@Test
 public void should_verify_that_actual_is_not_empty() {
   assertions.isNotEmpty();
   verify(strings).assertNotEmpty(assertions.description, assertions.actual);
 }
 @Test
 public void should_return_this() {
   StringAssert returned = assertions.isNotEmpty();
   assertSame(assertions, returned);
 }
 @Before
 public void setUp() {
   strings = mock(Strings.class);
   assertions = new StringAssert("Yoda", mock(Description.class));
   assertions.strings = strings;
 }