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# Copyright (c) 2008-2012 testtools developers. See LICENSE for details.
"""Tests for matchers."""
from testtools import (
Matcher, # check that Matcher is exposed at the top level for docs.
TestCase,
)
from testtools.compat import (
str_is_unicode,
text_repr,
_u,
)
from testtools.matchers import (
Equals,
MatchesException,
Raises,
)
from testtools.matchers._impl import (
Mismatch,
MismatchDecorator,
MismatchError,
)
from testtools.tests.helpers import FullStackRunTest
# Silence pyflakes.
Matcher
class TestMismatch(TestCase):
run_tests_with = FullStackRunTest
def test_constructor_arguments(self):
mismatch = Mismatch("some description", {'detail': "things"})
self.assertEqual("some description", mismatch.describe())
self.assertEqual({'detail': "things"}, mismatch.get_details())
def test_constructor_no_arguments(self):
mismatch = Mismatch()
self.assertThat(mismatch.describe,
Raises(MatchesException(NotImplementedError)))
self.assertEqual({}, mismatch.get_details())
class TestMismatchError(TestCase):
def test_is_assertion_error(self):
# MismatchError is an AssertionError, so that most of the time, it
# looks like a test failure, rather than an error.
def raise_mismatch_error():
raise MismatchError(2, Equals(3), Equals(3).match(2))
self.assertRaises(AssertionError, raise_mismatch_error)
def test_default_description_is_mismatch(self):
mismatch = Equals(3).match(2)
e = MismatchError(2, Equals(3), mismatch)
self.assertEqual(mismatch.describe(), str(e))
def test_default_description_unicode(self):
matchee = _u('\xa7')
matcher = Equals(_u('a'))
mismatch = matcher.match(matchee)
e = MismatchError(matchee, matcher, mismatch)
self.assertEqual(mismatch.describe(), str(e))
def test_verbose_description(self):
matchee = 2
matcher = Equals(3)
mismatch = matcher.match(2)
e = MismatchError(matchee, matcher, mismatch, True)
expected = (
'Match failed. Matchee: %r\n'
'Matcher: %s\n'
'Difference: %s\n' % (
matchee,
matcher,
matcher.match(matchee).describe(),
))
self.assertEqual(expected, str(e))
def test_verbose_unicode(self):
# When assertThat is given matchees or matchers that contain non-ASCII
# unicode strings, we can still provide a meaningful error.
matchee = _u('\xa7')
matcher = Equals(_u('a'))
mismatch = matcher.match(matchee)
expected = (
'Match failed. Matchee: %s\n'
'Matcher: %s\n'
'Difference: %s\n' % (
text_repr(matchee),
matcher,
mismatch.describe(),
))
e = MismatchError(matchee, matcher, mismatch, True)
if str_is_unicode:
actual = str(e)
else:
actual = unicode(e)
# Using str() should still work, and return ascii only
self.assertEqual(
expected.replace(matchee, matchee.encode("unicode-escape")),
str(e).decode("ascii"))
self.assertEqual(expected, actual)
class TestMismatchDecorator(TestCase):
run_tests_with = FullStackRunTest
def test_forwards_description(self):
x = Mismatch("description", {'foo': 'bar'})
decorated = MismatchDecorator(x)
self.assertEqual(x.describe(), decorated.describe())
def test_forwards_details(self):
x = Mismatch("description", {'foo': 'bar'})
decorated = MismatchDecorator(x)
self.assertEqual(x.get_details(), decorated.get_details())
def test_repr(self):
x = Mismatch("description", {'foo': 'bar'})
decorated = MismatchDecorator(x)
self.assertEqual(
'<testtools.matchers.MismatchDecorator(%r)>' % (x,),
repr(decorated))
def test_suite():
from unittest import TestLoader
return TestLoader().loadTestsFromName(__name__)
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