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Diffstat (limited to 'src/mongo/dbtests/replica_set_tests.cpp')
-rw-r--r-- | src/mongo/dbtests/replica_set_tests.cpp | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/mongo/dbtests/replica_set_tests.cpp b/src/mongo/dbtests/replica_set_tests.cpp new file mode 100644 index 00000000000..0d9a7cc3a3b --- /dev/null +++ b/src/mongo/dbtests/replica_set_tests.cpp @@ -0,0 +1,127 @@ +/** + * Copyright (C) 2017 MongoDB Inc. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License, version 3, + * as published by the Free Software Foundation. + * + * 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/>. + * + * As a special exception, the copyright holders give permission to link the + * code of portions of this program with the OpenSSL library under certain + * conditions as described in each individual source file and distribute + * linked combinations including the program with the OpenSSL library. You + * must comply with the GNU Affero General Public License in all respects + * for all of the code used other than as permitted herein. If you modify + * file(s) with this exception, you may extend this exception to your + * version of the file(s), but you are not obligated to do so. If you do not + * wish to do so, delete this exception statement from your version. If you + * delete this exception statement from all source files in the program, + * then also delete it in the license file. + */ + +#include "mongo/platform/basic.h" + +#include "mongo/db/client.h" +#include "mongo/db/dbdirectclient.h" +#include "mongo/db/repl/last_vote.h" +#include "mongo/db/repl/replication_coordinator_external_state_impl.h" +#include "mongo/db/service_context.h" +#include "mongo/stdx/memory.h" +#include "mongo/unittest/unittest.h" + +namespace mongo { +namespace { + +ServiceContext::UniqueOperationContext makeOpCtx() { + return cc().makeOperationContext(); +} + +class ReplicaSetTest : public mongo::unittest::Test { +protected: + void setUp() { + auto txn = makeOpCtx(); + _replCoordExternalState.reset(new repl::ReplicationCoordinatorExternalStateImpl()); + } + + void tearDown() { + auto txn = makeOpCtx(); + DBDirectClient client(txn.get()); + client.dropCollection("local.replset.election"); + + _replCoordExternalState.reset(); + } + + repl::ReplicationCoordinatorExternalStateImpl* getReplCoordExternalState() { + return _replCoordExternalState.get(); + } + +private: + std::unique_ptr<repl::ReplicationCoordinatorExternalStateImpl> _replCoordExternalState; +}; + +TEST_F(ReplicaSetTest, ReplCoordExternalStateStoresLastVoteWithNewTerm) { + auto txn = makeOpCtx(); + auto replCoordExternalState = getReplCoordExternalState(); + + replCoordExternalState->storeLocalLastVoteDocument(txn.get(), repl::LastVote{2, 1}); + + auto lastVote = replCoordExternalState->loadLocalLastVoteDocument(txn.get()); + ASSERT_OK(lastVote.getStatus()); + ASSERT_EQ(lastVote.getValue().getTerm(), 2); + ASSERT_EQ(lastVote.getValue().getCandidateIndex(), 1); + + replCoordExternalState->storeLocalLastVoteDocument(txn.get(), repl::LastVote{3, 1}); + + lastVote = replCoordExternalState->loadLocalLastVoteDocument(txn.get()); + ASSERT_OK(lastVote.getStatus()); + ASSERT_EQ(lastVote.getValue().getTerm(), 3); + ASSERT_EQ(lastVote.getValue().getCandidateIndex(), 1); +} + +TEST_F(ReplicaSetTest, ReplCoordExternalStateDoesNotStoreLastVoteWithOldTerm) { + auto txn = makeOpCtx(); + auto replCoordExternalState = getReplCoordExternalState(); + + replCoordExternalState->storeLocalLastVoteDocument(txn.get(), repl::LastVote{2, 1}); + + auto lastVote = replCoordExternalState->loadLocalLastVoteDocument(txn.get()); + ASSERT_OK(lastVote.getStatus()); + ASSERT_EQ(lastVote.getValue().getTerm(), 2); + ASSERT_EQ(lastVote.getValue().getCandidateIndex(), 1); + + replCoordExternalState->storeLocalLastVoteDocument(txn.get(), repl::LastVote{1, 1}); + + lastVote = replCoordExternalState->loadLocalLastVoteDocument(txn.get()); + ASSERT_OK(lastVote.getStatus()); + ASSERT_EQ(lastVote.getValue().getTerm(), 2); + ASSERT_EQ(lastVote.getValue().getCandidateIndex(), 1); +} + +TEST_F(ReplicaSetTest, ReplCoordExternalStateDoesNotStoreLastVoteWithEqualTerm) { + auto txn = makeOpCtx(); + auto replCoordExternalState = getReplCoordExternalState(); + + replCoordExternalState->storeLocalLastVoteDocument(txn.get(), repl::LastVote{2, 1}); + + auto lastVote = replCoordExternalState->loadLocalLastVoteDocument(txn.get()); + ASSERT_OK(lastVote.getStatus()); + ASSERT_EQ(lastVote.getValue().getTerm(), 2); + ASSERT_EQ(lastVote.getValue().getCandidateIndex(), 1); + + replCoordExternalState->storeLocalLastVoteDocument(txn.get(), repl::LastVote{2, 2}); + + lastVote = replCoordExternalState->loadLocalLastVoteDocument(txn.get()); + ASSERT_OK(lastVote.getStatus()); + ASSERT_EQ(lastVote.getValue().getTerm(), 2); + ASSERT_EQ(lastVote.getValue().getCandidateIndex(), 1); +} + +} // namespace +} // namespace mongo |