How to test panics?

Question

I\'m currently pondering how to write tests that check if a given piece of code panicked? I know that Go uses recover to catch panics, but unlike say, Java code, you can\'t

Answer 1

If you use testify/assert, then it's a one-liner:

func TestOtherFunctionThatPanics(t *testing.T) {
  assert.Panics(t, OtherFunctionThatPanics, "The code did not panic")
}

Or, if your OtherFunctionThatPanics has a signature other than func():

func TestOtherFunctionThatPanics(t *testing.T) {
  assert.Panics(t, func() { OtherFunctionThatPanics(arg) }, "The code did not panic")
}

If you haven't tried testify yet, then also check out testify/mock. Super simple assertions and mocks.