@Test
    public void shouldReturnFalseStringWhenFalseBooleanIsSupplied() throws Exception {
      BooleanField field = new BooleanField(new HashMap<String, Object>(), _usLocale, _usLocale);
      field.setCurrentValue(false);

      assertEquals("No", field.toFormattedString());
    }
    @Test
    public void shouldReturnNullWhenNullBooleanIsSupplied() throws Exception {
      BooleanField field = new BooleanField(new HashMap<String, Object>(), _usLocale, _usLocale);
      field.setCurrentValue(null);

      assertNull(field.toFormattedString());
    }