fun dnsFailureThrowsIOException() {
    client =
      client
        .newBuilder()
        .dns(FakeDns())
        .build()
    assertFailsWith<IOException> {
      getResponse(Request("http://host.unlikelytld".toHttpUrl()))
    }
  }

  @Test
  fun malformedUrlThrowsUnknownHostException() {
    assertFailsWith<IOException> {
      getResponse(Request("http://-/foo.html".toHttpUrl()))
    }
  }