SERVER-65948 Add 'changeStreams' cluster-wide parameter

This parameter will be used to activate per-tenant
change collections in serverless environment.

1 files changed, 78 insertions, 0 deletions

diff --git a/src/mongo/db/change_streams_cluster_parameter_test.cpp b/src/mongo/db/change_streams_cluster_parameter_test.cpp
new file mode 100644
index 00000000000..80ef8d71da7
--- /dev/null
+++ b/src/mongo/db/change_streams_cluster_parameter_test.cpp
@@ -0,0 +1,78 @@
+/**
+ *    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/db/change_streams_cluster_parameter.h"
+#include "mongo/db/change_streams_cluster_parameter_gen.h"
+#include "mongo/unittest/unittest.h"
+
+namespace mongo {
+namespace {
+
+
+TEST(ValidateChangeStreamsClusterParameter, EnabledWithSuccess) {
+    ChangeStreamsClusterParameterStorage changeStreamClusterParam;
+    changeStreamClusterParam.setEnabled(true);
+    changeStreamClusterParam.setExpireAfterSeconds(3600);
+    auto result = validateChangeStreamsClusterParameter(changeStreamClusterParam);
+    ASSERT_TRUE(result.isOK());
+}
+
+TEST(ValidateChangeStreamsClusterParameter, EnabledWithNonPositiveExpireAfterSeconds) {
+    ChangeStreamsClusterParameterStorage changeStreamClusterParam;
+    changeStreamClusterParam.setEnabled(true);
+    changeStreamClusterParam.setExpireAfterSeconds(0);
+    auto resultZero = validateChangeStreamsClusterParameter(changeStreamClusterParam);
+    ASSERT_EQ(resultZero.code(), ErrorCodes::BadValue);
+
+    changeStreamClusterParam.setExpireAfterSeconds(-1);
+    auto resultNegative = validateChangeStreamsClusterParameter(changeStreamClusterParam);
+    ASSERT_EQ(resultNegative.code(), ErrorCodes::BadValue);
+}
+
+TEST(ValidateChangeStreamsClusterParameter, DisabledWithSuccess) {
+    ChangeStreamsClusterParameterStorage changeStreamClusterParam;
+    changeStreamClusterParam.setEnabled(false);
+    auto resultDefault = validateChangeStreamsClusterParameter(changeStreamClusterParam);
+    ASSERT_TRUE(resultDefault.isOK());
+
+    changeStreamClusterParam.setExpireAfterSeconds(0);
+    auto resultZero = validateChangeStreamsClusterParameter(changeStreamClusterParam);
+    ASSERT_TRUE(resultDefault.isOK());
+}
+
+TEST(ValidateChangeStreamsClusterParameter, DisabledWithNonZeroExpireAfterSeconds) {
+    ChangeStreamsClusterParameterStorage changeStreamClusterParam;
+    changeStreamClusterParam.setEnabled(false);
+    changeStreamClusterParam.setExpireAfterSeconds(1);
+    auto result = validateChangeStreamsClusterParameter(changeStreamClusterParam);
+    ASSERT_EQ(result.code(), ErrorCodes::BadValue);
+}
+
+}  // namespace
+}  // namespace mongo