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

BDD (Behavior Driven Development)

Though I'm still learning, it's basically TDD organized/focused around how your software will actually be used... NOT how it will be developed/built.

Wikipedia General Info

BTW as far as whether to do multiple asserts per test method I would recommend trying it both ways. Sometimes you'll see where one strategy left you in a bind and it'll start making sense why you normally just use one assert per method.