.buildOrThrow();
    ImmutableSet<String> uppercaseAcronyms =
        ImmutableSet.of(
            "CH", "ID", "DNT", "DNS", "DPR", "ECT", "HTTP2", "IP", "MD5", "P3P", "RTT", "TE", "UA",
            "UID", "URL", "WWW", "XSS");
    assertConstantNameMatchesString(HttpHeaders.class, specialCases, uppercaseAcronyms);
  }

  // Visible for other tests to use

            .buildOrThrow();
    ImmutableSet<String> uppercaseAcronyms =
        ImmutableSet.of(
            "CH", "ID", "DNT", "DNS", "DPR", "ECT", "GPC", "HTTP2", "IP", "MD5", "P3P", "RTT", "TE",
            "UA", "UID", "URL", "WWW", "XSS");
    assertConstantNameMatchesString(HttpHeaders.class, specialCases, uppercaseAcronyms);
  }

  // Visible for other tests to use

                  throw new RuntimeException(e);
                }
              }
            });
  }

  public void testCreate_invalidType() {
    try {
      MediaType.create("te><t", "plaintext");
      fail();
    } catch (IllegalArgumentException expected) {
    }
  }

  public void testCreate_invalidSubtype() {
    try {
      MediaType.create("text", "pl@intext");

                  throw new RuntimeException(e);
                }
              }
            });
  }

  public void testCreate_invalidType() {
    try {
      MediaType.create("te><t", "plaintext");
      fail();
    } catch (IllegalArgumentException expected) {
    }
  }

  public void testCreate_invalidSubtype() {
    try {
      MediaType.create("text", "pl@intext");

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   * Service-Worker}</a> header field name.
   *
   * @since 20.0
   */
  public static final String SERVICE_WORKER = "Service-Worker";
  /** The HTTP {@code TE} header field name. */
  public static final String TE = "TE";
  /** The HTTP {@code Upgrade} header field name. */
  public static final String UPGRADE = "Upgrade";
  /**