```ruby
require 'rails_helper'

RSpec.describe CardsController, type: :controller do

end
```

Add pending tests for cards controller
user
```ruby
require 'rails_helper'

RSpec.describe CardsController, type: :controller do

  descripe 'POST create' do
    describe 'If all the necessary params are included and valid' do
      xit 'Creates a new card' do

      end

      xit 'Reloads the page with the flag to enable checkout' do

      end

    describe 'If there are problems with the parmams' do
      xit 'Rerenders the page with an error' do

      end

      xit 'Autofills the fields with the existing input' do

      end
    end
  end
end
```
assistant