chore: improves empty object json field tests (#2207)

test/fields/int.spec.ts

@@ -535,7 +535,7 @@ describe('Fields', () => {
         },
       });
 
-      expect(createdJSON.json.state).toBeDefined();
+      expect(createdJSON.json.state).toEqual({});
     });
   });
 

test/globals/int.spec.ts

@@ -70,7 +70,7 @@ describe('globals', () => {
         },
       });
 
-      expect(createdJSON.json.state).toBeDefined();
+      expect(createdJSON.json.state).toEqual({});
     });
 
     it('should create', async () => {