Apr 13, 2017 — When a unit tests fail, the goal is to know which unit of your code is failing. Imagine the situation where you have class A that has method a1, a2, .... How to Mock by extending classes and overriding functions. ... export class LoginComponent { constructor(private auth: AuthService) { } needsLogin() ... A Spy is a feature of Jasmine which lets you take an existing class, function, or object and .... Oct 15, 2019 — JavaScript import/require module testing do