public virtual void TestContains_IIsotope() { IMolecularFormula mf = Builder.NewMolecularFormula(); IIsotope carb = Builder.NewIsotope("C"); IIsotope h1 = Builder.NewIsotope("H"); IIsotope h2 = Builder.NewIsotope("H"); h2.ExactMass = 2.0004; mf.Add(carb); mf.Add(h1); Assert.IsTrue(mf.Contains(carb)); Assert.IsTrue(mf.Contains(h1)); Assert.IsFalse(mf.Contains(h2)); }