def test_itemrollback_nop_error() -> None:
d = {"foo": 42}
with pytest.raises(RuntimeError, match="Catch this!"):
with itemrollback(d, "foo"):
assert d["foo"] == 42
raise RuntimeError("Catch this!")
assert d["foo"] == 42
def test_itemrollback_unset_error() -> None:
d = {"foo": 42}
with pytest.raises(RuntimeError, match="Catch this!"):
with itemrollback(d, "bar"):
assert "bar" not in d
raise RuntimeError("Catch this!")
assert "bar" not in d
def test_itemrollback_unset_modify_error() -> None:
d: Dict[str, Any] = {"foo": 42}
with pytest.raises(RuntimeError, match="Catch this!"):
with itemrollback(d, "bar"):
assert "bar" not in d
d["bar"] = [3.14]
raise RuntimeError("Catch this!")
assert "bar" not in d
def test_itemrollback_modify_error() -> None:
d: Dict[str, Any] = {"foo": 42}
with pytest.raises(RuntimeError, match="Catch this!"):
with itemrollback(d, "foo"):
assert d["foo"] == 42
d["foo"] = [3.14]
raise RuntimeError("Catch this!")
assert d["foo"] == 42
def test_itemrollback_no_copy() -> None:
d: Dict[str, Dict[str, List[Any]]] = {
"foo": {
"bar": [1, 2, 3],
"quux": ["a", "b", "c"]
}
}
with itemrollback(d, "foo"):
d["foo"]["bar"].append(4)
d["foo"]["quux"] = ["x", "y", "z"]
assert d["foo"] == {"bar": [1, 2, 3, 4], "quux": ["x", "y", "z"]}
def test_itemrollback_deepcopy(copy: bool) -> None:
d: Dict[str, Dict[str, List[Any]]] = {
"foo": {
"bar": [1, 2, 3],
"quux": ["a", "b", "c"]
}
}
with itemrollback(d, "foo", copy=copy, deepcopy=True):
d["foo"]["bar"].append(4)
d["foo"]["quux"] = ["x", "y", "z"]
assert d["foo"] == {"bar": [1, 2, 3], "quux": ["a", "b", "c"]}
def test_itemrollback_deepcopy_error(copy: bool) -> None:
d: Dict[str, Dict[str, List[Any]]] = {
"foo": {
"bar": [1, 2, 3],
"quux": ["a", "b", "c"]
}
}
with pytest.raises(RuntimeError, match="Catch this!"):
with itemrollback(d, "foo", copy=copy, deepcopy=True):
d["foo"]["bar"].append(4)
d["foo"]["quux"] = ["x", "y", "z"]
raise RuntimeError("Catch this!")
assert d["foo"] == {"bar": [1, 2, 3], "quux": ["a", "b", "c"]}
def test_itemrollback_unset_modify() -> None:
d: Dict[str, Any] = {"foo": 42}
with itemrollback(d, "bar"):
assert "bar" not in d
d["bar"] = [3.14]
assert "bar" not in d
def test_itemrollback_unset() -> None:
d = {"foo": 42}
with itemrollback(d, "bar"):
assert "bar" not in d
assert "bar" not in d
def test_itemrollback_nop() -> None:
d = {"foo": 42}
with itemrollback(d, "foo"):
assert d["foo"] == 42
assert d["foo"] == 42
def test_itemrollback_del() -> None:
d = {"foo": 42}
with itemrollback(d, "foo"):
assert d["foo"] == 42
del d["foo"]
assert d["foo"] == 42
def test_itemrollback_modify() -> None:
d: Dict[str, Any] = {"foo": 42}
with itemrollback(d, "foo"):
assert d["foo"] == 42
d["foo"] = [3.14]
assert d["foo"] == 42