def test_size():
"""Test that ``size`` is correct."""
carb_3 = AtomSpec(6, 3)
carb_1 = AtomSpec(6, 1)
atoms = [carb_3, carb_1, carb_1, carb_3]
bonds = [
BondSpec(0, 1, BondOrder(1)),
BondSpec(1, 2, BondOrder(2), True),
BondSpec(2, 3, BondOrder(1)),
]
molecule = Molecule(atoms, bonds)
assert molecule.size() == 3
def test_size():
"""Test that ``size`` returns the correct result."""
molecule = Molecule([], [])
assert molecule.size() == 0
def test_size():
"""Test that methane's ``size`` is 0."""
molecule = Molecule([AtomSpec('C', 4)], [])
assert molecule.size() == 0