Automatic test fails when calling pyvisa-sim

[Arkh42]

Example:

build (ubuntu-18.04, 3.8)

Run pytest --cov --cov-report=term --cov-report=html
  pytest --cov --cov-report=term --cov-report=html
  shell: /bin/bash -e {0}
  env:
    pythonLocation: /opt/hostedtoolcache/Python/3.8.5/x64
============================= test session starts ==============================
platform linux -- Python 3.8.5, pytest-6.1.1, py-1.9.0, pluggy-0.13.1
rootdir: /home/runner/work/rtestbench/rtestbench, configfile: pytest.ini
plugins: cov-2.10.1
collected 72 items

rtestbench/tests/test_chat.py ......                                     [  8%]
rtestbench/tests/test_core.py ...................EEEEEEE..EEEEEEEEEEEE.F [ 66%]
EFFEEE..                                                                 [ 77%]
rtestbench/tests/test_electrometer.py ..                                 [ 80%]
rtestbench/tests/test_factories.py ..                                    [ 83%]
rtestbench/tests/test_keysight_electrometers.py ..s                      [ 87%]
rtestbench/tests/test_logger.py ...                                      [ 91%]
rtestbench/tests/test_meta.py ......                                     [100%]

============================
            Bye!            
============================



==================================== ERRORS ====================================
________________ ERROR at setup of test_toolFactory_attributes _________________

    @pytest.fixture
    def toolFactory():
        """Returns a ToolFactory object with pyvisa-sim to enable a simulated resource."""
    
>       manager = visa.ResourceManager(visa_library='@sim')

rtestbench/tests/test_core.py:41: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/opt/hostedtoolcache/Python/3.8.5/x64/lib/python3.8/site-packages/pyvisa/highlevel.py:3015: in __new__
    visa_library = open_visa_library(visa_library)
/opt/hostedtoolcache/Python/3.8.5/x64/lib/python3.8/site-packages/pyvisa/highlevel.py:2929: in open_visa_library
    return cls(argument)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

cls = <class 'pyvisa-sim.highlevel.SimVisaLibrary'>, library_path = ''

    def __new__(
        cls: Type[T], library_path: Union[str, LibraryPath] = ""
    ) -> "VisaLibraryBase":
        """Create a new VISA library from the specified path.
    
        If a library was already created using the same path and class this
        library object is returned instead.
    
        Parameters
        ----------
        library_path : str | LibraryPath
            Path to the VISA library to use in the backend.
    
        Raises
        ------
        OSError
            Raised if the VISA library object could not be created.
    
        """
        if library_path == "":
            errs = []
            for path in cls.get_library_paths():
                try:
                    return cls(path)
                except OSError as e:
                    logger.debug("Could not open VISA library %s: %s", path, str(e))
                    errs.append(str(e))
                except Exception as e:
                    errs.append(str(e))
            else:
>               raise OSError("Could not open VISA library:\n" + "\n".join(errs))
E               OSError: Could not open VISA library:

/opt/hostedtoolcache/Python/3.8.5/x64/lib/python3.8/site-packages/pyvisa/highlevel.py:175: OSError

[Arkh42]

Found in the documentation of PyVISA on PyPI:

1.11 (16-09-2020)

PyVISA 1.11 introduces a small backward incompatibility in the handling of the arguments to handlers for VISA events.

[Arkh42]

Issue opened on pyvisa: see issue #553.

[Arkh42]

Check discussion in pyvisa/pyvisa-sim#53.

[Arkh42]

Seems to be fixed by https://github.com/pyvisa/pyvisa-sim/tree/drop-py2. Waiting for a proper release of pyvisa-sim to put in the requirements file to close the issue.

[Arkh42]

Everything works with the release 0.4 of pyvisa-sim!