[CMake,PL] Renamed test definition CMake files to .cmake.

- reordered main cmake file
- adjusted dependencies via target_link_libraries according to
  cpp-dependencies-tool

ProcessLib/CMakeLists.txt

 include(${PROJECT_SOURCE_DIR}/scripts/cmake/OGSEnabledElements.cmake)
 
-# Source files
 APPEND_SOURCE_FILES(SOURCES)
-
-add_subdirectory(BoundaryCondition)
 APPEND_SOURCE_FILES(SOURCES BoundaryCondition)
-
+APPEND_SOURCE_FILES(SOURCES CalculateSurfaceFlux)
+APPEND_SOURCE_FILES(SOURCES ComponentTransport)
 APPEND_SOURCE_FILES(SOURCES Deformation)
-
-add_subdirectory(Parameter)
-APPEND_SOURCE_FILES(SOURCES Parameter)
-
-add_subdirectory(GroundwaterFlow)
 APPEND_SOURCE_FILES(SOURCES GroundwaterFlow)
-
-add_subdirectory(LiquidFlow)
-APPEND_SOURCE_FILES(SOURCES LiquidFlow)
-add_subdirectory(HydroMechanics)
+APPEND_SOURCE_FILES(SOURCES HeatConduction)
+APPEND_SOURCE_FILES(SOURCES HT)
 APPEND_SOURCE_FILES(SOURCES HydroMechanics)
-
-add_subdirectory(TwoPhaseFlowWithPP)
-APPEND_SOURCE_FILES(SOURCES TwoPhaseFlowWithPP)
-add_subdirectory(TwoPhaseFlowWithPrho)
-APPEND_SOURCE_FILES(SOURCES TwoPhaseFlowWithPrho)
-
-add_subdirectory(SmallDeformation)
-APPEND_SOURCE_FILES(SOURCES SmallDeformation)
-
-add_subdirectory(LIE/SmallDeformation)
-add_subdirectory(LIE/HydroMechanics)
 APPEND_SOURCE_FILES(SOURCES LIE/BoundaryCondition)
 APPEND_SOURCE_FILES(SOURCES LIE/Common)
 APPEND_SOURCE_FILES(SOURCES LIE/HydroMechanics)
 APPEND_SOURCE_FILES(SOURCES LIE/HydroMechanics/LocalAssembler)
 APPEND_SOURCE_FILES(SOURCES LIE/SmallDeformation)
 APPEND_SOURCE_FILES(SOURCES LIE/SmallDeformation/LocalAssembler)
-
-add_subdirectory(TES)
-APPEND_SOURCE_FILES(SOURCES TES)
-
-add_subdirectory(HeatConduction)
-APPEND_SOURCE_FILES(SOURCES HeatConduction)
-
-add_subdirectory(RichardsFlow)
+APPEND_SOURCE_FILES(SOURCES LiquidFlow)
+APPEND_SOURCE_FILES(SOURCES Parameter)
 APPEND_SOURCE_FILES(SOURCES RichardsFlow)
-
-add_subdirectory(ComponentTransport)
-APPEND_SOURCE_FILES(SOURCES ComponentTransport)
-
-add_subdirectory(HT)
-APPEND_SOURCE_FILES(SOURCES HT)
-
-add_subdirectory(CalculateSurfaceFlux)
-APPEND_SOURCE_FILES(SOURCES CalculateSurfaceFlux)
-
+APPEND_SOURCE_FILES(SOURCES SmallDeformation)
+APPEND_SOURCE_FILES(SOURCES TES)
+APPEND_SOURCE_FILES(SOURCES TwoPhaseFlowWithPP)
+APPEND_SOURCE_FILES(SOURCES TwoPhaseFlowWithPrho)
 APPEND_SOURCE_FILES(SOURCES Utils)
 
 add_library(ProcessLib ${SOURCES})
 
 target_link_libraries(ProcessLib
-    MaterialLib
-    MeshGeoToolsLib
-    MeshLib
-    NumLib # for shape matrices
+    PUBLIC BaseLib GeoLib MaterialLib MathLib MeshLib NumLib logog
+    PRIVATE MeshGeoToolsLib
 )
 
 ADD_VTK_DEPENDENCY(ProcessLib)
@@ -80,3 +46,18 @@ endif()
 if(OGS_USE_PCH)
     cotire(ProcessLib)
 endif()
+
+### Tests ###
+include(ComponentTransport/Tests.cmake)
+include(GroundwaterFlow/Tests.cmake)
+include(HeatConduction/Tests.cmake)
+include(HT/Tests.cmake)
+include(HydroMechanics/Tests.cmake)
+include(LIE/HydroMechanics/Tests.cmake)
+include(LIE/SmallDeformation/Tests.cmake)
+include(LiquidFlow/Tests.cmake)
+include(RichardsFlow/Tests.cmake)
+include(SmallDeformation/Tests.cmake)
+include(TES/Tests.cmake)
+include(TwoPhaseFlowWithPP/Tests.cmake)
+include(TwoPhaseFlowWithPrho/Tests.cmake)