How many unit tests should I write per function/method?

Question

Do you write one test per function/method, with multiple checks in the test, or a test for each check?

Answer 1

I would suggest a test case for every check. The more you keep atomic, the better your results are!

Keeping multiple checks in a single tests will help you generate report for how much functionality needs to be corrected.

Keeping atomic test case will show you the overall quality !