/*
* 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 opennlp.tools.doccat;
import java.util.Collections;
import org.junit.Assert;
import org.junit.Test;
public class BagOfWordsFeatureGeneratorTest {
@Test
public void testNull() {
BagOfWordsFeatureGenerator generator = new BagOfWordsFeatureGenerator();
try {
generator.extractFeatures(null, Collections.emptyMap());
Assert.fail("NullPointerException must be thrown");
}
catch (NullPointerException expected) {
}
}
@Test
public void testEmpty() {
BagOfWordsFeatureGenerator generator = new BagOfWordsFeatureGenerator();
Assert.assertEquals(0, generator.extractFeatures(new String[]{}, Collections.emptyMap()).size());
}
@Test
public void testUseAllTokens() {
BagOfWordsFeatureGenerator generator = new BagOfWordsFeatureGenerator();
Assert.assertArrayEquals(new String[]{"bow=it", "bow=is", "bow=12.345", "bow=feet", "bow=long"},
generator.extractFeatures(new String[]{"it", "is", "12.345", "feet", "long"},
Collections.emptyMap()).toArray());
}
@Test
public void testOnlyLetterTokens() {
BagOfWordsFeatureGenerator generator = new BagOfWordsFeatureGenerator(true);
Assert.assertArrayEquals(new String[]{"bow=it", "bow=is", "bow=feet", "bow=long"},
generator.extractFeatures(new String[]{"it", "is", "12.345", "feet", "long"},
Collections.emptyMap()).toArray());
}
}