mirror of https://github.com/python/cpython
1678 lines
47 KiB
Python
1678 lines
47 KiB
Python
import inspect
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import types
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import unittest
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import contextlib
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from test.support.import_helper import import_module
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from test.support import gc_collect, requires_working_socket
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asyncio = import_module("asyncio")
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requires_working_socket(module=True)
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_no_default = object()
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class AwaitException(Exception):
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pass
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@types.coroutine
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def awaitable(*, throw=False):
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if throw:
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yield ('throw',)
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else:
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yield ('result',)
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def run_until_complete(coro):
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exc = False
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while True:
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try:
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if exc:
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exc = False
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fut = coro.throw(AwaitException)
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else:
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fut = coro.send(None)
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except StopIteration as ex:
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return ex.args[0]
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if fut == ('throw',):
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exc = True
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def to_list(gen):
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async def iterate():
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res = []
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async for i in gen:
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res.append(i)
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return res
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return run_until_complete(iterate())
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def py_anext(iterator, default=_no_default):
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"""Pure-Python implementation of anext() for testing purposes.
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Closely matches the builtin anext() C implementation.
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Can be used to compare the built-in implementation of the inner
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coroutines machinery to C-implementation of __anext__() and send()
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or throw() on the returned generator.
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"""
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try:
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__anext__ = type(iterator).__anext__
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except AttributeError:
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raise TypeError(f'{iterator!r} is not an async iterator')
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if default is _no_default:
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return __anext__(iterator)
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async def anext_impl():
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try:
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# The C code is way more low-level than this, as it implements
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# all methods of the iterator protocol. In this implementation
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# we're relying on higher-level coroutine concepts, but that's
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# exactly what we want -- crosstest pure-Python high-level
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# implementation and low-level C anext() iterators.
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return await __anext__(iterator)
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except StopAsyncIteration:
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return default
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return anext_impl()
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class AsyncGenSyntaxTest(unittest.TestCase):
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def test_async_gen_syntax_01(self):
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code = '''async def foo():
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await abc
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yield from 123
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'''
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with self.assertRaisesRegex(SyntaxError, 'yield from.*inside async'):
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exec(code, {}, {})
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def test_async_gen_syntax_02(self):
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code = '''async def foo():
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yield from 123
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'''
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with self.assertRaisesRegex(SyntaxError, 'yield from.*inside async'):
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exec(code, {}, {})
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def test_async_gen_syntax_03(self):
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code = '''async def foo():
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await abc
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yield
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return 123
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'''
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with self.assertRaisesRegex(SyntaxError, 'return.*value.*async gen'):
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exec(code, {}, {})
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def test_async_gen_syntax_04(self):
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code = '''async def foo():
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yield
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return 123
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'''
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with self.assertRaisesRegex(SyntaxError, 'return.*value.*async gen'):
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exec(code, {}, {})
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def test_async_gen_syntax_05(self):
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code = '''async def foo():
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if 0:
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yield
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return 12
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'''
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with self.assertRaisesRegex(SyntaxError, 'return.*value.*async gen'):
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exec(code, {}, {})
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class AsyncGenTest(unittest.TestCase):
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def compare_generators(self, sync_gen, async_gen):
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def sync_iterate(g):
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res = []
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while True:
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try:
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res.append(g.__next__())
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except StopIteration:
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res.append('STOP')
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break
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except Exception as ex:
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res.append(str(type(ex)))
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return res
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def async_iterate(g):
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res = []
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while True:
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an = g.__anext__()
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try:
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while True:
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try:
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an.__next__()
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except StopIteration as ex:
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if ex.args:
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res.append(ex.args[0])
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break
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else:
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res.append('EMPTY StopIteration')
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break
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except StopAsyncIteration:
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raise
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except Exception as ex:
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res.append(str(type(ex)))
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break
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except StopAsyncIteration:
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res.append('STOP')
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break
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return res
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sync_gen_result = sync_iterate(sync_gen)
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async_gen_result = async_iterate(async_gen)
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self.assertEqual(sync_gen_result, async_gen_result)
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return async_gen_result
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def test_async_gen_iteration_01(self):
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async def gen():
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await awaitable()
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a = yield 123
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self.assertIs(a, None)
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await awaitable()
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yield 456
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await awaitable()
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yield 789
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self.assertEqual(to_list(gen()), [123, 456, 789])
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def test_async_gen_iteration_02(self):
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async def gen():
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await awaitable()
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yield 123
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await awaitable()
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g = gen()
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ai = g.__aiter__()
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an = ai.__anext__()
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self.assertEqual(an.__next__(), ('result',))
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try:
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an.__next__()
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except StopIteration as ex:
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self.assertEqual(ex.args[0], 123)
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else:
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self.fail('StopIteration was not raised')
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an = ai.__anext__()
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self.assertEqual(an.__next__(), ('result',))
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try:
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an.__next__()
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except StopAsyncIteration as ex:
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self.assertFalse(ex.args)
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else:
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self.fail('StopAsyncIteration was not raised')
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def test_async_gen_exception_03(self):
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async def gen():
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await awaitable()
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yield 123
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await awaitable(throw=True)
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yield 456
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with self.assertRaises(AwaitException):
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to_list(gen())
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def test_async_gen_exception_04(self):
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async def gen():
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await awaitable()
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yield 123
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1 / 0
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g = gen()
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ai = g.__aiter__()
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an = ai.__anext__()
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self.assertEqual(an.__next__(), ('result',))
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try:
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an.__next__()
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except StopIteration as ex:
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self.assertEqual(ex.args[0], 123)
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else:
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self.fail('StopIteration was not raised')
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with self.assertRaises(ZeroDivisionError):
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ai.__anext__().__next__()
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def test_async_gen_exception_05(self):
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async def gen():
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yield 123
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raise StopAsyncIteration
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with self.assertRaisesRegex(RuntimeError,
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'async generator.*StopAsyncIteration'):
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to_list(gen())
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def test_async_gen_exception_06(self):
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async def gen():
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yield 123
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raise StopIteration
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with self.assertRaisesRegex(RuntimeError,
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'async generator.*StopIteration'):
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to_list(gen())
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def test_async_gen_exception_07(self):
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def sync_gen():
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try:
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yield 1
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1 / 0
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finally:
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yield 2
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yield 3
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yield 100
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async def async_gen():
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try:
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yield 1
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1 / 0
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finally:
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yield 2
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yield 3
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yield 100
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self.compare_generators(sync_gen(), async_gen())
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def test_async_gen_exception_08(self):
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def sync_gen():
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try:
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yield 1
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finally:
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yield 2
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1 / 0
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yield 3
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yield 100
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async def async_gen():
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try:
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yield 1
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await awaitable()
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finally:
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await awaitable()
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yield 2
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1 / 0
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yield 3
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yield 100
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self.compare_generators(sync_gen(), async_gen())
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def test_async_gen_exception_09(self):
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def sync_gen():
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try:
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yield 1
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1 / 0
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finally:
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yield 2
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yield 3
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yield 100
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async def async_gen():
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try:
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await awaitable()
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yield 1
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1 / 0
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finally:
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yield 2
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await awaitable()
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yield 3
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yield 100
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self.compare_generators(sync_gen(), async_gen())
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def test_async_gen_exception_10(self):
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async def gen():
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yield 123
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with self.assertRaisesRegex(TypeError,
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"non-None value .* async generator"):
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gen().__anext__().send(100)
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def test_async_gen_exception_11(self):
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def sync_gen():
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yield 10
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yield 20
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def sync_gen_wrapper():
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yield 1
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sg = sync_gen()
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sg.send(None)
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try:
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sg.throw(GeneratorExit())
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except GeneratorExit:
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yield 2
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yield 3
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async def async_gen():
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yield 10
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yield 20
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async def async_gen_wrapper():
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yield 1
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asg = async_gen()
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await asg.asend(None)
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try:
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await asg.athrow(GeneratorExit())
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except GeneratorExit:
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yield 2
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yield 3
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self.compare_generators(sync_gen_wrapper(), async_gen_wrapper())
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def test_async_gen_api_01(self):
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async def gen():
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yield 123
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g = gen()
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self.assertEqual(g.__name__, 'gen')
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g.__name__ = '123'
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self.assertEqual(g.__name__, '123')
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self.assertIn('.gen', g.__qualname__)
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g.__qualname__ = '123'
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self.assertEqual(g.__qualname__, '123')
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self.assertIsNone(g.ag_await)
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self.assertIsInstance(g.ag_frame, types.FrameType)
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self.assertFalse(g.ag_running)
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self.assertIsInstance(g.ag_code, types.CodeType)
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self.assertTrue(inspect.isawaitable(g.aclose()))
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class AsyncGenAsyncioTest(unittest.TestCase):
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def setUp(self):
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self.loop = asyncio.new_event_loop()
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asyncio.set_event_loop(None)
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def tearDown(self):
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self.loop.close()
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self.loop = None
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asyncio.set_event_loop_policy(None)
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def check_async_iterator_anext(self, ait_class):
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with self.subTest(anext="pure-Python"):
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self._check_async_iterator_anext(ait_class, py_anext)
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with self.subTest(anext="builtin"):
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self._check_async_iterator_anext(ait_class, anext)
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def _check_async_iterator_anext(self, ait_class, anext):
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g = ait_class()
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async def consume():
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results = []
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results.append(await anext(g))
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results.append(await anext(g))
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results.append(await anext(g, 'buckle my shoe'))
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return results
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res = self.loop.run_until_complete(consume())
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self.assertEqual(res, [1, 2, 'buckle my shoe'])
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with self.assertRaises(StopAsyncIteration):
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self.loop.run_until_complete(consume())
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async def test_2():
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g1 = ait_class()
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self.assertEqual(await anext(g1), 1)
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self.assertEqual(await anext(g1), 2)
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with self.assertRaises(StopAsyncIteration):
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await anext(g1)
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with self.assertRaises(StopAsyncIteration):
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await anext(g1)
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g2 = ait_class()
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self.assertEqual(await anext(g2, "default"), 1)
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self.assertEqual(await anext(g2, "default"), 2)
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self.assertEqual(await anext(g2, "default"), "default")
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self.assertEqual(await anext(g2, "default"), "default")
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return "completed"
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result = self.loop.run_until_complete(test_2())
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self.assertEqual(result, "completed")
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def test_send():
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p = ait_class()
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obj = anext(p, "completed")
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with self.assertRaises(StopIteration):
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with contextlib.closing(obj.__await__()) as g:
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g.send(None)
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test_send()
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async def test_throw():
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p = ait_class()
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obj = anext(p, "completed")
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self.assertRaises(SyntaxError, obj.throw, SyntaxError)
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return "completed"
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result = self.loop.run_until_complete(test_throw())
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self.assertEqual(result, "completed")
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def test_async_generator_anext(self):
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async def agen():
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yield 1
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yield 2
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self.check_async_iterator_anext(agen)
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def test_python_async_iterator_anext(self):
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class MyAsyncIter:
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"""Asynchronously yield 1, then 2."""
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def __init__(self):
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self.yielded = 0
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def __aiter__(self):
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return self
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async def __anext__(self):
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if self.yielded >= 2:
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raise StopAsyncIteration()
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else:
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self.yielded += 1
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return self.yielded
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self.check_async_iterator_anext(MyAsyncIter)
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def test_python_async_iterator_types_coroutine_anext(self):
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import types
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class MyAsyncIterWithTypesCoro:
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"""Asynchronously yield 1, then 2."""
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def __init__(self):
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self.yielded = 0
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def __aiter__(self):
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return self
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@types.coroutine
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def __anext__(self):
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if False:
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yield "this is a generator-based coroutine"
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if self.yielded >= 2:
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raise StopAsyncIteration()
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else:
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self.yielded += 1
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return self.yielded
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self.check_async_iterator_anext(MyAsyncIterWithTypesCoro)
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|
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def test_async_gen_aiter(self):
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async def gen():
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yield 1
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yield 2
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g = gen()
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async def consume():
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return [i async for i in aiter(g)]
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res = self.loop.run_until_complete(consume())
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self.assertEqual(res, [1, 2])
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|
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def test_async_gen_aiter_class(self):
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results = []
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class Gen:
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async def __aiter__(self):
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yield 1
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yield 2
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g = Gen()
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async def consume():
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ait = aiter(g)
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while True:
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try:
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results.append(await anext(ait))
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except StopAsyncIteration:
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break
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self.loop.run_until_complete(consume())
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self.assertEqual(results, [1, 2])
|
|
|
|
def test_aiter_idempotent(self):
|
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async def gen():
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yield 1
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applied_once = aiter(gen())
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applied_twice = aiter(applied_once)
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self.assertIs(applied_once, applied_twice)
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|
|
|
def test_anext_bad_args(self):
|
|
async def gen():
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yield 1
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async def call_with_too_few_args():
|
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await anext()
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async def call_with_too_many_args():
|
|
await anext(gen(), 1, 3)
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|
async def call_with_wrong_type_args():
|
|
await anext(1, gen())
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|
async def call_with_kwarg():
|
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await anext(aiterator=gen())
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with self.assertRaises(TypeError):
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self.loop.run_until_complete(call_with_too_few_args())
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|
with self.assertRaises(TypeError):
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self.loop.run_until_complete(call_with_too_many_args())
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|
with self.assertRaises(TypeError):
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self.loop.run_until_complete(call_with_wrong_type_args())
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|
with self.assertRaises(TypeError):
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self.loop.run_until_complete(call_with_kwarg())
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|
|
|
def test_anext_bad_await(self):
|
|
async def bad_awaitable():
|
|
class BadAwaitable:
|
|
def __await__(self):
|
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return 42
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|
class MyAsyncIter:
|
|
def __aiter__(self):
|
|
return self
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|
def __anext__(self):
|
|
return BadAwaitable()
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regex = r"__await__.*iterator"
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|
awaitable = anext(MyAsyncIter(), "default")
|
|
with self.assertRaisesRegex(TypeError, regex):
|
|
await awaitable
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|
awaitable = anext(MyAsyncIter())
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|
with self.assertRaisesRegex(TypeError, regex):
|
|
await awaitable
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|
return "completed"
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result = self.loop.run_until_complete(bad_awaitable())
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self.assertEqual(result, "completed")
|
|
|
|
async def check_anext_returning_iterator(self, aiter_class):
|
|
awaitable = anext(aiter_class(), "default")
|
|
with self.assertRaises(TypeError):
|
|
await awaitable
|
|
awaitable = anext(aiter_class())
|
|
with self.assertRaises(TypeError):
|
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await awaitable
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|
return "completed"
|
|
|
|
def test_anext_return_iterator(self):
|
|
class WithIterAnext:
|
|
def __aiter__(self):
|
|
return self
|
|
def __anext__(self):
|
|
return iter("abc")
|
|
result = self.loop.run_until_complete(self.check_anext_returning_iterator(WithIterAnext))
|
|
self.assertEqual(result, "completed")
|
|
|
|
def test_anext_return_generator(self):
|
|
class WithGenAnext:
|
|
def __aiter__(self):
|
|
return self
|
|
def __anext__(self):
|
|
yield
|
|
result = self.loop.run_until_complete(self.check_anext_returning_iterator(WithGenAnext))
|
|
self.assertEqual(result, "completed")
|
|
|
|
def test_anext_await_raises(self):
|
|
class RaisingAwaitable:
|
|
def __await__(self):
|
|
raise ZeroDivisionError()
|
|
yield
|
|
class WithRaisingAwaitableAnext:
|
|
def __aiter__(self):
|
|
return self
|
|
def __anext__(self):
|
|
return RaisingAwaitable()
|
|
async def do_test():
|
|
awaitable = anext(WithRaisingAwaitableAnext())
|
|
with self.assertRaises(ZeroDivisionError):
|
|
await awaitable
|
|
awaitable = anext(WithRaisingAwaitableAnext(), "default")
|
|
with self.assertRaises(ZeroDivisionError):
|
|
await awaitable
|
|
return "completed"
|
|
result = self.loop.run_until_complete(do_test())
|
|
self.assertEqual(result, "completed")
|
|
|
|
def test_anext_iter(self):
|
|
@types.coroutine
|
|
def _async_yield(v):
|
|
return (yield v)
|
|
|
|
class MyError(Exception):
|
|
pass
|
|
|
|
async def agenfn():
|
|
try:
|
|
await _async_yield(1)
|
|
except MyError:
|
|
await _async_yield(2)
|
|
return
|
|
yield
|
|
|
|
def test1(anext):
|
|
agen = agenfn()
|
|
with contextlib.closing(anext(agen, "default").__await__()) as g:
|
|
self.assertEqual(g.send(None), 1)
|
|
self.assertEqual(g.throw(MyError, MyError(), None), 2)
|
|
try:
|
|
g.send(None)
|
|
except StopIteration as e:
|
|
err = e
|
|
else:
|
|
self.fail('StopIteration was not raised')
|
|
self.assertEqual(err.value, "default")
|
|
|
|
def test2(anext):
|
|
agen = agenfn()
|
|
with contextlib.closing(anext(agen, "default").__await__()) as g:
|
|
self.assertEqual(g.send(None), 1)
|
|
self.assertEqual(g.throw(MyError, MyError(), None), 2)
|
|
with self.assertRaises(MyError):
|
|
g.throw(MyError, MyError(), None)
|
|
|
|
def test3(anext):
|
|
agen = agenfn()
|
|
with contextlib.closing(anext(agen, "default").__await__()) as g:
|
|
self.assertEqual(g.send(None), 1)
|
|
g.close()
|
|
with self.assertRaisesRegex(RuntimeError, 'cannot reuse'):
|
|
self.assertEqual(g.send(None), 1)
|
|
|
|
def test4(anext):
|
|
@types.coroutine
|
|
def _async_yield(v):
|
|
yield v * 10
|
|
return (yield (v * 10 + 1))
|
|
|
|
async def agenfn():
|
|
try:
|
|
await _async_yield(1)
|
|
except MyError:
|
|
await _async_yield(2)
|
|
return
|
|
yield
|
|
|
|
agen = agenfn()
|
|
with contextlib.closing(anext(agen, "default").__await__()) as g:
|
|
self.assertEqual(g.send(None), 10)
|
|
self.assertEqual(g.throw(MyError, MyError(), None), 20)
|
|
with self.assertRaisesRegex(MyError, 'val'):
|
|
g.throw(MyError, MyError('val'), None)
|
|
|
|
def test5(anext):
|
|
@types.coroutine
|
|
def _async_yield(v):
|
|
yield v * 10
|
|
return (yield (v * 10 + 1))
|
|
|
|
async def agenfn():
|
|
try:
|
|
await _async_yield(1)
|
|
except MyError:
|
|
return
|
|
yield 'aaa'
|
|
|
|
agen = agenfn()
|
|
with contextlib.closing(anext(agen, "default").__await__()) as g:
|
|
self.assertEqual(g.send(None), 10)
|
|
with self.assertRaisesRegex(StopIteration, 'default'):
|
|
g.throw(MyError, MyError(), None)
|
|
|
|
def test6(anext):
|
|
@types.coroutine
|
|
def _async_yield(v):
|
|
yield v * 10
|
|
return (yield (v * 10 + 1))
|
|
|
|
async def agenfn():
|
|
await _async_yield(1)
|
|
yield 'aaa'
|
|
|
|
agen = agenfn()
|
|
with contextlib.closing(anext(agen, "default").__await__()) as g:
|
|
with self.assertRaises(MyError):
|
|
g.throw(MyError, MyError(), None)
|
|
|
|
def run_test(test):
|
|
with self.subTest('pure-Python anext()'):
|
|
test(py_anext)
|
|
with self.subTest('builtin anext()'):
|
|
test(anext)
|
|
|
|
run_test(test1)
|
|
run_test(test2)
|
|
run_test(test3)
|
|
run_test(test4)
|
|
run_test(test5)
|
|
run_test(test6)
|
|
|
|
def test_aiter_bad_args(self):
|
|
async def gen():
|
|
yield 1
|
|
async def call_with_too_few_args():
|
|
await aiter()
|
|
async def call_with_too_many_args():
|
|
await aiter(gen(), 1)
|
|
async def call_with_wrong_type_arg():
|
|
await aiter(1)
|
|
with self.assertRaises(TypeError):
|
|
self.loop.run_until_complete(call_with_too_few_args())
|
|
with self.assertRaises(TypeError):
|
|
self.loop.run_until_complete(call_with_too_many_args())
|
|
with self.assertRaises(TypeError):
|
|
self.loop.run_until_complete(call_with_wrong_type_arg())
|
|
|
|
async def to_list(self, gen):
|
|
res = []
|
|
async for i in gen:
|
|
res.append(i)
|
|
return res
|
|
|
|
def test_async_gen_asyncio_01(self):
|
|
async def gen():
|
|
yield 1
|
|
await asyncio.sleep(0.01)
|
|
yield 2
|
|
await asyncio.sleep(0.01)
|
|
return
|
|
yield 3
|
|
|
|
res = self.loop.run_until_complete(self.to_list(gen()))
|
|
self.assertEqual(res, [1, 2])
|
|
|
|
def test_async_gen_asyncio_02(self):
|
|
async def gen():
|
|
yield 1
|
|
await asyncio.sleep(0.01)
|
|
yield 2
|
|
1 / 0
|
|
yield 3
|
|
|
|
with self.assertRaises(ZeroDivisionError):
|
|
self.loop.run_until_complete(self.to_list(gen()))
|
|
|
|
def test_async_gen_asyncio_03(self):
|
|
loop = self.loop
|
|
|
|
class Gen:
|
|
async def __aiter__(self):
|
|
yield 1
|
|
await asyncio.sleep(0.01)
|
|
yield 2
|
|
|
|
res = loop.run_until_complete(self.to_list(Gen()))
|
|
self.assertEqual(res, [1, 2])
|
|
|
|
def test_async_gen_asyncio_anext_04(self):
|
|
async def foo():
|
|
yield 1
|
|
await asyncio.sleep(0.01)
|
|
try:
|
|
yield 2
|
|
yield 3
|
|
except ZeroDivisionError:
|
|
yield 1000
|
|
await asyncio.sleep(0.01)
|
|
yield 4
|
|
|
|
async def run1():
|
|
it = foo().__aiter__()
|
|
|
|
self.assertEqual(await it.__anext__(), 1)
|
|
self.assertEqual(await it.__anext__(), 2)
|
|
self.assertEqual(await it.__anext__(), 3)
|
|
self.assertEqual(await it.__anext__(), 4)
|
|
with self.assertRaises(StopAsyncIteration):
|
|
await it.__anext__()
|
|
with self.assertRaises(StopAsyncIteration):
|
|
await it.__anext__()
|
|
|
|
async def run2():
|
|
it = foo().__aiter__()
|
|
|
|
self.assertEqual(await it.__anext__(), 1)
|
|
self.assertEqual(await it.__anext__(), 2)
|
|
try:
|
|
it.__anext__().throw(ZeroDivisionError)
|
|
except StopIteration as ex:
|
|
self.assertEqual(ex.args[0], 1000)
|
|
else:
|
|
self.fail('StopIteration was not raised')
|
|
self.assertEqual(await it.__anext__(), 4)
|
|
with self.assertRaises(StopAsyncIteration):
|
|
await it.__anext__()
|
|
|
|
self.loop.run_until_complete(run1())
|
|
self.loop.run_until_complete(run2())
|
|
|
|
def test_async_gen_asyncio_anext_05(self):
|
|
async def foo():
|
|
v = yield 1
|
|
v = yield v
|
|
yield v * 100
|
|
|
|
async def run():
|
|
it = foo().__aiter__()
|
|
|
|
try:
|
|
it.__anext__().send(None)
|
|
except StopIteration as ex:
|
|
self.assertEqual(ex.args[0], 1)
|
|
else:
|
|
self.fail('StopIteration was not raised')
|
|
|
|
try:
|
|
it.__anext__().send(10)
|
|
except StopIteration as ex:
|
|
self.assertEqual(ex.args[0], 10)
|
|
else:
|
|
self.fail('StopIteration was not raised')
|
|
|
|
try:
|
|
it.__anext__().send(12)
|
|
except StopIteration as ex:
|
|
self.assertEqual(ex.args[0], 1200)
|
|
else:
|
|
self.fail('StopIteration was not raised')
|
|
|
|
with self.assertRaises(StopAsyncIteration):
|
|
await it.__anext__()
|
|
|
|
self.loop.run_until_complete(run())
|
|
|
|
def test_async_gen_asyncio_anext_06(self):
|
|
DONE = 0
|
|
|
|
# test synchronous generators
|
|
def foo():
|
|
try:
|
|
yield
|
|
except:
|
|
pass
|
|
g = foo()
|
|
g.send(None)
|
|
with self.assertRaises(StopIteration):
|
|
g.send(None)
|
|
|
|
# now with asynchronous generators
|
|
|
|
async def gen():
|
|
nonlocal DONE
|
|
try:
|
|
yield
|
|
except:
|
|
pass
|
|
DONE = 1
|
|
|
|
async def run():
|
|
nonlocal DONE
|
|
g = gen()
|
|
await g.asend(None)
|
|
with self.assertRaises(StopAsyncIteration):
|
|
await g.asend(None)
|
|
DONE += 10
|
|
|
|
self.loop.run_until_complete(run())
|
|
self.assertEqual(DONE, 11)
|
|
|
|
def test_async_gen_asyncio_anext_tuple(self):
|
|
async def foo():
|
|
try:
|
|
yield (1,)
|
|
except ZeroDivisionError:
|
|
yield (2,)
|
|
|
|
async def run():
|
|
it = foo().__aiter__()
|
|
|
|
self.assertEqual(await it.__anext__(), (1,))
|
|
with self.assertRaises(StopIteration) as cm:
|
|
it.__anext__().throw(ZeroDivisionError)
|
|
self.assertEqual(cm.exception.args[0], (2,))
|
|
with self.assertRaises(StopAsyncIteration):
|
|
await it.__anext__()
|
|
|
|
self.loop.run_until_complete(run())
|
|
|
|
def test_async_gen_asyncio_anext_stopiteration(self):
|
|
async def foo():
|
|
try:
|
|
yield StopIteration(1)
|
|
except ZeroDivisionError:
|
|
yield StopIteration(3)
|
|
|
|
async def run():
|
|
it = foo().__aiter__()
|
|
|
|
v = await it.__anext__()
|
|
self.assertIsInstance(v, StopIteration)
|
|
self.assertEqual(v.value, 1)
|
|
with self.assertRaises(StopIteration) as cm:
|
|
it.__anext__().throw(ZeroDivisionError)
|
|
v = cm.exception.args[0]
|
|
self.assertIsInstance(v, StopIteration)
|
|
self.assertEqual(v.value, 3)
|
|
with self.assertRaises(StopAsyncIteration):
|
|
await it.__anext__()
|
|
|
|
self.loop.run_until_complete(run())
|
|
|
|
def test_async_gen_asyncio_aclose_06(self):
|
|
async def foo():
|
|
try:
|
|
yield 1
|
|
1 / 0
|
|
finally:
|
|
await asyncio.sleep(0.01)
|
|
yield 12
|
|
|
|
async def run():
|
|
gen = foo()
|
|
it = gen.__aiter__()
|
|
await it.__anext__()
|
|
await gen.aclose()
|
|
|
|
with self.assertRaisesRegex(
|
|
RuntimeError,
|
|
"async generator ignored GeneratorExit"):
|
|
self.loop.run_until_complete(run())
|
|
|
|
def test_async_gen_asyncio_aclose_07(self):
|
|
DONE = 0
|
|
|
|
async def foo():
|
|
nonlocal DONE
|
|
try:
|
|
yield 1
|
|
1 / 0
|
|
finally:
|
|
await asyncio.sleep(0.01)
|
|
await asyncio.sleep(0.01)
|
|
DONE += 1
|
|
DONE += 1000
|
|
|
|
async def run():
|
|
gen = foo()
|
|
it = gen.__aiter__()
|
|
await it.__anext__()
|
|
await gen.aclose()
|
|
|
|
self.loop.run_until_complete(run())
|
|
self.assertEqual(DONE, 1)
|
|
|
|
def test_async_gen_asyncio_aclose_08(self):
|
|
DONE = 0
|
|
|
|
fut = asyncio.Future(loop=self.loop)
|
|
|
|
async def foo():
|
|
nonlocal DONE
|
|
try:
|
|
yield 1
|
|
await fut
|
|
DONE += 1000
|
|
yield 2
|
|
finally:
|
|
await asyncio.sleep(0.01)
|
|
await asyncio.sleep(0.01)
|
|
DONE += 1
|
|
DONE += 1000
|
|
|
|
async def run():
|
|
gen = foo()
|
|
it = gen.__aiter__()
|
|
self.assertEqual(await it.__anext__(), 1)
|
|
await gen.aclose()
|
|
|
|
self.loop.run_until_complete(run())
|
|
self.assertEqual(DONE, 1)
|
|
|
|
# Silence ResourceWarnings
|
|
fut.cancel()
|
|
self.loop.run_until_complete(asyncio.sleep(0.01))
|
|
|
|
def test_async_gen_asyncio_gc_aclose_09(self):
|
|
DONE = 0
|
|
|
|
async def gen():
|
|
nonlocal DONE
|
|
try:
|
|
while True:
|
|
yield 1
|
|
finally:
|
|
await asyncio.sleep(0.01)
|
|
await asyncio.sleep(0.01)
|
|
DONE = 1
|
|
|
|
async def run():
|
|
g = gen()
|
|
await g.__anext__()
|
|
await g.__anext__()
|
|
del g
|
|
gc_collect() # For PyPy or other GCs.
|
|
|
|
await asyncio.sleep(0.1)
|
|
|
|
self.loop.run_until_complete(run())
|
|
self.assertEqual(DONE, 1)
|
|
|
|
def test_async_gen_asyncio_aclose_10(self):
|
|
DONE = 0
|
|
|
|
# test synchronous generators
|
|
def foo():
|
|
try:
|
|
yield
|
|
except:
|
|
pass
|
|
g = foo()
|
|
g.send(None)
|
|
g.close()
|
|
|
|
# now with asynchronous generators
|
|
|
|
async def gen():
|
|
nonlocal DONE
|
|
try:
|
|
yield
|
|
except:
|
|
pass
|
|
DONE = 1
|
|
|
|
async def run():
|
|
nonlocal DONE
|
|
g = gen()
|
|
await g.asend(None)
|
|
await g.aclose()
|
|
DONE += 10
|
|
|
|
self.loop.run_until_complete(run())
|
|
self.assertEqual(DONE, 11)
|
|
|
|
def test_async_gen_asyncio_aclose_11(self):
|
|
DONE = 0
|
|
|
|
# test synchronous generators
|
|
def foo():
|
|
try:
|
|
yield
|
|
except:
|
|
pass
|
|
yield
|
|
g = foo()
|
|
g.send(None)
|
|
with self.assertRaisesRegex(RuntimeError, 'ignored GeneratorExit'):
|
|
g.close()
|
|
|
|
# now with asynchronous generators
|
|
|
|
async def gen():
|
|
nonlocal DONE
|
|
try:
|
|
yield
|
|
except:
|
|
pass
|
|
yield
|
|
DONE += 1
|
|
|
|
async def run():
|
|
nonlocal DONE
|
|
g = gen()
|
|
await g.asend(None)
|
|
with self.assertRaisesRegex(RuntimeError, 'ignored GeneratorExit'):
|
|
await g.aclose()
|
|
DONE += 10
|
|
|
|
self.loop.run_until_complete(run())
|
|
self.assertEqual(DONE, 10)
|
|
|
|
def test_async_gen_asyncio_aclose_12(self):
|
|
DONE = 0
|
|
|
|
async def target():
|
|
await asyncio.sleep(0.01)
|
|
1 / 0
|
|
|
|
async def foo():
|
|
nonlocal DONE
|
|
task = asyncio.create_task(target())
|
|
try:
|
|
yield 1
|
|
finally:
|
|
try:
|
|
await task
|
|
except ZeroDivisionError:
|
|
DONE = 1
|
|
|
|
async def run():
|
|
gen = foo()
|
|
it = gen.__aiter__()
|
|
await it.__anext__()
|
|
await gen.aclose()
|
|
|
|
self.loop.run_until_complete(run())
|
|
self.assertEqual(DONE, 1)
|
|
|
|
def test_async_gen_asyncio_asend_01(self):
|
|
DONE = 0
|
|
|
|
# Sanity check:
|
|
def sgen():
|
|
v = yield 1
|
|
yield v * 2
|
|
sg = sgen()
|
|
v = sg.send(None)
|
|
self.assertEqual(v, 1)
|
|
v = sg.send(100)
|
|
self.assertEqual(v, 200)
|
|
|
|
async def gen():
|
|
nonlocal DONE
|
|
try:
|
|
await asyncio.sleep(0.01)
|
|
v = yield 1
|
|
await asyncio.sleep(0.01)
|
|
yield v * 2
|
|
await asyncio.sleep(0.01)
|
|
return
|
|
finally:
|
|
await asyncio.sleep(0.01)
|
|
await asyncio.sleep(0.01)
|
|
DONE = 1
|
|
|
|
async def run():
|
|
g = gen()
|
|
|
|
v = await g.asend(None)
|
|
self.assertEqual(v, 1)
|
|
|
|
v = await g.asend(100)
|
|
self.assertEqual(v, 200)
|
|
|
|
with self.assertRaises(StopAsyncIteration):
|
|
await g.asend(None)
|
|
|
|
self.loop.run_until_complete(run())
|
|
self.assertEqual(DONE, 1)
|
|
|
|
def test_async_gen_asyncio_asend_02(self):
|
|
DONE = 0
|
|
|
|
async def sleep_n_crash(delay):
|
|
await asyncio.sleep(delay)
|
|
1 / 0
|
|
|
|
async def gen():
|
|
nonlocal DONE
|
|
try:
|
|
await asyncio.sleep(0.01)
|
|
v = yield 1
|
|
await sleep_n_crash(0.01)
|
|
DONE += 1000
|
|
yield v * 2
|
|
finally:
|
|
await asyncio.sleep(0.01)
|
|
await asyncio.sleep(0.01)
|
|
DONE = 1
|
|
|
|
async def run():
|
|
g = gen()
|
|
|
|
v = await g.asend(None)
|
|
self.assertEqual(v, 1)
|
|
|
|
await g.asend(100)
|
|
|
|
with self.assertRaises(ZeroDivisionError):
|
|
self.loop.run_until_complete(run())
|
|
self.assertEqual(DONE, 1)
|
|
|
|
def test_async_gen_asyncio_asend_03(self):
|
|
DONE = 0
|
|
|
|
async def sleep_n_crash(delay):
|
|
fut = asyncio.ensure_future(asyncio.sleep(delay),
|
|
loop=self.loop)
|
|
self.loop.call_later(delay / 2, lambda: fut.cancel())
|
|
return await fut
|
|
|
|
async def gen():
|
|
nonlocal DONE
|
|
try:
|
|
await asyncio.sleep(0.01)
|
|
v = yield 1
|
|
await sleep_n_crash(0.01)
|
|
DONE += 1000
|
|
yield v * 2
|
|
finally:
|
|
await asyncio.sleep(0.01)
|
|
await asyncio.sleep(0.01)
|
|
DONE = 1
|
|
|
|
async def run():
|
|
g = gen()
|
|
|
|
v = await g.asend(None)
|
|
self.assertEqual(v, 1)
|
|
|
|
await g.asend(100)
|
|
|
|
with self.assertRaises(asyncio.CancelledError):
|
|
self.loop.run_until_complete(run())
|
|
self.assertEqual(DONE, 1)
|
|
|
|
def test_async_gen_asyncio_athrow_01(self):
|
|
DONE = 0
|
|
|
|
class FooEr(Exception):
|
|
pass
|
|
|
|
# Sanity check:
|
|
def sgen():
|
|
try:
|
|
v = yield 1
|
|
except FooEr:
|
|
v = 1000
|
|
yield v * 2
|
|
sg = sgen()
|
|
v = sg.send(None)
|
|
self.assertEqual(v, 1)
|
|
v = sg.throw(FooEr)
|
|
self.assertEqual(v, 2000)
|
|
with self.assertRaises(StopIteration):
|
|
sg.send(None)
|
|
|
|
async def gen():
|
|
nonlocal DONE
|
|
try:
|
|
await asyncio.sleep(0.01)
|
|
try:
|
|
v = yield 1
|
|
except FooEr:
|
|
v = 1000
|
|
await asyncio.sleep(0.01)
|
|
yield v * 2
|
|
await asyncio.sleep(0.01)
|
|
# return
|
|
finally:
|
|
await asyncio.sleep(0.01)
|
|
await asyncio.sleep(0.01)
|
|
DONE = 1
|
|
|
|
async def run():
|
|
g = gen()
|
|
|
|
v = await g.asend(None)
|
|
self.assertEqual(v, 1)
|
|
|
|
v = await g.athrow(FooEr)
|
|
self.assertEqual(v, 2000)
|
|
|
|
with self.assertRaises(StopAsyncIteration):
|
|
await g.asend(None)
|
|
|
|
self.loop.run_until_complete(run())
|
|
self.assertEqual(DONE, 1)
|
|
|
|
def test_async_gen_asyncio_athrow_02(self):
|
|
DONE = 0
|
|
|
|
class FooEr(Exception):
|
|
pass
|
|
|
|
async def sleep_n_crash(delay):
|
|
fut = asyncio.ensure_future(asyncio.sleep(delay),
|
|
loop=self.loop)
|
|
self.loop.call_later(delay / 2, lambda: fut.cancel())
|
|
return await fut
|
|
|
|
async def gen():
|
|
nonlocal DONE
|
|
try:
|
|
await asyncio.sleep(0.01)
|
|
try:
|
|
v = yield 1
|
|
except FooEr:
|
|
await sleep_n_crash(0.01)
|
|
yield v * 2
|
|
await asyncio.sleep(0.01)
|
|
# return
|
|
finally:
|
|
await asyncio.sleep(0.01)
|
|
await asyncio.sleep(0.01)
|
|
DONE = 1
|
|
|
|
async def run():
|
|
g = gen()
|
|
|
|
v = await g.asend(None)
|
|
self.assertEqual(v, 1)
|
|
|
|
try:
|
|
await g.athrow(FooEr)
|
|
except asyncio.CancelledError:
|
|
self.assertEqual(DONE, 1)
|
|
raise
|
|
else:
|
|
self.fail('CancelledError was not raised')
|
|
|
|
with self.assertRaises(asyncio.CancelledError):
|
|
self.loop.run_until_complete(run())
|
|
self.assertEqual(DONE, 1)
|
|
|
|
def test_async_gen_asyncio_athrow_03(self):
|
|
DONE = 0
|
|
|
|
# test synchronous generators
|
|
def foo():
|
|
try:
|
|
yield
|
|
except:
|
|
pass
|
|
g = foo()
|
|
g.send(None)
|
|
with self.assertRaises(StopIteration):
|
|
g.throw(ValueError)
|
|
|
|
# now with asynchronous generators
|
|
|
|
async def gen():
|
|
nonlocal DONE
|
|
try:
|
|
yield
|
|
except:
|
|
pass
|
|
DONE = 1
|
|
|
|
async def run():
|
|
nonlocal DONE
|
|
g = gen()
|
|
await g.asend(None)
|
|
with self.assertRaises(StopAsyncIteration):
|
|
await g.athrow(ValueError)
|
|
DONE += 10
|
|
|
|
self.loop.run_until_complete(run())
|
|
self.assertEqual(DONE, 11)
|
|
|
|
def test_async_gen_asyncio_athrow_tuple(self):
|
|
async def gen():
|
|
try:
|
|
yield 1
|
|
except ZeroDivisionError:
|
|
yield (2,)
|
|
|
|
async def run():
|
|
g = gen()
|
|
v = await g.asend(None)
|
|
self.assertEqual(v, 1)
|
|
v = await g.athrow(ZeroDivisionError)
|
|
self.assertEqual(v, (2,))
|
|
with self.assertRaises(StopAsyncIteration):
|
|
await g.asend(None)
|
|
|
|
self.loop.run_until_complete(run())
|
|
|
|
def test_async_gen_asyncio_athrow_stopiteration(self):
|
|
async def gen():
|
|
try:
|
|
yield 1
|
|
except ZeroDivisionError:
|
|
yield StopIteration(2)
|
|
|
|
async def run():
|
|
g = gen()
|
|
v = await g.asend(None)
|
|
self.assertEqual(v, 1)
|
|
v = await g.athrow(ZeroDivisionError)
|
|
self.assertIsInstance(v, StopIteration)
|
|
self.assertEqual(v.value, 2)
|
|
with self.assertRaises(StopAsyncIteration):
|
|
await g.asend(None)
|
|
|
|
self.loop.run_until_complete(run())
|
|
|
|
def test_async_gen_asyncio_shutdown_01(self):
|
|
finalized = 0
|
|
|
|
async def waiter(timeout):
|
|
nonlocal finalized
|
|
try:
|
|
await asyncio.sleep(timeout)
|
|
yield 1
|
|
finally:
|
|
await asyncio.sleep(0)
|
|
finalized += 1
|
|
|
|
async def wait():
|
|
async for _ in waiter(1):
|
|
pass
|
|
|
|
t1 = self.loop.create_task(wait())
|
|
t2 = self.loop.create_task(wait())
|
|
|
|
self.loop.run_until_complete(asyncio.sleep(0.1))
|
|
|
|
# Silence warnings
|
|
t1.cancel()
|
|
t2.cancel()
|
|
|
|
with self.assertRaises(asyncio.CancelledError):
|
|
self.loop.run_until_complete(t1)
|
|
with self.assertRaises(asyncio.CancelledError):
|
|
self.loop.run_until_complete(t2)
|
|
|
|
self.loop.run_until_complete(self.loop.shutdown_asyncgens())
|
|
|
|
self.assertEqual(finalized, 2)
|
|
|
|
def test_async_gen_asyncio_shutdown_02(self):
|
|
messages = []
|
|
|
|
def exception_handler(loop, context):
|
|
messages.append(context)
|
|
|
|
async def async_iterate():
|
|
yield 1
|
|
yield 2
|
|
|
|
it = async_iterate()
|
|
async def main():
|
|
loop = asyncio.get_running_loop()
|
|
loop.set_exception_handler(exception_handler)
|
|
|
|
async for i in it:
|
|
break
|
|
|
|
asyncio.run(main())
|
|
|
|
self.assertEqual(messages, [])
|
|
|
|
def test_async_gen_asyncio_shutdown_exception_01(self):
|
|
messages = []
|
|
|
|
def exception_handler(loop, context):
|
|
messages.append(context)
|
|
|
|
async def async_iterate():
|
|
try:
|
|
yield 1
|
|
yield 2
|
|
finally:
|
|
1/0
|
|
|
|
it = async_iterate()
|
|
async def main():
|
|
loop = asyncio.get_running_loop()
|
|
loop.set_exception_handler(exception_handler)
|
|
|
|
async for i in it:
|
|
break
|
|
|
|
asyncio.run(main())
|
|
|
|
message, = messages
|
|
self.assertEqual(message['asyncgen'], it)
|
|
self.assertIsInstance(message['exception'], ZeroDivisionError)
|
|
self.assertIn('an error occurred during closing of asynchronous generator',
|
|
message['message'])
|
|
|
|
def test_async_gen_asyncio_shutdown_exception_02(self):
|
|
messages = []
|
|
|
|
def exception_handler(loop, context):
|
|
messages.append(context)
|
|
|
|
async def async_iterate():
|
|
try:
|
|
yield 1
|
|
yield 2
|
|
finally:
|
|
1/0
|
|
|
|
async def main():
|
|
loop = asyncio.get_running_loop()
|
|
loop.set_exception_handler(exception_handler)
|
|
|
|
async for i in async_iterate():
|
|
break
|
|
gc_collect()
|
|
|
|
asyncio.run(main())
|
|
|
|
message, = messages
|
|
self.assertIsInstance(message['exception'], ZeroDivisionError)
|
|
self.assertIn('unhandled exception during asyncio.run() shutdown',
|
|
message['message'])
|
|
|
|
def test_async_gen_expression_01(self):
|
|
async def arange(n):
|
|
for i in range(n):
|
|
await asyncio.sleep(0.01)
|
|
yield i
|
|
|
|
def make_arange(n):
|
|
# This syntax is legal starting with Python 3.7
|
|
return (i * 2 async for i in arange(n))
|
|
|
|
async def run():
|
|
return [i async for i in make_arange(10)]
|
|
|
|
res = self.loop.run_until_complete(run())
|
|
self.assertEqual(res, [i * 2 for i in range(10)])
|
|
|
|
def test_async_gen_expression_02(self):
|
|
async def wrap(n):
|
|
await asyncio.sleep(0.01)
|
|
return n
|
|
|
|
def make_arange(n):
|
|
# This syntax is legal starting with Python 3.7
|
|
return (i * 2 for i in range(n) if await wrap(i))
|
|
|
|
async def run():
|
|
return [i async for i in make_arange(10)]
|
|
|
|
res = self.loop.run_until_complete(run())
|
|
self.assertEqual(res, [i * 2 for i in range(1, 10)])
|
|
|
|
def test_asyncgen_nonstarted_hooks_are_cancellable(self):
|
|
# See https://bugs.python.org/issue38013
|
|
messages = []
|
|
|
|
def exception_handler(loop, context):
|
|
messages.append(context)
|
|
|
|
async def async_iterate():
|
|
yield 1
|
|
yield 2
|
|
|
|
async def main():
|
|
loop = asyncio.get_running_loop()
|
|
loop.set_exception_handler(exception_handler)
|
|
|
|
async for i in async_iterate():
|
|
break
|
|
|
|
asyncio.run(main())
|
|
|
|
self.assertEqual([], messages)
|
|
|
|
def test_async_gen_await_same_anext_coro_twice(self):
|
|
async def async_iterate():
|
|
yield 1
|
|
yield 2
|
|
|
|
async def run():
|
|
it = async_iterate()
|
|
nxt = it.__anext__()
|
|
await nxt
|
|
with self.assertRaisesRegex(
|
|
RuntimeError,
|
|
r"cannot reuse already awaited __anext__\(\)/asend\(\)"
|
|
):
|
|
await nxt
|
|
|
|
await it.aclose() # prevent unfinished iterator warning
|
|
|
|
self.loop.run_until_complete(run())
|
|
|
|
def test_async_gen_await_same_aclose_coro_twice(self):
|
|
async def async_iterate():
|
|
yield 1
|
|
yield 2
|
|
|
|
async def run():
|
|
it = async_iterate()
|
|
nxt = it.aclose()
|
|
await nxt
|
|
with self.assertRaisesRegex(
|
|
RuntimeError,
|
|
r"cannot reuse already awaited aclose\(\)/athrow\(\)"
|
|
):
|
|
await nxt
|
|
|
|
self.loop.run_until_complete(run())
|
|
|
|
def test_async_gen_aclose_twice_with_different_coros(self):
|
|
# Regression test for https://bugs.python.org/issue39606
|
|
async def async_iterate():
|
|
yield 1
|
|
yield 2
|
|
|
|
async def run():
|
|
it = async_iterate()
|
|
await it.aclose()
|
|
await it.aclose()
|
|
|
|
self.loop.run_until_complete(run())
|
|
|
|
def test_async_gen_aclose_after_exhaustion(self):
|
|
# Regression test for https://bugs.python.org/issue39606
|
|
async def async_iterate():
|
|
yield 1
|
|
yield 2
|
|
|
|
async def run():
|
|
it = async_iterate()
|
|
async for _ in it:
|
|
pass
|
|
await it.aclose()
|
|
|
|
self.loop.run_until_complete(run())
|
|
|
|
def test_async_gen_aclose_compatible_with_get_stack(self):
|
|
async def async_generator():
|
|
yield object()
|
|
|
|
async def run():
|
|
ag = async_generator()
|
|
asyncio.create_task(ag.aclose())
|
|
tasks = asyncio.all_tasks()
|
|
for task in tasks:
|
|
# No AttributeError raised
|
|
task.get_stack()
|
|
|
|
self.loop.run_until_complete(run())
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|