@Test
public void createWithParameter() {

  assertEquals(ContentType.create("a/b;c=d"), ContentType.create(ContentType.create("a/b"), "c", "d"));
  assertEquals(ContentType.create("a/b;e=f;c=d"), ContentType.create(
      ContentType.create(ContentType.create("a/b"), "c", "d"), "e", "f"));
  assertEquals(ContentType.create("a/b;e=f;c=d"), ContentType.create(
      ContentType.create(ContentType.create("A/B"), "C", "D"), "E", "F"));
}