package org.apache.maven.model.merge;


/*
 * 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.
 */

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;

import java.util.Collections;

import org.apache.maven.model.Model;
import org.apache.maven.model.Prerequisites;
import org.apache.maven.model.Profile;
import org.junit.Test;

public class MavenModelMergerTest
{
    private MavenModelMerger modelMerger = new MavenModelMerger();

    // Prerequisites are neither inherited nor injected
    @Test
    public void testMergeModel_Prerequisites()
    {
        Model parent = new Model();
        parent.setPrerequisites( new Prerequisites() );
        Model model = new Model();
        modelMerger.mergeModel_Prerequisites( model, parent, true, null );
        assertNull( model.getPrerequisites() );
        
        Prerequisites modelPrerequisites = new Prerequisites();
        modelPrerequisites.setMaven( "3.0" );
        model.setPrerequisites( modelPrerequisites );
        modelMerger.mergeModel_Prerequisites( model, parent, true, null );
        assertEquals( modelPrerequisites, model.getPrerequisites() );
    }

    // Profiles are neither inherited nor injected
    @Test
    public void testMergeModel_Profiles()
    {
        Model parent = new Model();
        parent.setProfiles( Collections.singletonList( new Profile() ) );;
        Model model = new Model();
        modelMerger.mergeModel_Profiles( model, parent, true, null );
        assertEquals( 0, model.getProfiles().size() );
        
        Profile modelProfile = new Profile();
        modelProfile.setId( "MODEL" );
        model.setProfiles( Collections.singletonList( modelProfile ) );
        modelMerger.mergeModel_Prerequisites( model, parent, true, null );
        assertEquals( Collections.singletonList( modelProfile ), model.getProfiles() );
    }

}

Add unittests for elements of Model which are neither inherited nor injected. Ignoring artifactId and modelVersion, these are required elements.
Add unittests for elements of Model which are neither inherited nor
injected.
Ignoring artifactId and modelVersion, these are required elements.