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.LockedException;
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.*;
import static org.multiverse.TestUtils.assertOrecValue;
import static org.multiverse.api.TxnThreadLocal.*;
import static org.multiverse.stms.gamma.GammaTestUtils.*;
public class GammaTxnLong_atomicGetTest {
private GammaStm stm;
@Before
public void setUp() {
stm = new GammaStm();
clearThreadLocalTxn();
}
@Test(expected = LockedException.class)
public void whenUnconstructed() {
GammaTxn tx = stm.newDefaultTxn();
GammaTxnLong ref = new GammaTxnLong(tx);
ref.atomicGet();
}
@Test
public void whenActiveTransactionAvailable_thenIgnored() {
GammaTxnLong ref = new GammaTxnLong(stm, 100);
GammaTxn tx = stm.newDefaultTxn();
setThreadLocalTxn(tx);
ref.set(10);
assertEquals(100, ref.atomicGet());
assertSame(tx, getThreadLocalTxn());
}
@Test
public void whenUpdatedBiasedOnUnlocked() {
GammaTxnLong ref = new GammaTxnLong(stm, 100);
long result = ref.atomicGet();
assertEquals(100, result);
//assertUpdateBiased(ref);
}
@Test
public void whenUpdateBiasedAndPrivatizedByOther_thenLockedException() {
GammaTxnLong ref = new GammaTxnLong(stm, 100);
long version = ref.getVersion();
GammaTxn otherTx = stm.newDefaultTxn();
ref.getLock().acquire(otherTx, LockMode.Exclusive);
try {
ref.atomicGet();
fail();
} catch (LockedException ex) {
}
assertSurplus(ref, 1);
assertWriteBiased(ref);
assertRefHasExclusiveLock(ref, otherTx);
assertVersionAndValue(ref, version, 100);
}
@Test
public void whenUpdateBiasedAndEnsuredByOther() {
GammaTxnLong ref = new GammaTxnLong(stm, 100);
long version = ref.getVersion();
GammaTxn otherTx = stm.newDefaultTxn();
ref.getLock().acquire(otherTx, LockMode.Write);
long result = ref.atomicGet();
assertEquals(100, result);
assertSurplus(ref, 1);
assertRefHasWriteLock(ref, otherTx);
assertWriteBiased(ref);
assertVersionAndValue(ref, version, 100);
}
@Test
public void whenReadBiasedAndUnlocked() {
GammaTxnLong ref = makeReadBiased(new GammaTxnLong(stm, 100));
long result = ref.atomicGet();
assertEquals(100, result);
assertReadBiased(ref);
}
@Test
public void whenReadBiasedAndPrivatizedByOther_thenLockedException() {
GammaTxnLong ref = makeReadBiased(new GammaTxnLong(stm, 100));
long version = ref.getVersion();
GammaTxn otherTx = stm.newDefaultTxn();
ref.getLock().acquire(otherTx, LockMode.Exclusive);
long orecValue = ref.orec;
try {
ref.atomicGet();
fail();
} catch (LockedException ex) {
}
assertOrecValue(ref, orecValue);
assertRefHasExclusiveLock(ref, otherTx);
assertVersionAndValue(ref, version, 100);
}
@Test
public void whenReadBiasedAndEnsuredByOther_thenLockedException() {
GammaTxnLong ref = makeReadBiased(new GammaTxnLong(stm, 100));
long version = ref.getVersion();
GammaTxn otherTx = stm.newDefaultTxn();
ref.getLock().acquire(otherTx, LockMode.Exclusive);
long orecValue = ref.orec;
try {
ref.atomicGet();
fail();
} catch (LockedException expected) {
}
assertOrecValue(ref,orecValue);
assertVersionAndValue(ref, version, 100);
}
}