.host("host")
        .username("=[]:;\"~|?#@^/$%*")
        .build()
    assertThat(url.toString())
      .isEqualTo("http://%3D%5B%5D%3A%3B%22~%7C%3F%23%40%5E%2F$%25*@host/")
    assertThat(url.toUri().toString())
      .isEqualTo("http://%3D%5B%5D%3A%3B%22~%7C%3F%23%40%5E%2F$%25*@host/")
  }

  @Test
  fun toUriPasswordSpecialCharacters() {
    val url =
      HttpUrl
        .Builder()

        } catch (NullPointerException e) {
            // Expected
        }
    }

    public void test_encodeUrl_unicode() {
        assertEquals("%3F", DocumentUtil.encodeUrl("あ"));
        assertEquals("%3F%3F%3F", DocumentUtil.encodeUrl("あいう"));
    }

    public void test_complex_document_structure() {
        Map<String, Object> doc = new HashMap<>();

        .query("i:\u0001@/\\?#%j")
        .fragment("k:\u0001@/\\?#%l")
        .build()
    assertThat(url.toString())
      .isEqualTo(
        "http://a%3A%01%40%2F%5C%3F%23%25b:c%3A%01%40%2F%5C%3F%23%25d@ef:8080/" +
          "g:%01@%2F%5C%3F%23%25h?i:%01@/\\?%23%25j#k:%01@/\\?#%25l",
      )
    assertThat(url.scheme).isEqualTo("http")
    assertThat(url.username).isEqualTo("a:\u0001@/\\?#%b")

    assertThat(formEncode(60)).isEqualTo("%3C")
    assertThat(formEncode(61)).isEqualTo("%3D")
    assertThat(formEncode(62)).isEqualTo("%3E")
    assertThat(formEncode(63)).isEqualTo("%3F")
    assertThat(formEncode(64)).isEqualTo("%40")
    assertThat(formEncode(65)).isEqualTo("A")
    assertThat(formEncode(90)).isEqualTo("Z")
    assertThat(formEncode(91)).isEqualTo("%5B")

   * Purpose}</a> header field name.
   *
   * @since 28.0
   */
  public static final String PURPOSE = "Purpose";

  /**
   * The HTTP <a
   * href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Link_prefetching_FAQ#As_a_server_admin.2C_can_I_distinguish_prefetch_requests_from_normal_requests.3F">{@code
   * X-Purpose}</a> header field name.
   *