| using Lucene.Net.Documents; |
| using Lucene.Net.Index.Extensions; |
| using NUnit.Framework; |
| using System; |
| using Assert = Lucene.Net.TestFramework.Assert; |
| |
| namespace Lucene.Net.Index |
| { |
| /* |
| * 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 BytesRef = Lucene.Net.Util.BytesRef; |
| using Directory = Lucene.Net.Store.Directory; |
| using Document = Documents.Document; |
| using Field = Field; |
| using Lucene41PostingsFormat = Lucene.Net.Codecs.Lucene41.Lucene41PostingsFormat; |
| using LuceneTestCase = Lucene.Net.Util.LuceneTestCase; |
| using MockAnalyzer = Lucene.Net.Analysis.MockAnalyzer; |
| using TestUtil = Lucene.Net.Util.TestUtil; |
| |
| [TestFixture] |
| public class TestSegmentTermEnum : LuceneTestCase |
| { |
| internal Directory dir; |
| |
| [SetUp] |
| public override void SetUp() |
| { |
| base.SetUp(); |
| dir = NewDirectory(); |
| } |
| |
| [TearDown] |
| public override void TearDown() |
| { |
| dir.Dispose(); |
| base.TearDown(); |
| } |
| |
| [Test] |
| public virtual void TestTermEnum() |
| { |
| IndexWriter writer = null; |
| |
| writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random))); |
| |
| // 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.Dispose(); |
| |
| // verify document frequency of terms in an multi segment index |
| VerifyDocFreq(); |
| |
| // merge segments |
| writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random)).SetOpenMode(OpenMode.APPEND)); |
| writer.ForceMerge(1); |
| writer.Dispose(); |
| |
| // verify document frequency of terms in a single segment index |
| VerifyDocFreq(); |
| } |
| |
| [Test] |
| public virtual void TestPrevTermAtEnd() |
| { |
| IndexWriter writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random)).SetCodec(TestUtil.AlwaysPostingsFormat(new Lucene41PostingsFormat()))); |
| AddDoc(writer, "aaa bbb"); |
| writer.Dispose(); |
| SegmentReader reader = GetOnlySegmentReader(DirectoryReader.Open(dir)); |
| TermsEnum terms = reader.Fields.GetTerms("content").GetEnumerator(); |
| Assert.IsTrue(terms.MoveNext()); |
| Assert.AreEqual("aaa", terms.Term.Utf8ToString()); |
| Assert.IsTrue(terms.MoveNext()); |
| long ordB; |
| try |
| { |
| ordB = terms.Ord; |
| } |
| #pragma warning disable 168 |
| catch (NotSupportedException uoe) |
| #pragma warning restore 168 |
| { |
| // ok -- codec is not required to support ord |
| reader.Dispose(); |
| return; |
| } |
| Assert.AreEqual("bbb", terms.Term.Utf8ToString()); |
| Assert.IsFalse(terms.MoveNext()); |
| |
| terms.SeekExact(ordB); |
| Assert.AreEqual("bbb", terms.Term.Utf8ToString()); |
| reader.Dispose(); |
| } |
| |
| private void VerifyDocFreq() |
| { |
| IndexReader reader = DirectoryReader.Open(dir); |
| TermsEnum termEnum = MultiFields.GetTerms(reader, "content").GetEnumerator(); |
| |
| // create enumeration of all terms |
| // go to the first term (aaa) |
| termEnum.MoveNext(); |
| // assert that term is 'aaa' |
| Assert.AreEqual("aaa", termEnum.Term.Utf8ToString()); |
| Assert.AreEqual(200, termEnum.DocFreq); |
| // go to the second term (bbb) |
| termEnum.MoveNext(); |
| // assert that term is 'bbb' |
| Assert.AreEqual("bbb", termEnum.Term.Utf8ToString()); |
| Assert.AreEqual(100, termEnum.DocFreq); |
| |
| // create enumeration of terms after term 'aaa', |
| // including 'aaa' |
| termEnum.SeekCeil(new BytesRef("aaa")); |
| // assert that term is 'aaa' |
| Assert.AreEqual("aaa", termEnum.Term.Utf8ToString()); |
| Assert.AreEqual(200, termEnum.DocFreq); |
| // go to term 'bbb' |
| termEnum.MoveNext(); |
| // assert that term is 'bbb' |
| Assert.AreEqual("bbb", termEnum.Term.Utf8ToString()); |
| Assert.AreEqual(100, termEnum.DocFreq); |
| reader.Dispose(); |
| } |
| |
| private void AddDoc(IndexWriter writer, string value) |
| { |
| Document doc = new Document(); |
| doc.Add(NewTextField("content", value, Field.Store.NO)); |
| writer.AddDocument(doc); |
| } |
| } |
| } |