public void ChemicalFormulaGeneratorContainsFormula()
{
ChemicalFormulaGenerator generator = new ChemicalFormulaGenerator(new ChemicalFormula("H2O"));
List<ChemicalFormula> formulas = generator.AllFormulas().ToList();
ChemicalFormula ho = new ChemicalFormula("HO");
Assert.Contains(ho, formulas);
}