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* this work for additional information regarding copyright
* ownership. Elasticsearch 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
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package org.apache.lucene.analysis.miscellaneous;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.MockTokenizer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.elasticsearch.test.ESTestCase;
import java.io.IOException;
import static org.hamcrest.Matchers.equalTo;
public class UniqueTokenFilterTests extends ESTestCase {
public void testSimple() throws IOException {
Analyzer analyzer = new Analyzer() {
@Override
protected TokenStreamComponents createComponents(String fieldName) {
Tokenizer t = new MockTokenizer(MockTokenizer.WHITESPACE, false);
return new TokenStreamComponents(t, new UniqueTokenFilter(t));
}
};
TokenStream test = analyzer.tokenStream("test", "this test with test");
test.reset();
CharTermAttribute termAttribute = test.addAttribute(CharTermAttribute.class);
assertThat(test.incrementToken(), equalTo(true));
assertThat(termAttribute.toString(), equalTo("this"));
assertThat(test.incrementToken(), equalTo(true));
assertThat(termAttribute.toString(), equalTo("test"));
assertThat(test.incrementToken(), equalTo(true));
assertThat(termAttribute.toString(), equalTo("with"));
assertThat(test.incrementToken(), equalTo(false));
}
}