How can I test lazy-loaded modules in Angular?

How can I test lazy-loaded modules in Angular?

To test lazy-loaded modules in Angular, you can use the Angular testing utilities along with Jasmine and Karma.

What are the steps to set up a test for a lazy-loaded module?

First, ensure your module is properly configured for lazy loading. Then, create a test file and import the necessary modules.

Can you provide a code example for testing a lazy-loaded module?

Sure! Here's a basic example:

import { TestBed } from '@angular/core/testing';
import { RouterTestingModule } from '@angular/router/testing';
import { MyLazyModule } from './my-lazy.module';

describe('MyLazyModule', () => {
  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [RouterTestingModule.withRoutes([]), MyLazyModule]
    });
  });

  it('should create the module', () => {
    const module = TestBed.inject(MyLazyModule);
    expect(module).toBeTruthy();
  });
});

What are some common pitfalls when testing lazy-loaded modules?

Common pitfalls include not properly configuring the router, failing to import necessary dependencies, and not cleaning up after tests.