public virtual void TestEmpty2()
{
BooleanQuery query = new BooleanQuery();
query.Add(new TermQuery(new Term("id", "0")), BooleanClause.Occur.MUST);
query.Add(new TermQuery(new Term("id", "0")), BooleanClause.Occur.MUST_NOT);
Filter expected = new QueryWrapperFilter(query);
Filter actual = new CachingWrapperFilter(expected);
AssertFilterEquals(expected, actual);
}