def test_metric_conversion_unit_converter_nan():
src_species = "CHCl3"
target_species = "CO2"
expected_warning = (
"No conversion from {} to {} available, nan will be returned "
"upon conversion".format(src_species, target_species))
with _unit_registry.context("AR4GWP100"):
with warnings.catch_warnings(record=True) as recorded_warnings:
UnitConverter(src_species, target_species)
assert len(recorded_warnings) == 1
assert str(recorded_warnings[0].message) == expected_warning
def test_conversion_without_offset():
uc = UnitConverter("kg", "t")
assert uc.source == "kg"
assert uc.target == "t"
np.testing.assert_allclose(uc.convert_from(1000), 1)
np.testing.assert_allclose(uc.convert_to(1), 1000)
def test_properties():
assert UnitConverter("CO2", "C").contexts
assert UnitConverter("CO2", "C").unit_registry
def test_metric_conversion_unit_converter_error():
with pytest.raises(DimensionalityError):
UnitConverter("kg SF5CF3 / yr", "kg CO2 / yr")
def test_metric_conversion_unit_converter_with_context():
uc = UnitConverter("kg SF5CF3 / yr", "kg CO2 / yr", context="AR4GWP100")
assert uc.convert_from(1) == 17700
assert uc.convert_to(1) == 1 / 17700
def test_conversion_incompatible_units():
with pytest.raises(DimensionalityError):
UnitConverter("kg", "degF")
def test_conversion_unknown_unit():
with pytest.raises(UndefinedUnitError):
UnitConverter("UNKOWN", "degF")
def test_conversion_with_offset():
uc = UnitConverter("degC", "degF")
np.testing.assert_allclose(uc.convert_from(1), 33.8)
np.testing.assert_allclose(uc.convert_to(1), -17.22222, rtol=1e-5)