#!/usr/bin/env python
# -*- coding: utf-8 -*-
import unittest
from contextlib import contextmanager

__all__ = [
    'CustomTestCase',
]


class CustomTestCase(unittest.TestCase):

    @contextmanager
    def assertNotRaises(self, exc_type):
        try:
            yield None
        except exc_type:
            raise self.failureException('{} raised'.format(exc_type.__name__))