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easejs/test/ClassBuilder/VisibilityTest.js

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JavaScript

/**
* Tests class builder visibility implementation
*
* Copyright (C) 2011, 2012, 2013, 2014 Free Software Foundation, Inc.
*
* This file is part of GNU ease.js.
*
* ease.js is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* See also: Class/VisibilityTest
*/
require( 'common' ).testCase(
{
caseSetUp: function()
{
this.Sut = this.require( 'ClassBuilder' );
this.MethodWrapperFactory = this.require( 'MethodWrapperFactory' );
this.wrappers = this.require( 'MethodWrappers' ).standard;
this.util = this.require( 'util' );
},
setUp: function()
{
// XXX: get rid of this disgusting mess; we're mid-refactor and all
// these dependencies should not be necessary for testing
this.builder = this.Sut(
this.require( 'warn' ).DismissiveHandler(),
this.require( '/MemberBuilder' )(
this.MethodWrapperFactory( this.wrappers.wrapNew ),
this.MethodWrapperFactory( this.wrappers.wrapOverride ),
this.MethodWrapperFactory( this.wrappers.wrapProxy ),
this.getMock( 'MemberBuilderValidator' )
),
this.require( '/VisibilityObjectFactoryFactory' ).fromEnvironment()
);
},
/**
* As discussed in GH#15, there's a bit of an issue when passing around
* 'this' from within a method. For example, passing 'this' as an argument
* or invoking a method with it as the context will effectively defeat
* encapsulation. Unfortunately, there's really no way around that. Maybe a
* more elegant solution will arise in the future. For now, not likely.
*
* We need to provide a means to reference the actual instance. __inst is
* that solution.
*/
'Self property references instance rather than property object': function()
{
var result = null,
ref = null,
foo = this.builder.build( {
'public __construct': function()
{
// rather than returning, assign to external var so that we can
// rest assured that the return value wasn't manipulated
result = this.__inst;
ref = this;
}
} )();
this.assertDeepEqual( result, foo,
"this.__inst returns reference to actual instance"
);
// the property should be read-only
if ( this.util.definePropertyFallback() === false )
{
this.assertEqual(
Object.getOwnPropertyDescriptor( ref, '__inst' ).writable,
false,
"this.__inst is not writable"
);
}
},
} );