An introduction to software testing

Testing is one of the most debated topics among developers. Should you follow Test-Driven Development (TDD) or Behavior-Driven Development (BDD)? What exactly qualifies as a unit test? What level of code coverage is acceptable? Is code coverage really a relevant metric? Are E2E tests necessary? Should testing be done locally or in a remote environment? And most importantly, how can you ensure your testing environments reliably replicate production?

If you’ve ever grappled with these questions, you’re not alone. Testing can be a contentious subject, but it remains a fundamental part of software development.

To understand its importance, consider an alternative reality where systems are deployed without any testing. You write some code, push it to production, and move on. It might seem efficient… until you receive a call at 3 A.M. because something is broken. Now you’re having to get out of bed to diagnose and fix...