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import asyncio
import unittest
import threading
import dataclasses
from pebble import ThreadPool
from pebble import asynchronous
def not_decorated(argument, keyword_argument=0):
return argument + keyword_argument
@asynchronous.thread
def decorated(argument, keyword_argument=0):
"""A docstring."""
return argument + keyword_argument
@asynchronous.thread
def error_decorated():
raise RuntimeError("BOOM!")
@asynchronous.thread
def error_returned():
return RuntimeError("BOOM!")
@dataclasses.dataclass(frozen=True)
class FrozenError(Exception):
pass
@asynchronous.thread()
def frozen_error_decorated():
raise FrozenError()
@asynchronous.thread()
def name_keyword_argument(name='function_kwarg'):
return name
@asynchronous.thread(name='asynchronous_thread_name')
def name_keyword_decorated():
return threading.current_thread().name
@asynchronous.thread(name='decorator_kwarg')
def name_keyword_decorated_and_argument(name='bar'):
return (threading.current_thread().name, name)
@asynchronous.thread(daemon=False)
def daemon_keyword_decorated():
return threading.current_thread().daemon
@asynchronous.thread(pool=ThreadPool(1))
def pool_decorated(_argument, _keyword_argument=0):
return threading.current_thread().ident
class ThreadAsynchronousObj:
a = 0
def __init__(self):
self.b = 1
@classmethod
@asynchronous.thread
def clsmethod(cls):
return cls.a
@asynchronous.thread
def instmethod(self):
return self.b
@staticmethod
@asynchronous.thread
def stcmethod():
return 2
class TestThreadAsynchronous(unittest.TestCase):
def setUp(self):
self.results = 0
self.exception = None
self.event = None
self.asynchronousobj = ThreadAsynchronousObj()
def callback(self, future):
try:
self.results = future.result()
except (RuntimeError) as error:
self.exception = error
finally:
self.event.set()
def test_docstring(self):
"""Thread docstring is preserved."""
self.assertEqual(decorated.__doc__, "A docstring.")
def test_class_method(self):
"""Thread decorated classmethods."""
async def test():
return await ThreadAsynchronousObj.clsmethod()
self.assertEqual(asyncio.run(test()), 0)
def test_instance_method(self):
"""Thread decorated instance methods."""
async def test():
return await self.asynchronousobj.instmethod()
self.assertEqual(asyncio.run(test()), 1)
def test_static_method(self):
"""Thread decorated static methods ( startmethod only)."""
async def test():
return await self.asynchronousobj.stcmethod()
self.assertEqual(asyncio.run(test()), 2)
def test_not_decorated_results(self):
"""Process Fork results are produced."""
non_decorated = asynchronous.thread(not_decorated)
async def test():
return await non_decorated(1, 1)
self.assertEqual(asyncio.run(test()), 2)
def test_decorated_results(self):
"""Thread results are produced."""
async def test():
return await decorated(1, 1)
self.assertEqual(asyncio.run(test()), 2)
def test_decorated_results_callback(self):
"""Thread results are forwarded to the callback."""
async def test():
self.event = asyncio.Event()
self.event.clear()
future = decorated(1, 1)
future.add_done_callback(self.callback)
await self.event.wait()
asyncio.run(test())
self.assertEqual(self.results, 2)
def test_error_decorated(self):
"""Thread errors are raised by future.result."""
async def test():
return await error_decorated()
with self.assertRaises(RuntimeError):
asyncio.run(test())
def test_error_returned(self):
"""Thread errors are raised by future.result."""
async def test():
return await error_returned()
self.assertIsInstance(asyncio.run(test()), RuntimeError)
def test_error_decorated_callback(self):
"""Thread errors are forwarded to callback."""
async def test():
self.event = asyncio.Event()
self.event.clear()
future = error_decorated()
future.add_done_callback(self.callback)
await self.event.wait()
asyncio.run(test())
self.assertTrue(isinstance(self.exception, RuntimeError),
msg=str(self.exception))
def test_frozen_error_decorated(self):
"""Thread frozen errors are raised by future.result."""
async def test():
return await frozen_error_decorated()
with self.assertRaises(FrozenError):
asyncio.run(test())
def test_name_keyword_argument(self):
"""name keyword can be passed to a decorated function process without name """
async def test():
return await name_keyword_argument()
self.assertEqual(asyncio.run(test()), "function_kwarg")
def test_name_keyword_decorated(self):
"""
Check that a simple use case of the name keyword passed to the decorator works
"""
async def test():
return await name_keyword_decorated()
self.assertEqual(asyncio.run(test()), "asynchronous_thread_name")
def test_name_keyword_decorated_result(self):
"""name kwarg is handled without modifying the function kwargs"""
async def test():
return await name_keyword_decorated_and_argument(
name="function_kwarg")
dec_out, fn_out = asyncio.run(test())
self.assertEqual(dec_out, "decorator_kwarg")
self.assertEqual(fn_out, "function_kwarg")
def test_daemon_keyword_decorated(self):
"""Daemon keyword can be passed to a decorated function and spawns correctly."""
async def test():
return await daemon_keyword_decorated()
self.assertEqual(asyncio.run(test()), False)
def test_pool_decorated(self):
"""Thread pool decorated function."""
async def test():
return await pool_decorated(1, 1)
self.assertEqual(asyncio.run(test()), asyncio.run(test()))
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