src/Lucene.Net.Tests.Classification/SimpleNaiveBayesClassifierTest.cs

/*
 * 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.
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using Lucene.Net.Analysis;
using Lucene.Net.Index;
using Lucene.Net.Search;
using Lucene.Net.Util;
using NUnit.Framework;

namespace Lucene.Net.Classification
{
    /**
     * Testcase for {@link SimpleNaiveBayesClassifier}
     */
    // TODO : eventually remove this if / when fallback methods exist for all un-supportable codec methods (see LUCENE-4872)
    // [Util.LuceneTestCase.SuppressCodecs("Lucene3x")] TODO : seems like we lost ability to pass in params in SupressCodecs constructor
    [SuppressCodecs]
    public class SimpleNaiveBayesClassifierTest : ClassificationTestBase<BytesRef>
    {
        [Test]
        public void TestBasicUsage()
        {
            CheckCorrectClassification(new SimpleNaiveBayesClassifier(), TECHNOLOGY_INPUT, TECHNOLOGY_RESULT, new MockAnalyzer(Random()), textFieldName, categoryFieldName);
            CheckCorrectClassification(new SimpleNaiveBayesClassifier(), POLITICS_INPUT, POLITICS_RESULT, new MockAnalyzer(Random()), textFieldName, categoryFieldName);
        }

        [Test]
        public void TestBasicUsageWithQuery()
        {
            CheckCorrectClassification(new SimpleNaiveBayesClassifier(), TECHNOLOGY_INPUT, TECHNOLOGY_RESULT, new MockAnalyzer(Random()), textFieldName, categoryFieldName, new TermQuery(new Term(textFieldName, "it")));
        }

        [Test]
        [Ignore("Need to figure out what to do with NGramAnalyzer, issues with things in Analysis.Common project")]
        public void TestNGramUsage()
        {
            //CheckCorrectClassification(new SimpleNaiveBayesClassifier(), TECHNOLOGY_INPUT, TECHNOLOGY_RESULT, new NGramAnalyzer(), textFieldName, categoryFieldName);
        }

        //private class NGramAnalyzer : Analyzer
        //{
        //    public override TokenStreamComponents CreateComponents(String fieldName, TextReader reader)
        //    {
        //        Tokenizer tokenizer = new KeywordTokenizer(reader);
        //        return new TokenStreamComponents(tokenizer, new ReverseStringFilter(TEST_VERSION_CURRENT, new EdgeNGramTokenFilter(TEST_VERSION_CURRENT, new ReverseStringFilter(TEST_VERSION_CURRENT, tokenizer), 10, 20)));
        //    }
        //}

        [Test]
        public void TestPerformance()
        {
            CheckPerformance(new SimpleNaiveBayesClassifier(), new MockAnalyzer(Random()), categoryFieldName);
        }
    }
}