How to mock an @INPUT value in tests for angular component

Question

In my angular app, I am writing a testcase for a component which has @Input value. How can I mock the @Input value. The main component's testSave() method uses subComponent's InputObject's id. When I run the testcase it says undefined is an object at 'this.subComponent.InputObject.id;'

export class SubComponent implements OnInit {
  @Input() inputObj: InputObject;
}

export class MainComponent implements OnInit {
  @Input() subComponent: SubComponent;

  testsave() {
  this.subComponent.InputObject.id;
  }
}

export class InputObject {
  contructor(id:string, name: string)
}

TestCase:

 it('should save', fakeAsync(()  => {
//     const event: MockEvent = new MockEvent();
//     fixture = TestBed.createComponent(MainComponent);
//     component = fixture.componentInstance;
 });

Liam · Accepted Answer · 2019-05-23 13:37:45Z

6

Since subComponent and inputObj are public you can simply override it, if you test MainComponent you can have something like:

component.subComponent = {inputObj: {id: 'someId', name :'someName'}};

edited May 23, 2019 at 13:37

Liam

30k28 gold badges143 silver badges206 bronze badges

answered Jun 20, 2018 at 21:41

Buczkowski

2,41614 silver badges19 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to mock an @INPUT value in tests for angular component

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related