When called from a fixture, this menu additionally includes SetUp Method and TearDown Method: Google Test run/debug configurationĪlthough Google Test provides the main() entry, and you can run tests as regular applications, we recommend using the dedicated Google Test run/debug configuration. In the files with gtest included, you can generate code for tests and test fixtures using the Generate menu Alt+Insert. Take a look at this example in Unit Testing Tutorial. When writing tests, make sure to add #include "gtest/gtest.h" at the beginning of every. In your root CMakeLists.txt script, add the add_subdirectory(Google_tests) command to the end, then reload the project. Target_link_libraries(Google_Tests_run gtest gtest_main) # 'test1.cpp tests2.cpp' are source files with testsĪdd_executable(Google_Tests_run test1.cpp tests2.cpp) See my other post on symbol visibility if you want to dive deeper into this topic.# 'lib' is the folder with Google Test sources Both GCC and Clang support this syntax.Īs a side note, with modern CMake versions > 3.0.2, you can auto generate a cross platform export definition using GenerateExportHeader 2 This is done by specifying _attribute_ ((visibility ("default")))įor the symbol in question. If you are hiding ELF symbols by default (which you should), this method has the drawback that symbols from private_impl.h you are testing need to be marked as exported, so the linker can find them when linking. Symbol Visibility (-fvisibility=hidden) 1 We furthermore explicitly express the link dependency between our and the corresponding. This way, we make sure that we use the content of private_impl.cpp in the right context. Get_target_property (private_link_libraries LINK_LIBRARIES) Get_target_property (private_include_dirs INCLUDE_DIRECTORIES) This can be done using CMakes property system, i.e., we can get the necessary properties from and reuse them for : add_executable( test.t.cpp) We simply need to access this information within our test environment. We can explicitly model the depency on the private implementation of, since we already specify all required information within the top level CMakeLists.txt. With the “patch” from before we now test private_impl.cpp in another context than it is normally used in. Second, oftentimes there exists some logic (within CMake or otherwise) that sets context (like macros) depending on the current component.First, the implementation in src/private_impl.cpp is used outside the original component, e.g., link dependencies may no longer be satisfied.This is a bad solution for several reasons. I have seen people do things, like including the relevant source file in their sources. When writing tests in test/test.t.cpp, how can we access private implementations from the private_include directory? The “pitfall” solution Target_include_directories ( PRIVATE include)Īnd the test/CMakeLists.txt like this: add_executable( test.t.cpp) Where the top-level CMakeLists.txt could look something like this: add_library( SHARED src/src.cpp src/private_impl.cpp) Consider a small example project with the following folder structure: When writing C++ code, I often find myself wanting to write tests for private implementation files.
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