`RegressionMixin` deprecated in favor of `RegressionTestPlugin` in ReFrame 4.9.0

[boegel]

see also reframe-hpc/reframe#3581

[smoors]

it's just a name change, so we should probably keep the old name until the minimum ReFrame version is updated to >=4.9?

[boegel]

try:
    from ... import RegressionTestPlugin
except:
    from ... import RegressionMixin as RegressionTestPlugin

[laraPPr]

Tested it with 4.8.1 and it worked but couldn't test with 4.9.0 because other issues popped up with the sources of LAMMPS

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

[laraPPr]

WARNING: skipping test 'EESSI_LAMMPS_rhodo': file not found error: [Errno 2] No such file or directory: 'src/rhodo' (rerun with '-v' for a backtrace)

Traceback (most recent call last):

  File "/kyukon/scratch/gent/461/vsc46128/EESSI/venv_eessi_test-suite_accelgor_9/lib/python3.11/site-packages/reframe/core/decorators.py", line 105, in instantiate_all

    leaf_tests.append(test(*args, **kwargs))

                      ^^^^^^^^^^^^^^^^^^^^^

  File "/kyukon/scratch/gent/461/vsc46128/EESSI/venv_eessi_test-suite_accelgor_9/lib/python3.11/site-packages/reframe/core/meta.py", line 497, in __call__

    obj.__init__(*args, **kwargs)

  File "/kyukon/scratch/gent/461/vsc46128/EESSI/venv_eessi_test-suite_accelgor_9/lib/python3.11/site-packages/reframe/core/hooks.py", line 111, in _fn

    getattr(obj, h.__name__)()

  File "/kyukon/scratch/gent/461/vsc46128/EESSI/venv_eessi_test-suite_accelgor_9/lib/python3.11/site-packages/reframe/core/hooks.py", line 38, in _fn

    func(*args, **kwargs)

  File "/scratch/gent/461/vsc46128/EESSI/test-suite/eessi/testsuite/eessi_mixin.py", line 119, in mark_all_files_readonly

    self.readonly_files = os.listdir(self.sourcesdir)

[laraPPr]

I'll open anothe issue on the LAMMPS test