@Test
public void testClone() throws Exception {

    IsotopePattern spExp = new IsotopePattern();
    spExp.setMonoIsotope(new IsotopeContainer(156.07770, 1));
    spExp.addIsotope(new IsotopeContainer(157.07503, 0.0004));
    spExp.addIsotope(new IsotopeContainer(157.08059, 0.0003));
    spExp.addIsotope(new IsotopeContainer(158.08135, 0.002));
    spExp.setCharge(1);
    IsotopePattern clone = (IsotopePattern) spExp.clone();
    Assert.assertEquals(156.07770, clone.getMonoIsotope().getMass(), 0.001);
    Assert.assertEquals(156.07770, clone.getIsotopes().get(0).getMass(), 0.001);
    Assert.assertEquals(157.07503, clone.getIsotopes().get(1).getMass(), 0.001);
    Assert.assertEquals(157.08059, clone.getIsotopes().get(2).getMass(), 0.001);
    Assert.assertEquals(158.08135, clone.getIsotopes().get(3).getMass(), 0.001);
    Assert.assertEquals(1, clone.getMonoIsotope().getIntensity(), 0.001);
    Assert.assertEquals(1, clone.getIsotopes().get(0).getIntensity(), 0.001);
    Assert.assertEquals(0.0004, clone.getIsotopes().get(1).getIntensity(), 0.001);
    Assert.assertEquals(0.0003, clone.getIsotopes().get(2).getIntensity(), 0.001);
    Assert.assertEquals(0.002, clone.getIsotopes().get(3).getIntensity(), 0.001);
    Assert.assertEquals(1, clone.getCharge(), 0.001);
}