CMake using GTest doesn't work properly

I was trying to setup a CMake C++ project using googletest. I'm not realy experienced with CMake and used this guide to create my own setup.

When trying to build the project, the compiler throws errors:

.../test.cpp:12:5: error: ‘EXPECT_THAT’ was not declared in this scope EXPECT_THAT(a, ContainerEq(b)); ^~~~~~~~~~~ .../test.cpp:12:5: note: suggested alternative: ‘EXPECT_GT’ EXPECT_THAT(a, ContainerEq(b)); ^~~~~~~~~~~ EXPECT_GT ../test.cpp:13:31: error: ‘ContainerEq’ is not a member of ‘testing’ EXPECT_THAT(a, ::testing::ContainerEq(b)); // doesn't work either 

Parts of GTest seem to work fine though. If i comment out the second test, everything works.

Folder structure:

• CMakeLists.txt
• test/
  • CMakeLists.txt
  • gtest.cmake
  • test.cpp

Toplevel CMakeLists.txt

cmake_minimum_required (VERSION 3.8) project (TestProject) enable_testing() add_subdirectory(test) 

test/CMakeLists.txt

include(gtest.cmake) add_executable(UnitTests test.cpp) target_link_libraries(UnitTests libgtest) add_test(NAME AllUnitTests COMMAND UnitTests) 

test/gtest.cmake

find_package(Threads REQUIRED) # Enable ExternalProject CMake module include(ExternalProject) # Download and install GoogleTest ExternalProject_Add( gtest URL https://github.com/google/googletest/archive/master.zip PREFIX ${CMAKE_CURRENT_BINARY_DIR}/gtest # Disable install step INSTALL_COMMAND "" ) # Get GTest source and binary directories from CMake project ExternalProject_Get_Property(gtest source_dir binary_dir) # Create a libgtest target to be used as a dependency by test programs add_library(libgtest IMPORTED STATIC GLOBAL) add_dependencies(libgtest gtest) # Set libgtest properties set_target_properties(libgtest PROPERTIES "IMPORTED_LOCATION" "${binary_dir}/googlemock/gtest/libgtest.a" "IMPORTED_LINK_INTERFACE_LIBRARIES" "${CMAKE_THREAD_LIBS_INIT}" ) # Create a libgmock target to be used as a dependency by test programs add_library(libgmock IMPORTED STATIC GLOBAL) add_dependencies(libgmock gtest) # Set libgmock properties set_target_properties(libgmock PROPERTIES "IMPORTED_LOCATION" "${binary_dir}/googlemock/libgmock.a" "IMPORTED_LINK_INTERFACE_LIBRARIES" "${CMAKE_THREAD_LIBS_INIT}" ) # I couldn't make it work with INTERFACE_INCLUDE_DIRECTORIES include_directories("${source_dir}/googletest/include" "${source_dir}/googlemock/include") 

test/test.cpp

#include <vector> #include "gtest/gtest.h" TEST(SampleTest, Equal){ EXPECT_EQ(42, 42); } TEST(ContainerComparison, Equal){ const std::vector<int> a(2, 1); const std::vector<int> b(2, 1); EXPECT_THAT(a, ContainerEq(b)); EXPECT_THAT(a, ::testing::ContainerEq(b)); // doesn't work either } int main(int argc, char** argv){ ::testing::InitGoogleTest(&argc, argv); int ret = RUN_ALL_TESTS(); return ret; }