-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
ResetFuzzTest.java
223 lines (195 loc) · 7.73 KB
/
ResetFuzzTest.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
/*
* 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.bolt.v1.runtime;
import org.junit.After;
import org.junit.Test;
import java.io.IOException;
import java.time.Clock;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.atomic.AtomicLong;
import org.neo4j.bolt.security.auth.AuthenticationException;
import org.neo4j.bolt.security.auth.AuthenticationResult;
import org.neo4j.bolt.testing.BoltResponseRecorder;
import org.neo4j.bolt.testing.RecordedBoltResponse;
import org.neo4j.bolt.v1.messaging.BoltMessageRouter;
import org.neo4j.bolt.v1.messaging.BoltResponseMessageHandler;
import org.neo4j.bolt.v1.messaging.message.RequestMessage;
import org.neo4j.bolt.v1.runtime.concurrent.ThreadedWorkerFactory;
import org.neo4j.bolt.v1.runtime.spi.Record;
import org.neo4j.helpers.collection.Iterables;
import org.neo4j.kernel.api.exceptions.Status;
import org.neo4j.kernel.impl.logging.NullLogService;
import org.neo4j.kernel.impl.util.Neo4jJobScheduler;
import org.neo4j.kernel.lifecycle.LifeSupport;
import org.neo4j.logging.NullLog;
import static java.util.Arrays.asList;
import static java.util.Collections.singletonList;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.neo4j.bolt.testing.NullResponseHandler.nullResponseHandler;
import static org.neo4j.bolt.v1.messaging.BoltResponseMessage.SUCCESS;
import static org.neo4j.bolt.v1.messaging.message.DiscardAllMessage.discardAll;
import static org.neo4j.bolt.v1.messaging.message.PullAllMessage.pullAll;
import static org.neo4j.bolt.v1.messaging.message.RunMessage.run;
import static org.neo4j.helpers.collection.MapUtil.map;
public class ResetFuzzTest
{
// Because RESET has a "call ahead" mechanism where it will interrupt
// the session before RESET arrives in order to purge any statements
// ahead in the message queue, we use this test to convince ourselves
// there is no code path where RESET causes a session to not go back
// to a good state.
private final int seed = new Random().nextInt();
private final Random rand = new Random( seed );
private final LifeSupport life = new LifeSupport();
/** We track the number of un-closed transactions, and fail if we ever leak one */
private final AtomicLong liveTransactions = new AtomicLong();
private final Neo4jJobScheduler scheduler = life.add(new Neo4jJobScheduler());
private final BoltStateMachine machine = new BoltStateMachine( new FuzzStubSPI(), null, Clock.systemUTC() );
private final ThreadedWorkerFactory sessions =
new ThreadedWorkerFactory( ( enc, closer, clock ) -> machine, scheduler, NullLogService.getInstance() );
private final List<List<RequestMessage>> sequences = asList(
asList( run( "test", map() ), discardAll() ),
asList( run( "test", map() ), pullAll() ),
singletonList( run( "test", map() ) )
);
private final List<RequestMessage> sent = new LinkedList<>();
@Test
public void shouldAlwaysReturnToReadyAfterReset() throws Throwable
{
// given
life.start();
BoltWorker boltWorker = sessions.newWorker( "<test>" );
boltWorker.enqueue( session -> session.init( "ResetFuzzTest/0.0", map(), nullResponseHandler() ) );
BoltMessageRouter router = new BoltMessageRouter(
NullLog.getInstance(), boltWorker, new BoltResponseMessageHandler<IOException>()
{
@Override
public void onRecord( Record item ) throws IOException
{
}
@Override
public void onIgnored() throws IOException
{
}
@Override
public void onFailure( Status status, String message ) throws IOException
{
}
@Override
public void onSuccess( Map metadata ) throws IOException
{
}
}, ( () -> {} ) );
// Test random combinations of messages within a small budget of testing time.
long deadline = System.currentTimeMillis() + 2 * 1000;
// when
while( System.currentTimeMillis() < deadline )
{
dispatchRandomSequenceOfMessages( router );
assertWorkerWorks( boltWorker );
}
}
private void assertWorkerWorks( BoltWorker worker ) throws InterruptedException
{
BoltResponseRecorder recorder = new BoltResponseRecorder();
worker.enqueue( machine -> machine.reset( recorder ) );
try
{
RecordedBoltResponse response = recorder.nextResponse();
assertThat( SUCCESS, equalTo( response.message() ) );
assertThat( machine.state(), equalTo( BoltStateMachine.State.READY ) );
assertThat( liveTransactions.get(), equalTo( 0L ) );
}
catch( AssertionError e )
{
throw new AssertionError( String.format( "Expected session to return to good state after RESET, but " +
"assertion failed: %s.%n" +
"Seed: %s%n" +
"Messages sent:%n" +
"%s",
e.getMessage(), seed, Iterables.toString( sent, "\n" ) ), e );
}
}
private void dispatchRandomSequenceOfMessages( BoltMessageRouter messageHandler )
{
List<RequestMessage> sequence = sequences.get( rand.nextInt( sequences.size() ) );
for ( RequestMessage message : sequence )
{
sent.add( message );
message.dispatch( messageHandler );
}
}
@After
public void cleanup()
{
life.shutdown();
}
/**
* We can't use mockito to create this, because it stores all invocations,
* so we run out of RAM in like five seconds.
*/
private class FuzzStubSPI implements BoltStateMachine.SPI
{
@Override
public String connectionDescriptor()
{
return "<test>";
}
@Override
public void register( BoltStateMachine machine, String owner )
{
// do nothing
}
@Override
public TransactionStateMachine.SPI transactionSpi()
{
return null;
}
@Override
public void onTerminate( BoltStateMachine machine )
{
// do nothing
}
@Override
public void reportError( Neo4jError err )
{
// do nothing
}
@Override
public AuthenticationResult authenticate( Map<String,Object> authToken ) throws AuthenticationException
{
return AuthenticationResult.AUTH_DISABLED;
}
@Override
public void udcRegisterClient( String clientName )
{
// do nothing
}
@Override
public String version()
{
return "<test-version>";
}
}
}