def test_main(obj: Any, cls: Any, expected: Exception | None) -> None:
if expected is None:
check_isinstance(obj, cls)
else:
with raises(type(expected)) as exc_info:
check_isinstance(obj, cls)
assert exc_info.value == expected
def test_fail_inner(
self,
obj: Any,
cls: Any,
keys: dict[int, SpecificTypeError],
values: dict[int, SpecificTypeError],
) -> None:
with raises(TypeErrorsInMapping) as exc_info:
check_isinstance(obj, cls)
assert exc_info.value == TypeErrorsInMapping(keys, values)
def check_dataclass(
obj: Any,
*,
globalns: dict[str, Any] | None = None,
localns: dict[str, Any] | None = None,
) -> None:
if isinstance(obj, type):
raise ArgumentIsAClass(obj)
try:
obj_fields = fields(obj)
except TypeError:
raise ArgumentIsNotADataClass(obj)
else:
errors = {}
for field in obj_fields:
name = field.name
value = getattr(obj, name)
cls = get_type_hints(obj, globalns=globalns, localns=localns)[name]
try:
check_isinstance(value, cls)
except TypeError as error:
errors[name] = error
if errors:
raise TypeErrorsInDataClass(errors)
def test_fail(self, obj: Any) -> None:
assert isinstance(obj, int)
with raises(SpecificTypeError) as exc_info:
check_isinstance(obj, int)
assert exc_info.value == SpecificTypeError(obj, int)
def test_ok(self, obj: Any) -> None:
check_isinstance(obj, bool)
def test_iterator() -> None:
check_isinstance(iter(range(3)), Iterator)
check_isinstance(iter(range(3)), Iterator[int])
def test_ok(self, obj: Any, cls: Any) -> None:
check_isinstance(obj, cls)
def test_fail_outer(self, obj: Any, cls: Any) -> None:
with raises(SpecificTypeError) as exc_info:
check_isinstance(obj, cls)
assert exc_info.value == SpecificTypeError(obj, cls)
def test_fail_inner(self, obj: Any, cls: Any,
errors: dict[int, SpecificTypeError]) -> None:
with raises(TypeErrorsInIterable) as exc_info:
check_isinstance(obj, cls)
assert exc_info.value == TypeErrorsInIterable(errors)
