package org.multiverse.stms.gamma.transactionalobjects.txnlong;
import org.junit.Before;
import org.junit.Test;
import org.multiverse.api.LockMode;
import org.multiverse.api.exceptions.DeadTxnException;
import org.multiverse.api.exceptions.PreparedTxnException;
import org.multiverse.api.exceptions.ReadWriteConflict;
import org.multiverse.api.exceptions.ReadonlyException;
import org.multiverse.stms.gamma.GammaStm;
import org.multiverse.stms.gamma.transactionalobjects.GammaTxnLong;
import org.multiverse.stms.gamma.transactions.GammaTxn;
import static org.junit.Assert.fail;
import static org.multiverse.TestUtils.assertIsAborted;
import static org.multiverse.TestUtils.assertIsCommitted;
import static org.multiverse.api.TxnThreadLocal.clearThreadLocalTxn;
import static org.multiverse.stms.gamma.GammaTestUtils.*;
public class GammaTxnLong_decrement2Test {
private GammaStm stm;
@Before
public void setUp() {
stm = new GammaStm();
clearThreadLocalTxn();
}
@Test
public void whenSuccess() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
GammaTxn tx = stm.newDefaultTxn();
ref.decrement(tx, 5);
tx.commit();
assertRefHasNoLocks(ref);
assertIsCommitted(tx);
assertVersionAndValue(ref, initialVersion + 1, initialValue - 5);
}
@Test
public void whenReadonlyTransaction_thenReadonlyException() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
GammaTxn tx = stm.newTxnFactoryBuilder()
.setReadonly(true)
.setSpeculative(false)
.newTransactionFactory()
.newTxn();
try {
ref.decrement(tx, 5);
fail();
} catch (ReadonlyException expected) {
}
assertRefHasNoLocks(ref);
assertIsAborted(tx);
assertVersionAndValue(ref, initialVersion, initialValue);
}
@Test
public void whenEnsuredByOther_thenDecrementSucceedsButCommitFails() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
GammaTxn otherTx = stm.newDefaultTxn();
ref.getLock().acquire(otherTx, LockMode.Write);
GammaTxn tx = stm.newDefaultTxn();
ref.decrement(tx, 5);
try {
tx.commit();
fail();
} catch (ReadWriteConflict expected) {
}
assertIsAborted(tx);
assertVersionAndValue(ref, initialVersion, initialValue);
assertRefHasWriteLock(ref, otherTx);
}
@Test
public void whenPrivatizedByOther_thenDecrementSucceedsButCommitFails() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
GammaTxn otherTx = stm.newDefaultTxn();
ref.getLock().acquire(otherTx, LockMode.Exclusive);
GammaTxn tx = stm.newDefaultTxn();
ref.decrement(tx, 5);
try {
tx.commit();
fail();
} catch (ReadWriteConflict expected) {
}
assertIsAborted(tx);
assertVersionAndValue(ref, initialVersion, initialValue);
assertRefHasExclusiveLock(ref, otherTx);
}
@Test
public void whenCommittedTransactionFound() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
GammaTxn tx = stm.newDefaultTxn();
tx.commit();
try {
ref.decrement(tx, 5);
fail();
} catch (DeadTxnException expected) {
}
assertRefHasNoLocks(ref);
assertIsCommitted(tx);
assertVersionAndValue(ref, initialVersion, initialValue);
}
@Test
public void whenAbortedTransactionFound_thenDeadTxnException() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
GammaTxn tx = stm.newDefaultTxn();
tx.abort();
try {
ref.decrement(tx, 5);
fail();
} catch (DeadTxnException expected) {
}
assertRefHasNoLocks(ref);
assertIsAborted(tx);
assertVersionAndValue(ref, initialVersion, initialValue);
}
@Test
public void whenPreparedTransactionFound_thenPreparedTxnException() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
GammaTxn tx = stm.newDefaultTxn();
tx.prepare();
try {
ref.decrement(tx, 5);
fail();
} catch (PreparedTxnException expected) {
}
assertRefHasNoLocks(ref);
assertIsAborted(tx);
assertVersionAndValue(ref, initialVersion, initialValue);
}
@Test
public void whenNoTransaction_thenTxnMandatoryException() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
try {
ref.decrement(null, 5);
fail();
} catch (NullPointerException expected) {
}
assertRefHasNoLocks(ref);
assertVersionAndValue(ref, initialVersion, initialValue);
}
}