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MembershipWaiterTest.java
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MembershipWaiterTest.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 Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.coreedge.core.consensus.membership;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.TimeoutException;
import org.junit.Before;
import org.junit.Test;
import org.neo4j.coreedge.core.consensus.RaftMachine;
import org.neo4j.coreedge.core.consensus.log.InMemoryRaftLog;
import org.neo4j.coreedge.core.consensus.log.RaftLogEntry;
import org.neo4j.coreedge.core.consensus.state.ExposedRaftState;
import org.neo4j.coreedge.core.consensus.state.RaftStateBuilder;
import org.neo4j.kernel.internal.DatabaseHealth;
import org.neo4j.logging.NullLogProvider;
import org.neo4j.test.OnDemandJobScheduler;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.NANOSECONDS;
import static org.junit.Assert.fail;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import static org.neo4j.coreedge.core.consensus.ReplicatedInteger.valueOf;
import static org.neo4j.coreedge.identity.RaftTestMember.member;
public class MembershipWaiterTest
{
private DatabaseHealth dbHealth = mock( DatabaseHealth.class );
@Before
public void mocking()
{
when( dbHealth.isHealthy() ).thenReturn( true );
}
@Test
public void shouldReturnImmediatelyIfMemberAndCaughtUp() throws Exception
{
OnDemandJobScheduler jobScheduler = new OnDemandJobScheduler();
MembershipWaiter waiter = new MembershipWaiter( member( 0 ), jobScheduler, () -> dbHealth, 500,
NullLogProvider.getInstance() );
InMemoryRaftLog raftLog = new InMemoryRaftLog();
raftLog.append( new RaftLogEntry( 0, valueOf( 0 ) ) );
ExposedRaftState raftState = RaftStateBuilder.raftState()
.votingMembers( member( 0 ) )
.leaderCommit( 0 )
.entryLog( raftLog )
.commitIndex( 0L )
.build().copy();
RaftMachine raft = mock( RaftMachine.class );
when( raft.state() ).thenReturn( raftState );
CompletableFuture<Boolean> future = waiter.waitUntilCaughtUpMember( raft );
jobScheduler.runJob();
future.get( 0, NANOSECONDS );
}
@Test
public void shouldTimeoutIfCaughtUpButNotMember() throws Exception
{
OnDemandJobScheduler jobScheduler = new OnDemandJobScheduler();
MembershipWaiter waiter = new MembershipWaiter( member( 0 ), jobScheduler, () -> dbHealth, 1,
NullLogProvider.getInstance() );
ExposedRaftState raftState = RaftStateBuilder.raftState()
.votingMembers( member( 1 ) )
.leaderCommit( 0 )
.build().copy();
RaftMachine raft = mock( RaftMachine.class );
when( raft.state() ).thenReturn( raftState );
CompletableFuture<Boolean> future = waiter.waitUntilCaughtUpMember( raft );
jobScheduler.runJob();
jobScheduler.runJob();
try
{
future.get( 10, MILLISECONDS );
fail( "Should have timed out." );
}
catch ( TimeoutException e )
{
// expected
}
}
@Test
public void shouldTimeoutIfMemberButNotCaughtUp() throws Exception
{
OnDemandJobScheduler jobScheduler = new OnDemandJobScheduler();
MembershipWaiter waiter = new MembershipWaiter( member( 0 ), jobScheduler, () -> dbHealth, 1,
NullLogProvider.getInstance() );
ExposedRaftState raftState = RaftStateBuilder.raftState()
.votingMembers( member( 0 ), member( 1 ) )
.leaderCommit( 0 )
.build().copy();
RaftMachine raft = mock( RaftMachine.class );
when( raft.state() ).thenReturn( raftState );
CompletableFuture<Boolean> future = waiter.waitUntilCaughtUpMember( raft );
jobScheduler.runJob();
jobScheduler.runJob();
try
{
future.get( 10, MILLISECONDS );
fail( "Should have timed out." );
}
catch ( TimeoutException e )
{
// expected
}
}
}