How do I change the default “www.example.com” domain for testing in rails?

Question

I have a rails application which acts differently depending on what domain it\'s accessed at (for example www.myapp.com will invoke differently to user.myapp.com). In produc

Answer 1

I tried many variations of @request.host, host!, and post path, args, {'SERVER_NAME' => my_secret_domain} without success, both as controller tests and feature tests. Very aggravating, as so many others reported success with those approaches.

The solution for me was:

request.headers["SERVER_NAME"] = my_secret_domain
post path, args

I'm running ruby 2.1.5p273, rspec 3.1.7 and Rails 4.2.0

Answer 2

Another thing to remember is to make sure to use the correct session instance so that you can properly encapsulate the url helpers.

Integration tests provide you with a default session. You can call all session methods directly from your tests

test "should integrate well" do
  https!
  get users_path
  assert_response :success
end

All these helpers are using the default session instance, which if not changed, goes to "www.example.com". As has been mentioned the host can be changed by doing host!("my.new.host")

If you create multiple sessions using the open_session method, you must ALWAYS use that instance to call the helper methods. This will properly encapsulate the request. Otherwise rails will call the default session instance which may use a different host:

test "should integrate well" do
  sess = open_session
  sess.host! "my.awesome.host"
  sess.get users_url             #=> WRONG! will use default session object to build url.
  sess.get sess.users_url        #=> Correctly invoking url writer from my custom session with new host.
  sess.assert_response :success
end

If you intended to use the default session object, then you'll have to alter that host as well:

test "should integrate well" do
  sess = open_session
  sess.host! "my.awesome.host"
  host! sess.host              #=> Set default session host to my custom session host.
  sess.get users_url
end 

Answer 3

@request.host = 'user.myapp.com'

Answer 4

None of the ways suggested in other answers at the point worked for me. This worked:

Capybara.configure { |config| config.default_host = "my.domain.com" }