def test_call(self):
lazy = _LazyError(
ValueError("lazy failure")) # creating doesn't cause error
with self.assertRaisesMessage(ValueError, "lazy failure"):
self.unused = lazy() # call *does* cause error
def test_attr(self):
lazy = _LazyError(
ValueError("lazy failure")) # creating doesn't cause error
lazy.some_prop = "foo" # setattr doesn't cause error
with self.assertRaisesMessage(ValueError, "lazy failure"):
self.unused = lazy.anything # getattr *does* cause error