added unit test for Oxygen chemistry module

build/Makefile

@@ -531,7 +531,8 @@ SOURCES= physcon.f90 ${CONFIG} ${SRCKERNEL} io.F90 units.f90 \
          centreofmass.f90 ${SRCPOT} checkconserved.f90 \
          utils_filenames.f90 utils_summary.F90 ${SRCCHEM} ${SRCDUST} \
          mpi_memory.f90 mpi_derivs.F90 mpi_tree.F90 kdtree.F90 linklist_kdtree.F90 utils_healpix.f90 utils_raytracer.f90 \
-         partinject.F90 utils_inject.f90 dust_formation.f90 ptmass_radiation.f90 ptmass_heating.f90 \
+         partinject.F90 utils_inject.f90 chemistry.f90 dust_formation.f90 \
+         ptmass_radiation.f90 ptmass_heating.f90 \
          utils_deriv.f90 utils_implicit.f90 radiation_implicit.f90 ${SRCTURB} \
          ${SRCINJECT_DEPS} wind_equations.f90 wind.F90  \
          ${SRCKROME} memory.f90 ${SRCREADWRITE_DUMPS} ${SRCINJECT}  \
@@ -684,7 +685,8 @@ endif
 SRCTESTS=utils_testsuite.f90 ${TEST_FASTMATH} test_kernel.f90 \
          test_dust.f90 test_growth.f90 test_smol.F90 \
          test_nonidealmhd.F90 directsum.f90 test_gravity.f90 \
-         test_derivs.F90 test_cooling.f90 test_eos_stratified.f90 \
+         test_derivs.F90 test_chemistry.f90 \
+         test_cooling.f90 test_eos_stratified.f90 \
          test_eos.f90 test_externf.f90 test_rwdump.f90 \
          test_step.F90 test_indtstep.F90 set_disc.F90 test_setdisc.F90 \
          test_hierarchical.f90 test_damping.f90 test_wind.f90 test_iorig.f90 \