e2e.cc 35.1 KB
Newer Older
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
// ----------------------------------------------------------------------
// File: e2e.cc
// Author: Georgios Bitzes - CERN
// ----------------------------------------------------------------------

/************************************************************************
 * quarkdb - a redis-like highly available key-value store              *
 * Copyright (C) 2016 CERN/Switzerland                                  *
 *                                                                      *
 * This program 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/>.*
 ************************************************************************/

#include "raft/RaftDispatcher.hh"
#include "raft/RaftReplicator.hh"
#include "raft/RaftTalker.hh"
#include "raft/RaftTimeouts.hh"
#include "raft/RaftCommitTracker.hh"
29
#include "raft/RaftConfig.hh"
30
#include "Poller.hh"
31
32
#include "Configuration.hh"
#include "QuarkDBNode.hh"
33
34
35
#include "test-utils.hh"
#include "RedisParser.hh"
#include <gtest/gtest.h>
36
#include "test-reply-macros.hh"
37
#include "qclient/QScanner.hh"
Georgios Bitzes's avatar
Georgios Bitzes committed
38
#include "qclient/QSet.hh"
Georgios Bitzes's avatar
Georgios Bitzes committed
39
#include "qclient/ConnectionInitiator.hh"
Georgios Bitzes's avatar
Georgios Bitzes committed
40
#include "qclient/QHash.hh"
41
42
43

using namespace quarkdb;
#define ASSERT_OK(msg) ASSERT_TRUE(msg.ok())
44
45
class Raft_e2e : public TestCluster3NodesFixture {};
class Raft_e2e5 : public TestCluster5NodesFixture {};
46

Georgios Bitzes's avatar
Georgios Bitzes committed
47
48
49
TEST_F(Raft_e2e, coup) {
  spinup(0); spinup(1); spinup(2);

50
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));
Georgios Bitzes's avatar
Georgios Bitzes committed
51
52
53
54
55
56

  int leaderID = getLeaderID();
  ASSERT_GE(leaderID, 0);
  ASSERT_LE(leaderID, 2);

  int instigator = (leaderID+1)%3;
Georgios Bitzes's avatar
Georgios Bitzes committed
57
58
59
60
61
62
63
64
65
66
67
68
  for(int i = 1; i < 10; i++) {
    RaftTerm term = state(instigator)->getCurrentTerm();
    ASSERT_REPLY(tunnel(instigator)->exec("RAFT_ATTEMPT_COUP"), "vive la revolution");
    RETRY_ASSERT_TRUE(state(instigator)->getCurrentTerm() > term);
    RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));

    if(instigator == getLeaderID()) {
      qdb_info("Successful coup in " << i << " attempts");
      return; // pass test
    }
  }
  ASSERT_TRUE(false) << "Test has failed";
Georgios Bitzes's avatar
Georgios Bitzes committed
69
70
}

71
72
TEST_F(Raft_e2e, simultaneous_clients) {
  spinup(0); spinup(1); spinup(2);
73
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));
74

75
  int leaderID = getServerID(state(0)->getSnapshot()->leader);
76
77
78
  ASSERT_GE(leaderID, 0);
  ASSERT_LE(leaderID, 2);

79
  LogIndex lastEntry = journal(leaderID)->getLogSize() - 1;
80
81
82
  std::vector<std::future<redisReplyPtr>> futures;

  // send off many requests, pipeline them
83
84
85
86
  futures.emplace_back(tunnel(leaderID)->exec("get", "asdf"));
  futures.emplace_back(tunnel(leaderID)->exec("ping"));
  futures.emplace_back(tunnel(leaderID)->exec("set", "asdf", "1234"));
  futures.emplace_back(tunnel(leaderID)->exec("get", "asdf"));
87
  futures.emplace_back(tunnel(leaderID)->exec("raft-fetch", SSTR(lastEntry+1), "raw"));
88
89
90
91
92
93

  ASSERT_REPLY(futures[0], "");
  ASSERT_REPLY(futures[1], "PONG");
  ASSERT_REPLY(futures[2], "OK");
  ASSERT_REPLY(futures[3], "1234");

94
  RaftEntry entry;
95
  ASSERT_TRUE(RaftParser::fetchResponse(futures[4].get().get(), entry));
96
97
98
  ASSERT_EQ(entry.term, state(0)->getCurrentTerm());
  ASSERT_EQ(entry.request, make_req("set", "asdf", "1234"));

99
  futures.clear();
100
101
  futures.emplace_back(tunnel(leaderID)->exec("set", "asdf", "3456"));
  futures.emplace_back(tunnel(leaderID)->exec("get", "asdf"));
102
103
104
105
106
107
108

  ASSERT_REPLY(futures[0], "OK");
  ASSERT_REPLY(futures[1], "3456");

  // make sure the log entry has been propagated to all nodes
  for(size_t i = 0; i < 3; i++) {
    std::string value;
109
    RETRY_ASSERT_TRUE(stateMachine(i)->get("asdf", value).ok() && value == "3456");
110
111
112
113
114
115
  }

  ASSERT_REPLY(tunnel(leaderID)->exec("set", "qwerty", "789"), "OK");
  futures.clear();

  // interwine pipelined requests from three connections
116
117
  qclient::QClient tunnel2(myself(leaderID).hostname, myself(leaderID).port);
  qclient::QClient tunnel3(myself(leaderID).hostname, myself(leaderID).port);
118
119
120
121
122
123

  futures.emplace_back(tunnel2.exec("get", "qwerty"));
  futures.emplace_back(tunnel(leaderID)->exec("set", "client2", "val"));
  futures.emplace_back(tunnel(leaderID)->exec("get", "client2"));
  futures.emplace_back(tunnel(leaderID)->exec("sadd", "myset", "a"));
  futures.emplace_back(tunnel2.exec("sadd", "myset", "b"));
124
  futures.emplace_back(tunnel2.exec("sadd", "myset")); // malformed request
125
126
127
128
129
130
131
132
133
134
135
  futures.emplace_back(tunnel3.exec("set", "client3", "myval"));
  futures.emplace_back(tunnel3.exec("get", "client3"));

  // not guaranteed that response will be "myval" here, since it's on a different connection
  futures.emplace_back(tunnel2.exec("get", "client3"));

  ASSERT_REPLY(futures[0], "789");
  ASSERT_REPLY(futures[1], "OK");
  ASSERT_REPLY(futures[2], "val");
  ASSERT_REPLY(futures[3], 1);
  ASSERT_REPLY(futures[4], 1);
136
137
138
  ASSERT_REPLY(futures[5], "ERR wrong number of arguments for 'sadd' command");
  ASSERT_REPLY(futures[6], "OK");
  ASSERT_REPLY(futures[7], "myval");
139

140
  redisReplyPtr reply = futures[8].get();
141
142
143
144
145
146
147
148
149
150
151
  std::string str = std::string(reply->str, reply->len);
  qdb_info("Race-y request: GET client3 ==> " << str);
  ASSERT_TRUE(str == "myval" || str == "");

  ASSERT_REPLY(tunnel2.exec("scard", "myset"), 2);

  // but here we've received an ack - response _must_ be myval
  ASSERT_REPLY(tunnel2.exec("get", "client3"), "myval");

  RaftInfo info = dispatcher(leaderID)->info();
  ASSERT_EQ(info.blockedWrites, 0u);
152
  ASSERT_EQ(info.leader, myself(leaderID));
153
154
155
156

  std::string err;
  std::string checkpointPath = SSTR(commonState.testdir << "/checkpoint");

157
  // Before taking a checkpoint, ensure node #0 is caught up
158
  RETRY_ASSERT_TRUE(stateMachine(0)->getLastApplied() == stateMachine(leaderID)->getLastApplied());
159

160
161
162
163
  ASSERT_TRUE(dispatcher()->checkpoint(checkpointPath, err));
  ASSERT_FALSE(dispatcher()->checkpoint(checkpointPath, err)); // exists already

  // pretty expensive to open two extra databases, but necessary
164
  StateMachine checkpointSM(SSTR(checkpointPath << "/state-machine"));
165
166
167
168
169
170
171
172
173
174
175
176
177
178

  std::string tmp;
  ASSERT_OK(checkpointSM.get("client3", tmp));
  ASSERT_EQ(tmp, "myval");

  ASSERT_OK(checkpointSM.get("client2", tmp));
  ASSERT_EQ(tmp, "val");

  // TODO: verify checkpointSM last applied, once atomic commits are implemented

  // ensure the checkpoint journal is identical to the original
  RaftJournal checkpointJournal(SSTR(checkpointPath << "/raft-journal"));
  ASSERT_EQ(checkpointJournal.getLogSize(), journal()->getLogSize());
  for(LogIndex i = 0; i < journal()->getLogSize(); i++) {
179
    RaftEntry entry1, entry2;
180

181
182
    ASSERT_OK(checkpointJournal.fetch(i, entry1));
    ASSERT_OK(journal()->fetch(i, entry2));
183
184
185

    ASSERT_EQ(entry1, entry2);
  }
186
}
187

188
189
TEST_F(Raft_e2e, hscan) {
  spinup(0); spinup(1); spinup(2);
190
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));
191
  int leaderID = getServerID(state(0)->getSnapshot()->leader);
192
193

  for(size_t i = 1; i < 10; i++) {
194
    ASSERT_REPLY(tunnel(leaderID)->exec("hset", "hash", SSTR("f" << i), SSTR("v" << i)), 1);
195
196
  }

197
  redisReplyPtr reply = tunnel(leaderID)->exec("hscan", "hash", "0", "cOUnT", "3").get();
198
  ASSERT_REPLY(reply, std::make_pair("next:f4", make_vec("f1", "v1", "f2", "v2", "f3", "v3")));
199

200
  reply = tunnel(leaderID)->exec("hscan", "hash", "0", "asdf", "123").get();
201
202
  ASSERT_ERR(reply, "ERR syntax error");

203
  reply = tunnel(leaderID)->exec("hscan", "hash", "next:f4", "COUNT", "3").get();
204
  ASSERT_REPLY(reply, std::make_pair("next:f7", make_vec("f4", "v4", "f5", "v5", "f6", "v6")));
205

206
  reply = tunnel(leaderID)->exec("hscan", "hash", "next:f7", "COUNT", "30").get();
207
  ASSERT_REPLY(reply, std::make_pair("0", make_vec("f7", "v7", "f8", "v8", "f9", "v9")));
208

209
  reply = tunnel(leaderID)->exec("hscan", "hash", "adfaf").get();
210
211
  ASSERT_ERR(reply, "ERR invalid cursor");

212
  reply = tunnel(leaderID)->exec("hscan", "hash", "next:zz").get();
213
  ASSERT_REPLY(reply, std::make_pair("0", make_vec()));
214
215
}

216
217
218
TEST_F(Raft_e2e, scan) {
  spinup(0); spinup(1); spinup(2);
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));
Georgios Bitzes's avatar
Georgios Bitzes committed
219
  int leaderID = getLeaderID();
220
221
222
223
224
225
226
227
228
229

  for(size_t i = 1; i < 10; i++) {
    ASSERT_REPLY(tunnel(leaderID)->exec("set", SSTR("f" << i), SSTR("v" << i)), "OK");
  }

  redisReplyPtr reply = tunnel(leaderID)->exec("scan", "0", "MATCH", "f[1-2]").get();
  ASSERT_REPLY(reply, std::make_pair("0", make_vec("f1", "f2")));

  reply = tunnel(leaderID)->exec("scan", "0", "MATCH", "f*", "COUNT", "3").get();
  ASSERT_REPLY(reply, std::make_pair("next:f4", make_vec("f1", "f2", "f3")));
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251

  // without MATCH
  reply = tunnel(leaderID)->exec("scan", "0", "COUNT", "3").get();
  ASSERT_REPLY(reply, std::make_pair("next:f4", make_vec("f1", "f2", "f3")));

  // with "*" MATCH pattern
  reply = tunnel(leaderID)->exec("scan", "0", "COUNT", "3", "MATCH", "*").get();
  ASSERT_REPLY(reply, std::make_pair("next:f4", make_vec("f1", "f2", "f3")));

  QScanner scanner(*tunnel(leaderID), "f*", 3);

  std::vector<std::string> ret;
  ASSERT_TRUE(scanner.next(ret));
  ASSERT_EQ(ret, make_vec("f1", "f2", "f3"));

  ASSERT_TRUE(scanner.next(ret));
  ASSERT_EQ(ret, make_vec("f4", "f5", "f6"));

  ASSERT_TRUE(scanner.next(ret));
  ASSERT_EQ(ret, make_vec("f7", "f8", "f9"));

  ASSERT_FALSE(scanner.next(ret));
252
253
}

Georgios Bitzes's avatar
Georgios Bitzes committed
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
TEST_F(Raft_e2e, test_qclient_convenience_classes) {
  spinup(0); spinup(1); spinup(2);
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));
  int leaderID = getLeaderID();

  std::vector<std::future<redisReplyPtr>> replies;
  for(size_t i = 0; i < 9; i++) {
    replies.push_back(tunnel(leaderID)->exec("HSET", "myhash", SSTR("f" << i), SSTR("v" << i)));
  }

  for(size_t i = 0; i < 9; i++) {
    ASSERT_REPLY(replies[i], 1);
  }

  qclient::QHash qhash(*tunnel(leaderID), "myhash");
  qclient::QHash::Iterator it = qhash.getIterator(2);

  for(size_t i = 0; i < 9; i++) {
    ASSERT_TRUE(it.valid());
    ASSERT_EQ(it.getKey(), SSTR("f" << i));
    ASSERT_EQ(it.getValue(), SSTR("v" << i));
    it.next();
  }

  ASSERT_FALSE(it.valid());
  ASSERT_EQ(it.requestsSoFar(), 5u);
}


283
284
285
TEST_F(Raft_e2e, test_many_redis_commands) {
  spinup(0); spinup(1); spinup(2);
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));
286
  int leaderID = getServerID(state(0)->getSnapshot()->leader);
287
288
289
290
291
292
293
294
295

  std::vector<std::future<redisReplyPtr>> futures;
  futures.emplace_back(tunnel(leaderID)->exec("SADD", "myset", "a", "b", "c"));
  futures.emplace_back(tunnel(leaderID)->exec("SCARD", "myset"));
  futures.emplace_back(tunnel(leaderID)->exec("Smembers", "myset"));
  futures.emplace_back(tunnel(leaderID)->exec("srem", "myset", "a", "b"));
  futures.emplace_back(tunnel(leaderID)->exec("srem", "myset", "b"));
  futures.emplace_back(tunnel(leaderID)->exec("scard", "myset"));
  futures.emplace_back(tunnel(leaderID)->exec("smembers", "myset"));
296
  futures.emplace_back(tunnel(leaderID)->exec("get", "empty_key"));
297
298
299

  ASSERT_REPLY(futures[0], 3);
  ASSERT_REPLY(futures[1], 3);
300
  ASSERT_REPLY(futures[2], make_vec("a", "b", "c"));
301
302
303
  ASSERT_REPLY(futures[3], 2);
  ASSERT_REPLY(futures[4], 0);
  ASSERT_REPLY(futures[5], 1);
304
  ASSERT_REPLY(futures[6], make_vec("c"));
305
  ASSERT_NIL(futures[7]);
306
307
308
309
310
311
312
313
314

  futures.clear();

  futures.emplace_back(tunnel(leaderID)->exec("hset", "myhash", "a", "b"));
  futures.emplace_back(tunnel(leaderID)->exec("hset", "myhash", "b", "c"));
  futures.emplace_back(tunnel(leaderID)->exec("hset", "myhash", "c", "d"));
  futures.emplace_back(tunnel(leaderID)->exec("hset", "myhash", "a", "d"));
  futures.emplace_back(tunnel(leaderID)->exec("hdel", "myhash", "a", "b", "b"));
  futures.emplace_back(tunnel(leaderID)->exec("hdel", "myhash", "a"));
315
316
317
318
319
320
321
322
323
324
  futures.emplace_back(tunnel(leaderID)->exec("sadd", "myhash", "wrongtype"));
  futures.emplace_back(tunnel(leaderID)->exec("exists", "myhash"));
  futures.emplace_back(tunnel(leaderID)->exec("hdel", "myhash", "c"));
  futures.emplace_back(tunnel(leaderID)->exec("exists", "myhash"));
  futures.emplace_back(tunnel(leaderID)->exec("sadd", "myhash", "wrongtype"));
  futures.emplace_back(tunnel(leaderID)->exec("exists", "myhash"));
  futures.emplace_back(tunnel(leaderID)->exec("hset", "myhash", "a", "b"));
  futures.emplace_back(tunnel(leaderID)->exec("srem", "myhash", "wrongtype"));
  futures.emplace_back(tunnel(leaderID)->exec("exists", "myhash"));
  futures.emplace_back(tunnel(leaderID)->exec("hset", "myhash", "a", "b"));
325
  futures.emplace_back(tunnel(leaderID)->exec("exists", "myhash", "myhash", "asdf"));
326
327
328
329
330
  futures.emplace_back(tunnel(leaderID)->exec("hexists", "myhash", "a"));
  futures.emplace_back(tunnel(leaderID)->exec("hexists", "myhash", "b"));
  futures.emplace_back(tunnel(leaderID)->exec("sismember", "myhash", "b"));
  futures.emplace_back(tunnel(leaderID)->exec("scard", "myhash"));
  futures.emplace_back(tunnel(leaderID)->exec("scard", "does-not-exist"));
331
  futures.emplace_back(tunnel(leaderID)->exec("raft_invalid_command"));
332
  futures.emplace_back(tunnel(leaderID)->exec("quarkdb_invalid_command"));
333
  futures.emplace_back(tunnel(leaderID)->exec("raft-fetch-last", "7", "raw"));
334

335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
  size_t count = 0;
  ASSERT_REPLY(futures[count++], 1);
  ASSERT_REPLY(futures[count++], 1);
  ASSERT_REPLY(futures[count++], 1);
  ASSERT_REPLY(futures[count++], 0);
  ASSERT_REPLY(futures[count++], 2);
  ASSERT_REPLY(futures[count++], 0);
  ASSERT_REPLY(futures[count++], "ERR Invalid argument: WRONGTYPE Operation against a key holding the wrong kind of value");
  ASSERT_REPLY(futures[count++], 1);
  ASSERT_REPLY(futures[count++], 1);
  ASSERT_REPLY(futures[count++], 0);
  ASSERT_REPLY(futures[count++], 1);
  ASSERT_REPLY(futures[count++], 1);
  ASSERT_REPLY(futures[count++], "ERR Invalid argument: WRONGTYPE Operation against a key holding the wrong kind of value");
  ASSERT_REPLY(futures[count++], 1);
  ASSERT_REPLY(futures[count++], 0);
  ASSERT_REPLY(futures[count++], 1);
  ASSERT_REPLY(futures[count++], 2);
  ASSERT_REPLY(futures[count++], 1);
  ASSERT_REPLY(futures[count++], 0);
  ASSERT_REPLY(futures[count++], "ERR Invalid argument: WRONGTYPE Operation against a key holding the wrong kind of value");
  ASSERT_REPLY(futures[count++], "ERR Invalid argument: WRONGTYPE Operation against a key holding the wrong kind of value");
  ASSERT_REPLY(futures[count++], 0);
358
  ASSERT_REPLY(futures[count++], "ERR internal dispatching error");
359
  ASSERT_REPLY(futures[count++], "ERR internal dispatching error");
360

361
362
363
364
365
366
367
368
369
370
371
  redisReplyPtr entries = futures[count++].get();
  std::vector<RaftEntry> lastEntries;

  ASSERT_TRUE(RaftParser::fetchLastResponse(entries, lastEntries));
  for(size_t i = 1; i <= 7; i++) {
    RaftEntry comparison;
    LogIndex index = journal(leaderID)->getLogSize() - i;
    ASSERT_OK(journal(leaderID)->fetch(index, comparison));
    ASSERT_EQ(lastEntries[7 - i], comparison);
  }

372
373
  futures.clear();
  futures.emplace_back(tunnel(leaderID)->exec("set", "mystring", "asdf"));
374
375
  futures.emplace_back(tunnel(leaderID)->exec("keys", "*"));
  futures.emplace_back(tunnel(leaderID)->exec("exists", "mystring", "myset", "myhash", "adfa", "myhash"));
376
  futures.emplace_back(tunnel(leaderID)->exec("del", "myhash", "myset", "mystring"));
377
  futures.emplace_back(tunnel(leaderID)->exec("exists", "mystring", "myset", "myhash", "adfa", "myhash"));
378
379
380
  futures.emplace_back(tunnel(leaderID)->exec("del", "myhash", "myset"));

  ASSERT_REPLY(futures[0], "OK");
381
  ASSERT_REPLY(futures[1], make_vec("myhash", "myset", "mystring"));
382
383
384
385
  ASSERT_REPLY(futures[2], 4);
  ASSERT_REPLY(futures[3], 3);
  ASSERT_REPLY(futures[4], 0);
  ASSERT_REPLY(futures[5], 0);
386
387
388
389
390
391
392

  futures.clear();
  futures.emplace_back(tunnel(leaderID)->exec("set", "a", "aa"));
  futures.emplace_back(tunnel(leaderID)->exec("set", "aa", "a"));
  futures.emplace_back(tunnel(leaderID)->exec("get", "a"));
  futures.emplace_back(tunnel(leaderID)->exec("del", "a"));
  futures.emplace_back(tunnel(leaderID)->exec("get", "aa"));
393
  futures.emplace_back(tunnel(leaderID)->exec("keys", "*"));
394
395
396
397
398
399

  ASSERT_REPLY(futures[0], "OK");
  ASSERT_REPLY(futures[1], "OK");
  ASSERT_REPLY(futures[2], "aa");
  ASSERT_REPLY(futures[3], 1);
  ASSERT_REPLY(futures[4], "a");
400
  ASSERT_REPLY(futures[5], make_vec("aa"));
401
402

  futures.clear();
403
404
  futures.emplace_back(tunnel(leaderID)->exec("config_getall"));
  futures.emplace_back(tunnel(leaderID)->exec("config_set", "some.config.value", "1234"));
405
406
  futures.emplace_back(tunnel(leaderID)->exec("flushall"));
  futures.emplace_back(tunnel(leaderID)->exec("del", "aa"));
407
408
409
  futures.emplace_back(tunnel(leaderID)->exec("config_get", "some.config.value", "1234"));
  futures.emplace_back(tunnel(leaderID)->exec("config_get", "some.config.value"));
  futures.emplace_back(tunnel(leaderID)->exec("config_getall"));
410

411
412
413
414
415
416
417
  ASSERT_REPLY(futures[0], "");
  ASSERT_REPLY(futures[1], "OK");
  ASSERT_REPLY(futures[2], "OK");
  ASSERT_REPLY(futures[3], 0);
  ASSERT_REPLY(futures[4], "ERR wrong number of arguments for 'config_get' command");
  ASSERT_REPLY(futures[5], "1234");
  ASSERT_REPLY(futures[6], make_vec("some.config.value", "1234"));
418
419
420
421
422
423

  futures.clear();
  futures.emplace_back(tunnel(leaderID)->exec("hset", "hash", "key1", "v1"));
  futures.emplace_back(tunnel(leaderID)->exec("hset", "hash2", "key1", "v1"));
  futures.emplace_back(tunnel(leaderID)->exec("exists", "hash", "hash2"));
  futures.emplace_back(tunnel(leaderID)->exec("del", "hash"));
424
425
  futures.emplace_back(tunnel(leaderID)->exec("raft_info"));
  futures.emplace_back(tunnel(leaderID)->exec("bad_command"));
426
427
428
429
430
431
432
  futures.emplace_back(tunnel(leaderID)->exec("exists", "hash"));
  futures.emplace_back(tunnel(leaderID)->exec("exists", "hash2"));

  ASSERT_REPLY(futures[0], 1);
  ASSERT_REPLY(futures[1], 1);
  ASSERT_REPLY(futures[2], 2);
  ASSERT_REPLY(futures[3], 1);
433
434
435
436
  // ignore futures[4]
  ASSERT_REPLY(futures[5], "ERR unknown command 'bad_command'");
  ASSERT_REPLY(futures[6], 0);
  ASSERT_REPLY(futures[7], 1);
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463

  futures.clear();
  futures.emplace_back(tunnel(leaderID)->exec("hmset", "hmset_test", "f1", "v1", "f2", "v2"));
  futures.emplace_back(tunnel(leaderID)->exec("exists", "hmset_test"));
  futures.emplace_back(tunnel(leaderID)->exec("hmset", "test"));
  futures.emplace_back(tunnel(leaderID)->exec("hmset", "hmset_test", "f2", "v3", "f4"));
  futures.emplace_back(tunnel(leaderID)->exec("hget", "hmset_test", "f1"));
  futures.emplace_back(tunnel(leaderID)->exec("hlen", "hmset_test"));
  futures.emplace_back(tunnel(leaderID)->exec("hmset", "hmset_test", "f2", "value2", "f3", "value3"));
  futures.emplace_back(tunnel(leaderID)->exec("hlen", "hmset_test"));
  futures.emplace_back(tunnel(leaderID)->exec("hget", "hmset_test", "f2"));
  futures.emplace_back(tunnel(leaderID)->exec("hmset", "hmset_test", "f3", "v3"));
  futures.emplace_back(tunnel(leaderID)->exec("hget", "hmset_test", "f3"));
  futures.emplace_back(tunnel(leaderID)->exec("hlen", "hmset_test"));

  ASSERT_REPLY(futures[0], "OK");
  ASSERT_REPLY(futures[1], 1);
  ASSERT_REPLY(futures[2], "ERR wrong number of arguments for 'hmset' command");
  ASSERT_REPLY(futures[3], "ERR wrong number of arguments for 'hmset' command");
  ASSERT_REPLY(futures[4], "v1");
  ASSERT_REPLY(futures[5], 2);
  ASSERT_REPLY(futures[6], "OK");
  ASSERT_REPLY(futures[7], 3);
  ASSERT_REPLY(futures[8], "value2");
  ASSERT_REPLY(futures[9], "OK");
  ASSERT_REPLY(futures[10], "v3");
  ASSERT_REPLY(futures[11], 3);
464
465
466
467

  futures.clear();
  futures.emplace_back(tunnel(leaderID)->exec("lpush", "list_test", "i1", "i2", "i3", "i4"));
  futures.emplace_back(tunnel(leaderID)->exec("exists", "list_test"));
Georgios Bitzes's avatar
Georgios Bitzes committed
468
  futures.emplace_back(tunnel(leaderID)->exec("llen", "list_test"));
469
  futures.emplace_back(tunnel(leaderID)->exec("lpop", "list_test"));
Georgios Bitzes's avatar
Georgios Bitzes committed
470
  futures.emplace_back(tunnel(leaderID)->exec("llen", "list_test"));
471
  futures.emplace_back(tunnel(leaderID)->exec("rpop", "list_test"));
Georgios Bitzes's avatar
Georgios Bitzes committed
472
  futures.emplace_back(tunnel(leaderID)->exec("llen", "list_test"));
473
  futures.emplace_back(tunnel(leaderID)->exec("del", "list_test"));
Georgios Bitzes's avatar
Georgios Bitzes committed
474
  futures.emplace_back(tunnel(leaderID)->exec("llen", "list_test"));
475
476
477
478
479
480
481
482
483
484
  futures.emplace_back(tunnel(leaderID)->exec("lpop", "list_test"));
  futures.emplace_back(tunnel(leaderID)->exec("rpush", "list_test", "i5", "i6", "i7", "i8"));
  futures.emplace_back(tunnel(leaderID)->exec("set", "list_test", "asdf"));
  futures.emplace_back(tunnel(leaderID)->exec("lpop", "list_test"));
  futures.emplace_back(tunnel(leaderID)->exec("rpop", "list_test"));
  futures.emplace_back(tunnel(leaderID)->exec("rpop", "list_test"));
  futures.emplace_back(tunnel(leaderID)->exec("lpop", "list_test"));
  futures.emplace_back(tunnel(leaderID)->exec("set", "list_test", "asdf"));
  futures.emplace_back(tunnel(leaderID)->exec("lpop", "list_test"));

Georgios Bitzes's avatar
Georgios Bitzes committed
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
  int i = 0;
  ASSERT_REPLY(futures[i++], 4);
  ASSERT_REPLY(futures[i++], 1);
  ASSERT_REPLY(futures[i++], 4);
  ASSERT_REPLY(futures[i++], "i4");
  ASSERT_REPLY(futures[i++], 3);
  ASSERT_REPLY(futures[i++], "i1");
  ASSERT_REPLY(futures[i++], 2);
  ASSERT_REPLY(futures[i++], 1);
  ASSERT_REPLY(futures[i++], 0);
  ASSERT_NIL(futures[i++]);
  ASSERT_REPLY(futures[i++], 4);
  ASSERT_REPLY(futures[i++], "ERR Invalid argument: WRONGTYPE Operation against a key holding the wrong kind of value");
  ASSERT_REPLY(futures[i++], "i5");
  ASSERT_REPLY(futures[i++], "i8");
  ASSERT_REPLY(futures[i++], "i7");
  ASSERT_REPLY(futures[i++], "i6");
  ASSERT_REPLY(futures[i++], "OK");
  ASSERT_REPLY(futures[i++], "ERR Invalid argument: WRONGTYPE Operation against a key holding the wrong kind of value");
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536

  // Now test qclient callbacks, ensure things stay reasonable when we mix them
  // with futures.
  TrivialQCallback c1;
  tunnel(leaderID)->execCB(&c1, "set", "qcl-counter", "1");

  TrivialQCallback c2;
  tunnel(leaderID)->execCB(&c2, "get", "qcl-counter");

  std::future<redisReplyPtr> fut1 = tunnel(leaderID)->exec("get", "qcl-counter");
  std::future<redisReplyPtr> fut2 = tunnel(leaderID)->exec("set", "qcl-counter", "2");
  std::future<redisReplyPtr> fut3 = tunnel(leaderID)->exec("get", "qcl-counter");

  TrivialQCallback c3;
  tunnel(leaderID)->execCB(&c3, "get", "qcl-counter");

  TrivialQCallback c4;
  tunnel(leaderID)->execCB(&c4, "set", "qcl-counter", "3");

  TrivialQCallback c5;
  tunnel(leaderID)->execCB(&c5, "get", "qcl-counter");

  std::future<redisReplyPtr> fut4 = tunnel(leaderID)->exec("get", "qcl-counter");

  ASSERT_REPLY(c1.getFuture(), "OK");
  ASSERT_REPLY(c2.getFuture(), "1");
  ASSERT_REPLY(fut1, "1");
  ASSERT_REPLY(fut2, "OK");
  ASSERT_REPLY(fut3, "2");
  ASSERT_REPLY(c3.getFuture(), "2");
  ASSERT_REPLY(c4.getFuture(), "OK");
  ASSERT_REPLY(c5.getFuture(), "3");
  ASSERT_REPLY(fut4, "3");
537
538
}

539
540
TEST_F(Raft_e2e, replication_with_trimmed_journal) {
  spinup(0); spinup(1);
541
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1));
542

543
  int leaderID = getServerID(state(0)->getSnapshot()->leader);
544
545
546
547
  int firstSlaveID = (leaderID+1)%2;
  ASSERT_GE(leaderID, 0);
  ASSERT_LE(leaderID, 1);

548
  // First, disable automatic resilvering..
549
  EncodedConfigChange configChange = raftconfig(leaderID)->setResilveringEnabled(false);
550
551
  ASSERT_TRUE(configChange.error.empty());
  ASSERT_REPLY(tunnel(leaderID)->execute(configChange.request), "OK");
552
553

  // send off many requests, pipeline them
554
  std::vector<std::future<redisReplyPtr>> futures;
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
  for(size_t i = 0; i < testreqs.size(); i++) {
    futures.emplace_back(tunnel(leaderID)->execute(testreqs[i]));
  }

  for(size_t i = 0; i < 2; i++) {
    ASSERT_REPLY(futures[i], "OK");
  }

  for(size_t i = 2; i < futures.size(); i++) {
    ASSERT_REPLY(futures[i], 1);
  }

  // now let's trim leader's journal..
  journal(leaderID)->trimUntil(4);

  // and verify it's NOT possible to bring node #2 up to date
  spinup(2);
572
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));
573
574
575
576
577
578
579
580
581

  ASSERT_EQ(journal(2)->getLogSize(), 1);
  ASSERT_EQ(journal(2)->getLogStart(), 0);

  // a divine intervention fills up the missing entries in node #2 journal
  for(size_t i = 1; i < 5; i++) {
    RaftEntry entry;
    ASSERT_TRUE(journal(firstSlaveID)->fetch(i, entry).ok());

582
    journal(2)->append(i, entry);
583
584
585
  }

  // now verify node #2 can be brought up to date successfully
586
587
588
589
590
  RETRY_ASSERT_TRUE(
    journal(0)->getLogSize() == journal(1)->getLogSize() &&
    journal(1)->getLogSize() == journal(2)->getLogSize()
  );

591
592
  ASSERT_EQ(journal(2)->getLogSize(), journal(leaderID)->getLogSize());
  ASSERT_EQ(journal(2)->getLogSize(), journal(firstSlaveID)->getLogSize());
593
594
595

  // Verify resilvering didn't happen.
  ASSERT_EQ(journal(2)->getLogStart(), 0);
596
}
Georgios Bitzes's avatar
Georgios Bitzes committed
597
598
599

TEST_F(Raft_e2e, membership_updates) {
  spinup(0); spinup(1); spinup(2);
600
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));
601
  int leaderID = getServerID(state(0)->getSnapshot()->leader);
Georgios Bitzes's avatar
Georgios Bitzes committed
602
603
604
605
  ASSERT_REPLY(tunnel(leaderID)->exec("set", "pi", "3.141516"), "OK");

  // throw a node out of the cluster
  int victim = (leaderID+1) % 3;
606
  RETRY_ASSERT_TRUE(checkFullConsensus(0, 1, 2));
607
  int index = journal(leaderID)->getLogSize() - 1;
Georgios Bitzes's avatar
Georgios Bitzes committed
608
  ASSERT_REPLY(tunnel(leaderID)->exec("RAFT_REMOVE_MEMBER", myself(victim).toString()), "OK");
609
  RETRY_ASSERT_TRUE(dispatcher(leaderID)->info().commitIndex == index + 1);
Georgios Bitzes's avatar
Georgios Bitzes committed
610
611

  // verify the cluster has not been disrupted
612
  ASSERT_EQ(state(leaderID)->getSnapshot()->leader, myself(leaderID));
Georgios Bitzes's avatar
Georgios Bitzes committed
613
614
615

  // add it back as an observer, verify consensus
  ASSERT_REPLY(tunnel(leaderID)->exec("RAFT_ADD_OBSERVER", myself(victim).toString()), "OK");
616

617
618
619
  RETRY_ASSERT_TRUE(dispatcher(0)->info().commitIndex == index + 2);
  RETRY_ASSERT_TRUE(dispatcher(1)->info().commitIndex == index + 2);
  RETRY_ASSERT_TRUE(dispatcher(2)->info().commitIndex == index + 2);
620

621
  ASSERT_EQ(state(victim)->getSnapshot()->status, RaftStatus::FOLLOWER);
Georgios Bitzes's avatar
Georgios Bitzes committed
622

623
624
  ASSERT_EQ(state(0)->getSnapshot()->leader, state(1)->getSnapshot()->leader);
  ASSERT_EQ(state(1)->getSnapshot()->leader, state(2)->getSnapshot()->leader);
Georgios Bitzes's avatar
Georgios Bitzes committed
625
626
627
628
629

  ASSERT_EQ(journal(0)->getLogSize(), journal(1)->getLogSize());
  ASSERT_EQ(journal(1)->getLogSize(), journal(2)->getLogSize());

  // cannot be a leader, it's an observer
630
  ASSERT_NE(state(0)->getSnapshot()->leader, myself(victim));
Georgios Bitzes's avatar
Georgios Bitzes committed
631
632

  // add back as a full voting member
633
  leaderID = getServerID(state(0)->getSnapshot()->leader);
Georgios Bitzes's avatar
Georgios Bitzes committed
634
  ASSERT_REPLY(tunnel(leaderID)->exec("RAFT_PROMOTE_OBSERVER", myself(victim).toString()), "OK");
635
  RETRY_ASSERT_TRUE(dispatcher(leaderID)->info().commitIndex == index + 3);
636
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));
Georgios Bitzes's avatar
Georgios Bitzes committed
637
638
}

639
640
TEST_F(Raft_e2e, reject_dangerous_membership_update) {
  spinup(0); spinup(1);
Georgios Bitzes's avatar
Georgios Bitzes committed
641
  RETRY_ASSERT_TRUE(checkFullConsensus(0, 1));
642
643
644
645
646
647
  int leaderID = getLeaderID();

  // make sure dangerous node removal is prevented
  int victim = (leaderID+1) % 2;
  redisReplyPtr reply = tunnel(leaderID)->exec("RAFT_REMOVE_MEMBER", myself(victim).toString()).get();
  ASSERT_ERR(reply, "ERR membership update blocked, new cluster would not have an up-to-date quorum");
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666

  // Try to remove a non-existent node
  ASSERT_REPLY(tunnel(leaderID)->exec("RAFT_REMOVE_MEMBER", RaftServer("random_host", 123).toString()),
    "ERR random_host:123 is neither an observer nor a full node.");

  // Make sure we can remove the third node
  ASSERT_REPLY(tunnel(leaderID)->exec("RAFT_REMOVE_MEMBER", myself(2).toString()), "OK");
  RaftMembership membership = journal(leaderID)->getMembership();
  RETRY_ASSERT_TRUE(journal(leaderID)->getCommitIndex() == membership.epoch);

  // Add it back as observer
  ASSERT_REPLY(tunnel(leaderID)->exec("RAFT_ADD_OBSERVER", myself(2).toString()), "OK");
  membership = journal(leaderID)->getMembership();
  RETRY_ASSERT_TRUE(journal(leaderID)->getCommitIndex() == membership.epoch);

  // Remove it again
  ASSERT_REPLY(tunnel(leaderID)->exec("RAFT_REMOVE_MEMBER", myself(2).toString()), "OK");
  membership = journal(leaderID)->getMembership();
  RETRY_ASSERT_TRUE(journal(leaderID)->getCommitIndex() == membership.epoch);
667
668
}

Georgios Bitzes's avatar
Georgios Bitzes committed
669
670
671
TEST_F(Raft_e2e5, membership_updates_with_disruptions) {
  // let's get this party started
  spinup(0); spinup(1); spinup(2); spinup(3);
672
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2, 3));
Georgios Bitzes's avatar
Georgios Bitzes committed
673
674

  // throw node #4 out of the cluster
675
  int leaderID = getServerID(state(0)->getSnapshot()->leader);
Georgios Bitzes's avatar
Georgios Bitzes committed
676
  ASSERT_REPLY(tunnel(leaderID)->exec("RAFT_REMOVE_MEMBER", myself(4).toString()), "OK");
677
678
679
680
681
682

  // wait until membership update has been committed
  RaftMembership membership = journal(leaderID)->getMembership();
  ASSERT_GT(membership.epoch, 0u);
  ASSERT_EQ(membership.nodes.size(), 4u);
  RETRY_ASSERT_TRUE(journal(leaderID)->getCommitIndex() == membership.epoch);
Georgios Bitzes's avatar
Georgios Bitzes committed
683
684
685

  // .. and now spinup node #4 :> Ensure it doesn't disrupt the current leader
  spinup(4);
686
  std::this_thread::sleep_for(raftclock()->getTimeouts().getHigh()*2);
687
  ASSERT_EQ(leaderID, getServerID(state(0)->getSnapshot()->leader));
Georgios Bitzes's avatar
Georgios Bitzes committed
688
689

  // verify the cluster has not been disrupted
690
  ASSERT_EQ(state(leaderID)->getSnapshot()->leader, myself(leaderID));
Georgios Bitzes's avatar
Georgios Bitzes committed
691
692
693
694
695
696

  // remove one more node
  int victim = (leaderID+1) % 5;
  if(victim == 4) victim = 2;

  ASSERT_REPLY(tunnel(leaderID)->exec("RAFT_REMOVE_MEMBER", myself(victim).toString()), "OK");
697
  std::this_thread::sleep_for(raftclock()->getTimeouts().getHigh()*2);
Georgios Bitzes's avatar
Georgios Bitzes committed
698
699

  // verify the cluster has not been disrupted
700
  ASSERT_EQ(state(leaderID)->getSnapshot()->leader, myself(leaderID));
Georgios Bitzes's avatar
Georgios Bitzes committed
701
702
703
704
705

  // issue a bunch of writes and reads
  ASSERT_REPLY(tunnel(leaderID)->exec("set", "123", "abc"), "OK");
  ASSERT_REPLY(tunnel(leaderID)->exec("get", "123"), "abc");
}
706

Georgios Bitzes's avatar
Georgios Bitzes committed
707
TEST_F(Raft_e2e, leader_steps_down_after_follower_loss) {
708
709
710
711
712
713
714
715
716
717
718
719
720
721
  // cluster with 2 nodes
  spinup(0); spinup(1);
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1));

  int leaderID = getLeaderID();
  ASSERT_GE(leaderID, 0);
  ASSERT_LE(leaderID, 1);

  RaftTerm term = state(leaderID)->getCurrentTerm();

  int followerID = (leaderID + 1)%2;
  spindown(followerID);

  RETRY_ASSERT_TRUE(term < state(leaderID)->getCurrentTerm());
722
  ASSERT_TRUE(state(leaderID)->getSnapshot()->leader.empty());
723
}
724
725
726
727
728
729
730
731
732
733
734

TEST_F(Raft_e2e, stale_reads) {
  spinup(0); spinup(1); spinup(2);
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));

  int leaderID = getLeaderID();
  int follower = (getLeaderID() + 1) % 3;

  ASSERT_REPLY(tunnel(leaderID)->exec("set", "abc", "1234"), "OK");
  ASSERT_REPLY(tunnel(follower)->exec("get", "abc"), SSTR("MOVED 0 " << myself(leaderID).toString()));

Georgios Bitzes's avatar
Georgios Bitzes committed
735
  ASSERT_REPLY(tunnel(follower)->exec("activate-stale-reads"), "OK");
736
737
738
739
740
741
742

  redisReplyPtr reply = tunnel(follower)->exec("get", "abc").get();
  qdb_info("Race-y read: " << std::string(reply->str, reply->len));

  RETRY_ASSERT_TRUE(checkFullConsensus(0, 1, 2));
  ASSERT_REPLY(tunnel(follower)->exec("get", "abc"), "1234");
}
Georgios Bitzes's avatar
Georgios Bitzes committed
743
744
745
746
747
748
749

TEST_F(Raft_e2e, monitor) {
  spinup(0); spinup(1); spinup(2);
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));

  int leaderID = getLeaderID();

750
751
752
753
754
  // Get connection ID
  redisReplyPtr connIDReply = tunnel(leaderID)->exec("client-id").get();
  std::string connID(connIDReply->str, connIDReply->len);
  qdb_info("Connection ID: " << connID);

Georgios Bitzes's avatar
Georgios Bitzes committed
755
756
757
758
759
760
761
762
763
764
765
766
767
768
  // We can't use QClient for this, it can't handle the output of MONITOR
  qclient::ConnectionInitiator initiator("localhost", myself(leaderID).port);
  ASSERT_TRUE(initiator.ok());

  Link link(initiator.getFd());
  BufferedReader reader(&link);

  ASSERT_EQ(link.Send("*1\r\n$7\r\nMONITOR\r\n"), 17);
  ASSERT_EQ(link.Send("random string"), 13);

  std::string response;
  RETRY_ASSERT_TRUE(reader.consume(5, response));
  ASSERT_EQ(response, "+OK\r\n");

769
  tunnel(leaderID)->exec("set", "abc", "aaaa" "\xab" "bbb");
Georgios Bitzes's avatar
Georgios Bitzes committed
770
  response.clear();
771
772
773
774

  std::string expectedReply = SSTR("+ [" << connID << "]: \"set\" \"abc\" \"aaaa\\xABbbb\"\r\n");
  RETRY_ASSERT_TRUE(reader.consume(expectedReply.size(), response));
  ASSERT_EQ(response, expectedReply);
Georgios Bitzes's avatar
Georgios Bitzes committed
775
776
777

  tunnel(leaderID)->exec("get", "abc");
  response.clear();
778
779
780
781

  expectedReply = SSTR("+ [" << connID << "]: \"get\" \"abc\"\r\n");
  RETRY_ASSERT_TRUE(reader.consume(expectedReply.size(), response));
  ASSERT_EQ(response, expectedReply);
Georgios Bitzes's avatar
Georgios Bitzes committed
782
}
Georgios Bitzes's avatar
Georgios Bitzes committed
783

784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
class PingCallback : qclient::QCallback {
public:
  PingCallback(qclient::QClient &q) : qcl(q) {
    flag = prom.get_future();
    qcl.execCB(this, "PING", SSTR(pingCounter));
  }

  void finalize(bool result) {
    isOk = result;
    prom.set_value();
  }

  virtual void handleResponse(redisReplyPtr &&reply) {
    if(!reply) finalize(false);
    if(reply->type != REDIS_REPLY_STRING) finalize(false);
    if(std::string(reply->str, reply->len) != SSTR(pingCounter)) finalize(false);
    qdb_info("Received successful ping response: " << pingCounter);

    pingCounter++;
    if(pingCounter == 5) return finalize(true);

    qcl.execCB(this, "PING", SSTR(pingCounter));
  }

  bool ok() {
    return isOk;
  }

  void wait() {
    flag.get();
  }

private:
  size_t pingCounter = 0;

  std::promise<void> prom;
  std::future<void> flag;
  bool isOk = true;
  qclient::QClient &qcl;
};

TEST_F(Raft_e2e, PingExtravaganza) {
  // A most efficient and sophisticated ping machinery.
  spinup(0); spinup(1); spinup(2);
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));
  int leaderID = getLeaderID();

  PingCallback pinger(*tunnel(leaderID));
  pinger.wait();
  ASSERT_TRUE(pinger.ok());
}

Georgios Bitzes's avatar
Georgios Bitzes committed
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
TEST_F(Raft_e2e, hincrbymulti) {
  spinup(0); spinup(1); spinup(2);
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));

  int leaderID = getLeaderID();

  ASSERT_REPLY(tunnel(leaderID)->exec("hincrbymulti", "h1", "h2", "3", "h2", "h3", "4"), 7);
  ASSERT_REPLY(tunnel(leaderID)->exec("hget", "h1", "h2"), "3");
  ASSERT_REPLY(tunnel(leaderID)->exec("hget", "h2", "h3"), "4");

  ASSERT_REPLY(tunnel(leaderID)->exec("hincrbymulti", "h1", "h2", "-5", "h2", "h3", "20", "h4", "h8"), "ERR wrong number of arguments for 'hincrbymulti' command");
  ASSERT_REPLY(tunnel(leaderID)->exec("hincrbymulti", "h1", "h2", "-5", "h2", "h3", "20", "h4", "h8", "13"), 35);

  ASSERT_REPLY(tunnel(leaderID)->exec("hget", "h1", "h2"), "-2");
  ASSERT_REPLY(tunnel(leaderID)->exec("hget", "h2", "h3"), "24");
  ASSERT_REPLY(tunnel(leaderID)->exec("hget", "h4", "h8"), "13");
}
Georgios Bitzes's avatar
Georgios Bitzes committed
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878

TEST_F(Raft_e2e, sscan) {
  spinup(0); spinup(1); spinup(2);
  RETRY_ASSERT_TRUE(checkStateConsensus(0, 1, 2));

  int leaderID = getLeaderID();

  redisReplyPtr reply = tunnel(leaderID)->exec("sscan", "myset", "0", "asdf", "123").get();
  ASSERT_ERR(reply, "ERR syntax error");

  ASSERT_REPLY(tunnel(leaderID)->exec("sadd", "myset", "a", "b", "c", "d", "e", "f", "g"), 7);

  reply = tunnel(leaderID)->exec("sscan", "myset", "0", "COUNT", "3").get();
  ASSERT_REPLY(reply, std::make_pair("next:d", make_vec("a", "b", "c")));

  reply = tunnel(leaderID)->exec("sscan", "myset", "next:d", "COUNT", "2").get();
  ASSERT_REPLY(reply, std::make_pair("next:f", make_vec("d", "e")));

  reply = tunnel(leaderID)->exec("sscan", "myset", "next:f", "COUNT", "2").get();
  ASSERT_REPLY(reply, std::make_pair("0", make_vec("f", "g")));

  reply = tunnel(leaderID)->exec("sscan", "myset", "next:zz").get();
  ASSERT_REPLY(reply, std::make_pair("0", make_vec()));

  reply = tunnel(leaderID)->exec("sscan", "not-existing", "next:zz").get();
  ASSERT_REPLY(reply, std::make_pair("0", make_vec()));
Georgios Bitzes's avatar
Georgios Bitzes committed
879
880
881
882
883
884
885

  QSet qset(*tunnel(leaderID), "myset");
  auto pair = qset.sscan("0", 2);

  ASSERT_EQ(pair.first, "next:c");
  ASSERT_EQ(pair.second, make_vec("a", "b"));

886
887
888
889
  pair = qset.sscan(pair.first, 2);
  ASSERT_EQ(pair.first, "next:e");
  ASSERT_EQ(pair.second, make_vec("c", "d"));

Georgios Bitzes's avatar
Georgios Bitzes committed
890
891
892
893
894
  QSet qset2(*tunnel(leaderID), "not-existing");
  pair = qset2.sscan("0", 2);

  ASSERT_EQ(pair.first, "0");
  ASSERT_EQ(pair.second, make_vec());
Georgios Bitzes's avatar
Georgios Bitzes committed
895
}