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import unittest
try:
from test.test_asyncio.test_events import UnixEventLoopTestsMixin
from test.test_asyncio.test_subprocess import SubprocessMixin
from test.test_asyncio.utils import TestCase
except:
class UnixEventLoopTestsMixin():
def test_unix_event_loop_tests_missing(self):
import warnings
warnings.warn('UnixEventLoopTestsMixin is unavailable, not running tests!')
self.skipTest('UnixEventLoopTestsMixin is unavailable, not running tests!')
class SubprocessMixin():
def test_subprocess_mixin_tests_missing(self):
import warnings
warnings.warn('SubprocessMixin is unavailable, not running tests!')
self.skipTest('SubprocessMixin is unavailable, not running tests!')
from unittest import TestCase
import sys
import gi
import gi.events
import asyncio
import threading
from gi.repository import GLib, Gtk
# None of this currently works on Windows
if sys.platform != 'win32':
class GLibEventLoopTests(UnixEventLoopTestsMixin, TestCase):
def __init__(self, *args):
super().__init__(*args)
self.loop = None
def create_event_loop(self):
return gi.events.GLibEventLoop(GLib.MainContext())
class SubprocessWatcherTests(SubprocessMixin, TestCase):
def setUp(self):
super().setUp()
policy = gi.events.GLibEventLoopPolicy()
asyncio.set_event_loop_policy(policy)
self.loop = policy.get_event_loop()
def tearDown(self):
asyncio.set_event_loop_policy(None)
self.loop.close()
super().tearDown()
class GLibEventLoopPolicyTests(unittest.TestCase):
def create_policy(self):
return gi.events.GLibEventLoopPolicy()
def test_get_event_loop(self):
policy = self.create_policy()
loop = policy.get_event_loop()
self.assertIsInstance(loop, gi.events.GLibEventLoop)
self.assertIs(loop, policy.get_event_loop())
loop.close()
def test_new_event_loop(self):
policy = self.create_policy()
loop = policy.new_event_loop()
self.assertIsInstance(loop, gi.events.GLibEventLoop)
loop.close()
# Attaching a loop to the main thread fails
with self.assertRaises(RuntimeError):
policy.set_event_loop(loop)
def test_nested_context_iteration(self):
policy = self.create_policy()
loop = policy.new_event_loop()
called = False
def cb():
nonlocal called
called = True
async def run():
nonlocal loop, called
loop.call_soon(cb)
self.assertEqual(called, False)
# Iterating the main context does not cause cb to be called
while loop._context.iteration(False):
pass
self.assertEqual(called, False)
# Awaiting on anything *does* cause the cb to fire
await asyncio.sleep(0)
self.assertEqual(called, True)
loop.run_until_complete(run())
loop.close()
def test_outside_context_iteration(self):
"""Iterating the main context from the outside, does not cause the
EventLoop to dispatch."""
policy = self.create_policy()
loop = policy.new_event_loop()
called = False
def cb():
nonlocal called
called = True
loop.call_soon(cb)
while loop._context.iteration(False):
pass
loop.close()
self.assertEqual(called, False)
def test_inside_context_iteration(self):
"""Iterating the main context from the inside, does not cause the
EventLoop to dispatch."""
policy = self.create_policy()
loop = policy.get_event_loop()
done = asyncio.Future(loop=loop)
called = False
def cb():
nonlocal called
called = True
def ctx_iterate():
nonlocal called
loop.call_soon(cb)
while loop._context.iteration(False):
pass
self.assertEqual(called, False)
# If we by-pass the override, then the callback is called
while super(GLib.MainContext, loop._context).iteration(False):
pass
self.assertEqual(called, True)
# It'll also be called (again) before run_until_complete finishes
called = False
loop.call_soon(cb)
done.set_result(True)
return GLib.SOURCE_REMOVE
GLib.idle_add(ctx_iterate)
loop.run_until_complete(done)
loop.close()
self.assertEqual(called, True)
def test_recursive_stop(self):
"""Calling stop() on the EventLoop will quit it, even if iteration
is done recursively."""
policy = self.create_policy()
asyncio.set_event_loop_policy(policy)
self.addCleanup(asyncio.set_event_loop_policy, None)
loop = policy.get_event_loop()
def main_gtk():
GLib.idle_add(loop.stop)
Gtk.main()
GLib.idle_add(main_gtk)
Gtk.main()
def main_glib():
GLib.idle_add(loop.stop)
GLib.MainLoop().run()
GLib.idle_add(main_glib)
GLib.MainLoop().run()
loop.close()
def test_thread_event_loop(self):
policy = self.create_policy()
loop = policy.new_event_loop()
res = []
def thread_func(res):
try:
# We cannot get an event loop for the current thread
with self.assertRaises(RuntimeError):
policy.get_event_loop()
# We can attach our loop
policy.set_event_loop(loop)
# Now we can get it, and it is the same
self.assertIs(policy.get_event_loop(), loop)
# Simple call_soon test
results = []
def callback(arg1, arg2):
results.append((arg1, arg2))
loop.stop()
loop.call_soon(callback, 'hello', 'world')
loop.run_forever()
self.assertEqual(results, [('hello', 'world')])
# We can detach it again
policy.set_event_loop(None)
# Which means we have none and get a runtime error
with self.assertRaises(RuntimeError):
policy.get_event_loop()
except:
res += sys.exc_info()
# Initially, the thread has no event loop
thread = threading.Thread(target=lambda: thread_func(res))
thread.start()
thread.join()
if res:
t, v, tb = res
raise t(v).with_traceback(tb)
loop.close()
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