def test_multi_set(self, space):
c = CellDict()
c.set(space, "a", 2)
v = c.version
c.set(space, "a", 3)
assert isinstance(c._get_cell("a", c.version), Cell)
assert c.version is not v
v = c.version
c.set(space, "a", 4)
assert isinstance(c._get_cell("a", c.version), Cell)
assert c.version is v
def test_single_set(self, space):
c = CellDict()
v = c.version
c.set(space, "a", 2)
assert c.version is not v
assert c._get_cell("a", c.version) == 2