# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Oauth::AuthorizationsController, feature_category: :system_access do
  let_it_be(:user) { create(:user) }
  let_it_be(:application) { create(:oauth_application, redirect_uri: 'custom://test') }
  let_it_be(:oauth_authorization_path) do
    Gitlab::Routing.url_helpers.oauth_authorization_url(
      client_id: application.uid,
      response_type: 'code',
      scope: application.scopes,
      redirect_uri: application.redirect_uri,
      state: SecureRandom.hex
    )
  end

  before do
    sign_in(user)
  end

  describe 'GET #new' do
    it_behaves_like 'Base action controller' do
      subject(:request) { get oauth_authorization_path }
    end

    context 'when application redirect URI has a custom scheme' do
      context 'when CSP is disabled' do
        before do
          allow_next_instance_of(ActionDispatch::Request) do |instance|
            allow(instance).to receive(:content_security_policy).and_return(nil)
          end
        end

        it 'does not add a CSP' do
          get oauth_authorization_path

          expect(response.headers['Content-Security-Policy']).to be_nil
        end
      end

      context 'when CSP contains form-action' do
        before do
          csp = ActionDispatch::ContentSecurityPolicy.new do |p|
            p.form_action "'self'"
          end

          allow_next_instance_of(ActionDispatch::Request) do |instance|
            allow(instance).to receive(:content_security_policy).and_return(csp)
          end
        end

        it 'adds custom scheme to CSP form-action' do
          get oauth_authorization_path

          expect(response.headers['Content-Security-Policy']).to include("form-action 'self' custom:")
        end
      end

      context 'when CSP does not contain form-action' do
        before do
          csp = ActionDispatch::ContentSecurityPolicy.new do |p|
            p.script_src :self, 'https://some-cdn.test'
            p.style_src :self, 'https://some-cdn.test'
          end

          allow_next_instance_of(ActionDispatch::Request) do |instance|
            allow(instance).to receive(:content_security_policy).and_return(csp)
          end
        end

        it 'does not add form-action to the CSP' do
          get oauth_authorization_path

          expect(response.headers['Content-Security-Policy']).not_to include('form-action')
        end
      end
    end
  end
end