Add unit tests for all expression tree functions.

Author: kblaschke

tests/CMakeLists.txt

@@ -10,18 +10,12 @@ add_executable(projectM_EvalLib_Test
         TreeFunctionsTest.cpp
         )
 
-
 target_link_libraries(projectM_EvalLib_Test
         PRIVATE
         projectM::Eval
         GTest::gtest_main
         )
 
-target_include_directories(projectM_EvalLib_Test
-        PRIVATE
-        ${CMAKE_SOURCE_DIR}/SimpleCompiler
-        )
-
 target_compile_definitions(projectM_EvalLib_Test
         PRIVATE
         PROJECTM_TEST_DATA_DIR="${CMAKE_CURRENT_LIST_DIR}/data"