How to write unit test cases for private function of component in angular 9

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Inaam Husain Staff asked 3 years ago

Is there a way to write unit test cases for the private function of a component?
Here is my function, 


  private scrollToFirstInvalidControl() {
    const firstInvalidControl: HTMLElement = this.el.nativeElement.querySelector(
      "form .ng-invalid"
    );
    firstInvalidControl.focus(); //without smooth behavior
  }
 
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1 Answers
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Best Answer
Rehmaanali Staff answered 3 years ago

Yes, it is possible to write unit test cases for the private function of the component.
for your method, it will be tested as


beforeEach(() => {
  fixture = TestBed.createComponent(AuthContainerComponent);
  component = fixture.componentInstance;
  fixture.detectChanges();
});

it('should go to error field', () => {
  // arrange
  ...

  // act
  (component as any).scrollToFirstInvalidControl();

  //assert
  ....
});
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