Update custom-transform.spec.ts

Author: tbreug

test/functional/custom-transform.spec.ts

@@ -157,5 +157,63 @@ describe("custom transformation decorator", () => {
         objArg.should.be.equal(user);
         typeArg.should.be.equal(TransformationType.CLASS_TO_PLAIN);
     });
+    
+    let model: any;
+    it ('should serialize json into model instance of class Person', () => {
+        expect(() => {
+            const json = {
+                name: 'John Doe',
+                address: {
+                    street: 'Main Street 25',
+                    tel: '5454-534-645',
+                    zip: 10353,
+                    country: 'West Samoa'
+                },
+                age: 25,
+                hobbies: [
+                    { type: 'sport', name: 'sailing' },
+                    { type: 'relax', name: 'reading' },
+                    { type: 'sport', name: 'jogging' },
+                    { type: 'relax', name: 'movies'  }
+                ]
+            };
+            class Hobby {
+                public type: string;
+                public name: string;
+            }
+            class Address {
+                public street: string;
+                
+                @Expose({ name: 'tel' }) 
+                public telephone: string;
+                
+                public zip: number;
+                
+                public country: string;
+            }
+            class Person {
+                public name: string;
+                
+                @Type(() => Address)
+                public address: Address;
+                
+                @Type(() => Hobby)
+                @Transform(value => value.filter(hobby => hobby.type === 'sport'), { toClassOnly: true })
+                public hobbies: Hobby[];
+                
+                public age: number;
+            }
+            model = plainToClass(Person, json);
+            expect(model instanceof Person);
+            expect(model.address instanceof Address);
+            model.hobbies.forEach(hobby => expect(hobby instanceof Hobby && hobby.type === 'sport'));
+        }).not.toThrowError();
+    });
+    
+    it ('should serialize a model into json', () => {
+        expect(() => {
+            classToPlain(model);
+        }).not.toThrowError();
+    });
 
 });