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  package org.apache.cayenne.access.event;
  
  import org.apache.cayenne.DataRow;
  import org.apache.cayenne.ObjectId;
  import org.junit.Test;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Map;
  
  import static org.junit.Assert.assertSame;
  
  public class SnapshotEventTest {
  
      @Test
      public void testRootEvent() {
          Object source = new Object();
          Collection<ObjectId> deleted = new ArrayList<>();
          Collection<ObjectId> invalidated = new ArrayList<>();
          Map<ObjectId, DataRow> modified = new HashMap<>();
          Collection<ObjectId> related = new ArrayList<>();
  
          SnapshotEvent event = new SnapshotEvent(
                  source,
                  source,
                  modified,
                  deleted,
                  invalidated,
                  related);
          assertSame(source, event.getSource());
          assertSame(source, event.getPostedBy());
          assertSame(deleted, event.getDeletedIds());
          assertSame(invalidated, event.getInvalidatedIds());
          assertSame(modified, event.getModifiedDiffs());
          assertSame(related, event.getIndirectlyModifiedIds());
      }
  }
  