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ReadRelationshipRecordsBackwardsStepTest.java
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ReadRelationshipRecordsBackwardsStepTest.java
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/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.unsafe.impl.batchimport;
import org.junit.Test;
import java.util.Arrays;
import java.util.function.Predicate;
import java.util.stream.Stream;
import org.neo4j.kernel.impl.store.RelationshipStore;
import org.neo4j.kernel.impl.store.id.IdGeneratorImpl;
import org.neo4j.kernel.impl.store.record.RelationshipRecord;
import org.neo4j.unsafe.impl.batchimport.staging.StageControl;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
public class ReadRelationshipRecordsBackwardsStepTest
{
@Test
public void reservedIdIsSkipped()
{
long highId = 5;
int batchSize = (int) highId;
RelationshipStore store = StoreWithReservedId.newRelationshipStoreMock( highId );
when( store.getHighId() ).thenReturn( highId );
ReadRelationshipRecordsBackwardsStep step = new ReadRelationshipRecordsBackwardsStep(
mock( StageControl.class ), Configuration.DEFAULT, store );
Object batch = step.nextBatchOrNull( 0, batchSize );
assertNotNull( batch );
RelationshipRecord[] records = (RelationshipRecord[]) batch;
boolean hasRecordWithReservedId = Stream.of( records ).anyMatch( recordWithReservedId() );
assertFalse( "Batch contains record with reserved id " + Arrays.toString( records ), hasRecordWithReservedId );
}
private static Predicate<RelationshipRecord> recordWithReservedId()
{
return record -> record.getId() == IdGeneratorImpl.INTEGER_MINUS_ONE;
}
}