How to test login from multiple IPs in Rails

Question

At the request of the client, I had to send a notification message each time the application detects two active sessions for the same user from different IP addresses. How do you test this?

Answer 1

Created integration test / integration / multiple_ip_test.rb

require 'test_helper' @@default_ip = "127.0.0.1" class ActionController::Request def remote_ip @@default_ip end end class MultipleIpTest < ActionDispatch::IntegrationTest fixtures :all test "send email notification if login from different ip address" do post_via_redirect login_path, :user => {:username => "john", :password => "test"} assert_equal "/users/john", path reset! @@default_ip = "200.1.1.1" post_via_redirect login_path, :user => {:username => "john", :password => "test"} assert_equal "/users/john", path assert_equal 1, ActionMailer::Base.deliveries.size end end 

Integration tests are very similar to functional tests, but there are some differences. You cannot use @request to change the source IP address. This is why I had to open the ActionController::Request class and override the remote_ip method.

Since the response to post_via_redirect always 200, instead of using assert_response :redirect I use the URL to verify that the user has successfully logged in.

Call reset! required to start a new session.

To familiarize yourself with integration tests, check the Rails Guides when testing, unfortunately, they do not mention the reset! method reset! .

Answer 2

Assuming you are using some kind of infrastructure to log in, for example devise, the following command will get the IP address of the computer that remotely accesses your application:

 request.remote_ip 

You will need to store the used IP addresses in the model, then you can easily determine if they have access from different IP addresses.