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"""This test cross-checks our implementation of CODATA against the
implementation that SciPy brings with it.
"""
import pytest
import ase.units
from ase.units import create_units
def test_create_units():
"""Check that units are created and allow attribute access."""
# just use current CODATA version
new_units = ase.units.create_units(ase.units.__codata_version__)
assert new_units.eV == new_units['eV'] == ase.units.eV
for unit_name in new_units:
assert getattr(new_units, unit_name) == getattr(ase.units, unit_name)
assert new_units[unit_name] == getattr(ase.units, unit_name)
def test_bad_codata():
name = 'my_bad_codata_version'
with pytest.raises(NotImplementedError, match=name):
create_units(name)
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