public virtual void TestNoOptionalButMin2()
{
/* one required, no optional */
BooleanQuery q = new BooleanQuery();
q.Add(new TermQuery(new Term("all", "all")), BooleanClause.Occur.MUST); //true, false);
q.MinimumNumberShouldMatch = 1; // 1 of 0 optional
VerifyNrHits(q, 0);
}