Add googletest in thirdparty.

Signed-off-by: Henner Zeller <[email protected]>

.gitmodules

@@ -1,4 +1,7 @@
 [submodule "third_party/capnproto"]
 	path = third_party/capnproto
 	url = https://github.com/capnproto/capnproto.git
-
+
+[submodule "third_party/googletest"]
+	path = third_party/googletest
+	url = https://github.com/google/googletest.git

CMakeLists.txt

@@ -35,6 +35,7 @@ message(STATUS "Python3_EXECUTABLE = ${Python3_EXECUTABLE}")
 
 set(BUILD_TESTING OFF CACHE BOOL "Don't build capnproto tests")
 add_subdirectory(third_party/capnproto EXCLUDE_FROM_ALL)
+add_subdirectory(third_party/googletest EXCLUDE_FROM_ALL)
 
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
@@ -229,6 +230,7 @@ add_dependencies(GenerateCode capnpc capnp_tool capnpc_cpp)
 
 if (UHDM_BUILD_TESTS)
   enable_testing()
+  include(GoogleTest)
   # All unit-tests are registered with this custom target as dependency, so
   # just `make UnitTests` will build them all.
   add_custom_target(UnitTests)
@@ -240,11 +242,14 @@ if (UHDM_BUILD_TESTS)
       get_filename_component(test_prefix ${test_cc_file} DIRECTORY)
 
       add_executable(${test_bin} ${PROJECT_SOURCE_DIR}/${test_cc_file})
-      target_link_libraries(${test_bin} PRIVATE uhdm)
+      target_include_directories(${test_bin} PRIVATE
+        third_party/googletest/googletest/include
+        third_party/googletest/googlemock/include)
+      target_link_libraries(${test_bin} PRIVATE uhdm gtest gmock gtest_main)
       add_test(
         NAME ${test_prefix}/${test_bin} COMMAND ${test_bin}
         WORKING_DIRECTORY "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}")
-
+      #gtest_add_tests(TARGET ${test_cc_file})
       # Now, add this binary to our UnitTests target that it builds this
       add_dependencies(UnitTests ${test_bin})
     endforeach()