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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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  package org.apache.atlas.repository.store.graph.v2;
  
  import org.apache.atlas.AtlasException;
  import org.apache.atlas.BasicTestSetup;
  import org.apache.atlas.RequestContext;
  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.type.AtlasType;
  import org.apache.atlas.utils.TestResourceFileUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.testng.annotations.BeforeClass;
  import org.testng.annotations.Guice;
  import org.testng.annotations.Test;
  
  import java.io.IOException;
  import java.util.Collection;
  
  import static org.testng.Assert.assertEquals;
  import static org.testng.Assert.assertNotNull;
  
  @Guice(modules = TestModules.TestOnlyModule.class)
  public class DifferentialAuditsTest extends BasicTestSetup {
      private static final Logger LOG = LoggerFactory.getLogger(DifferentialAuditsTest.class);
  
      @BeforeClass
      public void setup() throws Exception {
          super.initialize();
  
          setupTestData();
      }
  
      @Test
      public void t1() throws IOException, AtlasException, AtlasBaseException {
          String db01      = TestResourceFileUtils.getJson("entities", "db01");
          String tbl01     = TestResourceFileUtils.getJson("entities", "tbl01");
          String tbl012Col = TestResourceFileUtils.getJson("entities", "tbl01-2cols");
  
          AtlasEntity.AtlasEntitiesWithExtInfo db       = AtlasType.fromJson(db01, AtlasEntity.AtlasEntitiesWithExtInfo.class);
          AtlasEntity.AtlasEntitiesWithExtInfo tbl      = AtlasType.fromJson(tbl01, AtlasEntity.AtlasEntitiesWithExtInfo.class);
          AtlasEntity.AtlasEntitiesWithExtInfo tbl2Cols = AtlasType.fromJson(tbl012Col, AtlasEntity.AtlasEntitiesWithExtInfo.class);
  
          ((AtlasEntityStoreV2) entityStore).setStoreDifferentialAudits(true);
  
          EntityMutationResponse response = entityStore.createOrUpdate(new AtlasEntityStream(db), false);
  
          assertNotNull(response);
  
          response = entityStore.createOrUpdate(new AtlasEntityStream(tbl2Cols), false);
  
          Collection<AtlasEntity> diffEntities = RequestContext.get().getDifferentialEntities();
  
          assertNotNull(response);
          assertEquals(diffEntities.size(), 0);
  
          RequestContext.get().clearCache();
  
          response = entityStore.createOrUpdate(new AtlasEntityStream(tbl), false);
  
          assertNotNull(response);
  
          diffEntities = RequestContext.get().getDifferentialEntities();
  
          assertEquals(diffEntities.size(), 1);
  
          RequestContext.get().clearCache();
  
          response = entityStore.createOrUpdate(new AtlasEntityStream(tbl), false);
  
          assertNotNull(response);
  
          diffEntities = RequestContext.get().getDifferentialEntities();
  
          assertEquals(diffEntities.size(), 0);
      }
  }
  