Test-Driving JavaScript Applications

Testing vs. Verification

Using automated feedback loops doesn’t mean no manual testing.

It is not about automated instead of manual—we need the right combination of both. Let’s define two different terms that need to stand apart—testing and verification.

Testing is an act of gaining insights. Is the application usable? Is it intuitive, and what’s the user experience like? Does the workflow make sense? Are there steps that can be removed? Testing should raise these kinds of questions and provide insight into the key capabilities and limitations of an application.

Verification, on the other hand, is an act of confirmation. Does the code do what it’s supposed to do? Are the calculations right? Is the program working as expected after ...