}

  @Test
  fun hostnameMappingLastDisallowedCodePoint() {
    assertInvalid("http://\uDBFF\uDFFF", "Invalid URL host: \"\uDBFF\uDFFF\"")
  }

  @Test
  fun hostnameUri() {
    // Host names are special:
    //
    //  * Several characters are forbidden and must throw exceptions if used.
    //  * They don't use percent escaping at all.
    //  * They use punycode for internationalization.

     * system defaults will be used.
     *
     * Most applications should not call this method, and instead use the system defaults. Those
     * classes include special optimizations that can be lost if the implementations are decorated.
     *
     * If necessary, you can create and configure the defaults yourself with the following code:
     *
     * ```java

    reading the full response body. If a call requires redirects or retries all must complete within
    one timeout period.

    Use `OkHttpClient.Builder.callTimeout()` to specify the default duration and `Call.timeout()` to
    specify the timeout of an individual call.

 *  New: Return values and fields are now non-null unless otherwise annotated.

    assertThat(connection.writer.maxDataLength()).isEqualTo(newMaxFrameSize)
  }

  /**
   * Webservers may set the initial window size to zero, which is a special case because it means
   * that we have to flush headers immediately before any request body can be sent.
   * https://github.com/square/okhttp/issues/2543
   */
  @Test fun peerSetsZeroFlowControl() {