Quality Assurance Projects - Metric-Imperial Converter

Tell us what’s happening:
Describe your issue in detail here.
Could someone tell why i am not able to pass the following tests:

-invalid number
-invalid number and unit

I’ve tried doing the same test in both my solution and the app provided by FCC and I see they return the same messages. I just dont know what scenarios I’m missing. What inputs should I use to see that my app is not what the challenge requires?

Your project link(s)

solution: Glitch :・゚✧

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36

Challenge: Quality Assurance Projects - Metric-Imperial Converter

Link to the challenge: