public virtual void TestNegativeQueryBoost()
{
Query q = new TermQuery(new Term("foo", "bar"));
q.Boost = -42f;
Assert.AreEqual(-42f, q.Boost, 0.0f);
Directory directory = newDirectory();
try
{
Analyzer analyzer = new MockAnalyzer(random());
IndexWriterConfig conf = newIndexWriterConfig(TEST_VERSION_CURRENT, analyzer);
IndexWriter writer = new IndexWriter(directory, conf);
try
{
Document d = new Document();
d.add(newTextField("foo", "bar", Field.Store.YES));
writer.addDocument(d);
}
finally
{
writer.close();
}
IndexReader reader = DirectoryReader.open(directory);
try
{
IndexSearcher searcher = newSearcher(reader);
ScoreDoc[] hits = searcher.search(q, null, 1000).scoreDocs;
Assert.AreEqual(1, hits.Length);
Assert.IsTrue("score is not negative: " + hits[0].score, hits[0].score < 0);
Explanation explain = searcher.explain(q, hits[0].doc);
Assert.AreEqual("score doesn't match explanation", hits[0].score, explain.Value, 0.001f);
Assert.IsTrue("explain doesn't think doc is a match", explain.Match);
}
finally
{
reader.close();
}
}
finally
{
directory.close();
}
}
