/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Copyright (C) 2007 University of Waikato, Hamilton, New Zealand
*/
package weka.core.tokenizers;
import junit.framework.Test;
import junit.framework.TestSuite;
/**
* Tests NGramTokenizer. Run from the command line with:<p>
* java weka.core.tokenizers.NGramTokenizerTest
*
* @author FracPete (fracpete at waikato dot ac dot nz)
* @version $Revision: 8034 $
*/
public class NGramTokenizerTest
extends AbstractTokenizerTest {
public NGramTokenizerTest(String name) {
super(name);
}
/** Creates a default NGramTokenizer */
public Tokenizer getTokenizer() {
return new NGramTokenizer();
}
/**
* tests the number of generated tokens
*/
public void testNumberOfGeneratedTokens() {
String s;
String[] result;
s = "HOWEVER, the egg only got larger and larger, and more and more human";
// only 1-grams
try {
result = Tokenizer.tokenize(m_Tokenizer, new String[]{"-min", "1", "-max", "1", s});
assertEquals("number of tokens differ (1)", 13, result.length);
}
catch (Exception e) {
fail("Error tokenizing string '" + s + "'!");
}
// only 2-grams
try {
result = Tokenizer.tokenize(m_Tokenizer, new String[]{"-min", "2", "-max", "2", s});
assertEquals("number of tokens differ (2)", 12, result.length);
}
catch (Exception e) {
fail("Error tokenizing string '" + s + "'!");
}
// 1 to 3-grams
try {
result = Tokenizer.tokenize(m_Tokenizer, new String[]{"-min", "1", "-max", "3", s});
assertEquals("number of tokens differ (3)", 36, result.length);
}
catch (Exception e) {
fail("Error tokenizing string '" + s + "'!");
}
}
public static Test suite() {
return new TestSuite(NGramTokenizerTest.class);
}
public static void main(String[] args){
junit.textui.TestRunner.run(suite());
}
}