require 'spec_helper'

shared_examples 'a builder that adds a resource for route' do |route|
  let(:params)   { {} }
  let(:instance) { clazz.new(params) }
  let(:value)    { instance.public_send("#{route}_resource") }

  it "adds #{route}_resource" do
    expect { subject.build }
      .to change { clazz.new.respond_to?(:"#{route}_resource") }
      .from(false).to(true)
  end

  it "#{route}_resource responds with correct resource" do
    subject.build
    expect(value.to_json).to eq(expected.to_json)
  end
end

describe Azeroth::Resourceable::Builder do
  subject { described_class.new(clazz, :document) }

  let(:name) { 'The Doc' }
  let(:document_params) { { name: name } }

  let(:clazz) do
    Class.new(Controller) do
    end
  end

  describe '#build' do
    describe 'index_resource' do
      it_behaves_like 'a builder that adds a resource for route', :index do
        let(:expected) { Document.all }
      end
    end

    describe 'new_resource' do
      it_behaves_like 'a builder that adds a resource for route', :new do
        let(:expected) { Document.new }
      end
    end

    describe 'create_resource' do
      it_behaves_like 'a builder that adds a resource for route', :create do
        let(:expected) { Document.last }
        let(:params) { { document: document_params } }

        it 'creates the resource' do
          subject.build
          expect do
            instance.create_resource
          end.to change(Document, :count).by(1)
        end
      end
    end

    describe 'show_resource' do
      let(:document) { Document.create }

      it_behaves_like 'a builder that adds a resource for route', :show do
        let(:expected) { document }
        let(:params) { { id: document.id } }
      end
    end

    describe 'update_resource' do
      let!(:document) { Document.create }

      it_behaves_like 'a builder that adds a resource for route', :update do
        let(:expected) { Document.find(document.id) }
        let(:params) { { id: document.id, document: document_params } }

        context 'after the methods has been built' do
          before { subject.build }

          it 'updates the resource the resource' do
            expect do
              instance.update_resource
            end.to change { document.reload.name }.to(name)
          end

          it 'does not create the resource' do
            expect do
              instance.update_resource
            end.not_to change(Document, :count)
          end
        end
      end
    end
  end
end