@Test public void testEquals() {

    assertThat(WikiSite.forLanguageCode("en"), is(WikiSite.forLanguageCode("en")));
    assertThat(WikiSite.forLanguageCode("ta"), not(WikiSite.forLanguageCode("en")));
    assertThat(WikiSite.forLanguageCode("ta").equals("ta.wikipedia.org"), is(false));
}