added 202 for synchronous render controller

lib/fizzy/api/endpoints/render_graph_synchronous.rb

@@ -18,6 +18,9 @@ module Fizzy
 
         def invalid_response(response)
           case response.code
+          when 202
+            raise Errors::OutcomeNotAvailableError, select_measurement_text(response,
+                                                                            'The results have not yet been calculated.')
           when 204
             raise Errors::TooFewMeasurementsError, select_measurement_text(response,
                                                                            'Not enough measurements available.')

spec/fizzy/api/endpoints/render_graph_synchronous_spec.rb

@@ -30,6 +30,20 @@ module Fizzy
         end
 
         describe 'error handling' do
+          it 'should notice a 202' do
+            allow(response).to receive(:code).and_return 202
+            expect(session).to receive(:get)
+              .with("/dossier/#{dossier_id}/protocol_subscriptions/#{protocol_subscription_id}/render_sync/#{path}", options)
+              .and_return(response)
+            outcome = lambda do
+              described_class.run! dossier_id: dossier_id,
+                                   protocol_subscription_id: protocol_subscription_id,
+                                   path: path,
+                                   options: options
+            end
+            expect { outcome.call }.to raise_error(Errors::OutcomeNotAvailableError)
+          end
+
           it 'should notice a 204' do
             allow(response).to receive(:code).and_return 204
             expect(session).to receive(:get)