| using NUnit.Framework; |
| using Assert = Lucene.Net.TestFramework.Assert; |
| |
| namespace Lucene.Net.Search |
| { |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| using Directory = Lucene.Net.Store.Directory; |
| using IndexReader = Lucene.Net.Index.IndexReader; |
| using LuceneTestCase = Lucene.Net.Util.LuceneTestCase; |
| using RandomIndexWriter = Lucene.Net.Index.RandomIndexWriter; |
| using Term = Lucene.Net.Index.Term; |
| |
| [TestFixture] |
| public class TestPositiveScoresOnlyCollector : LuceneTestCase |
| { |
| private sealed class SimpleScorer : Scorer |
| { |
| private int idx = -1; |
| |
| public SimpleScorer(Weight weight) |
| : base(weight) |
| { |
| } |
| |
| public override float GetScore() |
| { |
| return idx == scores.Length ? float.NaN : scores[idx]; |
| } |
| |
| public override int Freq => 1; |
| |
| public override int DocID => idx; |
| |
| public override int NextDoc() |
| { |
| return ++idx != scores.Length ? idx : NO_MORE_DOCS; |
| } |
| |
| public override int Advance(int target) |
| { |
| idx = target; |
| return idx < scores.Length ? idx : NO_MORE_DOCS; |
| } |
| |
| public override long GetCost() |
| { |
| return scores.Length; |
| } |
| } |
| |
| // The scores must have positive as well as negative values |
| private static readonly float[] scores = new float[] { 0.7767749f, -1.7839992f, 8.9925785f, 7.9608946f, -0.07948637f, 2.6356435f, 7.4950366f, 7.1490803f, -8.108544f, 4.961808f, 2.2423935f, -7.285586f, 4.6699767f }; |
| |
| [Test] |
| public virtual void TestNegativeScores() |
| { |
| // The Top*Collectors previously filtered out documents with <= scores. this |
| // behavior has changed. this test checks that if PositiveOnlyScoresFilter |
| // wraps one of these collectors, documents with <= 0 scores are indeed |
| // filtered. |
| |
| int numPositiveScores = 0; |
| for (int i = 0; i < scores.Length; i++) |
| { |
| if (scores[i] > 0) |
| { |
| ++numPositiveScores; |
| } |
| } |
| |
| Directory directory = NewDirectory(); |
| RandomIndexWriter writer = new RandomIndexWriter( |
| #if FEATURE_INSTANCE_TESTDATA_INITIALIZATION |
| this, |
| #endif |
| Random, directory); |
| writer.Commit(); |
| IndexReader ir = writer.GetReader(); |
| writer.Dispose(); |
| IndexSearcher searcher = NewSearcher(ir); |
| Weight fake = (new TermQuery(new Term("fake", "weight"))).CreateWeight(searcher); |
| Scorer s = new SimpleScorer(fake); |
| TopDocsCollector<ScoreDoc> tdc = TopScoreDocCollector.Create(scores.Length, true); |
| ICollector c = new PositiveScoresOnlyCollector(tdc); |
| c.SetScorer(s); |
| while (s.NextDoc() != DocIdSetIterator.NO_MORE_DOCS) |
| { |
| c.Collect(0); |
| } |
| TopDocs td = tdc.GetTopDocs(); |
| ScoreDoc[] sd = td.ScoreDocs; |
| Assert.AreEqual(numPositiveScores, td.TotalHits); |
| for (int i = 0; i < sd.Length; i++) |
| { |
| Assert.IsTrue(sd[i].Score > 0, "only positive scores should return: " + sd[i].Score); |
| } |
| ir.Dispose(); |
| directory.Dispose(); |
| } |
| } |
| } |