Can't test how they evolve, but I have analyzed the information that they used to discover that things evolve, yes.<quoted text>
So you've tested "other things" people have told you??
You've tested how organisms evolve?
You've tested light speed?
You've tested rocks & minerals?
You've tested evolution, the THEORY?
Was your testing peer reviewed & accepted?
Light speed is easy to test, there's still a mirror on the moon and even a laptop is capable of the timing calculations now.
What about "rocks and minerals?"
The theory is an explanation of the facts and how all the evidence fits into place, it's like gluing pieces of a broken glass together to find out it's a drinking glass or a mug. The pieces are already there, they already fit into a specific pattern, you just have to put them in the right place with something that actually hold them in place. That's what a scientific theory is. The theory of evolution explains how diversification happened and why most of the species are extinct, for example, but connecting the traits into a pattern that's clearly visible in the fossil record. I have not come across any evidence that does not fit this theory.