/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.miscellaneous;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.ReusableAnalyzerBase;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.WhitespaceTokenizer;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.elasticsearch.common.lucene.Lucene;
import org.testng.annotations.Test;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import static org.hamcrest.MatcherAssert.*;
import static org.hamcrest.Matchers.*;
/**
*/
@Test
public class TruncateTokenFilterTests {
@Test public void simpleTest() throws IOException {
Analyzer analyzer = new ReusableAnalyzerBase() {
@Override
protected TokenStreamComponents createComponents(String fieldName,
Reader reader) {
Tokenizer t = new WhitespaceTokenizer(Lucene.VERSION, reader);
return new TokenStreamComponents(t, new TruncateTokenFilter(t, 3));
}
};
TokenStream test = analyzer.reusableTokenStream("test", new StringReader("a bb ccc dddd eeeee"));
CharTermAttribute termAttribute = test.addAttribute(CharTermAttribute.class);
assertThat(test.incrementToken(), equalTo(true));
assertThat(termAttribute.toString(), equalTo("a"));
assertThat(test.incrementToken(), equalTo(true));
assertThat(termAttribute.toString(), equalTo("bb"));
assertThat(test.incrementToken(), equalTo(true));
assertThat(termAttribute.toString(), equalTo("ccc"));
assertThat(test.incrementToken(), equalTo(true));
assertThat(termAttribute.toString(), equalTo("ddd"));
assertThat(test.incrementToken(), equalTo(true));
assertThat(termAttribute.toString(), equalTo("eee"));
assertThat(test.incrementToken(), equalTo(false));
}
}