Add a spec for #342 body/required

test-app/app/controllers/stubs_controller.rb

@@ -3,6 +3,10 @@ class StubsController < ApplicationController
     render plain: 'OK'
   end
 
+  def create
+    render plain: 'OK'
+  end
+
   def show
     render plain: 'OK'
   end

test-app/spec/integration/openapi3_spec.rb

@@ -181,7 +181,28 @@ RSpec.describe 'Generated OpenApi', type: :request, swagger_doc: 'v3/openapi.jso
     # TODO: Common Parameters
   end
 
-  describe 'Request Body'
+  describe 'Request Body' do
+    path '/stubs' do
+      post 'body is required' do
+        tags 'Media Types'
+        consumes 'multipart/form-data'
+        parameter name: :file, :in => :formData, :type => :file, required: true
+
+        let(:file) { Rack::Test::UploadedFile.new(Rails.root.join("spec/fixtures/thumbnail.png")) }
+
+        response '200', 'OK' do
+          run_test!
+
+          it 'declares requestBody is required' do
+            pending "This output is massaged in SwaggerFormatter#stop, and isn't quite ready here to assert"
+            tree = swagger_doc.dig(:paths, "/stubs", :post, :requestBody)
+            expect(tree[:required]).to eq(true)
+          end
+        end
+      end
+    end
+  end
+
   describe 'Responses'
   describe 'Data Models (Schemas)'
   describe 'Examples'

test-app/swagger/v3/openapi.json

@@ -22,6 +22,30 @@
             "in": "query"
           }
         ]
+      },
+      "post": {
+        "summary": "body is required",
+        "tags": [
+          "Media Types"
+        ],
+        "parameters": [
+
+        ],
+        "responses": {
+          "200": {
+            "description": "OK"
+          }
+        },
+        "requestBody": {
+          "content": {
+            "multipart/form-data": {
+              "schema": {
+                "type": "file"
+              }
+            }
+          },
+          "required": true
+        }
       }
     },
     "/stubs/{a_param}": {