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A collection of utility classes to ease testing of the repository system.
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package org.eclipse.aether.internal.test.util;

/*
 * 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 java.util.List;

import org.eclipse.aether.DefaultRepositorySystemSession;
import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.artifact.Artifact;
import org.eclipse.aether.collection.DependencyCollectionContext;
import org.eclipse.aether.collection.DependencyGraphTransformationContext;
import org.eclipse.aether.collection.VersionFilter;
import org.eclipse.aether.graph.Dependency;
import org.eclipse.aether.resolution.VersionRangeResult;

/**
 * Utility methods to help unit testing.
 */
public class TestUtils
{

    private TestUtils()
    {
        // hide constructor
    }

    /**
     * Creates a new repository session whose local repository manager is initialized with an instance of
     * {@link TestLocalRepositoryManager}.
     */
    public static DefaultRepositorySystemSession newSession()
    {
        DefaultRepositorySystemSession session = new DefaultRepositorySystemSession();
        session.setLocalRepositoryManager( new TestLocalRepositoryManager() );
        return session;
    }

    /**
     * Creates a new dependency collection context.
     */
    public static DependencyCollectionContext newCollectionContext( RepositorySystemSession session,
                                                                    Dependency dependency,
                                                                    List managedDependencies )
    {
        return new TestDependencyCollectionContext( session, null, dependency, managedDependencies );
    }

    /**
     * Creates a new dependency collection context.
     */
    public static DependencyCollectionContext newCollectionContext( RepositorySystemSession session, Artifact artifact,
                                                                    Dependency dependency,
                                                                    List managedDependencies )
    {
        return new TestDependencyCollectionContext( session, artifact, dependency, managedDependencies );
    }

    /**
     * Creates a new dependency graph transformation context.
     */
    public static DependencyGraphTransformationContext newTransformationContext( RepositorySystemSession session )
    {
        return new TestDependencyGraphTransformationContext( session );
    }

    /**
     * Creates a new version filter context from the specified session and version range result.
     */
    public static VersionFilter.VersionFilterContext newVersionFilterContext( RepositorySystemSession session,
                                                                              VersionRangeResult rangeResult )
    {
        return new TestVersionFilterContext( session, rangeResult );
    }

}