"""Utilities shared by tests.""" import collections import contextlib import io import logging import os import re import socket import socketserver import sys import tempfile import threading import time import unittest from unittest import mock from http.server import HTTPServer from wsgiref.simple_server import WSGIRequestHandler, WSGIServer try: import ssl except ImportError: # pragma: no cover ssl = None from . import base_events from . import events from . import futures from . import selectors from . import tasks from .coroutines import coroutine from .log import logger 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): @coroutine def once(): pass gen = once() t = loop.create_task(gen) # Don't log a warning if the task is not done after run_until_complete(). # It occurs if the loop is stopped or if a task raises a BaseException. t._log_destroy_pending = False try: loop.run_until_complete(t) finally: gen.close() def run_until(loop, pred, timeout=30): deadline = time.time() + timeout while not pred(): if timeout is not None: timeout = deadline - time.time() if timeout <= 0: raise futures.TimeoutError() loop.run_until_complete(tasks.sleep(0.001, loop=loop)) 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() class SilentWSGIRequestHandler(WSGIRequestHandler): def get_stderr(self): return io.StringIO() def log_message(self, format, *args): pass class SilentWSGIServer(WSGIServer): request_timeout = 2 def get_request(self): request, client_addr = super().get_request() request.settimeout(self.request_timeout) return request, client_addr def handle_error(self, request, client_address): pass class SSLWSGIServerMixin: def finish_request(self, request, client_address): # The relative location of our test directory (which # contains the ssl key and certificate files) differs # between the stdlib and stand-alone 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, 'ssl_key.pem') certfile = os.path.join(here, 'ssl_cert.pem') 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 class SSLWSGIServer(SSLWSGIServerMixin, SilentWSGIServer): pass def _run_test_server(*, address, use_ssl=False, server_cls, server_ssl_cls): 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 = server_ssl_cls if use_ssl else server_cls httpd = server_class(address, SilentWSGIRequestHandler) httpd.set_app(app) httpd.address = httpd.server_address server_thread = threading.Thread( target=lambda: httpd.serve_forever(poll_interval=0.05)) server_thread.start() try: yield httpd finally: httpd.shutdown() httpd.server_close() server_thread.join() if hasattr(socket, 'AF_UNIX'): class UnixHTTPServer(socketserver.UnixStreamServer, HTTPServer): def server_bind(self): socketserver.UnixStreamServer.server_bind(self) self.server_name = '127.0.0.1' self.server_port = 80 class UnixWSGIServer(UnixHTTPServer, WSGIServer): request_timeout = 2 def server_bind(self): UnixHTTPServer.server_bind(self) self.setup_environ() def get_request(self): request, client_addr = super().get_request() request.settimeout(self.request_timeout) # Code in the stdlib expects that get_request # will return a socket and a tuple (host, port). # However, this isn't true for UNIX sockets, # as the second return value will be a path; # hence we return some fake data sufficient # to get the tests going return request, ('127.0.0.1', '') class SilentUnixWSGIServer(UnixWSGIServer): def handle_error(self, request, client_address): pass class UnixSSLWSGIServer(SSLWSGIServerMixin, SilentUnixWSGIServer): pass def gen_unix_socket_path(): with tempfile.NamedTemporaryFile() as file: return file.name @contextlib.contextmanager def unix_socket_path(): path = gen_unix_socket_path() try: yield path finally: try: os.unlink(path) except OSError: pass @contextlib.contextmanager def run_test_unix_server(*, use_ssl=False): with unix_socket_path() as path: yield from _run_test_server(address=path, use_ssl=use_ssl, server_cls=SilentUnixWSGIServer, server_ssl_cls=UnixSSLWSGIServer) @contextlib.contextmanager def run_test_server(*, host='127.0.0.1', port=0, use_ssl=False): yield from _run_test_server(address=(host, port), use_ssl=use_ssl, server_cls=SilentWSGIServer, server_ssl_cls=SSLWSGIServer) def make_test_protocol(base): dct = {} for name in dir(base): if name.startswith('__') and name.endswith('__'): # skip magic names continue dct[name] = MockCallback(return_value=None) return type('TestProtocol', (base,) + base.__bases__, dct)() class TestSelector(selectors.BaseSelector): def __init__(self): self.keys = {} def register(self, fileobj, events, data=None): key = selectors.SelectorKey(fileobj, 0, events, data) self.keys[fileobj] = key return key def unregister(self, fileobj): return self.keys.pop(fileobj) def select(self, timeout): return [] def get_map(self): return self.keys 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 returned 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._clock_resolution = 1e-9 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.Handle(callback, args, self) 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.Handle(callback, args, self) 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 def MockCallback(**kwargs): return mock.Mock(spec=['__call__'], **kwargs) class MockPattern(str): """A regex based str with a fuzzy __eq__. Use this helper with 'mock.assert_called_with', or anywhere where a regex comparison between strings is needed. For instance: mock_call.assert_called_with(MockPattern('spam.*ham')) """ def __eq__(self, other): return bool(re.search(str(self), other, re.S)) def get_function_source(func): source = events._get_function_source(func) if source is None: raise ValueError("unable to get the source of %r" % (func,)) return source class TestCase(unittest.TestCase): def set_event_loop(self, loop, *, cleanup=True): assert loop is not None # ensure that the event loop is passed explicitly in asyncio events.set_event_loop(None) if cleanup: self.addCleanup(loop.close) def new_test_loop(self, gen=None): loop = TestLoop(gen) self.set_event_loop(loop) return loop def tearDown(self): events.set_event_loop(None) @contextlib.contextmanager def disable_logger(): """Context manager to disable asyncio logger. For example, it can be used to ignore warnings in debug mode. """ old_level = logger.level try: logger.setLevel(logging.CRITICAL+1) yield finally: logger.setLevel(old_level) def mock_nonblocking_socket(): """Create a mock of a non-blocking socket.""" sock = mock.Mock(socket.socket) sock.gettimeout.return_value = 0.0 return sock