@Test
public void should_return_a_valid_charset_at_rule_object() {

  StandardAtRule atRule = StandardAtRuleFactory.getByName("charset");
  assertEquals(Charset.class, atRule.getClass());
  assertEquals(atRule.getName(), "charset");
  assertEquals(atRule.getLinks().size(), 1);
  assertEquals(atRule.getLinks().get(0), "https://www.w3.org/TR/css-syntax-3/#charset-rule");
  assertEquals(atRule.isObsolete(), false);
  assertEquals(atRule.isExperimental(), false);
}