74 lines
2.3 KiB
JavaScript
74 lines
2.3 KiB
JavaScript
/**
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* Tests class builder visibility implementation
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*
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* See also: test-class-visibility.js
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*
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* Copyright (C) 2010 Mike Gerwitz
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*
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* This file is part of ease.js.
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*
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* ease.js is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser 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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* @author Mike Gerwitz
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* @package test
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*/
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var common = require( './common' ),
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assert = require( 'assert' ),
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util = common.require( 'util' ),
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builder = common.require( 'class_builder' )
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;
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/**
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* As discussed in GH#15, there's a bit of an issue when passing around 'this'
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* from within a method. For example, passing 'this' as an argument or invoking
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* a method with it as the context will effectively defeat encapsulation.
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* Unfortunately, there's really no way around that. Maybe a more elegant
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* solution will arise in the future. For now, not likely.
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*
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* We need to provide a means to reference the actual instance. __inst is that
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* solution.
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*/
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( function testSelfPropertyReferencesInstanceRatherThanPropObj()
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{
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var result = null
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ref = null,
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foo = builder.build( {
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'public __construct': function()
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{
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// rather than returning, assign to external var so that we can
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// rest assured that the return value wasn't manipulated
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result = this.__inst;
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ref = this;
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}
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} )();
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assert.deepEqual( result, foo,
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"this.__inst returns reference to actual instance"
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);
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// the property should be read-only
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if ( util.definePropertyFallback() === false )
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{
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assert.equal(
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Object.getOwnPropertyDescriptor( ref, '__inst' ).writable,
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false,
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"this.__inst is not writable"
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);
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}
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} )();
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