How to run all gtest files at once using cmake?

Question

I have several .cpp files that contain tests for different classes and look like this: ``` #include <gtest/gtest.h> namespace { //lots of tests } int main(int argc, char** argv) { ::testing::InitGoogleTest(&argc, argv); return RUN_ALL_TESTS(); } ``` and a CMakeLists.txt file that looks like this: ``` add_subdirectory(/usr/src/gtest gtest) include_directories(${GTEST_INCLUDE_DIR}) add_executable(TestA TestA.cpp) target_link_libraries(TestA gtest ) add_executable(TestB TestB.cpp) target_link_libraries(TestB gtest ) add_executable(TestC TestC.cpp) target_link_libraries(TestC gtest ) ``` I like this setup because it's handy to run just the tests for the component I am currently working on. Executing one Test file is obviously much faster than executing all of them. However, every now and then I want to run all tests. How can I achieve this easily within my setup?

Accepted Answer

You can use CTest (it's usually installed along with CMake) to achieve this.

First, you need to `include` the CTest module in your CMakeLists.txt, then you just need to use the `add_test` command for each of your test executables:

```
include(CTest)
add_subdirectory(/usr/src/gtest gtest)
include_directories(${GTEST_INCLUDE_DIR})

add_executable(TestA TestA.cpp)
target_link_libraries(TestA gtest)
add_test(NAME AllTestsInA COMMAND TestA)

add_executable(TestB TestB.cpp)
target_link_libraries(TestB gtest)
add_test(NAME AllTestsInB COMMAND TestB)

add_executable(TestC TestC.cpp)
target_link_libraries(TestC gtest)
add_test(NAME AllTestsInC COMMAND TestC)
```

Now, once your test exes are built, from your build folder you can execute CTest to run all the tests. E.g. to run the Debug tests:

```
ctest -C Debug
```

or to get more verbose output:

```
ctest -C Debug -V
```

How to run all gtest files at once using cmake?

Solution

Problem