@Test
public void testCalculateIsotopesMn() {

    IMolecularFormula molFor = new MolecularFormula();
    molFor.addIsotope(builder.newInstance(IIsotope.class, "Mn"), 1);
    IsotopePatternGenerator isotopeGe = new IsotopePatternGenerator(0.001);
    IsotopePattern isoPattern = isotopeGe.getIsotopes(molFor);
    Assert.assertEquals(1, isoPattern.getNumberOfIsotopes());
}