That may or may not be valid depending on what one considers "done" in the context of a project. My team considers a feature done when it goes through QC and b

That may or may not be valid depending on what one considers "done" in the context of a project. My team considers a feature done when it goes through QC and business analysis. I personally find it nice to just hit a couple of hotkeys instead of working through the application itself in order to test functionality. It does save me time because I want to ensure that the feature works and I have to devote less cycles to fix some small thing I missed when running the real app as opposed to tests.