@Test
public void testGetHashMapBySingleCharCode() {

    Map<String, IAminoAcid> map = AminoAcids.getHashMapBySingleCharCode();
    Assert.assertNotNull(map);
    Assert.assertEquals(20, map.size());
    String[] aas = {"G", "A", "V", "L"};
    for (String aa1 : aas) {
        AminoAcid aa = (AminoAcid) map.get(aa1);
        Assert.assertNotNull("Did not find AA for: " + aa1, aa);
    }
}