154 lines
4.5 KiB
Python
154 lines
4.5 KiB
Python
"""
|
|
General testing utilities.
|
|
"""
|
|
import functools
|
|
import sys
|
|
from contextlib import contextmanager
|
|
|
|
import moto
|
|
from django.dispatch import Signal
|
|
from markupsafe import escape
|
|
from mock import Mock, patch
|
|
|
|
|
|
@contextmanager
|
|
def nostderr():
|
|
"""
|
|
ContextManager to suppress stderr messages
|
|
http://stackoverflow.com/a/1810086/882918
|
|
"""
|
|
savestderr = sys.stderr
|
|
|
|
class Devnull(object):
|
|
""" /dev/null incarnation as output-stream-like object """
|
|
def write(self, _):
|
|
""" Write method - just does nothing"""
|
|
pass
|
|
|
|
sys.stderr = Devnull()
|
|
try:
|
|
yield
|
|
finally:
|
|
sys.stderr = savestderr
|
|
|
|
|
|
class XssTestMixin(object):
|
|
"""
|
|
Mixin for testing XSS vulnerabilities.
|
|
"""
|
|
|
|
def assert_no_xss(self, response, xss_content):
|
|
"""Assert that `xss_content` is not present in the content of
|
|
`response`, and that its escaped version is present. Uses the
|
|
same `markupsafe.escape` function as Mako templates.
|
|
|
|
Args:
|
|
response (Response): The HTTP response
|
|
xss_content (str): The Javascript code to check for.
|
|
|
|
Returns:
|
|
None
|
|
|
|
"""
|
|
self.assertContains(response, escape(xss_content))
|
|
self.assertNotContains(response, xss_content)
|
|
|
|
|
|
def disable_signal(module, signal):
|
|
"""Replace `signal` inside of `module` with a dummy signal. Can be
|
|
used as a method or class decorator, as well as a context manager."""
|
|
return patch.object(module, signal, new=Signal())
|
|
|
|
|
|
class MockSignalHandlerMixin(object):
|
|
"""Mixin for testing sending of signals."""
|
|
|
|
@contextmanager
|
|
def assert_signal_sent(self, module, signal, *args, **kwargs):
|
|
"""Assert that a signal was sent with the correct arguments. Since
|
|
Django calls signal handlers with the signal as an argument,
|
|
it is added to `kwargs`.
|
|
|
|
Uses `mock.patch.object`, which requires the target to be
|
|
specified as a module along with a variable name inside that
|
|
module.
|
|
|
|
Args:
|
|
module (module): The module in which to patch the given signal name.
|
|
signal (str): The name of the signal to patch.
|
|
*args, **kwargs: The arguments which should have been passed
|
|
along with the signal. If `exclude_args` is passed as a
|
|
keyword argument, its value should be a list of keyword
|
|
arguments passed to the signal whose values should be
|
|
ignored.
|
|
|
|
"""
|
|
with patch.object(module, signal, new=Signal()) as mock_signal:
|
|
def handler(*args, **kwargs): # pylint: disable=unused-argument
|
|
"""No-op signal handler."""
|
|
pass
|
|
mock_handler = Mock(spec=handler)
|
|
mock_signal.connect(mock_handler)
|
|
yield
|
|
self.assertTrue(mock_handler.called)
|
|
mock_args, mock_kwargs = mock_handler.call_args
|
|
if 'exclude_args' in kwargs:
|
|
for key in kwargs['exclude_args']:
|
|
self.assertIn(key, mock_kwargs)
|
|
del mock_kwargs[key]
|
|
del kwargs['exclude_args']
|
|
self.assertEqual(mock_args, args)
|
|
self.assertEqual(mock_kwargs, dict(kwargs, signal=mock_signal))
|
|
|
|
|
|
@contextmanager
|
|
def skip_signal(signal, **kwargs):
|
|
"""
|
|
ContextManager to skip a signal by disconnecting it, yielding,
|
|
and then reconnecting the signal.
|
|
"""
|
|
signal.disconnect(**kwargs)
|
|
yield
|
|
signal.connect(**kwargs)
|
|
|
|
|
|
class MockS3Mixin(object):
|
|
"""
|
|
TestCase mixin that stubs S3 using the moto library. Note that this will
|
|
activate httpretty, which will monkey patch socket.
|
|
"""
|
|
def setUp(self):
|
|
super(MockS3Mixin, self).setUp()
|
|
self._mock_s3 = moto.mock_s3()
|
|
self._mock_s3.start()
|
|
|
|
def tearDown(self):
|
|
self._mock_s3.stop()
|
|
super(MockS3Mixin, self).tearDown()
|
|
|
|
|
|
class reprwrapper(object):
|
|
"""
|
|
Wrapper class for functions that need a normalized string representation.
|
|
"""
|
|
def __init__(self, func):
|
|
self._func = func
|
|
self.repr = 'Func: {}'.format(func.__name__)
|
|
functools.update_wrapper(self, func)
|
|
|
|
def __call__(self, *args, **kw):
|
|
return self._func(*args, **kw)
|
|
|
|
def __repr__(self):
|
|
return self.repr
|
|
|
|
|
|
def normalize_repr(func):
|
|
"""
|
|
Function decorator used to normalize its string representation.
|
|
Used to wrap functions used as ddt parameters, so pytest-xdist
|
|
doesn't complain about the sequence of discovered tests differing
|
|
between worker processes.
|
|
"""
|
|
return reprwrapper(func)
|