def METHOD_NAME(self):
    """Function run before each test in this class."""
    self.test_mols = [
        Molecule().from_smiles("C"),
        Molecule().from_smiles("O"),
        Molecule().from_smiles("N"),
        Molecule().from_smiles("S"),
        Molecule().from_smiles("[CH2]C"),
        Molecule().from_smiles("[CH]C"),
        Molecule().from_smiles("C=CC=C"),
        Molecule().from_smiles("C#C[CH2]"),
        Molecule().from_smiles("c1ccccc1"),
        Molecule().from_smiles("[13CH3]C"),
        Molecule().from_smiles("O=CCO").generate_h_bonded_structures()[0],
    ]
    self.test_Hbond_free_mol = Molecule().from_smiles("O=CCO")