Add virtual router tests

unittest/vslib/Makefile.am

@@ -52,6 +52,7 @@ testslibsaivs_SOURCES =	main_libsaivs.cpp \
 				test_sai_vs_tunnel.cpp \
 				test_sai_vs_stp.cpp \
 				test_sai_vs_udf.cpp \
+				test_sai_vs_virtual_router.cpp \
 				test_sai_vs_vlan.cpp \
 				test_sai_vs_hostif.cpp \
 				test_sai_vs_wred.cpp

unittest/vslib/test_sai_vs_virtual_router.cpp

@@ -0,0 +1,23 @@
+#include <gtest/gtest.h>
+
+extern "C" {
+#include "sai.h"
+}
+
+#include "swss/logger.h"
+
+TEST(libsaivs, virtual_router)
+{
+    sai_virtual_router_api_t *api = nullptr;
+
+    sai_api_query(SAI_API_VIRTUAL_ROUTER, (void**)&api);
+
+    EXPECT_NE(api, nullptr);
+
+    sai_object_id_t id;
+
+    EXPECT_NE(SAI_STATUS_SUCCESS, api->create_virtual_router(&id,0,0,0));
+    EXPECT_NE(SAI_STATUS_SUCCESS, api->remove_virtual_router(0));
+    EXPECT_NE(SAI_STATUS_SUCCESS, api->set_virtual_router_attribute(0,0));
+    EXPECT_NE(SAI_STATUS_SUCCESS, api->get_virtual_router_attribute(0,0,0));
+}