AutomatedTesting

Automated Testing

The core reason for automated testing is to prevent having to manually test everything and in the process save precious development time.

Tools

• Jest - A tool for automated testing of JavaScript code:
  • most popular testing tool for JavaScript
  • easy setup with minimal configuration
  • fast and supports live reloading
  • config file created with npx jest --init
• Playwright - A tool for automated testing of web pages.

Types of Testing

• Unit - Tests isolated code and individual functions.
• Integration - Tests whole microservices.
• End-To-End - Tests groups of microservices and/or the entire application including the front end.

End Goal

Automated testing together with a CI/CD pipeline will function like an early warning system that prevents problems going into production and impacting customers.

Unit Testing Microservices

Testing a single unit of code (function/aspect within a function) in isolation to the rest of the src code.

The isolation can be achieved through mocking other dependencies, allowing our unit tests to focus on a specific test and run lightning fast.