def test_error_on_error_if_no_cache(self):
callable = mock.Mock()
callable.side_effect = RuntimeError('Temporary error')
fn = cache()(callable)
self.assertRaises(RuntimeError, fn, 'key', 'key2')
assert len(callable.call_args_list) == 1
# Test that a 2nd call does hit the server
self.assertRaises(RuntimeError, fn, 'key', 'key2')
assert len(callable.call_args_list) == 2
def test_is_not_cached_expired(self):
expires = datetime.datetime.utcnow() - datetime.timedelta(hours=1)
callable = mock.Mock()
callable.side_effect = lambda *args: (expires, uuid.uuid4())
fn = cache()(callable)
result2 = fn('key', 'key2')
result3 = fn('key', 'key2')
assert result2 != result3
assert len(callable.call_args_list) == 2
def test_serve_stale_on_error(self):
expires = datetime.datetime.utcnow() - datetime.timedelta(hours=1)
callable = mock.Mock()
fn = cache()(callable)
callable.side_effect = lambda *args: (expires, uuid.uuid4())
result2 = fn('key', 'key2')
callable.side_effect = RuntimeError('Temporary error')
result3 = fn('key', 'key2')
assert result2 == result3
assert len(callable.call_args_list) == 2