@Test
public void cycleWheelTest() {

    IAtomContainer mol = AbstractSignatureTest.makeCycleWheel(3, 3);
    String expected = "[C]([C]([C]([C,2])[C,2])" + "[C]([C]([C,1])[C,1])" + "[C]([C]([C,0])[C,0]))";
    MoleculeSignature molSig = new MoleculeSignature(mol);
    String centralSignature = molSig.signatureStringForVertex(0);
    Assert.assertEquals(expected, centralSignature);
}