RSpec.shared_examples 'url validator examples' do |protocols|
  let(:validator) { described_class.new(attributes: [:link_url],  **options) }
  let!(:badge) { build(:badge, link_url: 'http://www.example.com') }

  subject { validator.validate_each(badge, :link_url, badge.link_url) }

  describe '#validates_each' do
    context 'with no options' do
      let(:options) { {} }

      it "allows #{protocols.join(',')} protocols by default" do
        expect(validator.send(:default_options)[:protocols]).to eq protocols
      end

      it 'checks that the url structure is valid' do
        badge.link_url = "#{badge.link_url}:invalid_port"

        subject

        expect(badge.errors.empty?).to be false
      end
    end

    context 'with protocols' do
      let(:options) { { protocols: %w[http] } }

      it 'allows urls with the defined protocols' do
        subject

        expect(badge.errors.empty?).to be true
      end

      it 'add error if the url protocol does not match the selected ones' do
        badge.link_url = 'https://www.example.com'

        subject

        expect(badge.errors.empty?).to be false
      end
    end
  end
end