@Test
public void testGetSuffix() {

    FileName fn = new FileName("test.suf");
    assertEquals("suf", fn.getSuffix());
    fn = new FileName("test");
    assertEquals("", fn.getSuffix());
    fn = new FileName("my.test.file.suf");
    assertEquals("suf", fn.getSuffix());
    fn = new FileName("");
    assertEquals("", fn.getSuffix());
    fn = new FileName(".suf");
    assertEquals("suf", fn.getSuffix());
}