```ruby
require 'test_helper'

module Backend
  class ActivitiesControllerTest < ActionController::TestCase
    test_restfully_all_actions family: { mode: :index, name: :mussel_farming, format: :json }
  end
end
```

Update activities controller test show
user
```ruby
require 'test_helper'

module Backend
  class ActivitiesControllerTest < ActionController::TestCase
    test_restfully_all_actions family: { mode: :index, name: :mussel_farming, format: :json }, except: :show

    test 'show action' do
      get :show, {:id=>"NaID", :redirect=>root_url, :locale=>@locale}
      assert_redirected_to root_url
      Activity.limit(5).find_each do |record|
        get :show, {:id=>record.id, :locale=>@locale}
        if record.vegetal_crops?
          assert_redirected_to backend_vegetal_activity_url(record)
        else
          assert_response :success
          assert_not_nil assigns(:activity)
        end
      end
    end

  end
end
```
assistant