/*
* 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 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;
namespace Lucene.Net.Search
{
/// TestWildcard tests the '*' and '?' wildcard characters.
///
///
/// $Id: TestWildcard.java 329860 2005-10-31 17:06:29Z bmesser $
///
/// Otis Gospodnetic
///
[TestFixture]
public class TestWildcard
{
[Test]
public virtual void TestEquals()
{
WildcardQuery wq1 = new WildcardQuery(new Term("field", "b*a"));
WildcardQuery wq2 = new WildcardQuery(new Term("field", "b*a"));
WildcardQuery wq3 = new WildcardQuery(new Term("field", "b*a"));
// reflexive?
Assert.AreEqual(wq1, wq2);
Assert.AreEqual(wq2, wq1);
// transitive?
Assert.AreEqual(wq2, wq3);
Assert.AreEqual(wq1, wq3);
Assert.IsFalse(wq1.Equals(null));
FuzzyQuery fq = new FuzzyQuery(new Term("field", "b*a"));
Assert.IsFalse(wq1.Equals(fq));
Assert.IsFalse(fq.Equals(wq1));
}
/// 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, BooleanClause.Occur.SHOULD);
BooleanQuery query7 = new BooleanQuery();
query7.Add(query3, BooleanClause.Occur.SHOULD);
query7.Add(query5, BooleanClause.Occur.SHOULD);
// 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);
AssertMatches(searcher, new WildcardQuery(new Term("body", "*tall")), 0);
AssertMatches(searcher, new WildcardQuery(new Term("body", "*tal")), 1);
AssertMatches(searcher, new WildcardQuery(new Term("body", "*tal*")), 2);
}
/// 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"));
Query query6 = new WildcardQuery(new Term("body", "meta??"));
AssertMatches(searcher, query1, 1);
AssertMatches(searcher, query2, 1);
AssertMatches(searcher, query3, 0);
AssertMatches(searcher, query4, 3);
AssertMatches(searcher, query5, 0);
AssertMatches(searcher, query6, 1); // Query: 'meta??' matches 'metals' not 'metal'
}
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)
{
Lucene.Net.Documents.Document doc = new Lucene.Net.Documents.Document();
doc.Add(new Field(field, contents[i], Field.Store.YES, Field.Index.TOKENIZED));
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());
}
}
}