conftest.py

import sys
import platform
is_pypy = 'PyPy' in sys.version
ver_tup = platform.python_version_tuple()[0:2]
ver_tup = tuple(int(i) for i in ver_tup)
import fluids, chemicals, thermo
import numpy
def pytest_ignore_collect(path):
    path = str(path)
    # Serious technical debt
    if path.endswith('chemical.py') or path.endswith('mixture.py')  or path.endswith('stream.py') or path.endswith('README.rst'):
        return True
    if 'benchmarks' in path:
        return True
    if ver_tup < (3, 7) or ver_tup >= (3, 11) or is_pypy:
        # numba does not yet run under pypy
        if 'numba' in path:
            return True
        if '.rst' in path: # skip .rst tests as different rendering from pint and no support for NUMBER flag
            return True
    if 'manual_runner' in path or 'make_test_stubs' in path or 'plot' in path or 'prerelease' in path or 'dump' in path:
        return True
    if sys.version[0] == '2':
        if 'numba' in path or 'typing_utils' in path:
            return True
        #if 'rst' in path:
        #    if platform.python_version_tuple()[0:2] != ('3', '7'):
        #        return True
        if 'test' not in path:
            return True
    if 'ipynb' in path and 'bench' in path:
        return True

def pytest_configure(config):
    import os
    #os._called_from_test = True
    
    if sys.version[0] == '3':
        import pytest
        if pytest.__version__.split('.')[0] >= '6':
            config.addinivalue_line("doctest_optionflags", "NUMBER")
        config.addinivalue_line("doctest_optionflags", "NORMALIZE_WHITESPACE")