1 files changed, 48 insertions, 0 deletions
diff --git a/src/lib/database/tests/database_log_unittest.cc b/src/lib/database/tests/database_log_unittest.cc
new file mode 100644
index 0000000..1caa12c
--- /dev/null
+++ b/src/lib/database/tests/database_log_unittest.cc
@@ -0,0 +1,48 @@
+// Copyright (C) 2021 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <database/db_log.h>
+
+#include <gtest/gtest.h>
+
+using isc::db::DB_DBG_TRACE_DETAIL;
+using isc::db::DB_INVALID_ACCESS;
+using isc::db::DB_LOG_FATAL;
+using isc::db::DB_LOG_ERROR;
+using isc::db::DB_LOG_WARN;
+using isc::db::DB_LOG_INFO;
+using isc::db::DB_LOG_DEBUG;
+using isc::db::db_logger_mutex;
+
+namespace {
+
+/// Test that the mutex unlocks after a call to DB_LOG.
+/// Let's use DB_INVALID_ACCESS as an example for all.
+TEST(DatabaseLogTest, mutexIsolation) {
+    DB_LOG_FATAL(DB_INVALID_ACCESS).arg("hello");
+    EXPECT_TRUE(db_logger_mutex.try_lock());
+    db_logger_mutex.unlock();
+
+    DB_LOG_ERROR(DB_INVALID_ACCESS).arg("hello");
+    EXPECT_TRUE(db_logger_mutex.try_lock());
+    db_logger_mutex.unlock();
+
+    DB_LOG_WARN(DB_INVALID_ACCESS).arg("hello");
+    EXPECT_TRUE(db_logger_mutex.try_lock());
+    db_logger_mutex.unlock();
+
+    DB_LOG_INFO(DB_INVALID_ACCESS).arg("hello");
+    EXPECT_TRUE(db_logger_mutex.try_lock());
+    db_logger_mutex.unlock();
+
+    DB_LOG_DEBUG(DB_DBG_TRACE_DETAIL, DB_INVALID_ACCESS).arg("hello");
+    EXPECT_TRUE(db_logger_mutex.try_lock());
+    db_logger_mutex.unlock();
+}
+
+}  // namespace