def test_exc_tuple(self):
"""
Supplying 3 args means that a return value from ``sys.exc_info()`` is
being supplied.
"""
with self.assertRaises(TypeError) as ctx:
events.get_exc_info('foo', 'bar', 'baz')
self.assertTrue(unicode(ctx.exception).startswith(
u"exc_info tuple must be a valid exception instance"
))
def test_missing_args(self):
"""
Supplying no args must raise a ``TypeError``.
"""
with self.assertRaises(TypeError) as ctx:
events.get_exc_info()
self.assertEqual(
unicode(ctx.exception),
u'Expected at least one argument',
)
def test_not_an_exception(self):
"""
Supplying one arg that is not an exception instance must raise a
``TypeError``.
"""
with self.assertRaises(TypeError) as ctx:
events.get_exc_info('foobar')
self.assertEqual(
unicode(ctx.exception),
u"An exception instance must be supplied as the first argument "
"(received:'foobar')",
)
def test_return_sys_exc_info(self):
"""
Supplying an exc_info tuple must return a tuple in a ``sys.exc_info()``
style format.
"""
exc_info = (RuntimeError, RuntimeError(), None)
self.assertEqual(
events.get_exc_info(*exc_info),
exc_info
)
def test_exception(self):
"""
Supplying an exception instance must return a tuple in a
``sys.exc_info()`` style format.
"""
class TestException(Exception):
pass
exc = TestException()
ret = events.get_exc_info(exc)
self.assertTupleEqual(ret, (TestException, exc, None))
def test_exception_class(self):
"""
Supplying an exception CLASS must return a tuple in a
``sys.exc_info()`` style format.
"""
class TestException(Exception):
pass
ret = events.get_exc_info(TestException)
self.assertEquals(len(ret), 3)
exc_type, exc_value, exc_tb = ret
self.assertIs(exc_type, TestException)
self.assertIsInstance(exc_value, TestException)
self.assertIsNone(exc_tb)
def test_4_args(self):
"""
Supplying 4 args must raise a ``TypeError``.
"""
with self.assertRaises(TypeError):
events.get_exc_info('foo', 'bar', 'baz', 'gak')
