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"""Utilities shared by tests."""
import collections
import contextlib
import io
import unittest.mock
import os
import sys
import threading
import unittest
import unittest.mock
from wsgiref.simple_server import make_server, WSGIRequestHandler, WSGIServer
try:
import ssl
except ImportError: # pragma: no cover
ssl = None
from . import tasks
from . import base_events
from . import events
from . import selectors
if sys.platform == 'win32': # pragma: no cover
from .windows_utils import socketpair
else:
from socket import socketpair # pragma: no cover
def dummy_ssl_context():
if ssl is None:
return None
else:
return ssl.SSLContext(ssl.PROTOCOL_SSLv23)
def run_briefly(loop):
@tasks.coroutine
def once():
pass
gen = once()
t = tasks.Task(gen, loop=loop)
try:
loop.run_until_complete(t)
finally:
gen.close()
def run_once(loop):
"""loop.stop() schedules _raise_stop_error()
and run_forever() runs until _raise_stop_error() callback.
this wont work if test waits for some IO events, because
_raise_stop_error() runs before any of io events callbacks.
"""
loop.stop()
loop.run_forever()
@contextlib.contextmanager
def run_test_server(*, host='127.0.0.1', port=0, use_ssl=False):
class SilentWSGIRequestHandler(WSGIRequestHandler):
def get_stderr(self):
return io.StringIO()
def log_message(self, format, *args):
pass
class SilentWSGIServer(WSGIServer):
def handle_error(self, request, client_address):
pass
class SSLWSGIServer(SilentWSGIServer):
def finish_request(self, request, client_address):
# The relative location of our test directory (which
# contains the sample key and certificate files) differs
# between the stdlib and stand-alone Tulip/asyncio.
# Prefer our own if we can find it.
here = os.path.join(os.path.dirname(__file__), '..', 'tests')
if not os.path.isdir(here):
here = os.path.join(os.path.dirname(os.__file__),
'test', 'test_asyncio')
keyfile = os.path.join(here, 'sample.key')
certfile = os.path.join(here, 'sample.crt')
ssock = ssl.wrap_socket(request,
keyfile=keyfile,
certfile=certfile,
server_side=True)
try:
self.RequestHandlerClass(ssock, client_address, self)
ssock.close()
except OSError:
# maybe socket has been closed by peer
pass
def app(environ, start_response):
status = '200 OK'
headers = [('Content-type', 'text/plain')]
start_response(status, headers)
return [b'Test message']
# Run the test WSGI server in a separate thread in order not to
# interfere with event handling in the main thread
server_class = SSLWSGIServer if use_ssl else SilentWSGIServer
httpd = make_server(host, port, app,
server_class, SilentWSGIRequestHandler)
httpd.address = httpd.server_address
server_thread = threading.Thread(target=httpd.serve_forever)
server_thread.start()
try:
yield httpd
finally:
httpd.shutdown()
server_thread.join()
def make_test_protocol(base):
dct = {}
for name in dir(base):
if name.startswith('__') and name.endswith('__'):
# skip magic names
continue
dct[name] = unittest.mock.Mock(return_value=None)
return type('TestProtocol', (base,) + base.__bases__, dct)()
class TestSelector(selectors.BaseSelector):
def select(self, timeout):
return []
class TestLoop(base_events.BaseEventLoop):
"""Loop for unittests.
It manages self time directly.
If something scheduled to be executed later then
on next loop iteration after all ready handlers done
generator passed to __init__ is calling.
Generator should be like this:
def gen():
...
when = yield ...
... = yield time_advance
Value retuned by yield is absolute time of next scheduled handler.
Value passed to yield is time advance to move loop's time forward.
"""
def __init__(self, gen=None):
super().__init__()
if gen is None:
def gen():
yield
self._check_on_close = False
else:
self._check_on_close = True
self._gen = gen()
next(self._gen)
self._time = 0
self._timers = []
self._selector = TestSelector()
self.readers = {}
self.writers = {}
self.reset_counters()
def time(self):
return self._time
def advance_time(self, advance):
"""Move test time forward."""
if advance:
self._time += advance
def close(self):
if self._check_on_close:
try:
self._gen.send(0)
except StopIteration:
pass
else: # pragma: no cover
raise AssertionError("Time generator is not finished")
def add_reader(self, fd, callback, *args):
self.readers[fd] = events.make_handle(callback, args)
def remove_reader(self, fd):
self.remove_reader_count[fd] += 1
if fd in self.readers:
del self.readers[fd]
return True
else:
return False
def assert_reader(self, fd, callback, *args):
assert fd in self.readers, 'fd {} is not registered'.format(fd)
handle = self.readers[fd]
assert handle._callback == callback, '{!r} != {!r}'.format(
handle._callback, callback)
assert handle._args == args, '{!r} != {!r}'.format(
handle._args, args)
def add_writer(self, fd, callback, *args):
self.writers[fd] = events.make_handle(callback, args)
def remove_writer(self, fd):
self.remove_writer_count[fd] += 1
if fd in self.writers:
del self.writers[fd]
return True
else:
return False
def assert_writer(self, fd, callback, *args):
assert fd in self.writers, 'fd {} is not registered'.format(fd)
handle = self.writers[fd]
assert handle._callback == callback, '{!r} != {!r}'.format(
handle._callback, callback)
assert handle._args == args, '{!r} != {!r}'.format(
handle._args, args)
def reset_counters(self):
self.remove_reader_count = collections.defaultdict(int)
self.remove_writer_count = collections.defaultdict(int)
def _run_once(self):
super()._run_once()
for when in self._timers:
advance = self._gen.send(when)
self.advance_time(advance)
self._timers = []
def call_at(self, when, callback, *args):
self._timers.append(when)
return super().call_at(when, callback, *args)
def _process_events(self, event_list):
return
def _write_to_self(self):
pass
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