How do I test Angular Auth Guards?

How do I test Angular Auth Guards?

To test Angular Auth Guards, you can use Jasmine and TestBed to create a testing module.

Can you show me a sample test case?

Sure! Here's a simple test case for an Auth Guard:

import { TestBed } from '@angular/core/testing';
import { Router } from '@angular/router';
import { AuthGuard } from './auth.guard';

describe('AuthGuard', () => {
  let guard: AuthGuard;
  let router: Router;

  beforeEach(() => {
    TestBed.configureTestingModule({
      providers: [AuthGuard, { provide: Router, useValue: { navigate: jasmine.createSpy('navigate') } }]
    });
    guard = TestBed.inject(AuthGuard);
    router = TestBed.inject(Router);
  });

  it('should return true if user is authenticated', () => {
    spyOn(guard, 'isAuthenticated').and.returnValue(true);
    expect(guard.canActivate()).toBeTrue();
  });

  it('should redirect to login if user is not authenticated', () => {
    spyOn(guard, 'isAuthenticated').and.returnValue(false);
    guard.canActivate();
    expect(router.navigate).toHaveBeenCalledWith(['/login']);
  });
});

What if I want to test a guard with route parameters?

You can pass route parameters in the canActivate method and test accordingly. Just mock the route parameters in your test.