def test_credits_invalid_type(self):
""" Test that invalid type raises exception """
with self.assertRaises(Exception):
CourseVal.credits("0.5")
with self.assertRaises(Exception):
CourseVal.credits(-0.5)
def test_credits(self):
""" Test that valid args does not raise exception """
try:
CourseVal.credits(0.5)
except Exception:
self.fail()