src/Lucene.Net.Tests/Search/TestNot.cs

using Lucene.Net.Documents;
using NUnit.Framework;
using Assert = Lucene.Net.TestFramework.Assert;

namespace Lucene.Net.Search
{
    /*
     * 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 Directory = Lucene.Net.Store.Directory;
    using Document = Documents.Document;
    using Field = Field;
    using IndexReader = Lucene.Net.Index.IndexReader;
    using LuceneTestCase = Lucene.Net.Util.LuceneTestCase;
    using RandomIndexWriter = Lucene.Net.Index.RandomIndexWriter;
    using Term = Lucene.Net.Index.Term;

    /// <summary>
    /// Similarity unit test.
    ///
    ///
    /// </summary>
    [TestFixture]
    public class TestNot : LuceneTestCase
    {
        [Test]
        public virtual void TestNot_Mem()
        {
            Directory store = NewDirectory();
            RandomIndexWriter writer = new RandomIndexWriter(
#if FEATURE_INSTANCE_TESTDATA_INITIALIZATION
                this,
#endif
                Random, store);

            Document d1 = new Document();
            d1.Add(NewTextField("field", "a b", Field.Store.YES));

            writer.AddDocument(d1);
            IndexReader reader = writer.GetReader();

            IndexSearcher searcher = NewSearcher(reader);

            BooleanQuery query = new BooleanQuery();
            query.Add(new TermQuery(new Term("field", "a")), Occur.SHOULD);
            query.Add(new TermQuery(new Term("field", "b")), Occur.MUST_NOT);

            ScoreDoc[] hits = searcher.Search(query, null, 1000).ScoreDocs;
            Assert.AreEqual(0, hits.Length);
            writer.Dispose();
            reader.Dispose();
            store.Dispose();
        }
    }
}