@Test
 public void printsASimpleMessage() {
   assertThat(subject.build("pants"), is(LEFT + "pants" + RIGHT));
 }
 @Test
 public void esacpesMessageString() {
   assertThat(subject.build("<a>pant's</a>"), is(LEFT + "<a>pant\\'s<\\/a>" + RIGHT));
 }
 @Test
 public void whenNothingIsPassedYouGetAnEmptyDiv() {
   assertThat(subject.build(""), is(LEFT + RIGHT));
 }