michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: 
michael@0: /**
michael@0:    File Name:          11.6.1-2.js
michael@0:    ECMA Section:       11.6.1 The addition operator ( + )
michael@0:    Description:
michael@0: 
michael@0:    The addition operator either performs string concatenation or numeric
michael@0:    addition.
michael@0: 
michael@0:    The production AdditiveExpression : AdditiveExpression + MultiplicativeExpression
michael@0:    is evaluated as follows:
michael@0: 
michael@0:    1.  Evaluate AdditiveExpression.
michael@0:    2.  Call GetValue(Result(1)).
michael@0:    3.  Evaluate MultiplicativeExpression.
michael@0:    4.  Call GetValue(Result(3)).
michael@0:    5.  Call ToPrimitive(Result(2)).
michael@0:    6.  Call ToPrimitive(Result(4)).
michael@0:    7.  If Type(Result(5)) is String or Type(Result(6)) is String, go to step 12.
michael@0:    (Note that this step differs from step 3 in the algorithm for comparison
michael@0:    for the relational operators in using or instead of and.)
michael@0:    8.  Call ToNumber(Result(5)).
michael@0:    9.  Call ToNumber(Result(6)).
michael@0:    10. Apply the addition operation to Result(8) and Result(9). See the discussion below (11.6.3).
michael@0:    11. Return Result(10).
michael@0:    12. Call ToString(Result(5)).
michael@0:    13. Call ToString(Result(6)).
michael@0:    14. Concatenate Result(12) followed by Result(13).
michael@0:    15. Return Result(14).
michael@0: 
michael@0:    Note that no hint is provided in the calls to ToPrimitive in steps 5 and 6.
michael@0:    All native ECMAScript objects except Date objects handle the absence of a
michael@0:    hint as if the hint Number were given; Date objects handle the absence of a
michael@0:    hint as if the hint String were given. Host objects may handle the absence
michael@0:    of a hint in some other manner.
michael@0: 
michael@0:    This test does only covers cases where the Additive or Mulplicative expression
michael@0:    ToPrimitive is a string.
michael@0: 
michael@0:    Author:             christine@netscape.com
michael@0:    Date:               12 november 1997
michael@0: */
michael@0: var SECTION = "11.6.1-2";
michael@0: var VERSION = "ECMA_1";
michael@0: startTest();
michael@0: 
michael@0: writeHeaderToLog( SECTION + " The Addition operator ( + )");
michael@0: 
michael@0: // tests for boolean primitive, boolean object, Object object, a "MyObject" whose value is
michael@0: // a boolean primitive and a boolean object.
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0:                 "var EXP_1 = 'string'; var EXP_2 = false; EXP_1 + EXP_2",
michael@0:                 "stringfalse",
michael@0:                 eval("var EXP_1 = 'string'; var EXP_2 = false; EXP_1 + EXP_2") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0:                 "var EXP_1 = true; var EXP_2 = 'string'; EXP_1 + EXP_2",
michael@0:                 "truestring",
michael@0:                 eval("var EXP_1 = true; var EXP_2 = 'string'; EXP_1 + EXP_2") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0:                 "var EXP_1 = new Boolean(true); var EXP_2 = new String('string'); EXP_1 + EXP_2",
michael@0:                 "truestring",
michael@0:                 eval("var EXP_1 = new Boolean(true); var EXP_2 = new String('string'); EXP_1 + EXP_2") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0:                 "var EXP_1 = new Object(true); var EXP_2 = new Object('string'); EXP_1 + EXP_2",
michael@0:                 "truestring",
michael@0:                 eval("var EXP_1 = new Object(true); var EXP_2 = new Object('string'); EXP_1 + EXP_2") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0:                 "var EXP_1 = new Object(new String('string')); var EXP_2 = new Object(new Boolean(false)); EXP_1 + EXP_2",
michael@0:                 "stringfalse",
michael@0:                 eval("var EXP_1 = new Object(new String('string')); var EXP_2 = new Object(new Boolean(false)); EXP_1 + EXP_2") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0:                 "var EXP_1 = new MyObject(true); var EXP_2 = new MyObject('string'); EXP_1 + EXP_2",
michael@0:                 "truestring",
michael@0:                 eval("var EXP_1 = new MyObject(true); var EXP_2 = new MyObject('string'); EXP_1 + EXP_2") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0:                 "var EXP_1 = new MyObject(new String('string')); var EXP_2 = new MyObject(new Boolean(false)); EXP_1 + EXP_2",
michael@0:                 "[object Object][object Object]",
michael@0:                 eval("var EXP_1 = new MyObject(new String('string')); var EXP_2 = new MyObject(new Boolean(false)); EXP_1 + EXP_2") );
michael@0: 
michael@0: // tests for number primitive, number object, Object object, a "MyObject" whose value is
michael@0: // a number primitive and a number object.
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0:                 "var EXP_1 = 100; var EXP_2 = 'string'; EXP_1 + EXP_2",
michael@0:                 "100string",
michael@0:                 eval("var EXP_1 = 100; var EXP_2 = 'string'; EXP_1 + EXP_2") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0:                 "var EXP_1 = new String('string'); var EXP_2 = new Number(-1); EXP_1 + EXP_2",
michael@0:                 "string-1",
michael@0:                 eval("var EXP_1 = new String('string'); var EXP_2 = new Number(-1); EXP_1 + EXP_2") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0:                 "var EXP_1 = new Object(100); var EXP_2 = new Object('string'); EXP_1 + EXP_2",
michael@0:                 "100string",
michael@0:                 eval("var EXP_1 = new Object(100); var EXP_2 = new Object('string'); EXP_1 + EXP_2") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0:                 "var EXP_1 = new Object(new String('string')); var EXP_2 = new Object(new Number(-1)); EXP_1 + EXP_2",
michael@0:                 "string-1",
michael@0:                 eval("var EXP_1 = new Object(new String('string')); var EXP_2 = new Object(new Number(-1)); EXP_1 + EXP_2") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0:                 "var EXP_1 = new MyObject(100); var EXP_2 = new MyObject('string'); EXP_1 + EXP_2",
michael@0:                 "100string",
michael@0:                 eval("var EXP_1 = new MyObject(100); var EXP_2 = new MyObject('string'); EXP_1 + EXP_2") );
michael@0: 
michael@0: new TestCase(   SECTION,
michael@0:                 "var EXP_1 = new MyObject(new String('string')); var EXP_2 = new MyObject(new Number(-1)); EXP_1 + EXP_2",
michael@0:                 "[object Object][object Object]",
michael@0:                 eval("var EXP_1 = new MyObject(new String('string')); var EXP_2 = new MyObject(new Number(-1)); EXP_1 + EXP_2") );
michael@0: 
michael@0: test();
michael@0: 
michael@0: function MyObject( value ) {
michael@0:   this.valueOf = new Function( "return this.value" );
michael@0:   this.value = value;
michael@0: }