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package org.apache.lucene.analysis;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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import java.io.IOException;
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import java.io.Reader;
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import java.io.StringReader;
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import org.apache.lucene.analysis.BaseTokenStreamTestCase;
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import org.apache.lucene.analysis.Analyzer;
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import org.apache.lucene.analysis.MockTokenizer;
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import org.apache.lucene.analysis.TokenStream;
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import org.apache.lucene.analysis.Tokenizer;
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import static org.apache.lucene.analysis.VocabularyAssert.*;
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* Test the PorterStemFilter with Martin Porter's test data.
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public class TestPorterStemFilter extends BaseTokenStreamTestCase {
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Analyzer a = new ReusableAnalyzerBase() {
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protected TokenStreamComponents createComponents(String fieldName,
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Tokenizer t = new MockTokenizer(reader, MockTokenizer.KEYWORD, false);
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return new TokenStreamComponents(t, new PorterStemFilter(t));
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* Run the stemmer against all strings in voc.txt
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* The output should be the same as the string in output.txt
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public void testPorterStemFilter() throws Exception {
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assertVocabulary(a, getDataFile("porterTestData.zip"), "voc.txt", "output.txt");
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public void testWithKeywordAttribute() throws IOException {
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CharArraySet set = new CharArraySet(TEST_VERSION_CURRENT, 1, true);
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set.add("yourselves");
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Tokenizer tokenizer = new MockTokenizer(new StringReader("yourselves yours"), MockTokenizer.WHITESPACE, false);
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TokenStream filter = new PorterStemFilter(new KeywordMarkerFilter(tokenizer, set));
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assertTokenStreamContents(filter, new String[] {"yourselves", "your"});
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/** blast some random strings through the analyzer */
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public void testRandomStrings() throws Exception {
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checkRandomData(random, a, 10000*RANDOM_MULTIPLIER);