test for transitive dereferencing

lib/services/schema-normalizer.service.spec.ts

@@ -93,9 +93,23 @@ describe('Spec Helper', () => {
         expect(resolved.items.$ref).toBeUndefined();
         resolved.type.should.be.equal('array');
         resolved._pointer.should.be.equal('#/definitions/Circular');
+      });
+
+      it('should remove _pointer when detect circularity', () => {
         expect(resolved.items._pointer).toBeUndefined();
         resolved.items.title.should.be.equal('Circular');
       });
+
+      it('should resolve transitive circular ref', () => {
+        let pointer = '/paths/test6/get/parameters/0';
+        resolved = normalizer.normalize(specMgr.byPointer(pointer), pointer);
+        expect(resolved.additionalProperties.$ref).toBeUndefined();
+        expect(resolved.additionalProperties.items.additionalProperties.$ref).toBeUndefined();
+        resolved.additionalProperties.type.should.be.equal('array');
+        resolved.additionalProperties._pointer.should.be.equal('#/definitions/CircularTransitive2');
+        expect(resolved.additionalProperties.items.additionalProperties._pointer).toBeUndefined();
+        resolved.additionalProperties.items.additionalProperties.title.should.be.equal('CircularTransitive');
+      });
     });
 
     describe('$ref with other fields on the same level', () => {

tests/schemas/base-component-dereference.json

@@ -35,6 +35,20 @@
       "items": {
         "$ref": "#/definitions/Circular"
       }
+    },
+    "CircularTransitive": {
+      "type": "object",
+      "additionalProperties": {
+        "$ref": "#/definitions/CircularTransitive2"
+      }
+    },
+    "CircularTransitive2": {
+      "type": "array",
+      "items": {
+        "additionalProperties": {
+          "$ref": "#/definitions/CircularTransitive"
+        }
+      }
     }
   },
   "paths": {
@@ -89,6 +103,18 @@
           }
         ]
       }
+    },
+    "test6": {
+      "get": {
+        "summary": "test get",
+        "parameters": [
+          {
+            "$ref": "#/definitions/CircularTransitive",
+            "title": "test",
+            "description": "test"
+          }
+        ]
+      }
     }
   }
 }