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test(transaction_manager): add 6 new unit tests #43

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137 changes: 137 additions & 0 deletions tests/transaction_manager_tests.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -57,4 +57,141 @@ TEST(TransactionManagerTests, Isolation) {
tm.commit(txn2);
}

TEST(TransactionManagerTests, BeginWithIsolationLevels) {
auto catalog = Catalog::create();
storage::StorageManager disk_manager("./test_data");
storage::BufferPoolManager bpm(cloudsql::config::Config::DEFAULT_BUFFER_POOL_SIZE,
disk_manager);
LockManager lm;
TransactionManager tm(lm, *catalog, bpm, bpm.get_log_manager());

Transaction* const txn1 = tm.begin(IsolationLevel::READ_COMMITTED);
ASSERT_NE(txn1, nullptr);
EXPECT_EQ(txn1->get_state(), TransactionState::RUNNING);

Transaction* const txn2 = tm.begin(IsolationLevel::REPEATABLE_READ);
ASSERT_NE(txn2, nullptr);
EXPECT_EQ(txn2->get_state(), TransactionState::RUNNING);

Transaction* const txn3 = tm.begin(IsolationLevel::SERIALIZABLE);
ASSERT_NE(txn3, nullptr);
EXPECT_EQ(txn3->get_state(), TransactionState::RUNNING);

tm.commit(txn1);
tm.commit(txn2);
tm.commit(txn3);
}

TEST(TransactionManagerTests, PrepareTransaction) {
auto catalog = Catalog::create();
storage::StorageManager disk_manager("./test_data");
storage::BufferPoolManager bpm(cloudsql::config::Config::DEFAULT_BUFFER_POOL_SIZE,
disk_manager);
LockManager lm;
TransactionManager tm(lm, *catalog, bpm, bpm.get_log_manager());

Transaction* const txn = tm.begin();
ASSERT_NE(txn, nullptr);
EXPECT_EQ(txn->get_state(), TransactionState::RUNNING);

tm.prepare(txn);
EXPECT_EQ(txn->get_state(), TransactionState::PREPARED);

tm.commit(txn);
EXPECT_EQ(txn->get_state(), TransactionState::COMMITTED);
}

TEST(TransactionManagerTests, GetTransaction) {
auto catalog = Catalog::create();
storage::StorageManager disk_manager("./test_data");
storage::BufferPoolManager bpm(cloudsql::config::Config::DEFAULT_BUFFER_POOL_SIZE,
disk_manager);
LockManager lm;
TransactionManager tm(lm, *catalog, bpm, bpm.get_log_manager());

Transaction* const txn1 = tm.begin();
ASSERT_NE(txn1, nullptr);

// Get existing transaction
EXPECT_EQ(tm.get_transaction(txn1->get_id()), txn1);

// Get non-existent transaction
EXPECT_EQ(tm.get_transaction(9999), nullptr);

tm.commit(txn1);

// After commit, transaction is no longer active
EXPECT_EQ(tm.get_transaction(txn1->get_id()), nullptr);
}

TEST(TransactionManagerTests, CommitIdempotent) {
auto catalog = Catalog::create();
storage::StorageManager disk_manager("./test_data");
storage::BufferPoolManager bpm(cloudsql::config::Config::DEFAULT_BUFFER_POOL_SIZE,
disk_manager);
LockManager lm;
TransactionManager tm(lm, *catalog, bpm, bpm.get_log_manager());

Transaction* const txn = tm.begin();
ASSERT_NE(txn, nullptr);

tm.commit(txn);
EXPECT_EQ(txn->get_state(), TransactionState::COMMITTED);

// Commit again should be safe (idempotent)
tm.commit(txn);
EXPECT_EQ(txn->get_state(), TransactionState::COMMITTED);
}

TEST(TransactionManagerTests, AbortIdempotent) {
auto catalog = Catalog::create();
storage::StorageManager disk_manager("./test_data");
storage::BufferPoolManager bpm(cloudsql::config::Config::DEFAULT_BUFFER_POOL_SIZE,
disk_manager);
LockManager lm;
TransactionManager tm(lm, *catalog, bpm, bpm.get_log_manager());

Transaction* const txn = tm.begin();
ASSERT_NE(txn, nullptr);

tm.abort(txn);
EXPECT_EQ(txn->get_state(), TransactionState::ABORTED);

// Abort again should be safe (idempotent)
tm.abort(txn);
EXPECT_EQ(txn->get_state(), TransactionState::ABORTED);
}

TEST(TransactionManagerTests, MultipleTransactions) {
auto catalog = Catalog::create();
storage::StorageManager disk_manager("./test_data");
storage::BufferPoolManager bpm(cloudsql::config::Config::DEFAULT_BUFFER_POOL_SIZE,
disk_manager);
LockManager lm;
TransactionManager tm(lm, *catalog, bpm, bpm.get_log_manager());

Transaction* txns[5];
for (int i = 0; i < 5; ++i) {
txns[i] = tm.begin();
ASSERT_NE(txns[i], nullptr);
EXPECT_EQ(txns[i]->get_state(), TransactionState::RUNNING);
}

// Verify IDs are ordered
for (int i = 1; i < 5; ++i) {
EXPECT_GT(txns[i]->get_id(), txns[i - 1]->get_id());
}

// Commit even-indexed transactions, abort odd-indexed
for (int i = 0; i < 5; ++i) {
if (i % 2 == 0) {
tm.commit(txns[i]);
EXPECT_EQ(txns[i]->get_state(), TransactionState::COMMITTED);
} else {
tm.abort(txns[i]);
EXPECT_EQ(txns[i]->get_state(), TransactionState::ABORTED);
}
}
}

} // namespace
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