import asyncio
import unittest
from test import support
class MyException(Exception):
pass
def tearDownModule():
asyncio.set_event_loop_policy(None)
class TestAsyncCase(unittest.TestCase):
maxDiff = None
def tearDown(self):
# Ensure that IsolatedAsyncioTestCase instances are destroyed before
# starting a new event loop
support.gc_collect()
def test_full_cycle(self):
class Test(unittest.IsolatedAsyncioTestCase):
def setUp(self):
self.assertEqual(events, [])
events.append('setUp')
async def asyncSetUp(self):
self.assertEqual(events, ['setUp'])
events.append('asyncSetUp')
self.addAsyncCleanup(self.on_cleanup1)
async def test_func(self):
self.assertEqual(events, ['setUp',
'asyncSetUp'])
events.append('test')
self.addAsyncCleanup(self.on_cleanup2)
async def asyncTearDown(self):
self.assertEqual(events, ['setUp',
'asyncSetUp',
'test'])
events.append('asyncTearDown')
def tearDown(self):
self.assertEqual(events, ['setUp',
'asyncSetUp',
'test',
'asyncTearDown'])
events.append('tearDown')
async def on_cleanup1(self):
self.assertEqual(events, ['setUp',
'asyncSetUp',
'test',
'asyncTearDown',
'tearDown',
'cleanup2'])
events.append('cleanup1')
async def on_cleanup2(self):
self.assertEqual(events, ['setUp',
'asyncSetUp',
'test',
'asyncTearDown',
'tearDown'])
events.append('cleanup2')
events = []
test = Test("test_func")
result = test.run()
self.assertEqual(result.errors, [])
self.assertEqual(result.failures, [])
expected = ['setUp', 'asyncSetUp', 'test',
'asyncTearDown', 'tearDown', 'cleanup2', 'cleanup1']
self.assertEqual(events, expected)
events = []
test = Test("test_func")
test.debug()
self.assertEqual(events, expected)
test.doCleanups()
self.assertEqual(events, expected)
def test_exception_in_setup(self):
class Test(unittest.IsolatedAsyncioTestCase):
async def asyncSetUp(self):
events.append('asyncSetUp')
self.addAsyncCleanup(self.on_cleanup)
raise MyException()
async def test_func(self):
events.append('test')
async def asyncTearDown(self):
events.append('asyncTearDown')
async def on_cleanup(self):
events.append('cleanup')
events = []
test = Test("test_func")
result = test.run()
self.assertEqual(events, ['asyncSetUp', 'cleanup'])
self.assertIs(result.errors[0][0], test)
self.assertIn('MyException', result.errors[0][1])
events = []
test = Test("test_func")
try:
test.debug()
except MyException:
pass
else:
self.fail('Expected a MyException exception')
self.assertEqual(events, ['asyncSetUp'])
test.doCleanups()
self.assertEqual(events, ['asyncSetUp', 'cleanup'])
def test_exception_in_test(self):
class Test(unittest.IsolatedAsyncioTestCase):
async def asyncSetUp(self):
events.append('asyncSetUp')
async def test_func(self):
events.append('test')
self.addAsyncCleanup(self.on_cleanup)
raise MyException()
async def asyncTearDown(self):
events.append('asyncTearDown')
async def on_cleanup(self):
events.append('cleanup')
events = []
test = Test("test_func")
result = test.run()
self.assertEqual(events, ['asyncSetUp', 'test', 'asyncTearDown', 'cleanup'])
self.assertIs(result.errors[0][0], test)
self.assertIn('MyException', result.errors[0][1])
events = []
test = Test("test_func")
try:
test.debug()
except MyException:
pass
else:
self.fail('Expected a MyException exception')
self.assertEqual(events, ['asyncSetUp', 'test'])
test.doCleanups()
self.assertEqual(events, ['asyncSetUp', 'test', 'cleanup'])
def test_exception_in_tear_down(self):
class Test(unittest.IsolatedAsyncioTestCase):
async def asyncSetUp(self):
events.append('asyncSetUp')
async def test_func(self):
events.append('test')
self.addAsyncCleanup(self.on_cleanup)
async def asyncTearDown(self):
events.append('asyncTearDown')
raise MyException()
async def on_cleanup(self):
events.append('cleanup')
events = []
test = Test("test_func")
result = test.run()
self.assertEqual(events, ['asyncSetUp', 'test', 'asyncTearDown', 'cleanup'])
self.assertIs(result.errors[0][0], test)
self.assertIn('MyException', result.errors[0][1])
events = []
test = Test("test_func")
try:
test.debug()
except MyException:
pass
else:
self.fail('Expected a MyException exception')
self.assertEqual(events, ['asyncSetUp', 'test', 'asyncTearDown'])
test.doCleanups()
self.assertEqual(events, ['asyncSetUp', 'test', 'asyncTearDown', 'cleanup'])
def test_exception_in_tear_clean_up(self):
class Test(unittest.IsolatedAsyncioTestCase):
async def asyncSetUp(self):
events.append('asyncSetUp')
async def test_func(self):
events.append('test')
self.addAsyncCleanup(self.on_cleanup1)
self.addAsyncCleanup(self.on_cleanup2)
async def asyncTearDown(self):
events.append('asyncTearDown')
async def on_cleanup1(self):
events.append('cleanup1')
raise MyException('some error')
async def on_cleanup2(self):
events.append('cleanup2')
raise MyException('other error')
events = []
test = Test("test_func")
result = test.run()
self.assertEqual(events, ['asyncSetUp', 'test', 'asyncTearDown', 'cleanup2', 'cleanup1'])
self.assertIs(result.errors[0][0], test)
self.assertIn('MyException: other error', result.errors[0][1])
self.assertIn('MyException: some error', result.errors[1][1])
events = []
test = Test("test_func")
try:
test.debug()
except MyException:
pass
else:
self.fail('Expected a MyException exception')
self.assertEqual(events, ['asyncSetUp', 'test', 'asyncTearDown', 'cleanup2'])
test.doCleanups()
self.assertEqual(events, ['asyncSetUp', 'test', 'asyncTearDown', 'cleanup2', 'cleanup1'])
def test_cleanups_interleave_order(self):
events = []
class Test(unittest.IsolatedAsyncioTestCase):
async def test_func(self):
self.addAsyncCleanup(self.on_sync_cleanup, 1)
self.addAsyncCleanup(self.on_async_cleanup, 2)
self.addAsyncCleanup(self.on_sync_cleanup, 3)
self.addAsyncCleanup(self.on_async_cleanup, 4)
async def on_sync_cleanup(self, val):
events.append(f'sync_cleanup {val}')
async def on_async_cleanup(self, val):
events.append(f'async_cleanup {val}')
test = Test("test_func")
test.run()
self.assertEqual(events, ['async_cleanup 4',
'sync_cleanup 3',
'async_cleanup 2',
'sync_cleanup 1'])
def test_base_exception_from_async_method(self):
events = []
class Test(unittest.IsolatedAsyncioTestCase):
async def test_base(self):
events.append("test_base")
raise BaseException()
events.append("not it")
async def test_no_err(self):
events.append("test_no_err")
async def test_cancel(self):
raise asyncio.CancelledError()
test = Test("test_base")
output = test.run()
self.assertFalse(output.wasSuccessful())
test = Test("test_no_err")
test.run()
self.assertEqual(events, ['test_base', 'test_no_err'])
test = Test("test_cancel")
output = test.run()
self.assertFalse(output.wasSuccessful())
def test_cancellation_hanging_tasks(self):
cancelled = False
class Test(unittest.IsolatedAsyncioTestCase):
async def test_leaking_task(self):
async def coro():
nonlocal cancelled
try:
await asyncio.sleep(1)
except asyncio.CancelledError:
cancelled = True
raise
# Leave this running in the background
asyncio.create_task(coro())
test = Test("test_leaking_task")
output = test.run()
self.assertTrue(cancelled)
if __name__ == "__main__":
unittest.main()