package no.priv.garshol.duke.test;
import org.junit.Test;
import org.junit.Before;
import static junit.framework.Assert.fail;
import static junit.framework.Assert.assertTrue;
import static junit.framework.Assert.assertEquals;
import no.priv.garshol.duke.DukeConfigException;
import no.priv.garshol.duke.comparators.QGramComparator;
public class QGramComparatorTest {
private QGramComparator comp;
@Before
public void setup() {
comp = new QGramComparator();
}
@Test
public void testEmpty() {
assertEquals(1.0, comp.compare("", ""));
}
@Test
public void testOneIsEmpty() {
assertEquals(0.0, comp.compare("", "abc"));
}
@Test
public void testOneIsDifferent() {
assertEquals((4.0 / 6.0), comp.compare("abc def", "cab def"));
}
@Test
public void testGail() {
assertEquals((1.0 / 3.0), comp.compare("gail", "gayle"));
}
@Test
public void testGailJaccard() {
comp.setFormula(QGramComparator.Formula.JACCARD);
assertEquals((1.0 / 6.0), comp.compare("gail", "gayle"));
}
@Test
public void testGailDice() {
comp.setFormula(QGramComparator.Formula.DICE);
assertEquals((2.0 / 7.0), comp.compare("gail", "gayle"));
}
@Test
public void testGail3() {
comp.setQ(3);
assertEquals(0.0, comp.compare("gail", "gayle"));
}
@Test
public void testGarshol3() {
comp.setQ(3);
assertEquals((4.0 / 5.0), comp.compare("garshol", "garshoel"));
}
@Test
public void testGailPositional() {
comp.setTokenizer(QGramComparator.Tokenizer.POSITIONAL);
assertEquals((1.0 / 3.0), comp.compare("gail", "gayle"));
}
@Test
public void testKakadu() {
assertEquals((1.0 / 2.0), comp.compare("kakadu", "cacadu"));
}
@Test
public void testKakaduPositional() {
comp.setTokenizer(QGramComparator.Tokenizer.POSITIONAL);
assertEquals((2.0 / 5.0), comp.compare("kakadu", "cacadu"));
}
@Test
public void testGailEnds() {
comp.setTokenizer(QGramComparator.Tokenizer.ENDS);
assertEquals((2.0 / 5.0), comp.compare("gail", "gayle"));
}
}