TEST_F(SnapshotManagerTests, FailsWithNoCommittedSnapshot) {
if (!snapshotManager)
return; // This test is only for engines that DO support SnapshotMangers.
auto op = makeOperation();
auto ru = op->recoveryUnit();
// Before first snapshot is created.
ASSERT_EQ(ru->setReadFromMajorityCommittedSnapshot(),
ErrorCodes::ReadConcernMajorityNotAvailableYet);
// There is a snapshot but it isn't committed.
auto name = prepareAndCreateSnapshot();
ASSERT_EQ(ru->setReadFromMajorityCommittedSnapshot(),
ErrorCodes::ReadConcernMajorityNotAvailableYet);
// Now there is a committed snapshot.
snapshotManager->setCommittedSnapshot(name);
ASSERT_OK(ru->setReadFromMajorityCommittedSnapshot());
// Not anymore!
snapshotManager->dropAllSnapshots();
ASSERT_EQ(ru->setReadFromMajorityCommittedSnapshot(),
ErrorCodes::ReadConcernMajorityNotAvailableYet);
}
Boolean::Ptr Expression::makeOperation(const std::string& expression) {
static const std::string seporators = " \n";
static const std::string singleTokens = "()&|";
static const std::string multipleTokens = "01";
Tokenizer tokenizer(expression, seporators, singleTokens, multipleTokens);
return makeOperation(tokenizer);
}
Numeric::Ptr Expression::makeOperation(const std::string& expression) {
static const std::string seporators = " \n";
static const std::string singleTokens = "()+-*/";
static const std::string multipleTokens = "0.123456789";
Tokenizer tokenizer(expression, seporators, singleTokens, multipleTokens);
return makeOperation(tokenizer);
}
int StringCalculator::calculateExpression(char string[])
{
StackInterface* stackObject = new PointerStack();
makePolish(string, stackObject);
//printf("%s\n", string);
int i = 0;
int length = strlen(string) + 1;
int argument1 = 1;
int argument2 = 1;
int tmpResult = 0;
for (i = 0; i < length; i++)
{
if (isNumber(string[i]))
stackObject->push(convertToInt(string[i]));
if (isSign(string[i]))
{
argument2 = stackObject->pop();
argument1 = stackObject->pop();
tmpResult = makeOperation(string[i], argument1, argument2);
stackObject->push(tmpResult);
}
}
int result = stackObject->pop();
delete stackObject;
return result;
}
int main()
{
pst head = NULL;
printf("vvedyte vyrazhenye\n");
char s[60];
scanf("%s", s);
int length = strlen(s);
for(int i = 0; i < length; i++)
{
if (!isSymbol(s[i]))
push(head, s[i] - '0');
else
if (isSymbol(s[i]))
{
int a = front(head);
pop(head);
int b = front(head);
pop(head);
push(head, makeOperation(s[i], a, b));
}
}
printf("result = ");
printf("%d\n",front(head));
deleteStack(head);
return 0;
}
int calculateSubtree(TreeNode* &node)
{
if(isSign(node->value))
{
return makeOperation(calculateSubtree(node->left),calculateSubtree(node->right),node->value);
}
else
return node->value;
}
TEST_F(SnapshotManagerTests, ConsistentIfNotSupported) {
if (snapshotManager)
return; // This test is only for engines that DON'T support SnapshotMangers.
auto op = makeOperation();
auto ru = op->recoveryUnit();
ASSERT(!ru->isReadingFromMajorityCommittedSnapshot());
ASSERT(!ru->getMajorityCommittedSnapshot());
}
TEST_F(SnapshotManagerTests, FailsAfterDropAllSnapshotsWhileYielded) {
if (!snapshotManager)
return; // This test is only for engines that DO support SnapshotMangers.
auto op = makeOperation();
// Start an operation using a committed snapshot.
auto name = prepareAndCreateSnapshot();
snapshotManager->setCommittedSnapshot(name);
ASSERT_OK(op->recoveryUnit()->setReadFromMajorityCommittedSnapshot());
ASSERT_EQ(itCountOn(op), 0); // acquires a snapshot.
// Everything still works until we abandon our snapshot.
snapshotManager->dropAllSnapshots();
ASSERT_EQ(itCountOn(op), 0);
// Now it doesn't.
op->recoveryUnit()->abandonSnapshot();
ASSERT_THROWS_CODE(
itCountOn(op), UserException, ErrorCodes::ReadConcernMajorityNotAvailableYet);
}
TEST_F(SnapshotManagerTests, BasicFunctionality) {
if (!snapshotManager)
return; // This test is only for engines that DO support SnapshotMangers.
// Snapshot variables are named according to the size of the RecordStore at the time of the
// snapshot.
auto snap0 = prepareAndCreateSnapshot();
insertRecordAndCommit();
auto snap1 = prepareAndCreateSnapshot();
insertRecordAndCommit();
prepareSnapshot();
insertRecordAndCommit();
auto snap2 = createSnapshot();
{
auto op = makeOperation();
WriteUnitOfWork wuow(op);
insertRecord(op);
prepareSnapshot(); // insert should still be invisible.
ASSERT_EQ(itCountOn(snapshotOperation), 3);
wuow.commit();
}
auto snap3 = createSnapshot();
{
auto op = makeOperation();
WriteUnitOfWork wuow(op);
insertRecord(op);
// rolling back wuow
}
auto snap4 = prepareAndCreateSnapshot();
// If these fail, everything is busted.
snapshotManager->setCommittedSnapshot(snap0);
ASSERT_EQ(itCountCommitted(), 0);
snapshotManager->setCommittedSnapshot(snap1);
ASSERT_EQ(itCountCommitted(), 1);
// If this fails, the snapshot is from the 'create' time rather than the 'prepare' time.
snapshotManager->setCommittedSnapshot(snap2);
ASSERT_EQ(itCountCommitted(), 2);
// If this fails, the snapshot contains writes that weren't yet committed.
snapshotManager->setCommittedSnapshot(snap3);
ASSERT_EQ(itCountCommitted(), 3);
// This op should keep its original snapshot until abandoned.
auto longOp = makeOperation();
ASSERT_OK(longOp->recoveryUnit()->setReadFromMajorityCommittedSnapshot());
ASSERT_EQ(itCountOn(longOp), 3);
// If this fails, the snapshot contains writes that were rolled back.
snapshotManager->setCommittedSnapshot(snap4);
ASSERT_EQ(itCountCommitted(), 4);
// If this fails, longOp changed snapshots at an illegal time.
ASSERT_EQ(itCountOn(longOp), 3);
// If this fails, snapshots aren't preserved while in use.
snapshotManager->cleanupUnneededSnapshots();
ASSERT_EQ(itCountOn(longOp), 3);
// If this fails, longOp didn't get a new snapshot when it should have.
longOp->recoveryUnit()->abandonSnapshot();
ASSERT_EQ(itCountOn(longOp), 4);
}
