Support for Rspec / Capybara subdomain integration testing

subdomains.rb

# Support for Rspec / Capybara subdomain integration testing
# Make sure this file is required by spec_helper.rb
#  
# Sample subdomain test: 
# it "should test subdomain" do
#   switch_to_subdomain("mysubdomain")
#   visit root_path
# end

DEFAULT_HOST = "lvh.me"
DEFAULT_PORT = 9887

RSpec.configure do |config|
  Capybara.default_host = "http://#{DEFAULT_HOST}"
  Capybara.server_port = DEFAULT_PORT
  Capybara.app_host = "http://#{DEFAULT_HOST}:#{Capybara.server_port}"
end

def switch_to_subdomain(subdomain)
   Capybara.app_host = "http://#{subdomain}.#{DEFAULT_HOST}:#{DEFAULT_PORT}"
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

Great idea! 👍

After some testing, I found that the port wasn't necessary if you use Capybara's always_include_port option. Here's a version that does that instead, and has a method to switch back to the main domain (which is now necessary to specify at the top of a non-subdomain spec since it will run with others in a suite):

https://gist.github.com/turadg/5399790

Thanks, your code saved me!!

@rtekie why would one need to wrap the setters with RSpec.configure here?

For me it doesn't work, only if I change app_host each test, it works. :(

On before suite -> does not work
On before all -> does not work
on before each -> works

Why?

This is brilliant, thanks for sharing!