/**
 * 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 );
} )();