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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
   * 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
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   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * Unless required by applicable law or agreed to in writing, software
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   * See the License for the specific language governing permissions and
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  package org.apache.atlas.repository.store.graph.v2;
  
  import org.apache.atlas.BasicTestSetup;
  import org.apache.atlas.TestModules;
  import org.apache.atlas.exception.AtlasBaseException;
  import org.apache.atlas.model.instance.AtlasEntity;
  import org.apache.atlas.model.instance.EntityMutationResponse;
  import org.apache.atlas.repository.graphdb.AtlasGraph;
  import org.apache.atlas.repository.store.graph.EntityCorrelationStore;
  import org.apache.atlas.type.AtlasType;
  import org.apache.atlas.utils.TestResourceFileUtils;
  import org.testng.annotations.BeforeClass;
  import org.testng.annotations.Guice;
  import org.testng.annotations.Test;
  
  import javax.inject.Inject;
  
  import java.io.IOException;
  
  import static org.testng.Assert.assertEquals;
  import static org.testng.Assert.assertNotNull;
  import static org.testng.Assert.assertNull;
  
  @Guice(modules = TestModules.TestOnlyModule.class)
  public class EntityCorrelationStoreTest extends BasicTestSetup {
      @Inject
      AtlasGraph graph;
  
      @BeforeClass
      public void setup() throws Exception {
          super.initialize();
  
          setupTestData();
      }
  
      @Test
      public void verify() throws IOException, AtlasBaseException {
          final String                 nonExistentQName       = "db01@cm";
          final String                 db01QName              = "db01x@cm";
          final EntityCorrelationStore entityCorrelationStore = new EntityCorrelationStore();
  
          String db01 = TestResourceFileUtils.getJson("entities", "db01");
  
          AtlasEntity.AtlasEntitiesWithExtInfo db       = AtlasType.fromJson(db01, AtlasEntity.AtlasEntitiesWithExtInfo.class);
          EntityMutationResponse               response = entityStore.createOrUpdate(new AtlasEntityStream(db), false);
  
          String dbGuid = response.getFirstEntityCreated().getGuid();
          entityStore.deleteById(dbGuid);
  
          entityCorrelationStore.add(dbGuid, 2L);
          graph.commit();
  
          String guid = entityCorrelationStore.findCorrelatedGuid(nonExistentQName, 1);
          assertNull(guid);
  
          String fetchedGuid = entityCorrelationStore.findCorrelatedGuid(db01QName, 1L);
          assertNotNull(fetchedGuid);
          assertEquals(fetchedGuid, dbGuid);
  
          guid = entityCorrelationStore.findCorrelatedGuid(db01QName, 2L);
          assertNull(guid);
      }
  }
  