def test_selection():
Mol = Molecule()
Mol.newAtom('C', (0, 0, 0))
Mol.addSelection([1, (0, 0, 0)])
Mol.addSelection([1, (1, 0, 0)])
assert Mol.getSelection() == [[1, (0, 0, 0)], [1, (1, 0, 0)]]
Mol.addSelection([1, (1, 0, 0)])
assert Mol.getSelection() == [[1, (0, 0, 0)]]
Mol.delSelection()
assert Mol.getSelection() == []
