Drop-in utility to test your app subdomains with Capybara, Rspec, and a Javascript driver (Poltergeist, Webkit, or Selenium)

subdomains.rb

# Support for Rspec / Capybara subdomain integration testing
# Make sure this file is required by spec_helper.rb
# (e.g. save as spec/support/subdomains.rb)
 
def switch_to_subdomain(subdomain)
  # lvh.me always resolves to 127.0.0.1
  hostname = subdomain ? "#{subdomain}.lvh.me" : "lvh.me"
  Capybara.app_host = "http://#{hostname}"
end

def switch_to_main_domain
  switch_to_subdomain nil
end
 
RSpec.configure do |config|
  switch_to_main_domain
end

Capybara.configure do |config|
  config.always_include_port = true
end

subdomains_spec.rb

# Sample spec file
require 'spec_helper'

describe "Subdomains", js: true do

  it "should test subdomain" do
    switch_to_subdomain("mysubdomain")
    visit root_path
  end

end

describe "Main domain", js: true do

  it "should test the primary domain" do
    switch_to_main_domain
    visit root_path
  end

end

@yazinsai standard is to keep them under spec/support and use this
Dir[Rails.root.join('spec/support/**/*.rb')].each { |f| require f }
in rails_helper.rb to require the files :)

This is great - any ideas how to do this without using a service url like lvh.me? We don't want to rely on an external dns resolution for our tests.

thank you so much, you saved my life.

@turadg how about replacing

RSpec.configure do |config|
  switch_to_main_domain
end

Capybara.configure do |config|
  config.always_include_port = true
end

with

Capybara.always_include_port = true
Capybara.default_host = 'http://lvh.me'

?