Angular
Angular Signals, introduced in Angular 17 and stabilized in Angular 18, replace RxJS-heavy state management with fine-grained reactivity. Testing signals requires understanding when Angular flushes effects, how computed values are lazy, and how to assert on DOM updates triggered by signal changes. This guide covers all of it.
Internationalization
Angular's approach to internationalization creates a testing challenge: the default compile-time i18n bakes translations into the build, making runtime locale switching in unit tests awkward. This guide covers how to configure Angular TestBed for locale-aware testing, how to unit test locale-sensitive pipes, and how to
Angular
Playwright is the recommended E2E testing framework for Angular applications in 2026, replacing the deprecated Protractor. It supports auto-waiting, multi-browser testing, network interception, and trace capture out of the box. This guide covers adding Playwright to an Angular project, writing effective E2E tests, and deciding when to use
Angular
Spectator is an Angular testing library that wraps TestBed with a simpler, less verbose API. Instead of 20 lines of configureTestingModule, compileComponents, createComponent, and detectChanges, you get a one-liner factory that handles all of it. This guide covers the full Spectator API: createComponent, createService, SpyObject mocks, and event testing.
Angular
Angular services are the workhorses of Angular applications — they handle HTTP calls, state management, caching, and business logic. Testing services involves two main concerns: intercepting HTTP requests with HttpClientTestingModule, and isolating service dependencies with spy objects. For complex observable chains, RxJS marble testing gives you frame-level control over timing.
Angular
Angular component tests use TestBed to mount a component in a real Angular environment, then query the DOM to assert on rendered output and trigger user interactions. This guide covers the full component testing API: querying the DOM, testing @Input bindings, asserting on @Output events, handling ChangeDetectionStrategy.OnPush, and testing
Angular
TestBed is Angular's testing module — it creates a mini Angular application for each test suite, complete with dependency injection, component compilation, and the Angular zone. Understanding how to configure TestBed, provide mock services, and control async execution is the foundation of effective Angular testing. This guide goes deep
Angular
Angular ships with a complete testing setup: Jasmine as the test framework, Karma as the test runner, and TestBed as the Angular testing module that lets you configure and instantiate components and services the same way the Angular runtime does. For E2E tests, the Angular team now recommends Playwright over