public void TestNegativePositions()
{
SinkTokenizer tokens = new SinkTokenizer();
Token t = new Token();
t.SetTermText("a");
t.SetPositionIncrement(0);
tokens.Add(t);
t.SetTermText("b");
t.SetPositionIncrement(1);
tokens.Add(t);
t.SetTermText("c");
tokens.Add(t);
MockRAMDirectory dir = new MockRAMDirectory();
IndexWriter w = new IndexWriter(dir, false, new WhitespaceAnalyzer(), true);
Document doc = new Document();
doc.Add(new Field("field", tokens));
w.AddDocument(doc);
w.Close();
IndexSearcher s = new IndexSearcher(dir);
PhraseQuery pq = new PhraseQuery();
pq.Add(new Term("field", "a"));
pq.Add(new Term("field", "b"));
pq.Add(new Term("field", "c"));
Hits hits = s.Search(pq);
Assert.AreEqual(1, hits.Length());
Query q = new SpanTermQuery(new Term("field", "a"));
hits = s.Search(q);
Assert.AreEqual(1, hits.Length());
TermPositions tps = s.GetIndexReader().TermPositions(new Term("field", "a"));
Assert.IsTrue(tps.Next());
Assert.AreEqual(1, tps.Freq());
Assert.AreEqual(-1, tps.NextPosition());
Assert.IsTrue(_TestUtil.CheckIndex(dir));
s.Close();
dir.Close();
}
public override Token Next()
{
if (tokenUpto >= Enclosing_Instance.tokens.Length)
return null;
else
{
Token t = new Token();
TestToken testToken = Enclosing_Instance.tokens[tokenUpto++];
t.SetTermText(testToken.text);
if (tokenUpto > 1)
t.SetPositionIncrement(testToken.pos - Enclosing_Instance.tokens[tokenUpto - 2].pos);
else
t.SetPositionIncrement(testToken.pos + 1);
t.SetStartOffset(testToken.startOffset);
t.SetEndOffset(testToken.endOffset);
return t;
}
}