Testing Angular Auth Services with HttpClientTestingModule

Testing authentication flows is critical to securing modern web applications, yet mocking HTTP requests often feels overly complex. This text-based course guides you step-by-step through setting up and testing an Angular signup service without hitting a live backend. You will learn how to isolate your service logic, mock server responses, and handle errors gracefully. What you'll learn: Understand the foundational concepts of dependency injection and HTTP mocking in Angular. Configure HttpClientTestingModule to simulate network requests in a controlled environment. Write isolated unit tests with Jasmine to verify signup payloads and headers. Handle successful authentication responses and manage HTTP error states. Apply modern Angular testing practices, including async/await and clean test setup patterns. We begin with core concepts and basic test configurations before moving on to practical testing scenarios for signup and authentication flows. This course is designed for beginner to intermediate Angular developers who want to write reliable unit tests for their API integrations; no advanced testing experience is required. Start building robust, well-tested Angular services today.