@Test
public void testParseInvalid() {

    assertThat(RangeOption.parse("Range=10-")).isNull();
    assertThat(RangeOption.parse("Range=10-a")).isNull();
    assertThat(RangeOption.parse("lang-en")).isNull();
    assertThat(RangeOption.parse("member;Range=10-100")).isNull();
    assertThat(RangeOption.parse(";Range=10-100")).isNull();
    assertThat(RangeOption.parse("Range=10-100;")).isNull();
    assertThat(RangeOption.parse("Range=10-100;lang-de")).isNull();
}