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"""
Test what happens if Python was built without SSL
* Everything that does not involve HTTPS should still work
* HTTPS requests must fail with an error that points at the ssl module
"""
import sys
import unittest
class ImportBlocker(object):
"""
Block Imports
To be placed on ``sys.meta_path``. This ensures that the modules
specified cannot be imported, even if they are a builtin.
"""
def __init__(self, *namestoblock):
self.namestoblock = namestoblock
def find_module(self, fullname, path=None):
if fullname in self.namestoblock:
return self
return None
def load_module(self, fullname):
raise ImportError('import of {0} is blocked'.format(fullname))
class ModuleStash(object):
"""
Stashes away previously imported modules
If we reimport a module the data from coverage is lost, so we reuse the old
modules
"""
def __init__(self, namespace, modules=sys.modules):
self.namespace = namespace
self.modules = modules
self._data = {}
def stash(self):
self._data[self.namespace] = self.modules.pop(self.namespace, None)
for module in list(self.modules.keys()):
if module.startswith(self.namespace + '.'):
self._data[module] = self.modules.pop(module)
def pop(self):
self.modules.pop(self.namespace, None)
for module in list(self.modules.keys()):
if module.startswith(self.namespace + '.'):
self.modules.pop(module)
self.modules.update(self._data)
ssl_blocker = ImportBlocker('ssl', '_ssl')
module_stash = ModuleStash('urllib3')
class TestWithoutSSL(unittest.TestCase):
def setUp(self):
sys.modules.pop('ssl', None)
sys.modules.pop('_ssl', None)
module_stash.stash()
sys.meta_path.insert(0, ssl_blocker)
def tearDown(self):
sys.meta_path.remove(ssl_blocker)
module_stash.pop()
class TestImportWithoutSSL(TestWithoutSSL):
def test_cannot_import_ssl(self):
# python26 has neither contextmanagers (for assertRaises) nor
# importlib.
# 'import' inside 'lambda' is invalid syntax.
def import_ssl():
import ssl
self.assertRaises(ImportError, import_ssl)
def test_import_urllib3(self):
import urllib3
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