Testing Angular routing components with RouterTestingHarness, provideLocationMocks, and provideRouter

A guide to writing integrated routing component tests in Angular using modern standalone APIs. Covers RouterTestingHarness (Angular 15.2), provideRouter (Angular 14.2), and provideLocationMocks (Angular 15.0) as replacements for the older RouterTestingModule.withRoutes pattern. Includes a full working example testing the DashboardComponent from the Tour of Heroes tutorial, demonstrating how to set up the test module, navigate with RouterTestingHarness.navigateByUrl, and assert on location changes after user interactions.