def test_do_stuff4(self):
test_param = ''
result = totest.do_stuff(test_param)
self.assertEqual(result, 'please enter number')
def test_do_stuff(self):
test_param = 10
result = totest.do_stuff(test_param)
self.assertEqual(result, 15)
def test_do_stuff2(self):
test_param = 'asdfasdfasd'
result = totest.do_stuff(test_param)
self.assertIsInstance(result, ValueError)