SERVER-62793 Add index component to shard version

1 files changed, 70 insertions, 0 deletions

diff --git a/src/mongo/s/shard_version_test.cpp b/src/mongo/s/shard_version_test.cpp
new file mode 100644
index 00000000000..9bd7858d1ec
--- /dev/null
+++ b/src/mongo/s/shard_version_test.cpp
@@ -0,0 +1,70 @@
+/**
+ *    Copyright (C) 2022-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/s/shard_version.h"
+#include "mongo/unittest/unittest.h"
+
+namespace mongo {
+namespace {
+
+TEST(ShardVersionTest, ConstructWithDifferentGenerationThrows) {
+    const CollectionGeneration gen1(OID::gen(), Timestamp(1, 2));
+    const CollectionGeneration gen2(OID::gen(), Timestamp(2, 1));
+    const ChunkVersion chunkVersion(gen1, {3, 4});
+    const CollectionIndexes collectionIndexes(gen2, {Timestamp(5, 6)});
+    ASSERT_THROWS_CODE(
+        ShardVersion(chunkVersion, collectionIndexes), DBException, ErrorCodes::BadValue);
+}
+
+TEST(ShardVersionTest, ConstructCorrectly) {
+    const CollectionGeneration gen(OID::gen(), Timestamp(1, 2));
+    const ChunkVersion chunkVersion(gen, {3, 4});
+    const CollectionIndexes collectionIndexes(gen, {Timestamp(5, 6)});
+    const ShardVersion shardVersion(chunkVersion, collectionIndexes);
+    ASSERT_EQ(shardVersion.getTimestamp(), Timestamp(1, 2));
+    ASSERT_EQ(shardVersion.majorVersion(), 3);
+    ASSERT_EQ(shardVersion.minorVersion(), 4);
+    ASSERT_EQ(shardVersion.indexVersion(), Timestamp(5, 6));
+}
+
+TEST(ShardVersionTest, ToAndFromBSON) {
+    const CollectionGeneration gen(OID::gen(), Timestamp(1, 2));
+    const ChunkVersion chunkVersion(gen, {3, 4});
+    const CollectionIndexes collectionIndexes(gen, {Timestamp(5, 6)});
+    const ShardVersion shardVersion(chunkVersion, collectionIndexes);
+
+    BSONObjBuilder builder;
+    shardVersion.serialize(ShardVersion::kShardVersionField, &builder);
+    const auto obj = builder.obj();
+
+    const auto fromBSON = ShardVersion::parse(obj[ShardVersion::kShardVersionField]);
+    ASSERT_EQ(fromBSON, shardVersion);
+}
+
+}  // namespace
+}  // namespace mongo