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Mini Shell
Mini Shell
from __future__ import absolute_import
import os
import shutil
import tempfile
import unittest
class SetupStack(object):
def __init__(self):
self._on_teardown = []
def add_teardown(self, teardown):
self._on_teardown.append(teardown)
def tear_down(self):
for func in reversed(self._on_teardown):
func()
class TearDownConvenience(object):
def __init__(self, setup_stack=None):
self._own_setup_stack = setup_stack is None
if setup_stack is None:
setup_stack = SetupStack()
self._setup_stack = setup_stack
# only call this convenience method if no setup_stack was supplied to c'tor
def tear_down(self):
assert self._own_setup_stack
self._setup_stack.tear_down()
class TempDirMaker(TearDownConvenience):
def make_temp_dir(self, dir_=None):
temp_dir = tempfile.mkdtemp(
prefix="tmp-%s-" % self.__class__.__name__, dir=dir_)
def tear_down():
shutil.rmtree(temp_dir)
self._setup_stack.add_teardown(tear_down)
return temp_dir
class MonkeyPatcher(TearDownConvenience):
Unset = object()
def monkey_patch(self, obj, name, value):
orig_value = getattr(obj, name)
setattr(obj, name, value)
def reverse_patch():
setattr(obj, name, orig_value)
self._setup_stack.add_teardown(reverse_patch)
def _set_environ(self, env, name, value):
if value is self.Unset:
try:
del env[name]
except KeyError:
pass
else:
env[name] = value
def monkey_patch_environ(self, name, value, env=os.environ):
orig_value = env.get(name, self.Unset)
self._set_environ(env, name, value)
def reverse_patch():
self._set_environ(env, name, orig_value)
self._setup_stack.add_teardown(reverse_patch)
class FixtureFactory(object):
def __init__(self):
self._setup_stack = SetupStack()
self._context_managers = {}
self._fixtures = {}
def register_context_manager(self, name, context_manager):
self._context_managers[name] = context_manager
def get_fixture(self, name, add_teardown):
context_manager = self._context_managers[name]
fixture = context_manager.__enter__()
add_teardown(lambda: context_manager.__exit__(None, None, None))
return fixture
def get_cached_fixture(self, name):
fixture = self._fixtures.get(name)
if fixture is None:
fixture = self.get_fixture(name, self._setup_stack.add_teardown)
self._fixtures[name] = fixture
return fixture
def tear_down(self):
self._setup_stack.tear_down()
class TestCase(unittest.TestCase):
def setUp(self):
self._setup_stack = SetupStack()
self._monkey_patcher = MonkeyPatcher(self._setup_stack)
def tearDown(self):
self._setup_stack.tear_down()
def register_context_manager(self, name, context_manager):
return self.fixture_factory.register_context_manager(name,
context_manager)
def get_fixture(self, name):
return self.fixture_factory.get_fixture(name, self.add_teardown)
def get_cached_fixture(self, name):
return self.fixture_factory.get_cached_fixture(name)
def add_teardown(self, *args, **kwds):
self._setup_stack.add_teardown(*args, **kwds)
def make_temp_dir(self, *args, **kwds):
return TempDirMaker(self._setup_stack).make_temp_dir(*args, **kwds)
def monkey_patch(self, *args, **kwds):
return self._monkey_patcher.monkey_patch(*args, **kwds)
def monkey_patch_environ(self, *args, **kwds):
return self._monkey_patcher.monkey_patch_environ(*args, **kwds)
def assert_contains(self, container, containee):
self.assertTrue(containee in container,
"%r not in %r" % (containee, container))
def assert_less_than(self, got, expected):
self.assertTrue(got < expected, "%r >= %r" % (got, expected))
Zerion Mini Shell 1.0