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  package org.apache.cayenne.access;
  
  import java.util.List;
  
  import org.apache.cayenne.ObjectContext;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.query.ObjectSelect;
  import org.apache.cayenne.query.QueryCacheStrategy;
  import org.apache.cayenne.runtime.CayenneRuntime;
  import org.apache.cayenne.testdo.testmap.Artist;
  import org.apache.cayenne.unit.di.runtime.CayenneProjects;
  import org.apache.cayenne.unit.di.runtime.RuntimeCase;
  import org.apache.cayenne.unit.di.runtime.UseCayenneRuntime;
  import org.junit.Test;
  
  import static org.junit.Assert.assertNull;
  import static org.junit.Assert.assertSame;
  
  @UseCayenneRuntime(CayenneProjects.TESTMAP_PROJECT)
  public class NestedDataContextLocalCacheIT extends RuntimeCase {
  
      @Inject
      protected CayenneRuntime runtime;
  
      @Inject
      private DataContext context;
  
      @Test
      public void testLocalCacheStaysLocal() {
  
          ObjectSelect<Artist> query = ObjectSelect.query(Artist.class)
                  .cacheStrategy(QueryCacheStrategy.LOCAL_CACHE);
  
          ObjectContext child1 = runtime.newContext(context);
  
          assertNull(((DataContext) child1).getQueryCache().get(
                  query.getMetaData(child1.getEntityResolver())));
  
          assertNull(context.getQueryCache().get(
                  query.getMetaData(context.getEntityResolver())));
  
          List<?> results = child1.performQuery(query);
          assertSame(results, ((DataContext) child1).getQueryCache().get(
                  query.getMetaData(child1.getEntityResolver())));
  
          assertNull(context.getQueryCache().get(
                  query.getMetaData(context.getEntityResolver())));
      }
  }
  