@Test
public void shouldNotBeSatisfiable() {

    assertThat(rangeHelper.isSatisfiable(Collections.singletonList(new Range(0, 0)), 0), is(false));
    assertThat(rangeHelper.isSatisfiable(Collections.singletonList(new Range(0, 1)), 1), is(false));
    assertThat(rangeHelper.isSatisfiable(Collections.singletonList(new Range(0, 2)), 1), is(false));
    assertThat(rangeHelper.isSatisfiable(Collections.singletonList(new Range(-1, 0)), 0), is(false));
    assertThat(rangeHelper.isSatisfiable(Collections.singletonList(new Range(-1, 0)), 55), is(false));
    assertThat(rangeHelper.isSatisfiable(Collections.singletonList(new Range(50, 49)), 0), is(false));
}