def test_class_method(self):
template = PotentialTemplateLibrary()['HarmonicBondPotential']
params = {'k': 1.0 * u.dimensionless, 'r_eq': 1.0 * u.dimensionless}
harmonic_potential_from_template = Potential.from_template(
template, params)
harmonic_potential = Potential(name='HarmonicBondPotential',
expression='0.5 * k * (r-r_eq)**2',
independent_variables={'r'},
parameters=params,
template=False)
assert harmonic_potential.name == harmonic_potential_from_template.name
assert harmonic_potential.expression == harmonic_potential_from_template.expression
assert harmonic_potential.independent_variables == harmonic_potential_from_template.independent_variables
def test_class_method_with_error(self):
template = object()
with pytest.raises(GMSOError):
Potential.from_template(template, parameters=None)