mirror of
https://github.com/moparisthebest/SickRage
synced 2024-11-06 09:25:03 -05:00
289 lines
11 KiB
Python
289 lines
11 KiB
Python
#!/usr/bin/env python
|
|
from __future__ import absolute_import, division, print_function, with_statement
|
|
|
|
from tornado import gen
|
|
from tornado.log import app_log
|
|
from tornado.stack_context import (StackContext, wrap, NullContext, StackContextInconsistentError,
|
|
ExceptionStackContext, run_with_stack_context, _state)
|
|
from tornado.testing import AsyncHTTPTestCase, AsyncTestCase, ExpectLog, gen_test
|
|
from tornado.test.util import unittest
|
|
from tornado.web import asynchronous, Application, RequestHandler
|
|
import contextlib
|
|
import functools
|
|
import logging
|
|
|
|
|
|
class TestRequestHandler(RequestHandler):
|
|
def __init__(self, app, request, io_loop):
|
|
super(TestRequestHandler, self).__init__(app, request)
|
|
self.io_loop = io_loop
|
|
|
|
@asynchronous
|
|
def get(self):
|
|
logging.debug('in get()')
|
|
# call self.part2 without a self.async_callback wrapper. Its
|
|
# exception should still get thrown
|
|
self.io_loop.add_callback(self.part2)
|
|
|
|
def part2(self):
|
|
logging.debug('in part2()')
|
|
# Go through a third layer to make sure that contexts once restored
|
|
# are again passed on to future callbacks
|
|
self.io_loop.add_callback(self.part3)
|
|
|
|
def part3(self):
|
|
logging.debug('in part3()')
|
|
raise Exception('test exception')
|
|
|
|
def write_error(self, status_code, **kwargs):
|
|
if 'exc_info' in kwargs and str(kwargs['exc_info'][1]) == 'test exception':
|
|
self.write('got expected exception')
|
|
else:
|
|
self.write('unexpected failure')
|
|
|
|
|
|
class HTTPStackContextTest(AsyncHTTPTestCase):
|
|
def get_app(self):
|
|
return Application([('/', TestRequestHandler,
|
|
dict(io_loop=self.io_loop))])
|
|
|
|
def test_stack_context(self):
|
|
with ExpectLog(app_log, "Uncaught exception GET /"):
|
|
self.http_client.fetch(self.get_url('/'), self.handle_response)
|
|
self.wait()
|
|
self.assertEqual(self.response.code, 500)
|
|
self.assertTrue(b'got expected exception' in self.response.body)
|
|
|
|
def handle_response(self, response):
|
|
self.response = response
|
|
self.stop()
|
|
|
|
|
|
class StackContextTest(AsyncTestCase):
|
|
def setUp(self):
|
|
super(StackContextTest, self).setUp()
|
|
self.active_contexts = []
|
|
|
|
@contextlib.contextmanager
|
|
def context(self, name):
|
|
self.active_contexts.append(name)
|
|
yield
|
|
self.assertEqual(self.active_contexts.pop(), name)
|
|
|
|
# Simulates the effect of an asynchronous library that uses its own
|
|
# StackContext internally and then returns control to the application.
|
|
def test_exit_library_context(self):
|
|
def library_function(callback):
|
|
# capture the caller's context before introducing our own
|
|
callback = wrap(callback)
|
|
with StackContext(functools.partial(self.context, 'library')):
|
|
self.io_loop.add_callback(
|
|
functools.partial(library_inner_callback, callback))
|
|
|
|
def library_inner_callback(callback):
|
|
self.assertEqual(self.active_contexts[-2:],
|
|
['application', 'library'])
|
|
callback()
|
|
|
|
def final_callback():
|
|
# implementation detail: the full context stack at this point
|
|
# is ['application', 'library', 'application']. The 'library'
|
|
# context was not removed, but is no longer innermost so
|
|
# the application context takes precedence.
|
|
self.assertEqual(self.active_contexts[-1], 'application')
|
|
self.stop()
|
|
with StackContext(functools.partial(self.context, 'application')):
|
|
library_function(final_callback)
|
|
self.wait()
|
|
|
|
def test_deactivate(self):
|
|
deactivate_callbacks = []
|
|
|
|
def f1():
|
|
with StackContext(functools.partial(self.context, 'c1')) as c1:
|
|
deactivate_callbacks.append(c1)
|
|
self.io_loop.add_callback(f2)
|
|
|
|
def f2():
|
|
with StackContext(functools.partial(self.context, 'c2')) as c2:
|
|
deactivate_callbacks.append(c2)
|
|
self.io_loop.add_callback(f3)
|
|
|
|
def f3():
|
|
with StackContext(functools.partial(self.context, 'c3')) as c3:
|
|
deactivate_callbacks.append(c3)
|
|
self.io_loop.add_callback(f4)
|
|
|
|
def f4():
|
|
self.assertEqual(self.active_contexts, ['c1', 'c2', 'c3'])
|
|
deactivate_callbacks[1]()
|
|
# deactivating a context doesn't remove it immediately,
|
|
# but it will be missing from the next iteration
|
|
self.assertEqual(self.active_contexts, ['c1', 'c2', 'c3'])
|
|
self.io_loop.add_callback(f5)
|
|
|
|
def f5():
|
|
self.assertEqual(self.active_contexts, ['c1', 'c3'])
|
|
self.stop()
|
|
self.io_loop.add_callback(f1)
|
|
self.wait()
|
|
|
|
def test_deactivate_order(self):
|
|
# Stack context deactivation has separate logic for deactivation at
|
|
# the head and tail of the stack, so make sure it works in any order.
|
|
def check_contexts():
|
|
# Make sure that the full-context array and the exception-context
|
|
# linked lists are consistent with each other.
|
|
full_contexts, chain = _state.contexts
|
|
exception_contexts = []
|
|
while chain is not None:
|
|
exception_contexts.append(chain)
|
|
chain = chain.old_contexts[1]
|
|
self.assertEqual(list(reversed(full_contexts)), exception_contexts)
|
|
return list(self.active_contexts)
|
|
|
|
def make_wrapped_function():
|
|
"""Wraps a function in three stack contexts, and returns
|
|
the function along with the deactivation functions.
|
|
"""
|
|
# Remove the test's stack context to make sure we can cover
|
|
# the case where the last context is deactivated.
|
|
with NullContext():
|
|
partial = functools.partial
|
|
with StackContext(partial(self.context, 'c0')) as c0:
|
|
with StackContext(partial(self.context, 'c1')) as c1:
|
|
with StackContext(partial(self.context, 'c2')) as c2:
|
|
return (wrap(check_contexts), [c0, c1, c2])
|
|
|
|
# First make sure the test mechanism works without any deactivations
|
|
func, deactivate_callbacks = make_wrapped_function()
|
|
self.assertEqual(func(), ['c0', 'c1', 'c2'])
|
|
|
|
# Deactivate the tail
|
|
func, deactivate_callbacks = make_wrapped_function()
|
|
deactivate_callbacks[0]()
|
|
self.assertEqual(func(), ['c1', 'c2'])
|
|
|
|
# Deactivate the middle
|
|
func, deactivate_callbacks = make_wrapped_function()
|
|
deactivate_callbacks[1]()
|
|
self.assertEqual(func(), ['c0', 'c2'])
|
|
|
|
# Deactivate the head
|
|
func, deactivate_callbacks = make_wrapped_function()
|
|
deactivate_callbacks[2]()
|
|
self.assertEqual(func(), ['c0', 'c1'])
|
|
|
|
def test_isolation_nonempty(self):
|
|
# f2 and f3 are a chain of operations started in context c1.
|
|
# f2 is incidentally run under context c2, but that context should
|
|
# not be passed along to f3.
|
|
def f1():
|
|
with StackContext(functools.partial(self.context, 'c1')):
|
|
wrapped = wrap(f2)
|
|
with StackContext(functools.partial(self.context, 'c2')):
|
|
wrapped()
|
|
|
|
def f2():
|
|
self.assertIn('c1', self.active_contexts)
|
|
self.io_loop.add_callback(f3)
|
|
|
|
def f3():
|
|
self.assertIn('c1', self.active_contexts)
|
|
self.assertNotIn('c2', self.active_contexts)
|
|
self.stop()
|
|
|
|
self.io_loop.add_callback(f1)
|
|
self.wait()
|
|
|
|
def test_isolation_empty(self):
|
|
# Similar to test_isolation_nonempty, but here the f2/f3 chain
|
|
# is started without any context. Behavior should be equivalent
|
|
# to the nonempty case (although historically it was not)
|
|
def f1():
|
|
with NullContext():
|
|
wrapped = wrap(f2)
|
|
with StackContext(functools.partial(self.context, 'c2')):
|
|
wrapped()
|
|
|
|
def f2():
|
|
self.io_loop.add_callback(f3)
|
|
|
|
def f3():
|
|
self.assertNotIn('c2', self.active_contexts)
|
|
self.stop()
|
|
|
|
self.io_loop.add_callback(f1)
|
|
self.wait()
|
|
|
|
def test_yield_in_with(self):
|
|
@gen.engine
|
|
def f():
|
|
self.callback = yield gen.Callback('a')
|
|
with StackContext(functools.partial(self.context, 'c1')):
|
|
# This yield is a problem: the generator will be suspended
|
|
# and the StackContext's __exit__ is not called yet, so
|
|
# the context will be left on _state.contexts for anything
|
|
# that runs before the yield resolves.
|
|
yield gen.Wait('a')
|
|
|
|
with self.assertRaises(StackContextInconsistentError):
|
|
f()
|
|
self.wait()
|
|
# Cleanup: to avoid GC warnings (which for some reason only seem
|
|
# to show up on py33-asyncio), invoke the callback (which will do
|
|
# nothing since the gen.Runner is already finished) and delete it.
|
|
self.callback()
|
|
del self.callback
|
|
|
|
@gen_test
|
|
def test_yield_outside_with(self):
|
|
# This pattern avoids the problem in the previous test.
|
|
cb = yield gen.Callback('k1')
|
|
with StackContext(functools.partial(self.context, 'c1')):
|
|
self.io_loop.add_callback(cb)
|
|
yield gen.Wait('k1')
|
|
|
|
def test_yield_in_with_exception_stack_context(self):
|
|
# As above, but with ExceptionStackContext instead of StackContext.
|
|
@gen.engine
|
|
def f():
|
|
with ExceptionStackContext(lambda t, v, tb: False):
|
|
yield gen.Task(self.io_loop.add_callback)
|
|
|
|
with self.assertRaises(StackContextInconsistentError):
|
|
f()
|
|
self.wait()
|
|
|
|
@gen_test
|
|
def test_yield_outside_with_exception_stack_context(self):
|
|
cb = yield gen.Callback('k1')
|
|
with ExceptionStackContext(lambda t, v, tb: False):
|
|
self.io_loop.add_callback(cb)
|
|
yield gen.Wait('k1')
|
|
|
|
@gen_test
|
|
def test_run_with_stack_context(self):
|
|
@gen.coroutine
|
|
def f1():
|
|
self.assertEqual(self.active_contexts, ['c1'])
|
|
yield run_with_stack_context(
|
|
StackContext(functools.partial(self.context, 'c2')),
|
|
f2)
|
|
self.assertEqual(self.active_contexts, ['c1'])
|
|
|
|
@gen.coroutine
|
|
def f2():
|
|
self.assertEqual(self.active_contexts, ['c1', 'c2'])
|
|
yield gen.Task(self.io_loop.add_callback)
|
|
self.assertEqual(self.active_contexts, ['c1', 'c2'])
|
|
|
|
self.assertEqual(self.active_contexts, [])
|
|
yield run_with_stack_context(
|
|
StackContext(functools.partial(self.context, 'c1')),
|
|
f1)
|
|
self.assertEqual(self.active_contexts, [])
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|