public void MissingTerms_Test()
{
string fieldName = "field1";
RAMDirectory rd = new RAMDirectory();
IndexWriter w = new IndexWriter(rd, new WhitespaceAnalyzer(), IndexWriter.MaxFieldLength.UNLIMITED);
for (int i = 0; i < 100; i++)
{
Document doc = new Document();
int term = i * 10; //terms are units of 10;
doc.Add(new Field(fieldName, "" + term, Field.Store.YES, Field.Index.NOT_ANALYZED));
w.AddDocument(doc);
}
w.Close();
IndexReader reader = IndexReader.Open(rd, true);
TermsFilter tf = new TermsFilter();
tf.AddTerm(new Term(fieldName, "19"));
OpenBitSet bits = (OpenBitSet)tf.GetDocIdSet(reader);
Assert.AreEqual(0, bits.Cardinality(), "Must match nothing");
tf.AddTerm(new Term(fieldName, "20"));
bits = (OpenBitSet)tf.GetDocIdSet(reader);
Assert.AreEqual(1, bits.Cardinality(), "Must match 1");
tf.AddTerm(new Term(fieldName, "10"));
bits = (OpenBitSet)tf.GetDocIdSet(reader);
Assert.AreEqual(2, bits.Cardinality(), "Must match 2");
tf.AddTerm(new Term(fieldName, "00"));
bits = (OpenBitSet)tf.GetDocIdSet(reader);
Assert.AreEqual(2, bits.Cardinality(), "Must match 2");
}
}