@Test
public void testParseYesterday()
{

   Calendar yesterday = Calendar.getInstance();
   yesterday.setTime(new Date());
   yesterday.add(Calendar.DAY_OF_MONTH, -1);
   List<Date> parse = new PrettyTimeParser().parse("yesterday");
   Assert.assertFalse(parse.isEmpty());
   Calendar parsedDate = Calendar.getInstance();
   parsedDate.setTime(parse.get(0));
   Assert.assertEquals(yesterday.get(Calendar.DAY_OF_MONTH), parsedDate.get(Calendar.DAY_OF_MONTH));
   Assert.assertEquals(yesterday.get(Calendar.MONTH), parsedDate.get(Calendar.MONTH));
   Assert.assertEquals(yesterday.get(Calendar.YEAR), parsedDate.get(Calendar.YEAR));
}