| /* |
| * 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 System; |
| |
| using NUnit.Framework; |
| |
| using WhitespaceAnalyzer = Lucene.Net.Analysis.WhitespaceAnalyzer; |
| using Document = Lucene.Net.Documents.Document; |
| using Field = Lucene.Net.Documents.Field; |
| using Directory = Lucene.Net.Store.Directory; |
| using MockRAMDirectory = Lucene.Net.Store.MockRAMDirectory; |
| using RAMDirectory = Lucene.Net.Store.RAMDirectory; |
| using LuceneTestCase = Lucene.Net.Util.LuceneTestCase; |
| |
| namespace Lucene.Net.Index |
| { |
| |
| |
| [TestFixture] |
| public class TestSegmentTermEnum:LuceneTestCase |
| { |
| internal Directory dir = new RAMDirectory(); |
| |
| [Test] |
| public virtual void TestTermEnum() |
| { |
| IndexWriter writer = null; |
| |
| writer = new IndexWriter(dir, new WhitespaceAnalyzer(), true, IndexWriter.MaxFieldLength.LIMITED); |
| |
| // ADD 100 documents with term : aaa |
| // add 100 documents with terms: aaa bbb |
| // Therefore, term 'aaa' has document frequency of 200 and term 'bbb' 100 |
| for (int i = 0; i < 100; i++) |
| { |
| AddDoc(writer, "aaa"); |
| AddDoc(writer, "aaa bbb"); |
| } |
| |
| writer.Close(); |
| |
| // verify document frequency of terms in an unoptimized index |
| VerifyDocFreq(); |
| |
| // merge segments by optimizing the index |
| writer = new IndexWriter(dir, new WhitespaceAnalyzer(), false, IndexWriter.MaxFieldLength.LIMITED); |
| writer.Optimize(); |
| writer.Close(); |
| |
| // verify document frequency of terms in an optimized index |
| VerifyDocFreq(); |
| } |
| |
| [Test] |
| public virtual void TestPrevTermAtEnd() |
| { |
| Directory dir = new MockRAMDirectory(); |
| IndexWriter writer = new IndexWriter(dir, new WhitespaceAnalyzer(), true, IndexWriter.MaxFieldLength.LIMITED); |
| AddDoc(writer, "aaa bbb"); |
| writer.Close(); |
| SegmentReader reader = SegmentReader.GetOnlySegmentReader(dir); |
| SegmentTermEnum termEnum = (SegmentTermEnum) reader.Terms(); |
| Assert.IsTrue(termEnum.Next()); |
| Assert.AreEqual("aaa", termEnum.Term.Text); |
| Assert.IsTrue(termEnum.Next()); |
| Assert.AreEqual("aaa", termEnum.Prev().Text); |
| Assert.AreEqual("bbb", termEnum.Term.Text); |
| Assert.IsFalse(termEnum.Next()); |
| Assert.AreEqual("bbb", termEnum.Prev().Text); |
| } |
| |
| private void VerifyDocFreq() |
| { |
| IndexReader reader = IndexReader.Open(dir, true); |
| TermEnum termEnum = null; |
| |
| // create enumeration of all terms |
| termEnum = reader.Terms(); |
| // go to the first term (aaa) |
| termEnum.Next(); |
| // assert that term is 'aaa' |
| Assert.AreEqual("aaa", termEnum.Term.Text); |
| Assert.AreEqual(200, termEnum.DocFreq()); |
| // go to the second term (bbb) |
| termEnum.Next(); |
| // assert that term is 'bbb' |
| Assert.AreEqual("bbb", termEnum.Term.Text); |
| Assert.AreEqual(100, termEnum.DocFreq()); |
| |
| termEnum.Close(); |
| |
| |
| // create enumeration of terms after term 'aaa', including 'aaa' |
| termEnum = reader.Terms(new Term("content", "aaa")); |
| // assert that term is 'aaa' |
| Assert.AreEqual("aaa", termEnum.Term.Text); |
| Assert.AreEqual(200, termEnum.DocFreq()); |
| // go to term 'bbb' |
| termEnum.Next(); |
| // assert that term is 'bbb' |
| Assert.AreEqual("bbb", termEnum.Term.Text); |
| Assert.AreEqual(100, termEnum.DocFreq()); |
| |
| termEnum.Close(); |
| } |
| |
| private void AddDoc(IndexWriter writer, System.String value_Renamed) |
| { |
| Document doc = new Document(); |
| doc.Add(new Field("content", value_Renamed, Field.Store.NO, Field.Index.ANALYZED)); |
| writer.AddDocument(doc); |
| } |
| } |
| } |