Capybara, SSL and non-SSL pages tested via Selenium with javascript.

env.rb

instruction = <<-COMMENT
# Yo dawg, I heard you like tests that are easy to setup...
#
# Define domains "trainer.project.test login.project.test" in /etc/hosts
# to point to one of your local interface (probably 127.0.0.1)
#
# /etc/hosts:
# 192.168.50.1    trainer.project.test
# 192.168.50.1    login.project.test
#
# Define a mechanism that will proxy ssl requests from port 443 to port 80
# Define a mechanism that will proxy non-ssl request from port 80 to 8080
#
# It is simple with nginx
#
#  server {
#    listen 192.168.50.1:443 ssl;
#    server_name login.project.test;
#
#    ssl on;
#    ssl_certificate     /home/rupert/develop/trainer/config/environments/development/host.pem;
#    ssl_certificate_key /home/rupert/develop/trainer/config/environments/development/host.key;
#
#    location / {
#      proxy_pass http://192.168.50.1:80;
#      proxy_set_header Host $host;
#      proxy_set_header X-Real-IP $remote_addr;
#      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
#      proxy_set_header X-Forwarded-Proto https;
#    }
#  }
#
#  server {
#    listen 192.168.50.1:80;
#    server_name login.project.test;
#
#    location / {
#      proxy_pass http://192.168.50.1:8000;
#      proxy_set_header Host $host;
#      proxy_set_header X-Real-IP $remote_addr;
#      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
#    }
#  }
COMMENT

Capybara.server_port = 8000
Capybara.app_host = "https://login.project.test/"

require 'net/http'
require 'net/https'
require "uri"

begin
  # Test 80 => 8000
  # should fail with 502 because Capybara
  # has not started server yet but should be
  # connectable and host name should be properly
  # resolved
  uri       = URI.parse(Capybara.app_host)
  http      = Net::HTTP.new(uri.host, 80)
  request   = Net::HTTP::Get.new(uri.request_uri)
  response1 = http.request(request)
  raise instruction unless response1.code.to_s.start_with?("5")

  # Test 443 => 80
  # should fail in identical way but perform ssl unboxing
  http = Net::HTTP.new(uri.host, 443)
  http.use_ssl = true
  http.verify_mode = OpenSSL::SSL::VERIFY_NONE
  response2 = http.request(request)
  raise instruction unless response2.code.to_s.start_with?("5")
  raise instruction unless response1.body == response2.body

rescue Exception => exc
  puts exc
  raise instruction
end