/** @see NounClassification#parse(String) */
  @Test
  public void parse_shouldParseString() {
    Assert.assertThat(NounClassification.parse("m"), is(NounClassification.MALE));
    Assert.assertThat(NounClassification.parse("f"), is(NounClassification.FEMALE));
    Assert.assertThat(NounClassification.parse("n"), is(new NounClassification(Gender.NEUTER)));

    Assert.assertThat(NounClassification.parse("c1"), is(new NounClassification(1)));
    Assert.assertThat(NounClassification.parse("c2"), is(new NounClassification(2)));
  }
 /** @see NounClassification#parse(String) */
 @Test(expected = NullPointerException.class)
 public void parse_shouldThrowExceptionIfNull() {
   NounClassification.parse(null);
 }