@Test
public void testIsEmpty() {

    final List<Integer> nullList = null;
    final List<Integer> listWithoutEntries = new ArrayList<Integer>();
    final List<Integer> listWithOneEntry = Arrays.asList(1);
    assertThat(Lists.isEmpty(nullList), is(true));
    assertThat(Lists.isEmpty(listWithoutEntries), is(true));
    assertThat(Lists.isEmpty(listWithOneEntry), is(false));
}