refactor: Add CMake configuration for basic tests and integrate GTest

Author: FrozenLemonTee

tests/CMakeLists.txt

@@ -0,0 +1,47 @@
+enable_testing()
+
+if(NOT TARGET GTest::gtest)
+	include(FetchContent)
+
+	set(GTEST_VERSION_STABLE release-1.12.1 CACHE STRING "Stable GTest version")
+	set(GTEST_VERSION_LATEST v1.16.0 CACHE STRING "Latest GTest version")
+
+	if(NOT DEFINED GTEST_REPO)
+		set(REPO_PRIORITY_LIST
+				"git@github.com:google/googletest.git"
+				"https://github.com/google/googletest.git"
+				"https://gitee.com/mirrors/googletest.git"
+		)
+
+		foreach(repo IN LISTS REPO_PRIORITY_LIST)
+			execute_process(
+					COMMAND git ls-remote ${repo} -q
+					RESULT_VARIABLE result
+					OUTPUT_QUIET
+					ERROR_QUIET
+					TIMEOUT 5
+			)
+			if(result EQUAL 0)
+				set(GTEST_REPO ${repo} CACHE STRING "Selected GTest repository")
+				set(GTEST_VERSION ${GTEST_VERSION_LATEST} CACHE STRING "Selected GTest version")
+				message(STATUS "Selected GTest repository: ${repo}")
+				break()
+			endif()
+		endforeach()
+
+		if(NOT GTEST_REPO)
+			message(FATAL_ERROR "All GTest repositories are unavailable!")
+		endif()
+	endif()
+
+	FetchContent_Declare(
+			GTest
+			GIT_REPOSITORY ${GTEST_REPO}
+			GIT_TAG        ${GTEST_VERSION}
+			GIT_SHALLOW    TRUE
+	)
+
+	FetchContent_MakeAvailable(GTest)
+endif()
+
+add_subdirectory(basic)

tests/basic/CMakeLists.txt

@@ -0,0 +1,18 @@
+# tests/basic/CMakeLists.txt
+
+enable_testing()
+
+file(GLOB BASIC_TESTS "test_*.cpp")
+
+add_executable(basic_tests ${BASIC_TESTS})
+
+target_link_libraries(basic_tests PRIVATE GTest::gtest GTest::gmock GTest::gmock_main GTest::gtest_main)
+target_compile_features(basic_tests PRIVATE cxx_std_23)
+
+target_link_libraries(basic_tests PRIVATE mcpplibs-primitives)
+
+add_test(
+        NAME BASIC_TESTS
+        COMMAND $<TARGET_FILE:basic_tests>
+        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+)