/* * Copyright 2004 The Apache Software Foundation * * Licensed 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 SimpleAnalyzer = Lucene.Net.Analysis.SimpleAnalyzer; using Document = Lucene.Net.Documents.Document; using Field = Lucene.Net.Documents.Field; using IndexWriter = Lucene.Net.Index.IndexWriter; using Term = Lucene.Net.Index.Term; using RAMDirectory = Lucene.Net.Store.RAMDirectory; using NUnit.Framework; namespace Lucene.Net.Search { /// TestWildcard tests the '*' and '?' wildard characters. /// /// /// Otis Gospodnetic /// [TestFixture] public class TestWildcard { /// Creates a new TestWildcard instance. /// /// /// the name of the test /// /// Tests Wildcard queries with an asterisk. /// /// [Test] public virtual void TestAsterisk() { RAMDirectory indexStore = GetIndexStore("body", new System.String[]{"metal", "metals"}); IndexSearcher searcher = new IndexSearcher(indexStore); Query query1 = new TermQuery(new Term("body", "metal")); Query query2 = new WildcardQuery(new Term("body", "metal*")); Query query3 = new WildcardQuery(new Term("body", "m*tal")); Query query4 = new WildcardQuery(new Term("body", "m*tal*")); Query query5 = new WildcardQuery(new Term("body", "m*tals")); BooleanQuery query6 = new BooleanQuery(); query6.Add(query5, false, false); BooleanQuery query7 = new BooleanQuery(); query7.Add(query3, false, false); query7.Add(query5, false, false); // Queries do not automatically lower-case search terms: Query query8 = new WildcardQuery(new Term("body", "M*tal*")); AssertMatches(searcher, query1, 1); AssertMatches(searcher, query2, 2); AssertMatches(searcher, query3, 1); AssertMatches(searcher, query4, 2); AssertMatches(searcher, query5, 1); AssertMatches(searcher, query6, 1); AssertMatches(searcher, query7, 2); AssertMatches(searcher, query8, 0); } /// Tests Wildcard queries with a question mark. /// /// /// IOException if an error occurs /// [Test] public virtual void TestQuestionmark() { RAMDirectory indexStore = GetIndexStore("body", new System.String[]{"metal", "metals", "mXtals", "mXtXls"}); IndexSearcher searcher = new IndexSearcher(indexStore); Query query1 = new WildcardQuery(new Term("body", "m?tal")); Query query2 = new WildcardQuery(new Term("body", "metal?")); Query query3 = new WildcardQuery(new Term("body", "metals?")); Query query4 = new WildcardQuery(new Term("body", "m?t?ls")); Query query5 = new WildcardQuery(new Term("body", "M?t?ls")); AssertMatches(searcher, query1, 1); AssertMatches(searcher, query2, 2); AssertMatches(searcher, query3, 1); AssertMatches(searcher, query4, 3); AssertMatches(searcher, query5, 0); } private RAMDirectory GetIndexStore(System.String field, System.String[] contents) { RAMDirectory indexStore = new RAMDirectory(); IndexWriter writer = new IndexWriter(indexStore, new SimpleAnalyzer(), true); for (int i = 0; i < contents.Length; ++i) { Document doc = new Document(); doc.Add(Field.Text(field, contents[i])); writer.AddDocument(doc); } writer.Optimize(); writer.Close(); return indexStore; } private void AssertMatches(IndexSearcher searcher, Query q, int expectedMatches) { Hits result = searcher.Search(q); Assert.AreEqual(expectedMatches, result.Length()); } } }