[CMake] WORKING_DIRECTORY problem: custom targets vs. "testing"

[Stefan]

Hi,

I'm not sure, if I am doing something wrong, so I made a small example program + cmake script to show the difference between the working_directory option in custom targets and the testing option.

My folder structure is very simple:

./file.txt (fill it with one simple text line)
./reader.hpp (a small c++ class for reading the content of file.txt
./main.cpp (main class for calling the reader.hpp to read the content
./main_test.cpp (boot unit test, fails, when the file is empty or does not exist)


reader.hpp:

#include <fstream>

struct reader {
	static inline std::string get_content() {
		std::ifstream input_fs("file.txt");
		std::string content;
		std::getline(input_fs, content);
		return content;
	}
};

main.cpp:

#include "reader.hpp"
#include <iostream>

auto main() -> int {
	std::cout << reader::get_content() << std::endl;
	return 0;
}

main_test.cpp:

#define BOOST_TEST_DYN_LINK
#define BOOST_TEST_MODULE abbreviation_test

#include <boost/test/unit_test.hpp>
#include "reader.hpp"

BOOST_AUTO_TEST_CASE(read_file_content)
{
	std::string content = reader::get_content();
	bool has_content = content.length() > 0;
	BOOST_CHECK_EQUAL(has_content, true);
}


And my cmake script:


cmake_minimum_required (VERSION 2.6)
project (workingdir)

find_package(Boost 1.44.0 COMPONENTS unit_test_framework REQUIRED)

add_definitions("-Wall -std=c++0x")

set(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin)
set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib)

include_directories("${PROJECT_SOURCE_DIR}")
include_directories("${PROJECT_BINARY_DIR}")

add_executable (workingdir main.cpp)
target_link_libraries(workingdir)

add_executable(workingdir_test main_test.cpp)
target_link_libraries(workingdir_test ${Boost_LIBRARIES})

add_custom_target (
  run0
  DEPENDS workingdir_test
  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
  COMMAND workingdir_test
)

enable_testing()

add_test (
  Workingdir_test  ${EXECUTABLE_OUTPUT_PATH}/workingdir_test
  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
)



To test it: 

mkdir build && cd build
cmake ..
make

Now I could run the custom target with "make run0" -> it will show the "file.txt" content, because I set the working directory to the project source dir.

But: When I try to run "make test" -> although I set the working directory, the test will fail. I guess the working directory is ./build and not ./


How can I set the working directory to ${PROJECT_SOURCE_DIR} correctly for my testcases?


Thanks in advance + regards,


Stefan

PS: I am using cmake version 2.8.12.1 on Arch.