1213 lines
32 KiB
Python
1213 lines
32 KiB
Python
import inspect
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import types
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import unittest
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from test.support import import_module
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from test.support import gc_collect
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asyncio = import_module("asyncio")
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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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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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async def to_list(self, gen):
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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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def test_async_gen_asyncio_01(self):
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async def gen():
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yield 1
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await asyncio.sleep(0.01)
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yield 2
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await asyncio.sleep(0.01)
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return
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yield 3
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res = self.loop.run_until_complete(self.to_list(gen()))
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self.assertEqual(res, [1, 2])
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def test_async_gen_asyncio_02(self):
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async def gen():
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yield 1
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await asyncio.sleep(0.01)
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yield 2
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1 / 0
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yield 3
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with self.assertRaises(ZeroDivisionError):
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self.loop.run_until_complete(self.to_list(gen()))
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def test_async_gen_asyncio_03(self):
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loop = self.loop
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class Gen:
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async def __aiter__(self):
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yield 1
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await asyncio.sleep(0.01)
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yield 2
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res = loop.run_until_complete(self.to_list(Gen()))
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self.assertEqual(res, [1, 2])
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def test_async_gen_asyncio_anext_04(self):
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async def foo():
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yield 1
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await asyncio.sleep(0.01)
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try:
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yield 2
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yield 3
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except ZeroDivisionError:
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yield 1000
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await asyncio.sleep(0.01)
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yield 4
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async def run1():
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it = foo().__aiter__()
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self.assertEqual(await it.__anext__(), 1)
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self.assertEqual(await it.__anext__(), 2)
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self.assertEqual(await it.__anext__(), 3)
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self.assertEqual(await it.__anext__(), 4)
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with self.assertRaises(StopAsyncIteration):
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await it.__anext__()
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with self.assertRaises(StopAsyncIteration):
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await it.__anext__()
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async def run2():
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it = foo().__aiter__()
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self.assertEqual(await it.__anext__(), 1)
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self.assertEqual(await it.__anext__(), 2)
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try:
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it.__anext__().throw(ZeroDivisionError)
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except StopIteration as ex:
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self.assertEqual(ex.args[0], 1000)
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else:
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self.fail('StopIteration was not raised')
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self.assertEqual(await it.__anext__(), 4)
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with self.assertRaises(StopAsyncIteration):
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await it.__anext__()
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self.loop.run_until_complete(run1())
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self.loop.run_until_complete(run2())
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def test_async_gen_asyncio_anext_05(self):
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async def foo():
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v = yield 1
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v = yield v
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yield v * 100
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async def run():
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it = foo().__aiter__()
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try:
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it.__anext__().send(None)
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except StopIteration as ex:
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self.assertEqual(ex.args[0], 1)
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else:
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self.fail('StopIteration was not raised')
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try:
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it.__anext__().send(10)
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except StopIteration as ex:
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self.assertEqual(ex.args[0], 10)
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else:
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self.fail('StopIteration was not raised')
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try:
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it.__anext__().send(12)
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except StopIteration as ex:
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self.assertEqual(ex.args[0], 1200)
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else:
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self.fail('StopIteration was not raised')
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|
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with self.assertRaises(StopAsyncIteration):
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await it.__anext__()
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|
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self.loop.run_until_complete(run())
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|
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def test_async_gen_asyncio_anext_06(self):
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DONE = 0
|
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|
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# test synchronous generators
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def foo():
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try:
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yield
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except:
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pass
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g = foo()
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g.send(None)
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with self.assertRaises(StopIteration):
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g.send(None)
|
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|
|
# now with asynchronous generators
|
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|
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async def gen():
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nonlocal DONE
|
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try:
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yield
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except:
|
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pass
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DONE = 1
|
|
|
|
async def run():
|
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nonlocal DONE
|
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g = gen()
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await g.asend(None)
|
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with self.assertRaises(StopAsyncIteration):
|
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await g.asend(None)
|
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DONE += 10
|
|
|
|
self.loop.run_until_complete(run())
|
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self.assertEqual(DONE, 11)
|
|
|
|
def test_async_gen_asyncio_anext_tuple(self):
|
|
async def foo():
|
|
try:
|
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yield (1,)
|
|
except ZeroDivisionError:
|
|
yield (2,)
|
|
|
|
async def run():
|
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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_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()
|