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LabelTransactionStateTest.java
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LabelTransactionStateTest.java
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/*
* Copyright (c) 2002-2017 "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.kernel.impl.api.state;
import org.junit.Before;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.neo4j.collection.primitive.PrimitiveIntCollections;
import org.neo4j.collection.primitive.PrimitiveLongCollections;
import org.neo4j.cursor.Cursor;
import org.neo4j.kernel.api.exceptions.EntityNotFoundException;
import org.neo4j.kernel.api.index.IndexDescriptor;
import org.neo4j.kernel.api.txstate.TransactionState;
import org.neo4j.kernel.impl.api.KernelStatement;
import org.neo4j.kernel.impl.api.StateHandlingStatementOperations;
import org.neo4j.kernel.impl.api.StatementOperationsTestHelper;
import org.neo4j.kernel.impl.api.legacyindex.InternalAutoIndexing;
import org.neo4j.kernel.impl.api.store.StoreStatement;
import org.neo4j.kernel.impl.index.LegacyIndexStore;
import org.neo4j.storageengine.api.NodeItem;
import org.neo4j.storageengine.api.StoreReadLayer;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import static org.neo4j.helpers.collection.Iterators.asSet;
import static org.neo4j.kernel.impl.api.state.StubCursors.asLabelCursor;
import static org.neo4j.kernel.impl.api.state.StubCursors.asNodeCursor;
import static org.neo4j.kernel.impl.api.state.StubCursors.asPropertyCursor;
import static org.neo4j.test.mockito.answer.Neo4jMockitoAnswers.answerAsIteratorFrom;
import static org.neo4j.test.mockito.answer.Neo4jMockitoAnswers.answerAsPrimitiveLongIteratorFrom;
public class LabelTransactionStateTest
{
@Before
public void before() throws Exception
{
store = mock( StoreReadLayer.class );
when( store.indexesGetForLabel( labelId1 ) ).then( answerAsIteratorFrom( Collections
.<IndexDescriptor>emptyList() ) );
when( store.indexesGetForLabel( labelId2 ) ).then( answerAsIteratorFrom( Collections
.<IndexDescriptor>emptyList() ) );
when( store.indexesGetAll() ).then( answerAsIteratorFrom( Collections.<IndexDescriptor>emptyList() ) );
txState = new TxState();
state = StatementOperationsTestHelper.mockedState( txState );
txContext = new StateHandlingStatementOperations( store, mock( InternalAutoIndexing.class ),
mock( ConstraintIndexCreator.class ), mock( LegacyIndexStore.class ) );
storeStatement = mock( StoreStatement.class );
when( state.getStoreStatement() ).thenReturn( storeStatement );
}
@Test
public void addOnlyLabelShouldBeVisibleInTx() throws Exception
{
// GIVEN
commitNoLabels();
// WHEN
txContext.nodeAddLabel( state, nodeId, labelId1 );
// THEN
assertLabels( labelId1 );
}
@Test
public void addAdditionalLabelShouldBeReflectedWithinTx() throws Exception
{
// GIVEN
commitLabels( labelId1 );
// WHEN
txContext.nodeAddLabel( state, nodeId, labelId2 );
// THEN
assertLabels( labelId1, labelId2 );
}
@Test
public void addAlreadyExistingLabelShouldBeReflectedWithinTx() throws Exception
{
// GIVEN
commitLabels( labelId1 );
// WHEN
txContext.nodeAddLabel( state, nodeId, labelId1 );
// THEN
assertLabels( labelId1 );
}
@Test
public void removeCommittedLabelShouldBeReflectedWithinTx() throws Exception
{
// GIVEN
commitLabels( labelId1, labelId2 );
// WHEN
txContext.nodeRemoveLabel( state, nodeId, labelId1 );
// THEN
assertLabels( labelId2 );
}
@Test
public void removeAddedLabelInTxShouldBeReflectedWithinTx() throws Exception
{
// GIVEN
commitLabels( labelId1 );
// WHEN
txContext.nodeAddLabel( state, nodeId, labelId2 );
txContext.nodeRemoveLabel( state, nodeId, labelId2 );
// THEN
assertLabels( labelId1 );
}
@Test
public void addRemovedLabelInTxShouldBeReflectedWithinTx() throws Exception
{
// GIVEN
commitLabels( labelId1 );
// WHEN
txContext.nodeRemoveLabel( state, nodeId, labelId1 );
txContext.nodeAddLabel( state, nodeId, labelId1 );
// THEN
assertLabels( labelId1 );
}
@Test
public void addedLabelsShouldBeReflectedWhenGettingNodesForLabel() throws Exception
{
// GIVEN
commitLabels(
labels( 0, 1, 2 ),
labels( 1, 2, 3 ),
labels( 2, 1, 3 ) );
// WHEN
txContext.nodeAddLabel( state, 2, 2 );
// THEN
assertEquals( asSet( 0L, 1L, 2L ), PrimitiveLongCollections.toSet( txContext.nodesGetForLabel( state, 2 ) ) );
}
@Test
public void removedLabelsShouldBeReflectedWhenGettingNodesForLabel() throws Exception
{
// GIVEN
commitLabels(
labels( 0, 1, 2 ),
labels( 1, 2, 3 ),
labels( 2, 1, 3 ) );
// WHEN
txContext.nodeRemoveLabel( state, 1, 2 );
// THEN
assertEquals( asSet( 0L ), PrimitiveLongCollections.toSet( txContext.nodesGetForLabel( state, 2 ) ) );
}
@Test
public void addingNewLabelToNodeShouldRespondTrue() throws Exception
{
// GIVEN
commitNoLabels();
// WHEN
boolean added = txContext.nodeAddLabel( state, nodeId, labelId1 );
// THEN
assertTrue( "Should have been added now", added );
}
@Test
public void addingExistingLabelToNodeShouldRespondFalse() throws Exception
{
// GIVEN
commitLabels( labelId1 );
// WHEN
boolean added = txContext.nodeAddLabel( state, nodeId, labelId1 );
// THEN
assertFalse( "Shouldn't have been added now", added );
}
@Test
public void removingExistingLabelFromNodeShouldRespondTrue() throws Exception
{
// GIVEN
commitLabels( labelId1 );
// WHEN
boolean removed = txContext.nodeRemoveLabel( state, nodeId, labelId1 );
// THEN
assertTrue( "Should have been removed now", removed );
}
@Test
public void removingNonExistentLabelFromNodeShouldRespondFalse() throws Exception
{
// GIVEN
commitNoLabels();
// WHEN
txContext.nodeAddLabel( state, nodeId, labelId1 );
// THEN
assertLabels( labelId1 );
}
@Test
public void should_return_true_when_adding_new_label() throws Exception
{
// GIVEN
when( storeStatement.acquireSingleNodeCursor( 1337 ) ).thenReturn( asNodeCursor( 1337 ) );
// WHEN
boolean added = txContext.nodeAddLabel( state, 1337, 12 );
// THEN
assertTrue( "Label should have been added", added );
}
@Test
public void should_return_false_when_adding_existing_label() throws Exception
{
// GIVEN
when( storeStatement.acquireSingleNodeCursor( 1337 ) ).thenReturn( asNodeCursor( 1337, asPropertyCursor(),
asLabelCursor( 12 ) ) );
// WHEN
boolean added = txContext.nodeAddLabel( state, 1337, 12 );
// THEN
assertFalse( "Label should have been added", added );
}
@Test
public void should_return_true_when_removing_existing_label() throws Exception
{
// GIVEN
when( storeStatement.acquireSingleNodeCursor( 1337 ) ).thenReturn( asNodeCursor( 1337, asPropertyCursor(),
asLabelCursor( 12 ) ) );
// WHEN
boolean added = txContext.nodeRemoveLabel( state, 1337, 12 );
// THEN
assertTrue( "Label should have been removed", added );
}
@Test
public void should_return_true_when_removing_non_existant_label() throws Exception
{
// GIVEN
when( storeStatement.acquireSingleNodeCursor( 1337 ) ).thenReturn( asNodeCursor( 1337 ) );
// WHEN
boolean removed = txContext.nodeRemoveLabel( state, 1337, 12 );
// THEN
assertFalse( "Label should have been removed", removed );
}
// exists
private final int labelId1 = 10, labelId2 = 12;
private final long nodeId = 20;
private StoreReadLayer store;
private TransactionState txState;
private StateHandlingStatementOperations txContext;
private KernelStatement state;
private StoreStatement storeStatement;
private static class Labels
{
private final long nodeId;
private final Integer[] labelIds;
Labels( long nodeId, Integer... labelIds )
{
this.nodeId = nodeId;
this.labelIds = labelIds;
}
}
private static Labels labels( long nodeId, Integer... labelIds )
{
return new Labels( nodeId, labelIds );
}
private void commitLabels( Labels... labels ) throws Exception
{
Map<Integer,Collection<Long>> allLabels = new HashMap<>();
for ( Labels nodeLabels : labels )
{
when( storeStatement.acquireSingleNodeCursor( nodeLabels.nodeId ) ).thenReturn( StubCursors.asNodeCursor(
nodeLabels.nodeId, asPropertyCursor(), asLabelCursor( nodeLabels.labelIds ) ) );
for ( int label : nodeLabels.labelIds )
{
Collection<Long> nodes = allLabels.get( label );
if ( nodes == null )
{
nodes = new ArrayList<>();
allLabels.put( label, nodes );
}
nodes.add( nodeLabels.nodeId );
}
}
for ( Map.Entry<Integer,Collection<Long>> entry : allLabels.entrySet() )
{
when( store.nodesGetForLabel( state.getStoreStatement(), entry.getKey() ) )
.then( answerAsPrimitiveLongIteratorFrom( entry.getValue() ) );
}
}
private void commitNoLabels() throws Exception
{
commitLabels( new Integer[0] );
}
private void commitLabels( Integer... labels ) throws Exception
{
commitLabels( labels( nodeId, labels ) );
}
private void assertLabels( Integer... labels ) throws EntityNotFoundException
{
try ( Cursor<NodeItem> cursor = txContext.nodeCursorById( state, nodeId ) )
{
if ( cursor.next() )
{
assertEquals( asSet( labels ), PrimitiveIntCollections.toSet( cursor.get().getLabels() ) );
}
}
for ( int label : labels )
{
try ( Cursor<NodeItem> cursor = txContext.nodeCursorById( state, nodeId ) )
{
if ( cursor.next() )
{
assertTrue( "Expected labels not found on node", cursor.get().hasLabel( label ) );
}
}
}
}
}