/**
* Copyright (C) 2014 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 .
*
* 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/storage/sorted_data_interface_test_harness.h"
#include
#include "mongo/db/storage/sorted_data_interface.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
namespace {
// Verify that a forward cursor is positioned at EOF when the index is empty.
TEST(SortedDataInterface, CursorIsEOFWhenEmpty) {
const auto harnessHelper(newSortedDataInterfaceHarnessHelper());
const std::unique_ptr sorted(harnessHelper->newSortedDataInterface(false));
{
const ServiceContext::UniqueOperationContext opCtx(harnessHelper->newOperationContext());
ASSERT(sorted->isEmpty(opCtx.get()));
}
{
const ServiceContext::UniqueOperationContext opCtx(harnessHelper->newOperationContext());
const std::unique_ptr cursor(sorted->newCursor(opCtx.get()));
ASSERT(!cursor->seek(kMinBSONKey, true));
// Cursor at EOF should remain at EOF when advanced
ASSERT(!cursor->next());
}
}
// Verify that a reverse cursor is positioned at EOF when the index is empty.
TEST(SortedDataInterface, CursorIsEOFWhenEmptyReversed) {
const auto harnessHelper(newSortedDataInterfaceHarnessHelper());
const std::unique_ptr sorted(harnessHelper->newSortedDataInterface(false));
{
const ServiceContext::UniqueOperationContext opCtx(harnessHelper->newOperationContext());
ASSERT(sorted->isEmpty(opCtx.get()));
}
{
const ServiceContext::UniqueOperationContext opCtx(harnessHelper->newOperationContext());
const std::unique_ptr cursor(
sorted->newCursor(opCtx.get(), false));
ASSERT(!cursor->seek(kMaxBSONKey, true));
// Cursor at EOF should remain at EOF when advanced
ASSERT(!cursor->next());
}
}
// Call advance() on a forward cursor until it is exhausted.
// When a cursor positioned at EOF is advanced, it stays at EOF.
TEST(SortedDataInterface, ExhaustCursor) {
const auto harnessHelper(newSortedDataInterfaceHarnessHelper());
const std::unique_ptr sorted(harnessHelper->newSortedDataInterface(false));
{
const ServiceContext::UniqueOperationContext opCtx(harnessHelper->newOperationContext());
ASSERT(sorted->isEmpty(opCtx.get()));
}
int nToInsert = 10;
for (int i = 0; i < nToInsert; i++) {
const ServiceContext::UniqueOperationContext opCtx(harnessHelper->newOperationContext());
{
WriteUnitOfWork uow(opCtx.get());
BSONObj key = BSON("" << i);
RecordId loc(42, i * 2);
ASSERT_OK(sorted->insert(opCtx.get(), key, loc, true));
uow.commit();
}
}
{
const ServiceContext::UniqueOperationContext opCtx(harnessHelper->newOperationContext());
ASSERT_EQUALS(nToInsert, sorted->numEntries(opCtx.get()));
}
{
const ServiceContext::UniqueOperationContext opCtx(harnessHelper->newOperationContext());
const std::unique_ptr cursor(sorted->newCursor(opCtx.get()));
for (int i = 0; i < nToInsert; i++) {
auto entry = i == 0 ? cursor->seek(kMinBSONKey, true) : cursor->next();
ASSERT_EQ(entry, IndexKeyEntry(BSON("" << i), RecordId(42, i * 2)));
}
ASSERT(!cursor->next());
// Cursor at EOF should remain at EOF when advanced
ASSERT(!cursor->next());
}
}
// Call advance() on a reverse cursor until it is exhausted.
// When a cursor positioned at EOF is advanced, it stays at EOF.
TEST(SortedDataInterface, ExhaustCursorReversed) {
const auto harnessHelper(newSortedDataInterfaceHarnessHelper());
const std::unique_ptr sorted(harnessHelper->newSortedDataInterface(false));
{
const ServiceContext::UniqueOperationContext opCtx(harnessHelper->newOperationContext());
ASSERT(sorted->isEmpty(opCtx.get()));
}
int nToInsert = 10;
for (int i = 0; i < nToInsert; i++) {
const ServiceContext::UniqueOperationContext opCtx(harnessHelper->newOperationContext());
{
WriteUnitOfWork uow(opCtx.get());
BSONObj key = BSON("" << i);
RecordId loc(42, i * 2);
ASSERT_OK(sorted->insert(opCtx.get(), key, loc, true));
uow.commit();
}
}
{
const ServiceContext::UniqueOperationContext opCtx(harnessHelper->newOperationContext());
ASSERT_EQUALS(nToInsert, sorted->numEntries(opCtx.get()));
}
{
const ServiceContext::UniqueOperationContext opCtx(harnessHelper->newOperationContext());
const std::unique_ptr cursor(
sorted->newCursor(opCtx.get(), false));
for (int i = nToInsert - 1; i >= 0; i--) {
auto entry = (i == nToInsert - 1) ? cursor->seek(kMaxBSONKey, true) : cursor->next();
ASSERT_EQ(entry, IndexKeyEntry(BSON("" << i), RecordId(42, i * 2)));
}
ASSERT(!cursor->next());
// Cursor at EOF should remain at EOF when advanced
ASSERT(!cursor->next());
}
}
} // namespace
} // namespace mongo