@Test
public void testIsotopic() {

    AtomHashGenerator generator = new HashGeneratorMaker().depth(0).isotopic().atomic();
    List<AtomEncoder> encoders = getEncoders((BasicAtomHashGenerator) generator);
    org.hamcrest.MatcherAssert.assertThat(encoders.size(), is(1));
    org.hamcrest.MatcherAssert.assertThat(encoders.get(0), is((AtomEncoder) MASS_NUMBER));
}