public void TestRemoveEpsilonProductions()
{
CFG grammar2Transformed = grammar2.RemoveEpsilonProductions();
CFG expectedresult = CFGBuilder.Start("a")
.Derive("a").ToEpsilon()
.Derive("a").To("c", "d")
.Derive("a").To("d")
.Derive("c").To("d")
.Build();
Assert.AreEqual(expectedresult, grammar2Transformed);
}