Often when you are writing unit tests, you want to stub your IP address. Some of the uses cases could be – you are checking if IP is within the certain range. In this quick tutorial I want to show you how to stub ip in RSpec 3.x , and how it is different from stubbing IP using RSpec 2.x.

For RSpec 2.x  stubbing  IP would look like this:

ActionDispatch::Request.any_instance.stub(:remote_ip).and_return("192.168.0.1")

Taken from here

However, if you try to do it in RSpec 3.x, it will give you an error since ‘any_instance‘ syntax is deprecated.

To stub the IP  in RSpec 3.x use this:

 allow_any_instance_of(ActionDispatch::Request).to receive(:remote_ip).and_return("192.168.99.225")

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