package org.apache.lucene.analysis.de;
/**
* 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.
*/
import java.io.IOException;
import java.io.Reader;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.BaseTokenStreamTestCase;
import org.apache.lucene.analysis.MockTokenizer;
import org.apache.lucene.analysis.ReusableAnalyzerBase;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.KeywordTokenizer;
/**
* Tests {@link GermanNormalizationFilter}
*/
public class TestGermanNormalizationFilter extends BaseTokenStreamTestCase {
private Analyzer analyzer = new ReusableAnalyzerBase() {
@Override
protected TokenStreamComponents createComponents(String field, Reader reader) {
final Tokenizer tokenizer = new MockTokenizer(reader, MockTokenizer.WHITESPACE, false);
final TokenStream stream = new GermanNormalizationFilter(tokenizer);
return new TokenStreamComponents(tokenizer, stream);
}
};
/**
* Tests that a/o/u + e is equivalent to the umlaut form
*/
public void testBasicExamples() throws IOException {
checkOneTerm(analyzer, "Schaltflächen", "Schaltflachen");
checkOneTerm(analyzer, "Schaltflaechen", "Schaltflachen");
}
/**
* Tests the specific heuristic that ue is not folded after a vowel or q.
*/
public void testUHeuristic() throws IOException {
checkOneTerm(analyzer, "dauer", "dauer");
}
/**
* Tests german specific folding of sharp-s
*/
public void testSpecialFolding() throws IOException {
checkOneTerm(analyzer, "weißbier", "weissbier");
}
/** blast some random strings through the analyzer */
public void testRandomStrings() throws Exception {
checkRandomData(random, analyzer, 10000*RANDOM_MULTIPLIER);
}
public void testEmptyTerm() throws IOException {
Analyzer a = new ReusableAnalyzerBase() {
@Override
protected TokenStreamComponents createComponents(String fieldName, Reader reader) {
Tokenizer tokenizer = new KeywordTokenizer(reader);
return new TokenStreamComponents(tokenizer, new GermanNormalizationFilter(tokenizer));
}
};
checkOneTermReuse(a, "", "");
}
}