def test_raise_from_none():
try:
raise_from(IOError, None)
assert False
except IOError:
exc, exc_tb = sys.exc_info()[1:]
assert exc.__suppress_context__
assert exc.__context__ is None
assert exc.__cause__ is None
def raise_for_float_problem(suspicious, scheme):
if not isinstance(suspicious, float):
cause = ValueError("Should be a float")
error = ItIsBullshitError(suspicious)
pep3134.raise_from(error, cause)
if abs(suspicious - scheme) >= sys.float_info.epsilon:
cause = ValueError("Should be {0}".format(scheme))
error = ItIsBullshitError(suspicious)
pep3134.raise_from(error, cause)
def test_string_itisbullshiterror(self):
error_to_check = ValueError("KeyError")
for line in ("3 line", "2 line", "4 line"):
try:
current_error = ItIsBullshitError(line)
pep3134.raise_from(current_error, error_to_check)
except ItIsBullshitError as err:
error_to_check = err
assert list(error_to_check) == ['4 line', '2 line', '3 line',
'KeyError']
def raise_for_string_problem(suspicious, scheme):
if not isinstance(suspicious, string_types):
cause = ValueError("Should be a string")
error = ItIsBullshitError(suspicious)
pep3134.raise_from(error, cause)
# noinspection PyTypeChecker
if re.match(scheme, suspicious, re.UNICODE) is None:
cause = ValueError("Regex mismatch: {0}".format(scheme))
error = ItIsBullshitError(suspicious)
pep3134.raise_from(error, cause)
def test_string_itisbullshiterror(self):
error_to_check = ValueError("KeyError")
for line in ("3 line", "2 line", "4 line"):
try:
current_error = ItIsBullshitError(line)
pep3134.raise_from(current_error, error_to_check)
except ItIsBullshitError as err:
error_to_check = err
assert list(error_to_check) == [
'4 line', '2 line', '3 line', 'KeyError'
]
def test_reraise():
try:
raise_from(IOError, KeyError)
assert False
except IOError:
try:
reraise()
except IOError:
reraised, reraised_tb = sys.exc_info()[1:]
assert not reraised.__suppress_context__
assert reraised.__cause__ is None
def raise_for_tuple_problem(suspicious, scheme):
if not scheme:
raise TypeError("Tuple scheme should contain at least 1 element")
error = None
for type_validator in scheme:
try:
raise_for_problem(suspicious, type_validator)
break
except ItIsBullshitError as err:
error = err
else:
if error is not None:
final_error = ItIsBullshitError(suspicious)
pep3134.raise_from(final_error, error)
def test_raise_from_proxy_exc():
try:
raise_(TypeError, "OK")
assert False
except TypeError:
cause, cause_tb = sys.exc_info()[1:]
try:
raise_from(IOError, cause)
except IOError:
exc, exc_tb = sys.exc_info()[1:]
assert exc.__suppress_context__
assert exc.__context__ is None
assert exc.__cause__ is cause
assert exc.__traceback__ is exc_tb
assert exc.__cause__.__traceback__ is cause_tb
def raise_for_list_problem(suspicious, scheme):
if not scheme:
raise TypeError("List scheme should contain at least 1 element")
if len(scheme) != 1:
raise TypeError("List scheme should contain only 1 element")
if not isinstance(suspicious, (tuple, list)):
cause = ValueError("Type mismatch, should be a list or a tuple")
error = ItIsBullshitError(suspicious)
pep3134.raise_from(error, cause)
for item in suspicious:
try:
raise_for_problem(item, scheme[0])
except ItIsBullshitError as err:
error = ItIsBullshitError(suspicious)
pep3134.raise_from(error, err)
def test_raise_from_ordinary_exc():
try:
raise TypeError("OK")
except TypeError:
cause, cause_tb = sys.exc_info()[1:]
try:
raise_from(IOError, cause)
assert False
except IOError:
exc, exc_tb = sys.exc_info()[1:]
if sys.version_info[0] == 2:
assert exc.__cause__ is not cause
assert hasattr(exc.__cause__, "__pep3134__")
else:
assert exc.__cause__ is cause
assert exc.__suppress_context__
assert exc.__context__ is None
assert exc.__traceback__ is exc_tb
assert exc.__cause__.__traceback__ is cause_tb
def raise_for_dict_problem(suspicious, scheme):
if not scheme:
raise TypeError("Dict scheme should contain at least 1 element")
if not isinstance(suspicious, dict):
cause = ValueError("Type mismatch, should be a dict")
error = ItIsBullshitError(suspicious)
pep3134.raise_from(error, cause)
for key, validator in iteritems(scheme):
original_validator = validator
if isinstance(validator, OrSkipped):
original_validator = validator.validator
if key not in suspicious:
if not isinstance(validator, OrSkipped):
cause = ValueError("Missed key {0}".format(key))
error = ItIsBullshitError(suspicious)
pep3134.raise_from(error, cause)
else:
if suspicious[key] is not validator:
try:
raise_for_problem(suspicious[key], original_validator)
except ItIsBullshitError as err:
error = ItIsBullshitError(suspicious)
pep3134.raise_from(error, err)
def raise_for_problem(suspicious, scheme):
if isinstance(scheme, OrSkipped):
raise TypeError("Scheme could not be OrSkipped here")
if shallow_check(suspicious, scheme):
return
if isinstance(scheme, dict):
raise_for_dict_problem(suspicious, scheme)
elif isinstance(scheme, list):
raise_for_list_problem(suspicious, scheme)
elif isinstance(scheme, tuple):
raise_for_tuple_problem(suspicious, scheme)
elif isinstance(scheme, string_types):
raise_for_string_problem(suspicious, scheme)
elif isinstance(scheme, float):
raise_for_float_problem(suspicious, scheme)
elif isinstance(scheme, FUNC_TYPE):
raise_for_callable_problem(suspicious, scheme)
else:
cause = ValueError("Scheme mismatch {0}".format(scheme))
error = ItIsBullshitError(suspicious)
pep3134.raise_from(error, cause)
def test_raise_from_fail(input_, cause_):
with pytest.raises(TypeError):
raise_from(input_, cause_)
def test_raise_from(input_, cause_):
with pytest.raises(IOError):
raise_from(input_, cause_)
def raise_for_callable_problem(suspicious, validator):
try:
validator(suspicious)
except Exception as err: # pylint: disable=W0703
error = ItIsBullshitError(suspicious)
pep3134.raise_from(error, err)
