I am trying to structure my project to include the production sources (in src
subfolder) and tests (in test
subfolder). I am using CMake to build this. As a minimal example I have the following files:
CMakeLists.txt:
cmake_minimum_required (VERSION 2.8)
project (TEST)
add_subdirectory (src)
add_subdirectory (test)
src/CMakeLists.txt:
add_executable (demo main.cpp sqr.cpp)
src/sqr.h
#ifndef SQR_H
#define SQR_H
double sqr(double);
#endif // SQR_H
src/sqr.cpp
#include "sqr.h"
double sqr(double x) { return x*x; }
src/main.cpp - uses sqr, doesn't really matter
test/CMakeLists.txt:
find_package(Boost COMPONENTS system filesystem unit_test_framework REQUIRED)
include_directories (${TEST_SOURCE_DIR}/src)
ADD_DEFINITIONS(-DBOOST_TEST_DYN_LINK)
add_executable (test test.cpp ${TEST_SOURCE_DIR}/src/sqr.cpp)
target_link_libraries(test
${Boost_FILESYSTEM_LIBRARY}
${Boost_SYSTEM_LIBRARY}
${Boost_UNIT_TEST_FRAMEWORK_LIBRARY}
)
enable_testing()
add_test(MyTest test)
test/test.cpp:
#define BOOST_TEST_MODULE SqrTests
#include <boost/test/unit_test.hpp>
#include "sqr.h"
BOOST_AUTO_TEST_CASE(FailTest)
{
BOOST_CHECK_EQUAL(5, sqr(2));
}
BOOST_AUTO_TEST_CASE(PassTest)
{
BOOST_CHECK_EQUAL(4, sqr(2));
}
A few questions:
src
folder in the test/CMakeLists.txt
file. If this was a library project, I would just link the library. Is there a way to avoid listing all the cpp files from the other project?enable_testing()
and add_test(MyTest test)
doing? I haven't seen any effect. How can I run the tests from CMake (or CTest)?cmake .
in the root folder, but this created a mess with temporary files everywhere. How can I get the compilation results in a reasonable structure?For questions 1 & 2, I would recommend making a library from your non-test files excluding main.cpp (in this case just src/sqr.cpp and src/sqr.h), and then you can avoid listing (and more importantly re-compiling) all the sources twice.
For question 3, these commands add a test called "MyTest" which invokes your executable "test" without any arguments. However, since you've added these commands to test/CMakeLists.txt and not your top-level CMakeLists.txt, you can only invoke the test from within the "test" subdirectory of your build tree (try cd test && ctest -N
). If you want the test to be runnable from your top-level build directory, you'd need to call add_test
from the top-level CMakeLists.txt. This also means you have to use the more verbose form of add_test
since your test exe isn't defined in the same CMakeLists.txt
In your case, since you're running cmake in the root folder, your build tree and your source tree are one and the same. This is known as an in-source build and isn't ideal, which leads to question 4.
The preferred method for generating the build tree is to do an out-of-source build, i.e. create a directory somewhere outside of your source tree and execute cmake from there. Even creating a "build" directory in the root of your project and executing cmake ..
would provide a clean structure which won't interfere with your source tree.
One final point is to avoid calling executables "test" (case-sensitive). For reasons why, see this answer.
To achieve these changes, I'd do the following:
CMakeLists.txt:
cmake_minimum_required (VERSION 2.8)
project (TEST)
add_subdirectory (src)
add_subdirectory (test)
enable_testing ()
add_test (NAME MyTest COMMAND Test)
src/CMakeLists.txt:
add_library (Sqr sqr.cpp sqr.h)
add_executable (demo main.cpp)
target_link_libraries (demo Sqr)
test/CMakeLists.txt:
find_package (Boost COMPONENTS system filesystem unit_test_framework REQUIRED)
include_directories (${TEST_SOURCE_DIR}/src
${Boost_INCLUDE_DIRS}
)
add_definitions (-DBOOST_TEST_DYN_LINK)
add_executable (Test test.cpp)
target_link_libraries (Test
Sqr
${Boost_FILESYSTEM_LIBRARY}
${Boost_SYSTEM_LIBRARY}
${Boost_UNIT_TEST_FRAMEWORK_LIBRARY}
)