                         GLOBAL_OBJECT,
     67                                         eval("var MYFUNC = new Function('return eval(\"this.toString()\")'); (MYFUNC()).toString()") );
     68 
     69     // this and eval( this ) in anonymous code called as a constructor should return the object
     70 
     71     testcases[item++] = new TestCase(   SECTION,
     72                                         "Anonymous Code: var MYFUNC = new Function('this.THIS = this'); ((new MYFUNC()).THIS).toString()",
     73                                         "[object Object]",
     74                                         eval("var MYFUNC = new Function('this.THIS = this'); ((new MYFUNC()).THIS).toString()") );
     75 
     76     testcases[item++] = new TestCase(   SECTION,
     77                                         "Anonymous Code: var MYFUNC = new Function('this.THIS = this'); var FUN1 = new MYFUNC(); FUN1.THIS == FUN1",
     78                                         true,
     79                                         eval("var MYFUNC = new Function('this.THIS = this'); var FUN1 = new MYFUNC(); FUN1.THIS == FUN1") );
     80 
     81     testcases[item++] = new TestCase(   SECTION,
     82                                         "Anonymous Code: var MYFUNC = new Function('this.THIS = eval(\"this\")'); ((new MYFUNC().THIS).toString()",
     83                                         "[object Object]",
     84                                         eval("var MYFUNC = new Function('this.THIS = eval(\"this\")'); ((new MYFUNC()).THIS).toString()") );
     85 
     86     testcases[item++] = new TestCase(   SECTION,
     87                                         "Anonymous Code: var MYFUNC = new Function('this.THIS = eval(\"this\")'); var FUN1 = new MYFUNC(); FUN1.THIS == FUN1",
     88                                         true,
     89                                         eval("var MYFUNC = new Function('this.THIS = eval(\"this\")'); var FUN1 = new MYFUNC(); FUN1.THIS == FUN1") );
     90 
     91     // this and eval(this) in function code called as a function should return the global object.
     92     testcases[item++] = new TestCase(   SECTION,
     93                                         "Function Code:  ReturnThis()",
     94                                         GLOBAL_OBJECT,
     95                                         ReturnThis() );
     96 
     97     testcases[item++] = new TestCase(   SECTION,
     98                                         "Function Code:  ReturnEvalThis()",
     99                                         GLOBAL_OBJECT,
    100                                         ReturnEvalThis() );
    101 
    102     //  this and eval(this) in function code called as a contructor should return the object.
    103     testcases[item++] = new TestCase(   SECTION,
    104                                         "var MYOBJECT = new ReturnThis(); MYOBJECT.toString()",
    105                                         "[object Object]",
    106                                         eval("var MYOBJECT = new ReturnThis(); MYOBJECT.toString()") );
    107 
    108     testcases[item++] = new TestCase(   SECTION,
    109                                         "var MYOBJECT = new ReturnEvalThis(); MYOBJECT.toString()",
    110                                         "[object Object]",
    111                                         eval("var MYOBJECT = new ReturnEvalThis(); MYOBJECT.toString()") );
    112 
    113 
    114 
    115     test();
    116 
    117 function test() {
    118     for ( tc=0; tc < testcases.length; tc++ ) {
    119         testcases[tc].passed = writeTestCaseResult(
    120                             testcases[tc].expect,
    121                             testcases[tc].actual,
    122                             testcases[tc].description +" = "+
    123                             testcases[tc].actual );
    124 
    125         testcases[tc].reason += ( testcases[tc].passed ) ? "" : "wrong value ";
    126     }
    127     stopTest();
    128     return ( testcases );
    129 }
    130 function ReturnThis() {
    131     return this.toString();
    132 }
    133 function ReturnEvalThis() {
    134     return( eval("this.toString()") );
    135 }