Counter Click TS

Simple counter using React TypeScript with Unit Testing using Jest and Enzyme

Challenges

One of the testing of this simple app was to apply the following scenario:

1. Decrement button

Create a new button that subtracts 1 from the counter

2. No count below 0

Don't let the counter go below zero.
if the counter is at 0 and the decrement button is clicked:
- don't decrement the counter
- display an error message saying the counter can't go below zero

3. Remove error when increment button is clicked

If error is showing and increment button is clicked, clear the error.