public virtual void TestOneReqAndSomeOptional()
{
/* one required, some optional */
BooleanQuery q = new BooleanQuery();
q.Add(new TermQuery(new Term("all", "all")), BooleanClause.Occur.MUST); //true, false);
q.Add(new TermQuery(new Term("data", "5")), BooleanClause.Occur.SHOULD); //false, false);
q.Add(new TermQuery(new Term("data", "4")), BooleanClause.Occur.SHOULD); //false, false);
q.Add(new TermQuery(new Term("data", "3")), BooleanClause.Occur.SHOULD); //false, false);
q.MinimumNumberShouldMatch = 2; // 2 of 3 optional
VerifyNrHits(q, 5);
}