A Covid-19 test can come in a few forms. Here's background and more information directly from the CDC regarding tests

In terms of what type of test and how the tests will be administered for your appointment, please seek out information from your testing site provider

After being tested for Covid-19, you should stay home while waiting for test results.  Follow the Wisconsin Department of Health Services Guidance.

The Health System you were tested at will provide you with instructions on staying home and how to obtain your test results.

If you test comes back positive, you will be contacted by either your local or state Health Department.