Add unit tests to show tag works

Signed-off-by: Charlie Vigue <[email protected]>

test/unittests/CMakeLists.txt

@@ -70,6 +70,7 @@ add_executable(coreUnitTests
         test_route.cpp
         test_reliable.cpp
         test_splitlines.cpp
+        test_loggingmixin.cpp
         test_statickey.cpp
         test_streq.cpp
         test_time.cpp

test/unittests/test_loggingmixin.cpp

@@ -0,0 +1,27 @@
+
+#include "test_common.h"
+
+#include <openvpn/log/logger.hpp>
+
+using namespace openvpn;
+using namespace openvpn::logging;
+
+TEST(LoggingMixin, is_shared)
+{
+    auto lm1 = LoggingMixin<1>();
+    auto lm2 = LoggingMixin<1>();
+
+    EXPECT_EQ(lm1.log_level(), lm2.log_level());
+    lm1.set_log_level(lm1.log_level() + 1);
+    EXPECT_EQ(lm1.log_level(), lm2.log_level());
+}
+
+TEST(LoggingMixin, is_not_shared)
+{
+    auto lm1 = LoggingMixin<1, 1, int>();
+    auto lm2 = LoggingMixin<1, 1, float>();
+
+    EXPECT_EQ(lm1.log_level(), lm2.log_level());
+    lm1.set_log_level(lm1.log_level() + 1);
+    EXPECT_NE(lm1.log_level(), lm2.log_level());
+}