@Test
public void testToString() {

    assertThat(s1.toString()).isEqualTo("Other"); //$NON-NLS-1$
    assertThat(s2.toString()).isEqualTo(LocalUtil.getDateTimeFormatter().format(today));
    assertThat(s3.toString()).isEqualTo("test serie 3"); //$NON-NLS-1$
}