import org.junit.Assert;
import org.junit.Test;

public class DurationTest {
    @Test
    public void testToStringCORMutation() {
        // Killed 4,5
        Assert.assertEquals("PT-0.999999999S",
            new Duration(-1, 1).toString());
        // Killed 1,3,4,6,7
        Assert.assertEquals("PT-1S",
            new Duration(-1, 0).toString());
        // Killed 1,3,4,6,8
        Assert.assertEquals("PT0.000000001S",
            new Duration(0, 1).toString());
    }
}