Boundary Value Analysis: Think Outside the Lines, Literally!

Let’s say you’re testing an app where users can enter their age, and the valid range is 18 to 60 years. Anything outside this range gets rejected—simple enough, right? But here’s the deal: most bugs love to party right at the boundaries. Testing only the middle values (like 30 or 40) won’t catch these sneaky bugs.

Enter Boundary Value Analysis (BVA)—the superhero of testing techniques! It’s like poking the system right at its edges to see if it behaves properly.

Here’s How It Works:

In BVA, instead of randomly testing numbers, you focus on:

• The lowest boundary (18)
• The number just below the lowest boundary (17)
• The number just above the lowest boundary (19)
• The highest boundary (60)
• The number just below the highest boundary (59)
• The number just above the highest boundary (61)

Example Time!

Imagine the age field in your app:

1. Test inputs: 17, 18, 19, 59, 60, and 61.
2. Expected result:17 and 61 → Rejected!18, 19, 59, and 60 → Accepted!

Why It’s Fun (and Smart!):

BVA saves you time because you’re not testing every single number in the range—just the ones that really matter. Plus, it’s satisfying to outsmart bugs that think they’re safe at the edges.

So, next time you test, remember: boundaries are where the magic (and the mistakes) happen!