88 lines
2.6 KiB
JavaScript
88 lines
2.6 KiB
JavaScript
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/**
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* Tests safety of class instances
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*
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* Copyright (C) 2010, 2011, 2013, 2014 Mike Gerwitz
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*
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* This file is part of GNU ease.js.
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*
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* ease.js is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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require( 'common' ).testCase(
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{
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caseSetUp: function()
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{
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this.Sut = this.require( 'class' );
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},
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/**
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* Ensure that we're not getting/setting values of the prototype, which
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* would have disasterous implications (=== can also be used to test for
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* references, but this test demonstrates the functionality that we're
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* looking to ensure)
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*/
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'Multiple instances of same class do not share array references':
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function()
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{
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var C = this.Sut.extend( { arr: [] } ),
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obj1 = new C(),
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obj2 = new C();
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obj1.arr.push( 'one' );
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obj2.arr.push( 'two' );
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// if the arrays are distinct, then each will have only one element
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this.assertEqual( obj1.arr[ 0 ], 'one' );
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this.assertEqual( obj2.arr[ 0 ], 'two' );
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this.assertEqual( obj1.arr.length, 1 );
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this.assertEqual( obj2.arr.length, 1 );
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},
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/**
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* Same concept as above, but with objects instead of arrays.
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*/
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'Multiple instances of same class do not share object references':
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function()
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{
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var C = this.Sut.extend( { obj: {} } ),
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obj1 = new C(),
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obj2 = new C();
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obj1.obj.a = true;
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obj2.obj.b = true;
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this.assertEqual( obj1.obj.a, true );
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this.assertEqual( obj1.obj.b, undefined );
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this.assertEqual( obj2.obj.a, undefined );
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this.assertEqual( obj2.obj.b, true );
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},
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/**
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* Ensure that the above checks extend to subtypes.
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*/
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'Instances of subtypes do not share property references': function()
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{
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var C2 = this.Sut.extend( { arr: [], obj: {} } ).extend( {} ),
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obj1 = new C2(),
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obj2 = new C2();
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this.assertNotEqual( obj1.arr !== obj2.arr );
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this.assertNotEqual( obj1.obj !== obj2.obj );
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},
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} );
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