def test_error_if_lattice_parameter_missing_from_dict(self):
lattice_parameters = {"a_star": 0.2314, "c_star": 0.0588,
"alpha_star": 90, "beta_star": 90, "gamma_star": 60}
with pytest.raises(ValueError) as exception_info:
ReciprocalLattice.from_dict(lattice_parameters)
assert str(exception_info.value) == "Parameter: 'b_star' missing from input dictionary"
def test_can_create_crystal_from_dictionary(self):
lattice_parameters = {"a_star": 0.2314, "b_star": 0.2314, "c_star": 0.0588,
"alpha_star": 90, "beta_star": 90, "gamma_star": 60}
lattice = ReciprocalLattice.from_dict(lattice_parameters)
assert lattice.lattice_parameters == CALCITE_RECIPROCAL_LATTICE_PARAMETERS
