\label{sec:testing}
The Quality Assurance (QA) tests are designed to test most of
the functionality of NWChem.  As such, it is useful to run at least
some of the tests when first installing NWChem at a site.  It is
imperative to run these tests when porting to a new platform.

The directions given below for running the tests are for systems without
a batch system.  If you have a batch system, check out the contrib
directory to see if there is an appropriate batch submission script.
You will then need to run each of the tests seperately and check the
results (the nwparse.pl script can be used for the quantum (QM) and pspw 
tests for this purpose).

Here are some steps and notes on running the QA tests:

\begin{enumerate}
\item Set the environment variable \verb+NWCHEM_EXECUTABLE+ to the executable
   you want to use, e.g.
\begin{verbatim}
   % setenv NWCHEM_EXECUTABLE \
     $NWCHEM_TOP/bin/${NWCHEM_TARGET}_${NWCHEM_TARGET_CPU}/nwchem
\end{verbatim}

\item If you compiled without MPI (this is the default way to build NWChem),
   you will need to:
\begin{enumerate}
   \item Set the environment variable \verb+PARALLEL_PATH+ to the 
      location of the parallel program, e.g.
   \begin{verbatim}
   % setenv PARALLEL_PATH \
     $NWCHEM_TOP/bin/${NWCHEM_TARGET}_${NWCHEM_TARGET_CPU}/parallel
   \end{verbatim}
   \item Run the QM tests sequentially using the doqmtests script.  Note
      that you may want to comment out the largest tests at the bottom
      of the doqmtests file on slower machines or machines without much
      memory.
   \begin{verbatim}
   % doqmtests >& doqmtests.log &
   \end{verbatim}
   \item Check the doqmtests.log file for potential problems.  While running,
      the test scripts place files in the \verb+$NWCHEM_TOP+/QA/testoutputs
      directory.  You may wish to clean out this directory after checking
      that everything is working.  If a job did not work, the output can
      be found in the \verb+$NWCHEM_TOP+/QA/testoutputs directory.  If the problem
      seems significant and/or you are unsure whether NWChem performed the
      calculation correctly, please send a message to 
      nwchem-support@emsl.pnl.gov
      with details about your computer, the environment variables that were
      set when you compiled NWChem, and the output of the calculation that
      you are concerned about.
   \item Run the QM tests in parallel by editing the doqmtests script so that
      \verb+"procs #"+ is placed after the runtests.unix commands (substituting
      in the number of processors that you want to use for \verb+#+). E.g.
   \begin{verbatim}
   runtests.unix procs 2 h2o_dk u_sodft cosmo_h2o ch5n_nbo h2s_finite
   \end{verbatim}
   \item Again check the log for potential problems.
   \item Run most of the molecular dynamics (MD) tests using the runtest.md
      script.  Note that this script assumes that you have a /tmp directory
      and that you want to use 2 processes.  Both of these may be changed.
   \begin{verbatim}
   % runtest.md >& runtest.md.log &
   \end{verbatim}
   \item Check the log (runtest.md.log) for potential problems.
   \end{enumerate}

\item If you compiled with MPI, you will need to
   \begin{enumerate}
   \item Set the environment variable \verb+MPIRUN_PATH+ to the location of mpirun
      if it is not in your path, e.g.
   \begin{verbatim}
   % setenv MPIRUN_PATH /usr/local/bin/mpirun
   \end{verbatim}
   \item If the mpirun processor definition option is not -np, you will need
      to set the environment varibale \verb+MPIRUN_NPOPT+ to the appropriate
      flag, e.g.
   \begin{verbatim}
   % setenv MPIRUN_NPOPT -n
   \end{verbatim}
   \item Run the doqmtests and runtest.md scripts as described above, but first
      edit those files to substitute "runtests.mpi.unix" for "runtests.unix"
      and "runtest.unix"
   \item Check the log for potential problems.
   \end{enumerate}
\end{enumerate}