Add unit testes

tests/CMakeLists.txt

@@ -0,0 +1,31 @@
+project(ANSCustomModels_Tests LANGUAGES CXX)
+
+# ---------- Google Test (fetched once, shared by all sub-projects) ----------
+include(FetchContent)
+FetchContent_Declare(
+    googletest
+    GIT_REPOSITORY https://github.com/google/googletest.git
+    GIT_TAG        v1.14.0
+)
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+FetchContent_MakeAvailable(googletest)
+
+enable_testing()
+
+# ---------- Common paths (propagated to sub-projects via variables) ----------
+set(ANSLIB_INCLUDE_DIR   "C:/Projects/ANLS/ANSLIB/ANSLIB"   CACHE PATH "")
+set(OPENCV_INCLUDE_DIR   "C:/ANSLibs/opencv/include"        CACHE PATH "")
+set(ANSLIB_LIB_DIR       "C:/ProgramData/ANSCENTER/Shared"  CACHE PATH "")
+set(OPENCV_LIB_DIR       "C:/ANSLibs/opencv/x64/vc17/lib"  CACHE PATH "")
+set(OPENCV_BIN_DIR       "C:/ProgramData/ANSCENTER/Shared"   CACHE PATH "")
+set(TEST_COMMON_DIR      "${CMAKE_CURRENT_SOURCE_DIR}"       CACHE PATH "")
+
+# ---------- Place all test .exe files alongside the DLLs they need ----------
+# This ensures custom model DLLs (built by sibling projects) land in the same
+# directory as the test executables so Windows can find them at runtime.
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin" CACHE PATH "" FORCE)
+
+# ---------- Sub-project test executables ----------
+add_subdirectory(FireNSmokeDetection)
+add_subdirectory(HelmetDetection)
+add_subdirectory(WeaponDetection)