Angular · Middle · Question 69 of 75

How do you test an OnPush component after changing a signal input?

fixture.componentRef.setInput('user', mockUser);
fixture.detectChanges();

✓Correct answer: Use fixture.componentRef.setInput() and then detectChanges()
2Assign component.user = mockUser
3Signal inputs can't be set in tests

Explanation

Signal inputs are read-only from the class, and setInput goes through the same path as a parent binding, including OnPush marking.

Further reading

Angular: Basics of testing components ↗

Test yourself

Take the Angular · Middle quiz: questions and options are shuffled, and you get a review of your mistakes at the end.