Setting Up End-to-End Testing for Authentication
Understand how to set up comprehensive end-to-end tests for authentication in NestJS. Learn to initialize the full application, handle HTTP requests, configure environment variables properly for testing, and prepare isolated databases for consistent test results. This lesson helps ensure your authentication workflow works correctly throughout the entire system.
Our previous lesson focused on unit testing for AuthService. We’ll delve into end-to-end (E2E) testing for our AuthController. Unlike unit testing, which targets specific parts of our application, E2E testing examines the entire system workflow from top to bottom. In this lesson, we’ll thoroughly test the authentication process in our virtual library to ensure it functions as intended.
Default test in app.e2e-spec.ts
Let’s analyze the app.e2e-spec.ts file in the test folder provided by NestJS.
The beforeEach block in this E2E test may resemble what we’ve used in unit testing for auth.service.spec.ts, but there are crucial differences to note, especially in how we set up our NestJS application for testing:
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createNestApplication: This function constructs an instance of our NestJS application ( ...