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    * 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
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    * 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.
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  package org.apache.maven.index.updater;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  
  import org.apache.lucene.search.IndexSearcher;
  import org.apache.lucene.search.Query;
  import org.apache.maven.index.AbstractIndexCreatorHelper;
  import org.apache.maven.index.ArtifactContext;
  import org.apache.maven.index.ArtifactInfo;
  import org.apache.maven.index.IteratorSearchRequest;
  import org.apache.maven.index.IteratorSearchResponse;
  import org.apache.maven.index.MAVEN;
  import org.apache.maven.index.NexusIndexer;
  import org.apache.maven.index.SearchType;
  import org.apache.maven.index.artifact.Gav;
  import org.apache.maven.index.context.IndexingContext;
  import org.apache.maven.index.packer.IndexPacker;
  import org.apache.maven.index.packer.IndexPackingRequest;
  import org.codehaus.plexus.util.FileUtils;
  
  import static org.junit.Assert.assertEquals;
  
  public abstract class AbstractIndexUpdaterTest extends AbstractIndexCreatorHelper {
      File testBasedir;
  
      File repoDir;
  
      File indexDir;
  
      String repositoryId = "test";
  
      String repositoryUrl = "http://repo1.maven.org/maven2/";
  
      NexusIndexer indexer;
  
      IndexUpdater updater;
  
      IndexPacker packer;
  
      IndexingContext context;
  
      @Override
      public void setUp() throws Exception {
          super.setUp();
  
          testBasedir = new File(getBasedir(), "/target/indexUpdater");
          testBasedir.mkdirs();
  
          repoDir = new File(getBasedir(), "/target/indexUpdaterRepoDir");
          repoDir.mkdirs();
  
          indexDir = super.getDirectory("indexerUpdater");
          indexDir.mkdirs();
  
          indexer = lookup(NexusIndexer.class);
  
          updater = lookup(IndexUpdater.class);
  
          packer = lookup(IndexPacker.class);
  
          context = indexer.addIndexingContext(
                  repositoryId, repositoryId, repoDir, indexDir, repositoryUrl, null, MIN_CREATORS);
      }
  
      @Override
      public void tearDown() throws Exception {
          super.tearDown();
  
          // this one closes it too
          indexer.removeIndexingContext(context, true);
  
          FileUtils.forceDelete(testBasedir);
  
          FileUtils.forceDelete(repoDir);
  
          FileUtils.forceDelete(indexDir);
      }
  
      protected ArtifactContext createArtifactContext(
             String repositoryId, String groupId, String artifactId, String version, String classifier) {
         String path = createPath(groupId, artifactId, version, classifier);
         File pomFile = new File(path + ".pom");
         File artifact = new File(path + ".jar");
         File metadata = null;
         ArtifactInfo artifactInfo = new ArtifactInfo(repositoryId, groupId, artifactId, version, classifier, "jar");
         Gav gav = new Gav(
                 groupId,
                 artifactId,
                 version,
                 classifier,
                 "jar",
                 null,
                 null,
                 artifact.getName(),
                 false,
                 null,
                 false,
                 null);
         return new ArtifactContext(pomFile, artifact, metadata, artifactInfo, gav);
     }
 
     protected String createPath(String groupId, String artifactId, String version, String classifier) {
         return "/" + groupId + "/" + artifactId + "/" + version + "/" + artifactId + "-" + version
                 + (classifier == null ? "" : "-" + classifier);
     }
 
     protected void packIndex(File targetDir, IndexingContext context) throws IllegalArgumentException, IOException {
         final IndexSearcher indexSearcher = context.acquireIndexSearcher();
         try {
             IndexPackingRequest request = new IndexPackingRequest(context, indexSearcher.getIndexReader(), targetDir);
             request.setUseTargetProperties(true);
             packer.packIndex(request);
         } finally {
             context.releaseIndexSearcher(indexSearcher);
         }
     }
 
     protected void searchFor(String groupId, int expected, IndexingContext context) throws IOException, Exception {
         Query q = indexer.constructQuery(MAVEN.GROUP_ID, groupId, SearchType.EXACT);
 
         IteratorSearchRequest req;
 
         if (context != null) {
             req = new IteratorSearchRequest(q, context);
         } else {
             req = new IteratorSearchRequest(q);
         }
 
         IteratorSearchResponse response = indexer.searchIterator(req);
 
         ArrayList<ArtifactInfo> ais = new ArrayList<>(response.getTotalHits());
 
         for (ArtifactInfo ai : response) {
             ais.add(ai);
         }
 
         assertEquals(ais.toString(), expected, ais.size());
     }
 }