easejs/test/VisibilityObjectFactoryFactoryTest.js

/**
 * Tests factory for visibility object factory
 *
 *  Copyright (C) 2011, 2012, 2013 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/>.
 */

require( 'common' ).testCase(
{
    caseSetUp: function()
    {
        this.sut = this.require( 'VisibilityObjectFactoryFactory' );

        this.VisibilityObjectFactory =
            this.require( 'VisibilityObjectFactory' );

        this.FallbackVisibilityObjectFactory =
            this.require( 'FallbackVisibilityObjectFactory' );

        this.util = this.require( 'util' );
    },


    /**
     * By default, if supported by our environment, we should use the standard
     * factory to provide proper visibility support.
     */
    'Returns standard factory if not falling back': function()
    {
        // don't bother with the test if we don't support the standard visibility
        // object
        if ( this.util.definePropertyFallback() )
        {
            return;
        }

        this.assertOk(
            ( this.sut.fromEnvironment()
                instanceof this.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.
     */
    'Returns fallback factory if falling back': function()
    {
        var old = this.util.definePropertyFallback();

        // force fallback
        this.util.definePropertyFallback( true );

        this.assertOk(
            ( this.sut.fromEnvironment()
                instanceof this.FallbackVisibilityObjectFactory
            ),
            "Creates fallback VisibilityObjectFactory if falling back"
        );

        // restore fallback
        this.util.definePropertyFallback( old );
    },
} );