@Test
public void testSizeIs() {

    final List<Integer> nullList = null;
    final List<Integer> listWithoutEntries = new ArrayList<Integer>();
    final List<Integer> listWithOneEntry = Arrays.asList(1);
    assertThat(Lists.sizeIs(nullList, 0), is(true));
    assertThat(Lists.sizeIs(listWithoutEntries, 0), is(true));
    assertThat(Lists.sizeIs(listWithOneEntry, 1), is(true));
}