diff options
Diffstat (limited to 'src/mongo/db/query/find_common_test.cpp')
| -rw-r--r-- | src/mongo/db/query/find_common_test.cpp | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/mongo/db/query/find_common_test.cpp b/src/mongo/db/query/find_common_test.cpp new file mode 100644 index 00000000000..d7dfc10d950 --- /dev/null +++ b/src/mongo/db/query/find_common_test.cpp @@ -0,0 +1,74 @@ +/** + * Copyright (C) 2023-present MongoDB, Inc. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the Server Side Public License, version 1, + * as published by MongoDB, Inc. + * + * 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 + * Server Side Public License for more details. + * + * You should have received a copy of the Server Side Public License + * along with this program. If not, see + * <http://www.mongodb.com/licensing/server-side-public-license>. + * + * 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 Server Side 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 <string> + +#include "mongo/bson/bsonobj.h" +#include "mongo/bson/bsonobjbuilder.h" +#include "mongo/db/query/find_common.h" + +#include "mongo/unittest/unittest.h" + +namespace { + +using namespace mongo; + +TEST(BSONArrayResponseSizeTrackerTest, AddLargeNumberOfElements) { + BSONObjBuilder bsonObjBuilder; + { + FindCommon::BSONArrayResponseSizeTracker sizeTracker; + BSONArrayBuilder arrayBuilder{bsonObjBuilder.subarrayStart("a")}; + BSONObj emptyObject; + while (sizeTracker.haveSpaceForNext(emptyObject)) { + sizeTracker.add(emptyObject); + arrayBuilder.append(emptyObject); + } + } + // If the BSON object is successfully constructed, then space accounting was correct. + bsonObjBuilder.obj(); +} +TEST(BSONArrayResponseSizeTrackerTest, CanAddAtLeastOneDocument) { + auto largeObject = BSON("a" << std::string(16 * 1024 * 1024, 'A')); + BSONObj emptyObject; + BSONObjBuilder bsonObjBuilder; + { + FindCommon::BSONArrayResponseSizeTracker sizeTracker; + BSONArrayBuilder arrayBuilder{bsonObjBuilder.subarrayStart("a")}; + // Add an object that is larger than 16MB. + ASSERT(sizeTracker.haveSpaceForNext(largeObject)); + sizeTracker.add(largeObject); + arrayBuilder.append(largeObject); + ASSERT(!sizeTracker.haveSpaceForNext(emptyObject)); + } + // If the BSON object is successfully constructed, then space accounting was correct. + bsonObjBuilder.obj(); +} +} // namespace |
