def test_set_available_without_being_unavailable_must_raise(self):
m = {"n": 0}
s = Storage(0, "0", True, m)
with pytest.raises(SystemError) as excinfo:
s._set_available()
assert "unavailable" in str(excinfo.value)
def test_set_available(self):
s = Storage(0, "0")
s._set_unavailable()
s._set_available()
assert not s.is_unavailable