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easejs/test/test-class_builder-const.js

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2011-05-19 07:54:51 -04:00
/**
* Tests const keyword
*
* Copyright (C) 2010 Mike Gerwitz
*
* This file is part of ease.js.
*
* ease.js is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @author Mike Gerwitz
* @package test
*/
var common = require( './common' ),
// XXX: get rid of this disgusting mess; we're mid-refactor and all these
// dependencies should not be necessary for testing
ClassBuilder = common.require( '/ClassBuilder' ),
MethodWrapperFactory = common.require( '/MethodWrapperFactory' ),
wrappers = common.require( '/MethodWrappers' ).standard
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;
require( 'common' ).testCase(
{
setUp: function()
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{
this.builder = ClassBuilder(
this.require( '/MemberBuilder' )(
MethodWrapperFactory( wrappers.wrapNew ),
MethodWrapperFactory( wrappers.wrapOverride ),
this.getMock( 'MemberBuilderValidator' )
),
this.require( '/VisibilityObjectFactoryFactory' ).fromEnvironment()
)
},
/** The const keyword should result in a static property. The rationale for
* this is that, if a value is constant, then instances do not make sense.
*/
'const keyword declares properties as static': function()
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{
var val = 'baz',
Foo = this.builder.build(
{
'const foo': val,
} )
;
this.assertEqual( val, Foo.$('foo'),
"Const keyword should declare properties as static"
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);
},
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/**
* As the name implies, constant properties should not be writable.
*/
'const keyword creates immutable property': function()
{
try
{
// this should fail (trying to alter const prop foo)
this.builder.build( { 'const foo': 'bar' } ).$( 'foo', 'baz' );
}
catch ( e )
{
this.assertOk(
e.message.search( 'foo' ) !== -1,
"Const modification error should contain name of property"
);
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return;
}
this.fail( "Constant properties should not be writable" );
},
/**
* Unlike other languages such as PHP, the const keyword can have different
* levels of visibility.
*/
'Access modifiers are permitted with const keyword': function()
{
var protval = 'bar',
privval = 'baz',
Foo = this.builder.build(
{
'protected const prot': protval,
'private const priv': privval,
'public static getProt': function()
{
return this.$('prot');
},
'public static getPriv': function()
{
return this.$('priv');
},
} ),
// be sure to override each method to ensure we're checking
// references on the subtype, *not* the parent type
SubFoo = this.builder.build( Foo,
{
'public static getProt': function()
{
return this.$('prot');
},
'public static getPriv': function()
{
return this.$('priv');
},
} )
;
this.assertEqual( Foo.$('prot'), undefined,
"Protected constants are not available publicly"
);
this.assertEqual( Foo.$('priv'), undefined,
"Private constants are not available publicly"
);
this.assertEqual( Foo.getProt(), protval,
"Protected constants are available internally"
);
this.assertEqual( Foo.getPriv(), privval,
"Private constants are available internally"
);
this.assertEqual( SubFoo.getProt(), protval,
"Protected constants are available to subtypes internally"
);
this.assertEqual( SubFoo.getPriv(), undefined,
"Private constants are NOT available to subtypes internally"
);
},
} );