gtest: Init submodule and update version

.github/workflows/cmake-ctest.yml

@@ -10,6 +10,7 @@ env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
   BUILD_TYPE: Release
   WITH_DLT_UNIT_TESTS: ON
+  BUILD_GMOCK: OFF
 
 jobs:
   build:
@@ -21,10 +22,19 @@ jobs:
     steps:
     - uses: actions/checkout@v3
 
+    - name: Prepare submodule
+      run: |
+          git submodule init 
+          git submodule update
+
     - name: Configure CMake
-      # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
+      # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a
+      # single-configuration generator such as make.
       # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
-      run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DWITH_DLT_UNIT_TESTS=${{env.WITH_DLT_UNIT_TESTS}}
+      run: |
+          cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} \
+                                               -DWITH_DLT_UNIT_TESTS=${{env.WITH_DLT_UNIT_TESTS}} \
+                                               -DBUILD_GMOCK=${{env.BUILD_GMOCK}}
 
     - name: Build
       # Build your program with the given configuration

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "googletest"]
+	path = googletest
+	url = https://github.com/google/googletest.git

CMakeLists.txt

@@ -334,7 +334,7 @@ if (WITH_DLT_UNIT_TESTS)
     find_package(GTest)
 
     if (NOT GTEST_FOUND)
-        add_subdirectory( gtest-1.7.0 )
+        add_subdirectory( googletest )
     endif()
     enable_testing()
     add_subdirectory(tests)