Use again absolute paths for tests

Author: Lauris Kaplinski

test/CMakeLists.txt

@@ -3,14 +3,18 @@ add_executable(unittests
     ../cdoc/CDocCipher.cpp
     ../cdoc/Crypto.cpp)
 
+target_compile_definitions(unittests PRIVATE
+    DATA_DIR="${CMAKE_CURRENT_SOURCE_DIR}/data"
+)
+
 target_link_libraries(unittests
     OpenSSL::SSL
     cdoc
     Boost::unit_test_framework)
 
 add_test(NAME runtest
     COMMAND ${CMAKE_CURRENT_BINARY_DIR}/unittests --build_info=YES --logger=HRF,all,stdout
-    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/test
+    WORKING_DIRECTORY $<TARGET_FILE_DIR:cdoc>
 )
 
 add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} DEPENDS unittests)