[tests] Add GoogleTest as the test framework.

CMakeLists.txt

@@ -73,6 +73,19 @@ add_dependencies(GoogleBenchmark project_googlebenchmark)
 find_package(Threads)
 target_link_libraries(GoogleBenchmark INTERFACE Threads::Threads)
 
+#-------------------------------------------------------------------------------
+# Deploy GoogleTest
+#-------------------------------------------------------------------------------
+
+include(FetchContent)
+FetchContent_Declare(
+  googletest
+  URL https://github.com/google/googletest/archive/609281088cfefc76f9d0ce82e1ff6c30cc3591e5.zip
+)
+
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+FetchContent_MakeAvailable(googletest)
+
 #-------------------------------------------------------------------------------
 # Find OpenCV
 #-------------------------------------------------------------------------------
@@ -86,3 +99,4 @@ include_directories(${OpenCV_INCLUDE_DIRS})
 
 add_subdirectory(lib)
 add_subdirectory(benchmarks)
+add_subdirectory(tests)

tests/CMakeLists.txt

+enable_testing()
+
+add_executable(
+  fake_test
+  container.cpp
+)
+target_link_libraries(
+  fake_test
+  gtest_main
+)
+
+include(GoogleTest)
+gtest_discover_tests(fake_test)

tests/container.cpp

+#include "Utils/Container.h"
+#include <gtest/gtest.h>
+
+// Use fake test for the initial version.
+TEST(FakeTest, BasicAssertions) {
+  EXPECT_STRNE("after landing the improvements of memref descriptor",
+               "please remove this!");
+}