Functional testing vs. regression testing: Why your team needs both
These terms often get used interchangeably, but functional testing and regression testing serve distinctly different purposes. Each has unique goals, different scopes, and different challenges. Understanding how they differ will help your team invest testing effort where it really matters, especially when scaling automated regression testing across your development pipeline.
Functional testing: Validate how a software functions
Functional testing answers one core question: Does your application do what it’s supposed to do?
When you run functional tests, you’re validating that specific features work correctly. You’re testing login flows, payment processing, search functionality, report generation, user workflows. You’re checking that when a user performs an action, the application responds the way the business requirements dictate. It’s about confirming that the software delivers on its intended promises.
Functional testing typically covers:
- Happy path scenarios (the expected flow through your application)
- User-facing features and their interactions
- Business logic and calculations
- Data validation and...
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