NG Interview Set I - Testing Questions

Question 1

What is Protractor?

Answer 1

• E2E (end-to-end) testing framework

Question 2

What is Karma?

Answer 2

• Unit test testing library

Question 3

What are spec files?

Answer 3

• Jasmine unit test files

Question 4

What is TestBed?

Answer 4

• Class to create testable component fixtures

Question 5

What does detectChanges do in Angular jasmine tests?

Answer 5

• propagates changes to the DOM by running Angular change detection

Question 6

Why would you use a spy in a test?

Answer 6

• To verify a particular value was returned or a method was called, for example when calling a service