Rails minitest devise error

Question

I'm currently working on my first tests but I'm stuck with a problem I can't seem to fix by myself. I've searched for solutions for some hours now and found similar errors but I didn't find any solution working in my case. Maybe it's because of a version difference, I don't know. The problem appears when I'm writing a unit test with minitest, maybe also integration tests. I'm using devise for managing users. This is there error that appears in the terminal when I `rake test`: ``` 1) Error: test_deactivate_enrolment(EnrolmentTest): NoMethodError: undefined method `env' for nil:NilClass /Users/myname/.rvm/gems/ruby-2.0.0-p353/gems/devise-3.0.3/lib/devise/test_helpers.rb:24:in `setup_controller_for_warden' /Users/myname/.rvm/gems/ruby-2.0.0-p353/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:429:in `_run__840473936918917337__setup__1779200460764756091__callbacks' /Users/myname/.rvm/gems/ruby-2.0.0-p353/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:405:in `__run_cal…

Accepted Answer

Only include the Devise helpers in your controller tests. Your `test_helper.rb` file should look like this:

```
ENV["RAILS_ENV"] = "test"
require File.expand_path("../../config/environment", __FILE__)
require "rails/test_help"

# To add Capybara feature tests add `gem "minitest-rails-capybara"`
# to the test group in the Gemfile and uncomment the following:
#require "minitest/rails/capybara"

# Uncomment for awesome colorful output
#require "minitest/pride"
require 'minitest/autorun'

class ActiveSupport::TestCase
  # Setup all fixtures in test/fixtures/*.(yml|csv) for all tests in alphabetical order.
  fixtures :all

# Add more helper methods to be used by all tests here...
end

class ActionController::TestCase
  include Devise::TestHelpers
end
```

Rails minitest devise error

Solution

Problem