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());
}