).setHeader("content-type", "text/event-stream")
        .build(),
    )
    listener.enqueueCancel() // Will cancel in onOpen().
    newEventSource()
    listener.assertOpen()
    listener.assertFailure("canceled")
  }

  @Test
  fun badContentType() {
    server.enqueue(
      MockResponse.Builder()
        .body(
          """
          |data: hey
          |
          |