🎯 Key Takeaways

Unit tests break when AI refactors code—even when the app still works.
Behavior-driven testing verifies what the user sees, not implementation details.
Use unit tests for stable business logic; use Rihario for UI and user flows.
The code is ephemeral—test the behavior, not the functions.

A common question we see from developers using Cursor or Replit is: "How do I write unit tests for this AI-generated code?"

Rihario's Answer: Usually, you shouldn't.

The Problem with Unit Tests in Vibe Coding

Unit tests are designed to verify the implementation details of a specific function. But in Vibe Coding:

Implementation changes constantly: You might prompt the AI to refactor a class into a hook, breaking all your unit tests even if the app works perfectly.
Double maintenance: You have to ask the AI to write the code and the tests. Then you have to debug the tests.
False confidence: The helper function might pass its unit test, but the buttons on the screen might still be unclickable.

Why Rihario (Behavior Testing) Wins

Rihario focuses on Behavior Driven Testing. We don't care how the code works. We care if it works for the user.

Example Scenario: The "Calculate Total" Bug

Unit Testing Approach

You write a Jest test for calculateTotal(items). It passes. But the UI component isn't passing the items array correctly to the function.

Result: Test PASS, User FAIL.

Rihario Approach

You tell Rihario: "Add 2 items to the cart and verify the total says $50." Rihario clicks the buttons and reads the text on screen.

Result: Real-world verification.

When SHOULD you write unit tests?

Unit tests still have a place for critical, complex business logic that rarely changes (e.g., tax calculation engines, data transformation pipelines).

But for the 90% of your app that is UI, user flow, and glue code? Rihario is faster, more reliable, and zero maintenance.

Why Rihario is Better Than Unit Tests for AI Generated Code