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Google's C++ Test Framework has two output libraries: one is gtest.lib and the other one is gtest_main.lib. According to Nik Reiman's answer on how to setup gtest with Visual Studio, we should link to gtest_main.lib but I'm linking to gtest.lib and the sample test cases that I have are running fine.
What's the difference between the two libraries and does it matter which one I link to?
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It includes a trivial main method that will launch the registered tests, something like this (as of 1.8): GTEST_API_ int main(int argc, char **argv) { printf("Running main() from gtest_main.cc\n"); testing::InitGoogleTest(&argc, argv); return RUN_ALL_TESTS(); }
h. The directory that contains gtest is not in your list of include search paths. gtest/gtest. h is working only because it's relative to the current file. You need to add the path that contains the directory gtest to your list of include search paths.
the only reasonable difference is that gtest_main.lib provides a default implementation of a test application entry point (i.e. main function):
Citation from Getting started with Google C++ Testing Framework:
"[...] maybe you think that writing all those main() functions is too much work? We agree with you completely and that's why Google Test provides a basic implementation of main(). If it fits your needs, then just link your test with gtest_main library and you are good to go."
If you want to write your main function yourself - you should link with gtest.lib.
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