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3ddc796068
- our APIs require that methods return 'awaitables' - make sure that the older ways to create tornado 'yieldables' still produce 'awaitables'
91 lines
2.2 KiB
Python
91 lines
2.2 KiB
Python
"""Tests for utilities"""
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import asyncio
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import time
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from concurrent.futures import ThreadPoolExecutor
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import pytest
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from async_generator import aclosing
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from tornado import gen
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from tornado.concurrent import run_on_executor
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from ..utils import iterate_until
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async def yield_n(n, delay=0.01):
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"""Yield n items with a delay between each"""
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for i in range(n):
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if delay:
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await asyncio.sleep(delay)
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yield i
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def schedule_future(io_loop, *, delay, result=None):
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"""Construct a Future that will resolve after a delay"""
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f = asyncio.Future()
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if delay:
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io_loop.call_later(delay, lambda: f.set_result(result))
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else:
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f.set_result(result)
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return f
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@pytest.mark.parametrize(
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"deadline, n, delay, expected",
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[
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(0, 3, 1, []),
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(0, 3, 0, [0, 1, 2]),
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(5, 3, 0.01, [0, 1, 2]),
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(0.5, 10, 0.2, [0, 1]),
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],
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)
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async def test_iterate_until(io_loop, deadline, n, delay, expected):
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f = schedule_future(io_loop, delay=deadline)
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yielded = []
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async with aclosing(iterate_until(f, yield_n(n, delay=delay))) as items:
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async for item in items:
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yielded.append(item)
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assert yielded == expected
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async def test_iterate_until_ready_after_deadline(io_loop):
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f = schedule_future(io_loop, delay=0)
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async def gen():
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for i in range(5):
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yield i
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yielded = []
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async with aclosing(iterate_until(f, gen())) as items:
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async for item in items:
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yielded.append(item)
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assert yielded == list(range(5))
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@gen.coroutine
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def tornado_coroutine():
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yield gen.sleep(0.05)
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return "ok"
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class TornadoCompat:
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def __init__(self):
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self.executor = ThreadPoolExecutor(1)
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@run_on_executor
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def on_executor(self):
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time.sleep(0.05)
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return "executor"
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@gen.coroutine
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def tornado_coroutine(self):
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yield gen.sleep(0.05)
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return "gen.coroutine"
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async def test_tornado_coroutines():
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t = TornadoCompat()
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# verify that tornado gen and executor methods return awaitables
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assert (await t.on_executor()) == "executor"
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assert (await t.tornado_coroutine()) == "gen.coroutine"
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