public void testDPLLFiltersClausesTheStatusOfWhichAreKnown()
{
Model model = new Model();
model = model.extend(new Symbol("A"), true).extend(new Symbol("B"),
true);
Sentence sentence = (Sentence)parser
.parse("((A AND B) AND (B AND C))");
List<Sentence> clauseList = new CNFClauseGatherer()
.getClausesFrom(new CNFTransformer()
.transform(sentence));
List<Sentence> clausesWithNonTrueValues = dpll
.clausesWithNonTrueValues(clauseList, model);
Assert.AreEqual(1, clausesWithNonTrueValues.Count);
Sentence nonTrueClause = (Sentence)parser.parse("(B AND C)");
clausesWithNonTrueValues.Contains(nonTrueClause);
}