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AbstractMandatoryTransactionsTest.java
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AbstractMandatoryTransactionsTest.java
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/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.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.graphdb;
import org.junit.Rule;
import java.util.function.Consumer;
import org.neo4j.test.rule.EmbeddedDatabaseRule;
import static org.junit.Assert.fail;
public abstract class AbstractMandatoryTransactionsTest<T>
{
@Rule
public EmbeddedDatabaseRule dbRule = new EmbeddedDatabaseRule();
public T obtainEntity()
{
GraphDatabaseService graphDatabaseService = dbRule.getGraphDatabaseAPI();
try ( Transaction tx = graphDatabaseService.beginTx() )
{
T result = obtainEntityInTransaction( graphDatabaseService );
tx.success();
return result;
}
}
public void obtainEntityInTerminatedTransaction( Consumer<T> f )
{
GraphDatabaseService graphDatabaseService = dbRule.getGraphDatabaseAPI();
try ( Transaction tx = graphDatabaseService.beginTx() )
{
T result = obtainEntityInTransaction( graphDatabaseService );
tx.terminate();
f.accept(result);
}
}
protected abstract T obtainEntityInTransaction( GraphDatabaseService graphDatabaseService );
public static <T> void assertFacadeMethodsThrowNotInTransaction( T entity, Consumer<T>[] methods )
{
for ( Consumer<T> method : methods )
{
try
{
method.accept( entity );
fail( "Transactions are mandatory, also for reads: " + method );
}
catch ( NotInTransactionException e )
{
// awesome
}
}
}
public void assertFacadeMethodsThrowAfterTerminate( Consumer<T>[] methods )
{
for ( final Consumer<T> method : methods )
{
obtainEntityInTerminatedTransaction( entity ->
{
try
{
method.accept( entity );
fail( "Transaction was terminated, yet not exception thrown in: " + method );
}
catch ( TransactionTerminatedException e )
{
// awesome
}
} );
}
}
}