mutable_role_spec.rb

gistfile1.rb

require 'rails_helper'

describe MutableRole do
  describe 'before_destroy' do
    context 'immutable roles' do

      let!(:admin) { MutableRole.create(name: 'admin') }
      let!(:moderator) { MutableRole.create(name: 'moderator') }
      let!(:member) { MutableRole.create(name: 'member') }

      it 'admin should be immutable' do
        expect { admin.destroy }.not_to change { MutableRole.count }
      end
      it 'moderator should be immutable' do
        expect { moderator.destroy }.not_to change { MutableRole.count }
      end
      it 'member should be immutable' do
        expect { member.destroy }.not_to change { MutableRole.count }
      end
    end

    context 'mutable roles' do

      let!(:foo) { MutableRole.create(name: 'foo') }

      it 'other roles should be mutable' do
        expect { foo.destroy }.to change { MutableRole.count }.by(-1)
      end
    end
  end
end