Add request test for fixing soft validation

spec/requests/form_controller_spec.rb

@@ -532,6 +532,33 @@ RSpec.describe FormController, type: :request do
             end
           end
         end
+
+        context "when the question was accessed from an interrution screen (soft validation)" do
+          let(:params) do
+            {
+              id: lettings_log.id,
+              lettings_log: {
+                page: page_id,
+                age1: 20,
+                interruption_page_id: "retirement_value_check",
+              },
+            }
+          end
+
+          before do
+            post "/lettings-logs/#{lettings_log.id}/#{page_id.dasherize}?referrer=interruption_screen", params:
+          end
+
+          it "redirects back to the soft validation page" do
+            expect(response).to redirect_to("/lettings-logs/#{lettings_log.id}/retirement-value-check")
+          end
+
+          it "displays a success banner" do
+            follow_redirect!
+            follow_redirect!
+            expect(response.body).to include("You have successfully updated lead tenant’s age")
+          end
+        end
       end
 
       context "with checkbox questions" do