defaultfacthandlefactorytest.java

jboss规则引擎

package org.drools.reteoo;

/*
 * Copyright 2005 JBoss Inc
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import org.drools.common.DefaultFactHandle;

import junit.framework.TestCase;

public class DefaultFactHandleFactoryTest extends TestCase {

    /*
     * Class under test for FactHandle newFactHandle()
     */
    public void testNewFactHandle() {
        final ReteooFactHandleFactory factory = new ReteooFactHandleFactory();
        DefaultFactHandle handle = (DefaultFactHandle) factory.newFactHandle( "cheese" );
        assertEquals( 0,
                      handle.getId() );
        assertEquals( 0,
                      handle.getRecency() );

        // issue  new handle
        handle = (DefaultFactHandle) factory.newFactHandle( "cheese" );
        assertEquals( 1,
                      handle.getId() );
        assertEquals( 1,
                      handle.getRecency() );

        // issue  new handle, under a different reference so we  can destroy later        
        final DefaultFactHandle handle2 = (DefaultFactHandle) factory.newFactHandle( "cheese" );
        assertEquals( 2,
                      handle2.getId() );
        assertEquals( 2,
                      handle2.getRecency() );

        // Check recency increasion works
        factory.increaseFactHandleRecency( handle );
        assertEquals( 3,
                      handle.getRecency() );

        // issue new handle and make sure  recency is still inline
        handle = (DefaultFactHandle) factory.newFactHandle( "cheese" );
        assertEquals( 3,
                      handle.getId() );
        assertEquals( 4,
                      handle.getRecency() );

        // destroy handle
        factory.destroyFactHandle( handle2 );

        // issue  new  fact handle and  make sure it  recycled the  id=2
        handle = (DefaultFactHandle) factory.newFactHandle( "cheese" );
        assertEquals( 2,
                      handle.getId() );
        assertEquals( 5,
                      handle.getRecency() );

        // issue new  handle  making  sure it correctly resumes  ids  and recency
        handle = (DefaultFactHandle) factory.newFactHandle( "cheese" );
        assertEquals( 4,
                      handle.getId() );
        assertEquals( 6,
                      handle.getRecency() );

    }

}