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# Copyright (c) 2011 testtools developers. See LICENSE for details.
from __future__ import with_statement
import sys
from testtools import (
ExpectedException,
TestCase,
)
from testtools.matchers import (
AfterPreprocessing,
Equals,
)
class TestExpectedException(TestCase):
"""Test the ExpectedException context manager."""
def test_pass_on_raise(self):
with ExpectedException(ValueError, 'tes.'):
raise ValueError('test')
def test_pass_on_raise_matcher(self):
with ExpectedException(
ValueError, AfterPreprocessing(str, Equals('test'))):
raise ValueError('test')
def test_raise_on_text_mismatch(self):
try:
with ExpectedException(ValueError, 'tes.'):
raise ValueError('mismatch')
except AssertionError:
e = sys.exc_info()[1]
self.assertEqual("'mismatch' does not match /tes./", str(e))
else:
self.fail('AssertionError not raised.')
def test_raise_on_general_mismatch(self):
matcher = AfterPreprocessing(str, Equals('test'))
value_error = ValueError('mismatch')
try:
with ExpectedException(ValueError, matcher):
raise value_error
except AssertionError:
e = sys.exc_info()[1]
self.assertEqual(matcher.match(value_error).describe(), str(e))
else:
self.fail('AssertionError not raised.')
def test_raise_on_error_mismatch(self):
try:
with ExpectedException(TypeError, 'tes.'):
raise ValueError('mismatch')
except ValueError:
e = sys.exc_info()[1]
self.assertEqual('mismatch', str(e))
else:
self.fail('ValueError not raised.')
def test_raise_if_no_exception(self):
try:
with ExpectedException(TypeError, 'tes.'):
pass
except AssertionError:
e = sys.exc_info()[1]
self.assertEqual('TypeError not raised.', str(e))
else:
self.fail('AssertionError not raised.')
def test_pass_on_raise_any_message(self):
with ExpectedException(ValueError):
raise ValueError('whatever')
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