val bytes = binaryData(200)
    data.write("0264".decodeHex()).write(bytes, 0, 100)
    data.write("8064".decodeHex()).write(bytes, 100, 100)
    clientReader.processNextFrame()
    callback.assertBinaryMessage(bytes)
  }

  @Test fun twoFrameNotContinuation() {
    val bytes = binaryData(200)
    data.write("0264".decodeHex()).write(bytes, 0, 100)
    data.write("8264".decodeHex()).write(bytes, 100, 100)

  private var maxFrameSize: Int = INITIAL_MAX_FRAME_SIZE
  private var closed: Boolean = false
  val hpackWriter: Hpack.Writer = Hpack.Writer(out = hpackBuffer)

  @Throws(IOException::class)
  fun connectionPreface() {
    this.withLock {
      if (closed) throw IOException("closed")
      if (!client) return // Nothing to write; servers don't send connection headers!
      if (logger.isLoggable(FINE)) {

    client.webSocket!!.close(1000, "Hello")
    server.processNextFrame()
    // Not closed until close reply is received.
    assertThat(client.closed).isFalse()

    // Manually write an invalid masked close frame.
    server.sink.write("888760b420bb635c68de0cd84f".decodeHex()).emit()
    client.processNextFrame() // Detects error, disconnects immediately since close already sent.
    client.webSocket!!.finishReader()

    // Use a new Writer because we don't support change the dynamic table
    // size after Writer constructed.
    val writer = Hpack.Writer(110, false, bytesOut)
    writer.writeHeaders(headerBlock)
    assertThat(bytesOut).isEqualTo(bytesIn)
    assertThat(writer.headerCount).isEqualTo(2)
    val tableLength = writer.dynamicTable.size
    var entry = writer.dynamicTable[tableLength - 1]!!

            bytes = bytes,
          )
        }
      }

      override fun toDer(
        writer: DerWriter,
        value: AnyValue,
      ) {
        writer.write("ANY", value.tagClass, value.tag) {
          writer.writeOctetString(value.bytes)
          writer.constructed = value.constructed
        }
      }
    }

  internal fun parseGeneralizedTime(string: String): Long {

But if you want to use `async` / `await` without FastAPI, you can do it as well.

### Write your own async code

            bytesRead = source.read(sink, byteCount)
          } catch (e: IOException) {
            if (!cacheRequestClosed) {
              cacheRequestClosed = true
              cacheRequest.abort() // Failed to write a complete cache response.
            }
            throw e
          }

          if (bytesRead == -1L) {
            if (!cacheRequestClosed) {
              cacheRequestClosed = true

    taskFaker.runTasks()
  }

  private fun connectHttp2(
    peer: MockHttp2Peer,
    realConnection: RealConnection,
    maxConcurrentStreams: Int,
  ): Http2Connection {
    // Write the mocking script.
    val settings1 = Settings()
    settings1[Settings.MAX_CONCURRENT_STREAMS] = maxConcurrentStreams
    peer.sendFrame().settings(settings1)
    peer.acceptFrame() // ACK

      val body = part.body

      sink!!.write(DASHDASH)
      sink.write(boundaryByteString)
      sink.write(CRLF)

      if (headers != null) {
        for (h in 0 until headers.size) {
          sink.writeUtf8(headers.name(h))
            .write(COLONSPACE)
            .writeUtf8(headers.value(h))
            .write(CRLF)
        }
      }

     ```

 *  New: `Cache.initialize()`. Call this on a background thread to eagerly
    initialize the response cache.
 *  New: Fold `MockWebServerRule` into `MockWebServer`. This makes it easier to
    write JUnit tests with `MockWebServer`. The `MockWebServer` library now
    depends on JUnit, though it continues to work with all testing frameworks.
 *  Fix: `FormEncodingBuilder` is now consistent with browsers in which