Add test.

Author: mshima

springdoc-openapi-webmvc-core/src/test/java/test/org/springdoc/api/app155/HelloController.java

@@ -40,5 +40,11 @@ public ResponseEntity<String> sayHello( @ParameterObject final ConcreteIntParame
 		return new ResponseEntity<String>("{\"Say\": \"Hello\"}", HttpStatus.OK);
 	}
 
+	@GetMapping( "/test3")
+	public ResponseEntity<String> sayHello( @ParameterObject final NestedParameterObject test) {
+		System.out.println("Field B = " + test);
+		return new ResponseEntity<String>("{\"Say\": \"Hello\"}", HttpStatus.OK);
+	}
+
 
 }

springdoc-openapi-webmvc-core/src/test/java/test/org/springdoc/api/app155/NestedParameterObject.java

@@ -0,0 +1,24 @@
+package test.org.springdoc.api.app155;
+
+public class NestedParameterObject {
+
+	ConcreteIntParameterObject concreteIntParameter;
+
+	ConcreteParameterObject concreteParameter;
+
+	public ConcreteIntParameterObject getConcreteIntParameter() {
+		return concreteIntParameter;
+	}
+
+	public void setConcreteIntParameter(ConcreteIntParameterObject concreteIntParameter) {
+		this.concreteIntParameter = concreteIntParameter;
+	}
+
+	public ConcreteParameterObject getConcreteParameter() {
+		return concreteParameter;
+	}
+
+	public void setConcreteParameter(ConcreteParameterObject concreteParameter) {
+		this.concreteParameter = concreteParameter;
+	}
+}

springdoc-openapi-webmvc-core/src/test/resources/results/app155.json

@@ -11,12 +11,91 @@
     }
   ],
   "paths": {
-    "/test2": {
+    "/test3": {
       "get": {
         "tags": [
           "hello-controller"
         ],
         "operationId": "sayHello",
+        "parameters": [
+          {
+            "name": "concreteIntParameter.primitiveConcreteField",
+            "in": "query",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "format": "int32"
+            }
+          },
+          {
+            "name": "concreteIntParameter.primitiveBaseField",
+            "in": "query",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "format": "int32"
+            }
+          },
+          {
+            "name": "concreteIntParameter.genericField",
+            "in": "query",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "format": "int32"
+            }
+          },
+          {
+            "name": "concreteParameter.primitiveConcreteField",
+            "in": "query",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "format": "int32"
+            }
+          },
+          {
+            "name": "concreteParameter.primitiveBaseField",
+            "in": "query",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "format": "int32"
+            }
+          },
+          {
+            "name": "concreteParameter.genericField",
+            "in": "query",
+            "required": false,
+            "schema": {
+              "type": "string",
+              "enum": [
+                "ONE",
+                "TWO"
+              ]
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK",
+            "content": {
+              "*/*": {
+                "schema": {
+                  "type": "string"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/test2": {
+      "get": {
+        "tags": [
+          "hello-controller"
+        ],
+        "operationId": "sayHello_1",
         "parameters": [
           {
             "name": "primitiveConcreteField",
@@ -65,7 +144,7 @@
         "tags": [
           "hello-controller"
         ],
-        "operationId": "sayHello_1",
+        "operationId": "sayHello_2",
         "parameters": [
           {
             "name": "primitiveConcreteField",