| /* |
| * 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. |
| */ |
| package org.apache.lucene.analysis.bn; |
| |
| import java.io.IOException; |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.analysis.BaseTokenStreamTestCase; |
| import org.apache.lucene.analysis.TokenFilter; |
| import org.apache.lucene.analysis.Tokenizer; |
| import org.apache.lucene.analysis.core.KeywordTokenizer; |
| import org.apache.lucene.util.TestUtil; |
| |
| /** Test BengaliNormalizer */ |
| public class TestBengaliNormalizer extends BaseTokenStreamTestCase { |
| /** Test some basic normalization, with an example from the paper. */ |
| public void testChndrobindu() throws IOException { |
| check("চাঁদ", "চাদ"); |
| } |
| |
| public void testRosshoIKar() throws IOException { |
| check("বাড়ী", "বারি"); |
| check("তীর", "তির"); |
| } |
| |
| public void testRosshoUKar() throws IOException { |
| check("ভূল", "ভুল"); |
| check("অনূপ", "অনুপ"); |
| } |
| |
| public void testNga() throws IOException { |
| check("বাঙলা", "বাংলা"); |
| } |
| |
| public void testJaPhaala() throws IOException { |
| check("ব্যাক্তি", "বেক্তি"); |
| check("সন্ধ্যা", "সন্ধা"); |
| } |
| |
| public void testBaPhalaa() throws IOException { |
| check("স্বদেশ", "সদেস"); |
| check("তত্ত্ব", "তত্ত"); |
| check("বিশ্ব", "বিসস"); |
| } |
| |
| public void testVisarga() throws IOException { |
| check("দুঃখ", "দুখখ"); |
| check("উঃ", "উহ"); |
| check("পুনঃ", "পুন"); |
| } |
| |
| public void testBasics() throws IOException { |
| check("কণা", "কনা"); |
| check("শরীর", "সরির"); |
| check("বাড়ি", "বারি"); |
| } |
| |
| /** |
| * creates random strings in the bengali block and ensures the normalizer doesn't trip up on them |
| */ |
| public void testRandom() throws IOException { |
| BengaliNormalizer normalizer = new BengaliNormalizer(); |
| for (int i = 0; i < 100000; i++) { |
| String randomBengali = TestUtil.randomSimpleStringRange(random(), '\u0980', '\u09FF', 7); |
| try { |
| int newLen = normalizer.normalize(randomBengali.toCharArray(), randomBengali.length()); |
| assertTrue(newLen >= 0); // should not return negative length |
| assertTrue(newLen <= randomBengali.length()); // should not increase length of string |
| } catch (Exception e) { |
| System.err.println( |
| "normalizer failed on input: '" + randomBengali + "' (" + escape(randomBengali) + ")"); |
| throw e; |
| } |
| } |
| } |
| |
| private void check(String input, String output) throws IOException { |
| Tokenizer tokenizer = whitespaceMockTokenizer(input); |
| TokenFilter tf = new BengaliNormalizationFilter(tokenizer); |
| assertTokenStreamContents(tf, new String[] {output}); |
| } |
| |
| public void testEmptyTerm() throws IOException { |
| Analyzer a = |
| new Analyzer() { |
| @Override |
| protected TokenStreamComponents createComponents(String fieldName) { |
| Tokenizer tokenizer = new KeywordTokenizer(); |
| return new TokenStreamComponents(tokenizer, new BengaliNormalizationFilter(tokenizer)); |
| } |
| }; |
| checkOneTerm(a, "", ""); |
| a.close(); |
| } |
| } |