Add test case : arbitraryObjectResponse

modules/openapi-generator/src/test/java/org/openapitools/codegen/InlineModelResolverTest.java

@@ -540,6 +540,24 @@ public void arbitraryRequestBodyArrayProperty() {
         assertTrue(referencedSchema.getProperties().get("arbitrary_request_body_array_property") instanceof ObjectSchema);
     }
 
+    @Test
+    public void arbitraryObjectResponse() {
+        OpenAPI openAPI = new OpenAPIParser().readLocation("src/test/resources/3_0/inline_model_resolver.yaml", null, new ParseOptions()).getOpenAPI();
+        new InlineModelResolver().flatten(openAPI);
+
+        MediaType mediaType = openAPI
+                .getPaths()
+                .get("/arbitrary_object_response")
+                .getGet()
+                .getResponses()
+                .get("200")
+                .getContent()
+                .get("application/json");
+
+        assertTrue(mediaType.getSchema() instanceof ObjectSchema);
+        assertNull(mediaType.getSchema().getProperties());
+    }
+
 /*
     @Test
     public void testArbitraryObjectResponse() {

modules/openapi-generator/src/test/resources/3_0/inline_model_resolver.yaml

@@ -205,6 +205,16 @@ paths:
       responses:
         '200':
           description: OK
+  /arbitrary_object_response:
+    get:
+      operationId: arbitraryObjectResponse
+      responses:
+        '200':
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: object
 components:
   schemas:
     Users: