public void TestParseModParts()
{
var bioMassCalc = new BioMassCalc(MassType.Monoisotopic);
CollectionAssert.AreEqual(new[] { "C'2", "" }, SequenceMassCalc.ParseModParts(bioMassCalc, "C'2"));
CollectionAssert.AreEqual(new[] { "", "C2" }, SequenceMassCalc.ParseModParts(bioMassCalc, "-C2"));
CollectionAssert.AreEqual(new[] { "C'2", "C2" }, SequenceMassCalc.ParseModParts(bioMassCalc, "C'2-C2"));
}