Separate test cases across multiple files in google test

Question

I'm new in google test C++ framework. It's quite easy to use but I'm wondering how to separate the cases into multiple test files. What is the best way?

Include the .cpp files directly is an option. Using a header seems that does nothing...

Any help is welcome

Answer 1

Create one file that contains just the main to run the tests.

// AllTests.cpp #include "gtest/gtest.h"  int main(int argc, char **argv) {     testing::InitGoogleTest(&argc, argv);     return RUN_ALL_TESTS(); } 

Then put the tests into other files. You can put as many tests as you like in a file. Creating one file per class or per source file can work well.

// SubtractTest.cpp #include "subtract.h" #include "gtest/gtest.h"  TEST(SubtractTest, SubtractTwoNumbers) {     EXPECT_EQ(5, subtract(6, 1)); } 

This does require that all tests can share the same main. If you have to do something special there, you will have to have multiple build targets.

Answer 2

Not looking for credits or points. I'm new to stackoverflow and don't have the the reputation to add comments. @jkoendev's answer despite being technically correct makes an incorrect statement "I think the main missing point in the other answer is that you need to #include the test files." Not true, you just need to link all the CPP files together.

For example in CMAKE

add_executable(${PROJECT_NAME}      ${sources}     ${headers}) 

along with a

file(GLOB_RECURSE sources     ${CMAKE_CURRENT_SOURCE_DIR}/*.cpp) 

links all the cpp files. You don't need to include any of the test files in the main file.