public void RemoveNullablesTest() { var dict = new Dictionary <string, List <RHS> >(); dict.Add("S", new List <RHS> { new RHS('a', new List <string> { "M", "B" }) }); dict.Add("M", new List <RHS> { new RHS('a', new List <string> { "M", "B" }), new RHS('_') }); dict.Add("B", new List <RHS> { new RHS('b') }); var cfg = new CFG("S", dict); Assert.AreEqual("S->aMB|aB\nM->aMB|aB\nB->b\n", cfg.RemoveNullables().ToString()); }