The NekUnitTests.py module contains the Nek5000 short (verification) tests, implemented using the Python standard-library unittests framework. The modules require Python 3.6 or higher.

Before running the tests, several environment variables may be optionally defined.

• NEK_SOURCE_ROOT: Points to the top-level Nek5000 repository (default: this repository).
• FC: The Fortran 77 compiler (default mpif77).
• CC: The C compiler (default: mpicc).
• PPLIST: List of pre-processor symbols (default: none)
• USR_LFLAGS: Linking flags (default: none)
• MPI=[0|1]: If 1, run tests with MPI. (default: 1)

Setting the following in your environment will affect the execution

• PARALLEL_PROCS: The number of processes to use when running with MPI (default: 4)
• LOG_ROOT: If defined, move complted logs into this directory. If not defined, leave logs in the case folders. (default: undefined)
• VERBOSE_TESTS=[true|false]: If true, display standard output from compiler and Nek5000 to terminal window. Standard output will always be recorded in logfiles, whether VERBOSE_TESTS is true or false. (default: false)

To run all the tests, first cd into this directory and then run: $ python3 -m unittest NekTests >log

If you wish to run tests for one short run e.g.: $ python3 -m unittest NekTests.Eddy_EddyUv.test_PnPn2_Parallel

or with pytest: $ pytest NekTests.py::LinCav_Dir