.addHeader("Cache-Control: max-age=0")
        .addHeaderLenient("Alpha", "α")
        .addHeaderLenient("β", "Beta")
        .body("abcd")
        .build(),
    )
    server.enqueue(
      MockResponse
        .Builder()
        .addHeader("Transfer-Encoding: none")
        .addHeaderLenient("Gamma", "Γ")
        .addHeaderLenient("Δ", "Delta")
        .code(HttpURLConnection.HTTP_NOT_MODIFIED)

  @Test
  fun responseHeaderParsingIsLenient() {
    val headersBuilder = Headers.Builder()
    headersBuilder.add("Content-Length", "0")
    addHeaderLenient(headersBuilder, "a\tb: c\u007fd")
    addHeaderLenient(headersBuilder, ": ef")
    addHeaderLenient(headersBuilder, "\ud83c\udf69: \u2615\ufe0f")
    val headers = headersBuilder.build()
    server.enqueue(MockResponse(headers = headers))

    mockResponse = mockResponse.clearHeaders()
    mockResponse = mockResponse.addHeader("")
    mockResponse = mockResponse.addHeader("", "")
    mockResponse = mockResponse.addHeaderLenient("", Any())
    mockResponse = mockResponse.setHeader("", Any())
    mockResponse.headers = headersOf()
    mockResponse.trailers = headersOf()
    mockResponse = mockResponse.removeHeader("")

  }

  @Test
  fun nonAsciiResponseHeader() {
    server.enqueue(
      MockResponse
        .Builder()
        .addHeaderLenient("Alpha", "α")
        .addHeaderLenient("β", "Beta")
        .build(),
    )
    val call = client.newCall(Request(server.url("/")))
    val response = call.execute()
    response.close()