def test_set_calib(self):
"""
Test to prevent setting a calibration factor of 0
"""
x = Stats()
# this should work
x.update({'calib': 1.23})
assert x.calib, 1.23
# this raises UserWarning
with warnings.catch_warnings(record=True):
warnings.simplefilter('error', UserWarning)
# 1
with pytest.raises(UserWarning):
x.__setitem__('calib', 0)
# 2
with pytest.raises(UserWarning):
x.update({'calib': 0})
# calib value should nevertheless be set to 0
assert x.calib, 0
