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"""
pytest configuration to silently discard test items with invalid parameter combinations
See: https://github.com/pytest-dev/pytest/issues/3730#issuecomment-567142496
"""
def pytest_configure(config):
config.addinivalue_line("markers", "deselect_if(func): function to deselect tests from parametrization")
def pytest_collection_modifyitems(config, items):
removed = []
kept = []
for item in items:
m = item.get_closest_marker("deselect_if")
if m:
func = m.kwargs["func"]
if func(**item.callspec.params):
removed.append(item)
continue
kept.append(item)
if removed:
config.hook.pytest_deselected(items=removed)
items[:] = kept
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