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easejs/test/VisibilityObjectFactoryFact...

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JavaScript

/**
* Tests factory for visibility object factory
*
* 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
*/
var common = require( './common' ),
assert = require( 'assert' ),
util = common.require( 'util' ),
sut = common.require( 'VisibilityObjectFactoryFactory' ),
VisibilityObjectFactory = common.require( 'VisibilityObjectFactory' ),
FallbackVisibilityObjectFactory =
common.require( 'FallbackVisibilityObjectFactory' )
;
/**
* By default, if supported by our environment, we should use the standard
* factory to provide proper visibility support.
*/
( function testReturnsStandardIfNotFallingBack()
{
// don't bother with the test if we don't support the standard visibility
// object
if ( util.definePropertyFallback() )
{
return;
}
assert.ok(
( sut.fromEnvironment() instanceof VisibilityObjectFactory ),
"Creates standard VisibilityObjectFactory if supported"
);
} )();
/**
* If not supported by our environment, we should be permitted to fall back to a
* working implementation that sacrifices visibility support.
*/
( function testReturnsFallbackFactoryIfFallingBack()
{
var old = util.definePropertyFallback();
// force fallback
util.definePropertyFallback( true );
assert.ok(
( sut.fromEnvironment() instanceof FallbackVisibilityObjectFactory ),
"Creates fallback VisibilityObjectFactory if falling back"
);
// restore fallback
util.definePropertyFallback( old );
} )();