private fun assertCached(
    shouldWriteToCache: Boolean,
    responseCode: Int,
  ) {
    var expectedResponseCode = responseCode
    server = MockWebServer()
    val builder =
      MockResponse.Builder()
        .addHeader("Last-Modified: " + formatDate(-1, TimeUnit.HOURS))
        .addHeader("Expires: " + formatDate(1, TimeUnit.HOURS))
        .code(responseCode)
        .body("ABCDE")

    val proxy = authHeader.startsWith("Proxy-")
    val responseCode = if (proxy) 407 else 401
    val authenticator = RecordingAuthenticator(null)
    java.net.Authenticator.setDefault(authenticator)
    server.enqueue(
      MockResponse.Builder()
        .code(responseCode)
        .addHeader(authHeader)
        .body("Please authenticate.")
        .build(),
    )