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package org.apache.lucene.analysis.icu;
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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 org.apache.lucene.analysis.Analyzer;
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import org.apache.lucene.analysis.BaseTokenStreamTestCase;
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import org.apache.lucene.analysis.TokenStream;
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import org.apache.lucene.analysis.WhitespaceTokenizer;
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import com.ibm.icu.text.Normalizer2;
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* Tests the ICUNormalizer2Filter
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public class TestICUNormalizer2Filter extends BaseTokenStreamTestCase {
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Analyzer a = new Analyzer() {
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public TokenStream tokenStream(String fieldName, Reader reader) {
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return new ICUNormalizer2Filter(
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new WhitespaceTokenizer(TEST_VERSION_CURRENT, reader));
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public void testDefaults() throws IOException {
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assertAnalyzesTo(a, "This is a test", new String[] { "this", "is", "a", "test" });
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assertAnalyzesTo(a, "Ruß", new String[] { "russ" });
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assertAnalyzesTo(a, "ΜΆΪΟΣ", new String[] { "μάϊοσ" });
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assertAnalyzesTo(a, "Μάϊος", new String[] { "μάϊοσ" });
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// supplementary case folding
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assertAnalyzesTo(a, "𐐖", new String[] { "𐐾" });
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assertAnalyzesTo(a, "ﴳﴺﰧ", new String[] { "طمطمطم" });
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// removal of default ignorables
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assertAnalyzesTo(a, "क्ष", new String[] { "क्ष" });
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public void testAlternate() throws IOException {
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Analyzer a = new Analyzer() {
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public TokenStream tokenStream(String fieldName, Reader reader) {
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return new ICUNormalizer2Filter(
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new WhitespaceTokenizer(TEST_VERSION_CURRENT, reader),
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/* specify nfc with decompose to get nfd */
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Normalizer2.getInstance(null, "nfc", Normalizer2.Mode.DECOMPOSE));
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// decompose EAcute into E + combining Acute
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assertAnalyzesTo(a, "\u00E9", new String[] { "\u0065\u0301" });
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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);