Verify plumbing is vented properly after remodel

[JimmyE]

Hired contractor to do whole house remodel. Washing machine & bathrooms were relocated.
Because of several other plumbing errors I'm pretty sure things are not vented properly.
My question is how can I actually verify the actual venting? Smoke test? Other?

 

[Terry]

Did you take pictures?

 

[Sponsor]

 

[JimmyE]

nope.