/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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. 
 *  
 */
package org.apache.directory.server.core.authz.support;


import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import junit.framework.Assert;
import junit.framework.TestCase;

import org.apache.directory.server.core.authz.support.HighestPrecedenceFilter;
import org.apache.directory.shared.ldap.aci.ACITuple;
import org.apache.directory.shared.ldap.aci.AuthenticationLevel;


/**
 * Tests {@link HighestPrecedenceFilter}.
 *
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 * @version $Rev$, $Date$
 *
 */
public class HighestPrecedenceFilterTest extends TestCase
{
    private static final Collection EMPTY_COLLECTION = Collections.unmodifiableCollection( new ArrayList() );
    private static final Set EMPTY_SET = Collections.unmodifiableSet( new HashSet() );


    public void testZeroTuple() throws Exception
    {
        HighestPrecedenceFilter filter = new HighestPrecedenceFilter();
        Assert.assertEquals( 0, filter.filter( EMPTY_COLLECTION, null, null, null, null, null, null, null, null, null,
            null, null ).size() );
    }


    public void testOneTuple() throws Exception
    {
        HighestPrecedenceFilter filter = new HighestPrecedenceFilter();
        Collection tuples = new ArrayList();
        tuples.add( new ACITuple( EMPTY_COLLECTION, AuthenticationLevel.NONE, EMPTY_COLLECTION, EMPTY_SET, true, 10 ) );
        tuples = Collections.unmodifiableCollection( tuples );
        Assert.assertEquals( tuples, filter.filter( tuples, null, null, null, null, null, null, null, null, null, null,
            null ) );
    }


    public void testMoreThanOneTuples() throws Exception
    {
        final int MAX_PRECEDENCE = 10;
        HighestPrecedenceFilter filter = new HighestPrecedenceFilter();
        Collection tuples = new ArrayList();
        tuples.add( new ACITuple( EMPTY_COLLECTION, AuthenticationLevel.NONE, EMPTY_COLLECTION, EMPTY_SET, true,
            MAX_PRECEDENCE ) );
        tuples.add( new ACITuple( EMPTY_COLLECTION, AuthenticationLevel.NONE, EMPTY_COLLECTION, EMPTY_SET, true,
            MAX_PRECEDENCE / 2 ) );
        tuples.add( new ACITuple( EMPTY_COLLECTION, AuthenticationLevel.NONE, EMPTY_COLLECTION, EMPTY_SET, true,
            MAX_PRECEDENCE ) );
        tuples.add( new ACITuple( EMPTY_COLLECTION, AuthenticationLevel.NONE, EMPTY_COLLECTION, EMPTY_SET, true,
            MAX_PRECEDENCE / 3 ) );

        tuples = filter.filter( tuples, null, null, null, null, null, null, null, null, null, null, null );

        for ( Iterator i = tuples.iterator(); i.hasNext(); )
        {
            ACITuple tuple = ( ACITuple ) i.next();
            Assert.assertEquals( MAX_PRECEDENCE, tuple.getPrecedence() );
        }
    }
}