}
    assertThat(event.t.javaClass).isEqualTo(cls)
    assertThat(event.t.message).isEqualTo(message)
  }

  /** Expose this recorder as a frame callback and shim in "ping" events.  */
  fun asFrameCallback() =
    object : WebSocketReader.FrameCallback {
      override fun onReadMessage(text: String) {
        events.add(Message(string = text))
      }

      override fun onReadMessage(bytes: ByteString) {