core/runtime/src/test/java/org/apache/polygene/regression/qi78/IssueTest.java

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 *  or more contributor license agreements.  See the NOTICE file
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 *  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
 *
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package org.apache.polygene.regression.qi78;

import org.apache.polygene.api.structure.Application;
import org.apache.polygene.api.structure.ApplicationDescriptor;
import org.apache.polygene.api.structure.LayerDescriptor;
import org.apache.polygene.api.util.HierarchicalVisitorAdapter;
import org.apache.polygene.bootstrap.ApplicationAssembly;
import org.apache.polygene.bootstrap.AssemblyException;
import org.apache.polygene.bootstrap.Energy4Java;
import org.apache.polygene.bootstrap.LayerAssembly;
import org.junit.Assert;
import org.junit.Test;

public class IssueTest
{
    @Test
    public void testLayersCanBeCreatedInOrderDifferentFromTheirDependency()
        throws AssemblyException
    {
        Energy4Java polygene = new Energy4Java();

        Application app = polygene.newApplication( factory -> {
            ApplicationAssembly assembly = factory.newApplicationAssembly();

            LayerAssembly domainLayer = assembly.layer( null );
            domainLayer.setName( "Domain" );

            LayerAssembly infrastructureLayer = assembly.layer( null );
            infrastructureLayer.setName( "Infrastructure" );

            domainLayer.uses( infrastructureLayer );

            return assembly;
        } );
        ApplicationDescriptor model = app.descriptor();
        model.accept( new HierarchicalVisitorAdapter<Object, Object, RuntimeException>()
        {
            @Override
            public boolean visitEnter( Object visited )
                throws RuntimeException
            {
                return visited instanceof ApplicationDescriptor;
            }

            @Override
            public boolean visitLeave( Object visited )
                throws RuntimeException
            {
                return visited instanceof LayerDescriptor;
            }

            @Override
            public boolean visit( Object visited )
                throws RuntimeException
            {
                if( visited instanceof LayerDescriptor )
                {
                    ( (LayerDescriptor) visited ).usedLayers().layers().forEach( usedLayerModel -> {
                        Assert.assertNotNull( "Used layer model is null", usedLayerModel );
                    } );
                }

                return false;
            }
        } );
    }
}