/*
* 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 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 WhitespaceAnalyzer = Lucene.Net.Analysis.WhitespaceAnalyzer;
using LuceneTestCase = Lucene.Net.Util.LuceneTestCase;
namespace Lucene.Net.Search
{
/// Tests {@link PrefixFilter} class.
///
///
/// Yura Smolsky
///
/// yonik
///
[TestFixture]
public class TestPrefixFilter : LuceneTestCase
{
[Test]
public virtual void TestPrefixFilter_Renamed_Method()
{
RAMDirectory directory = new RAMDirectory();
System.String[] categories = new System.String[]{"/Computers/Linux", "/Computers/Mac/One", "/Computers/Mac/Two", "/Computers/Windows"};
IndexWriter writer = new IndexWriter(directory, new WhitespaceAnalyzer(), true);
for (int i = 0; i < categories.Length; i++)
{
Document doc = new Document();
doc.Add(new Field("category", categories[i], Field.Store.YES, Field.Index.UN_TOKENIZED));
writer.AddDocument(doc);
}
writer.Close();
// PrefixFilter combined with ConstantScoreQuery
PrefixFilter filter = new PrefixFilter(new Term("category", "/Computers"));
Query query = new ConstantScoreQuery(filter);
IndexSearcher searcher = new IndexSearcher(directory);
Hits hits = searcher.Search(query);
Assert.AreEqual(4, hits.Length());
// test middle of values
filter = new PrefixFilter(new Term("category", "/Computers/Mac"));
query = new ConstantScoreQuery(filter);
hits = searcher.Search(query);
Assert.AreEqual(2, hits.Length());
// test start of values
filter = new PrefixFilter(new Term("category", "/Computers/Linux"));
query = new ConstantScoreQuery(filter);
hits = searcher.Search(query);
Assert.AreEqual(1, hits.Length());
// test end of values
filter = new PrefixFilter(new Term("category", "/Computers/Windows"));
query = new ConstantScoreQuery(filter);
hits = searcher.Search(query);
Assert.AreEqual(1, hits.Length());
// test non-existant
filter = new PrefixFilter(new Term("category", "/Computers/ObsoleteOS"));
query = new ConstantScoreQuery(filter);
hits = searcher.Search(query);
Assert.AreEqual(0, hits.Length());
// test non-existant, before values
filter = new PrefixFilter(new Term("category", "/Computers/AAA"));
query = new ConstantScoreQuery(filter);
hits = searcher.Search(query);
Assert.AreEqual(0, hits.Length());
// test non-existant, after values
filter = new PrefixFilter(new Term("category", "/Computers/ZZZ"));
query = new ConstantScoreQuery(filter);
hits = searcher.Search(query);
Assert.AreEqual(0, hits.Length());
// test zero length prefix
filter = new PrefixFilter(new Term("category", ""));
query = new ConstantScoreQuery(filter);
hits = searcher.Search(query);
Assert.AreEqual(4, hits.Length());
// test non existent field
filter = new PrefixFilter(new Term("nonexistantfield", "/Computers"));
query = new ConstantScoreQuery(filter);
hits = searcher.Search(query);
Assert.AreEqual(0, hits.Length());
}
}
}