what does the "really tested a bunch of different elements. "mean?

Question

quotation:Wizz Air was one, we also had IT partners, telecom partners, manufacturers, as well as professional services, so across the globe, across industries, and really tested a bunch of different elements.
quesion:
1:what does the "really tested a bunch of different elements. "mean?

2:which one is the object that implements 'test'--'Wizz Air' or 'we' or other?

Answer 1

This quote appears to discuss product development activity.
Most likely the testing was done by all the partners (we), each partner doing a portion of the whole.
Tested a bunch of different elements means the program tested virtually all aspects of the product.