```ruby
require 'spec_helper'

class ReadOnly
  class Policy
    def initialize(*_) ; end

    def show?
      true
    end

    def edit?
      false
    end
  end

  def policy_class
    Policy
  end
end

describe Supermarket::Authorization do
  subject do
    Class.new(ActionController::Base) do
      include Supermarket::Authorization
      def current_user; end
    end.new
  end

  let(:read_only_object) { ReadOnly.new }

  describe '#authorize!' do
    it 'raises an error if the user is not authorized' do
      subject.stub(:params).and_return(action: 'edit')

      expect { subject.authorize!(read_only_object) }
      .to raise_error(Supermarket::Authorization::NotAuthorizedError)
    end

    it 'does nothing with the user is authorized' do
      subject.stub(:params).and_return(action: 'show')
      expect { subject.authorize!(read_only_object) }.to_not raise_error
    end
  end
end
```

Adjust lib/supermarket/auth spec to please rubocop
user
```ruby
require 'spec_helper'

class ReadOnly
  class Policy
    def initialize(*_); end

    def show?
      true
    end

    def edit?
      false
    end
  end

  def policy_class
    Policy
  end
end

describe Supermarket::Authorization do
  subject do
    Class.new(ActionController::Base) do
      include Supermarket::Authorization
      def current_user; end
    end.new
  end

  let(:read_only_object) { ReadOnly.new }

  describe '#authorize!' do
    it 'raises an error if the user is not authorized' do
      subject.stub(:params).and_return(action: 'edit')

      expect { subject.authorize!(read_only_object) }
      .to raise_error(Supermarket::Authorization::NotAuthorizedError)
    end

    it 'does nothing with the user is authorized' do
      subject.stub(:params).and_return(action: 'show')
      expect { subject.authorize!(read_only_object) }.to_not raise_error
    end
  end
end
```
assistant