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from __future__ import annotations
import asyncio
import os
import sys
import typing
import unittest
import urwid
class EventLoopTestMixin:
def test_event_loop(self):
rd, wr = os.pipe()
evl: urwid.EventLoop = self.evl
out = []
def step1():
out.append("writing")
os.write(wr, b"hi")
def step2():
out.append(os.read(rd, 2).decode('ascii'))
raise urwid.ExitMainLoop
_handle = evl.alarm(0, step1)
_handle = evl.watch_file(rd, step2)
evl.run()
self.assertEqual(out, ["writing", "hi"])
def test_remove_alarm(self):
evl: urwid.EventLoop = self.evl
handle = evl.alarm(50, lambda: None)
def step1():
self.assertTrue(evl.remove_alarm(handle))
self.assertFalse(evl.remove_alarm(handle))
raise urwid.ExitMainLoop
evl.alarm(0, step1)
evl.run()
def test_remove_watch_file(self):
evl: urwid.EventLoop = self.evl
fd_r, fd_w = os.pipe()
try:
handle = evl.watch_file(fd_r, lambda: None)
def step1():
self.assertTrue(evl.remove_watch_file(handle))
self.assertFalse(evl.remove_watch_file(handle))
raise urwid.ExitMainLoop
evl.alarm(0, step1)
evl.run()
finally:
os.close(fd_r)
os.close(fd_w)
_expected_idle_handle = 1
def test_run(self):
evl: urwid.EventLoop = self.evl
out = []
rd, wr = os.pipe()
self.assertEqual(os.write(wr, b"data"), 4)
def say_hello():
out.append("hello")
def say_waiting():
out.append("waiting")
def exit_clean() -> typing.NoReturn:
out.append("clean exit")
raise urwid.ExitMainLoop
def exit_error() -> typing.NoReturn:
1/0
_handle = evl.alarm(0.01, exit_clean)
_handle = evl.alarm(0.005, say_hello)
idle_handle = evl.enter_idle(say_waiting)
if self._expected_idle_handle is not None:
self.assertEqual(idle_handle, 1)
evl.run()
self.assertTrue("waiting" in out, out)
self.assertTrue("hello" in out, out)
self.assertTrue("clean exit" in out, out)
handle = evl.watch_file(rd, exit_clean)
del out[:]
evl.run()
self.assertEqual(["clean exit"], out)
self.assertTrue(evl.remove_watch_file(handle))
_handle = evl.alarm(0, exit_error)
self.assertRaises(ZeroDivisionError, evl.run)
_handle = evl.watch_file(rd, exit_error)
self.assertRaises(ZeroDivisionError, evl.run)
class SelectEventLoopTest(unittest.TestCase, EventLoopTestMixin):
def setUp(self):
self.evl = urwid.SelectEventLoop()
try:
import gi.repository
except ImportError:
pass
else:
class GLibEventLoopTest(unittest.TestCase, EventLoopTestMixin):
def setUp(self):
self.evl = urwid.GLibEventLoop()
def test_error(self):
evl = self.evl
evl.alarm(0, lambda: 1 / 0) # Simulate error in event loop
self.assertRaises(ZeroDivisionError, evl.run)
try:
import tornado
except ImportError:
pass
else:
class TornadoEventLoopTest(unittest.TestCase, EventLoopTestMixin):
def setUp(self):
from tornado.ioloop import IOLoop
self.evl = urwid.TornadoEventLoop(IOLoop())
_expected_idle_handle = None
try:
import twisted
except ImportError:
pass
else:
class TwistedEventLoopTest(unittest.TestCase, EventLoopTestMixin):
def setUp(self):
self.evl = urwid.TwistedEventLoop()
# can't restart twisted reactor, so use shortened tests
def test_event_loop(self):
pass
def test_remove_alarm(self):
pass
def test_remove_watch_file(self):
pass
def test_run(self):
evl = self.evl
out = []
rd, wr = os.pipe()
self.assertEqual(os.write(wr, b"data"), 4)
def step2():
out.append(os.read(rd, 2).decode('ascii'))
def say_hello():
out.append("hello")
def say_waiting():
out.append("waiting")
def test_remove_alarm():
handle = evl.alarm(50, lambda: None)
self.assertTrue(evl.remove_alarm(handle))
self.assertFalse(evl.remove_alarm(handle))
out.append("remove_alarm ok")
def test_remove_watch_file():
fd_r, fd_w = os.pipe()
try:
handle = evl.watch_file(fd_r, lambda: None)
self.assertTrue(evl.remove_watch_file(handle))
self.assertFalse(evl.remove_watch_file(handle))
finally:
os.close(fd_r)
os.close(fd_w)
out.append("remove_watch_file ok")
def exit_clean() -> typing.NoReturn:
out.append("clean exit")
raise urwid.ExitMainLoop
def exit_error() -> typing.NoReturn:
1/0
_handle = evl.watch_file(rd, step2)
_handle = evl.alarm(0.1, exit_clean)
_handle = evl.alarm(0.05, say_hello)
_handle = evl.alarm(0.06, test_remove_alarm)
_handle = evl.alarm(0.07, test_remove_watch_file)
self.assertEqual(evl.enter_idle(say_waiting), 1)
evl.run()
self.assertTrue("da" in out, out)
self.assertTrue("ta" in out, out)
self.assertTrue("hello" in out, out)
self.assertTrue("remove_alarm ok" in out, out)
self.assertTrue("clean exit" in out, out)
def test_error(self):
evl = self.evl
evl.alarm(0, lambda: 1 / 0) # Simulate error in event loop
self.assertRaises(ZeroDivisionError, evl.run)
class AsyncioEventLoopTest(unittest.TestCase, EventLoopTestMixin):
def setUp(self):
self.evl = urwid.AsyncioEventLoop()
_expected_idle_handle = None
def test_error(self):
evl = self.evl
evl.alarm(0, lambda: 1 / 0) # Simulate error in event loop
self.assertRaises(ZeroDivisionError, evl.run)
@unittest.skipIf(
sys.implementation.name == "pypy",
"Well known dead wait (lock?) on pypy.",
)
def test_coroutine_error(self):
evl = self.evl
async def error_coro():
result = 1 / 0 # Simulate error in coroutine
return result
asyncio.ensure_future(error_coro(), loop=asyncio.get_event_loop_policy().get_event_loop())
self.assertRaises(ZeroDivisionError, evl.run)
try:
import trio
except ImportError:
pass
else:
class TrioEventLoopTest(unittest.TestCase, EventLoopTestMixin):
def setUp(self):
self.evl = urwid.TrioEventLoop()
_expected_idle_handle = None
def test_error(self):
evl = self.evl
evl.alarm(0, lambda: 1 / 0) # Simulate error in event loop
self.assertRaises(ZeroDivisionError, evl.run)
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