@Test
void after() {

    assertThat(Range.of(10L, 20L).after(9)).isTrue();
    assertThat(Range.of(10L, 20L).after(10)).isFalse();
    assertThat(Range.of(10L, 20L).after(15)).isFalse();
    assertThat(Range.of(10L, 20L).after(19)).isFalse();
    assertThat(Range.of(10L, 20L).after(20)).isFalse();
}