context 'array params with XML content type' do
    let(:single_element_request) do
      '<?xml version="1.0" encoding="UTF-8" ?>
       <admin>
         <products>
           <price>100</price>
         </products>
       </admin>'
    end

    let(:multiple_element_request) do
      '<?xml version="1.0" encoding="UTF-8" ?>
       <admin>
         <products>
           <price>100</price>
         </products>
         <products>
           <price>200</price>
         </products>
       </admin>'
    end

    before do
      subject.format :xml
      subject.content_type :xml, 'application/xml; charset=utf-8'
      subject.before do
        params[:admin][:products] = [params[:admin][:products]] unless params[:admin][:products].is_a?(Array)
      end
      subject.params do
        requires :admin, type: Hash do
          requires :products, type: Array do
            requires :price, type: Integer
          end
        end
      end
      subject.post do
        params[:admin][:products].map do |product|
          { price: product[:price] }
        end
      end
    end

    context 'with one element' do
      it 'returns a successful response' do
        post '/', single_element_request, 'CONTENT_TYPE' => 'application/xml'
        expect(last_response.status).to eq(201)
        expect(MultiXml.parse(last_response.body)).to eq('objects' => [{ 'price' => 100 }])
      end
    end

    context 'with multiple elements' do
      it 'returns a successful response' do
        post '/', multiple_element_request, 'CONTENT_TYPE' => 'application/xml'
        expect(last_response.status).to eq(201)
        expect(MultiXml.parse(last_response.body)).to eq('objects' => [{ 'price' => 100 }, { 'price' => 200 }])
      end
    end
  end