Created
July 22, 2014 08:14
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# stolen from python2.7 unittest source | |
class _AssertRaisesContext(object): | |
"""A context manager used to implement TestCase.assertRaises* methods.""" | |
def __init__(self, expected, test_case, expected_regexp=None): | |
self.expected = expected | |
self.failureException = test_case.failureException | |
self.expected_regexp = expected_regexp | |
def __enter__(self): | |
return self | |
def __exit__(self, exc_type, exc_value, tb): | |
if exc_type is None: | |
try: | |
exc_name = self.expected.__name__ | |
except AttributeError: | |
exc_name = str(self.expected) | |
raise self.failureException( | |
"{0} not raised".format(exc_name)) | |
if not issubclass(exc_type, self.expected): | |
# let unexpected exceptions pass through | |
return False | |
self.exception = exc_value # store for later retrieval | |
if self.expected_regexp is None: | |
return True | |
expected_regexp = self.expected_regexp | |
if isinstance(expected_regexp, basestring): | |
expected_regexp = re.compile(expected_regexp) | |
if not expected_regexp.search(str(exc_value)): | |
raise self.failureException('"%s" does not match "%s"' % | |
(expected_regexp.pattern, str(exc_value))) | |
return True |
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