diff --git a/Lib/test/test_asyncio/test_base_events.py b/Lib/test/test_asyncio/test_base_events.py
index 6ba602dd619fba..f3f83ad318c954 100644
--- a/Lib/test/test_asyncio/test_base_events.py
+++ b/Lib/test/test_asyncio/test_base_events.py
@@ -273,7 +273,7 @@ def cb():
self.loop.stop()
self.loop._process_events = mock.Mock()
- delay = 0.1
+ delay = 0.100
when = self.loop.time() + delay
self.loop.call_at(when, cb)
@@ -282,10 +282,7 @@ def cb():
dt = self.loop.time() - t0
# 50 ms: maximum granularity of the event loop
- self.assertGreaterEqual(dt, delay - 0.050, dt)
- # tolerate a difference of +800 ms because some Python buildbots
- # are really slow
- self.assertLessEqual(dt, 0.9, dt)
+ self.assertGreaterEqual(dt, delay - test_utils.CLOCK_RES)
with self.assertRaises(TypeError, msg="when cannot be None"):
self.loop.call_at(None, cb)
diff --git a/Lib/test/test_asyncio/test_events.py b/Lib/test/test_asyncio/test_events.py
index 4e0321a87daeca..daf2fb87994a84 100644
--- a/Lib/test/test_asyncio/test_events.py
+++ b/Lib/test/test_asyncio/test_events.py
@@ -294,10 +294,11 @@ async def coro2():
# 15.6 msec, we use fairly long sleep times here (~100 msec).
def test_run_until_complete(self):
+ delay = 0.100
t0 = self.loop.time()
- self.loop.run_until_complete(asyncio.sleep(0.1))
- t1 = self.loop.time()
- self.assertTrue(0.08 <= t1-t0 <= 0.8, t1-t0)
+ self.loop.run_until_complete(asyncio.sleep(delay))
+ dt = self.loop.time() - t0
+ self.assertGreaterEqual(dt, delay - test_utils.CLOCK_RES)
def test_run_until_complete_stopped(self):
@@ -1695,7 +1696,6 @@ def _run_once():
self.loop._run_once = _run_once
async def wait():
- loop = self.loop
await asyncio.sleep(1e-2)
await asyncio.sleep(1e-4)
await asyncio.sleep(1e-6)
diff --git a/Lib/test/test_asyncio/test_timeouts.py b/Lib/test/test_asyncio/test_timeouts.py
index cc8feb8d0c1afb..5a4093e94707bc 100644
--- a/Lib/test/test_asyncio/test_timeouts.py
+++ b/Lib/test/test_asyncio/test_timeouts.py
@@ -47,7 +47,6 @@ async def test_nested_timeouts(self):
self.assertTrue(cm2.expired())
async def test_waiter_cancelled(self):
- loop = asyncio.get_running_loop()
cancelled = False
with self.assertRaises(TimeoutError):
async with asyncio.timeout(0.01):
@@ -60,39 +59,26 @@ async def test_waiter_cancelled(self):
async def test_timeout_not_called(self):
loop = asyncio.get_running_loop()
- t0 = loop.time()
async with asyncio.timeout(10) as cm:
await asyncio.sleep(0.01)
t1 = loop.time()
self.assertFalse(cm.expired())
- # 2 sec for slow CI boxes
- self.assertLess(t1-t0, 2)
self.assertGreater(cm.when(), t1)
async def test_timeout_disabled(self):
- loop = asyncio.get_running_loop()
- t0 = loop.time()
async with asyncio.timeout(None) as cm:
await asyncio.sleep(0.01)
- t1 = loop.time()
self.assertFalse(cm.expired())
self.assertIsNone(cm.when())
- # 2 sec for slow CI boxes
- self.assertLess(t1-t0, 2)
async def test_timeout_at_disabled(self):
- loop = asyncio.get_running_loop()
- t0 = loop.time()
async with asyncio.timeout_at(None) as cm:
await asyncio.sleep(0.01)
- t1 = loop.time()
self.assertFalse(cm.expired())
self.assertIsNone(cm.when())
- # 2 sec for slow CI boxes
- self.assertLess(t1-t0, 2)
async def test_timeout_zero(self):
loop = asyncio.get_running_loop()
@@ -102,8 +88,6 @@ async def test_timeout_zero(self):
await asyncio.sleep(10)
t1 = loop.time()
self.assertTrue(cm.expired())
- # 2 sec for slow CI boxes
- self.assertLess(t1-t0, 2)
self.assertTrue(t0 <= cm.when() <= t1)
async def test_timeout_zero_sleep_zero(self):
@@ -114,8 +98,6 @@ async def test_timeout_zero_sleep_zero(self):
await asyncio.sleep(0)
t1 = loop.time()
self.assertTrue(cm.expired())
- # 2 sec for slow CI boxes
- self.assertLess(t1-t0, 2)
self.assertTrue(t0 <= cm.when() <= t1)
async def test_timeout_in_the_past_sleep_zero(self):
@@ -126,8 +108,6 @@ async def test_timeout_in_the_past_sleep_zero(self):
await asyncio.sleep(0)
t1 = loop.time()
self.assertTrue(cm.expired())
- # 2 sec for slow CI boxes
- self.assertLess(t1-t0, 2)
self.assertTrue(t0 >= cm.when() <= t1)
async def test_foreign_exception_passed(self):
diff --git a/Lib/test/test_asyncio/test_waitfor.py b/Lib/test/test_asyncio/test_waitfor.py
index 07dbab3b39ca2b..c0cc606825b5e1 100644
--- a/Lib/test/test_asyncio/test_waitfor.py
+++ b/Lib/test/test_asyncio/test_waitfor.py
@@ -66,17 +66,12 @@ async def test_wait_for_timeout_less_then_0_or_0_future_done(self):
fut = loop.create_future()
fut.set_result('done')
- t0 = loop.time()
ret = await asyncio.wait_for(fut, 0)
- t1 = loop.time()
self.assertEqual(ret, 'done')
self.assertTrue(fut.done())
- self.assertLess(t1 - t0, 0.1)
async def test_wait_for_timeout_less_then_0_or_0_coroutine_do_not_started(self):
- loop = asyncio.get_running_loop()
-
foo_started = False
async def foo():
@@ -84,12 +79,9 @@ async def foo():
foo_started = True
with self.assertRaises(asyncio.TimeoutError):
- t0 = loop.time()
await asyncio.wait_for(foo(), 0)
- t1 = loop.time()
self.assertEqual(foo_started, False)
- self.assertLess(t1 - t0, 0.1)
async def test_wait_for_timeout_less_then_0_or_0(self):
loop = asyncio.get_running_loop()
@@ -113,18 +105,14 @@ async def foo():
await started
with self.assertRaises(asyncio.TimeoutError):
- t0 = loop.time()
await asyncio.wait_for(fut, timeout)
- t1 = loop.time()
self.assertTrue(fut.done())
# it should have been cancelled due to the timeout
self.assertTrue(fut.cancelled())
self.assertEqual(foo_running, False)
- self.assertLess(t1 - t0, 0.1)
async def test_wait_for(self):
- loop = asyncio.get_running_loop()
foo_running = None
async def foo():
@@ -139,13 +127,10 @@ async def foo():
fut = asyncio.create_task(foo())
with self.assertRaises(asyncio.TimeoutError):
- t0 = loop.time()
await asyncio.wait_for(fut, 0.1)
- t1 = loop.time()
self.assertTrue(fut.done())
# it should have been cancelled due to the timeout
self.assertTrue(fut.cancelled())
- self.assertLess(t1 - t0, support.SHORT_TIMEOUT)
self.assertEqual(foo_running, False)
async def test_wait_for_blocking(self):
diff --git a/Lib/test/test_asyncio/test_windows_events.py b/Lib/test/test_asyncio/test_windows_events.py
index a36119a8004f9d..6e6c90a247b291 100644
--- a/Lib/test/test_asyncio/test_windows_events.py
+++ b/Lib/test/test_asyncio/test_windows_events.py
@@ -163,29 +163,25 @@ def test_wait_for_handle(self):
# Wait for unset event with 0.5s timeout;
# result should be False at timeout
- fut = self.loop._proactor.wait_for_handle(event, 0.5)
+ timeout = 0.5
+ fut = self.loop._proactor.wait_for_handle(event, timeout)
start = self.loop.time()
done = self.loop.run_until_complete(fut)
elapsed = self.loop.time() - start
self.assertEqual(done, False)
self.assertFalse(fut.result())
- # bpo-31008: Tolerate only 450 ms (at least 500 ms expected),
- # because of bad clock resolution on Windows
- self.assertTrue(0.45 <= elapsed <= 0.9, elapsed)
+ self.assertGreaterEqual(elapsed, timeout - test_utils.CLOCK_RES)
_overlapped.SetEvent(event)
# Wait for set event;
# result should be True immediately
fut = self.loop._proactor.wait_for_handle(event, 10)
- start = self.loop.time()
done = self.loop.run_until_complete(fut)
- elapsed = self.loop.time() - start
self.assertEqual(done, True)
self.assertTrue(fut.result())
- self.assertTrue(0 <= elapsed < 0.3, elapsed)
# asyncio issue #195: cancelling a done _WaitHandleFuture
# must not crash
@@ -199,11 +195,8 @@ def test_wait_for_handle_cancel(self):
# CancelledError should be raised immediately
fut = self.loop._proactor.wait_for_handle(event, 10)
fut.cancel()
- start = self.loop.time()
with self.assertRaises(asyncio.CancelledError):
self.loop.run_until_complete(fut)
- elapsed = self.loop.time() - start
- self.assertTrue(0 <= elapsed < 0.1, elapsed)
# asyncio issue #195: cancelling a _WaitHandleFuture twice
# must not crash
diff --git a/Lib/test/test_asyncio/utils.py b/Lib/test/test_asyncio/utils.py
index c32494d40ccea8..19de8540fdb546 100644
--- a/Lib/test/test_asyncio/utils.py
+++ b/Lib/test/test_asyncio/utils.py
@@ -37,6 +37,12 @@
from test.support import threading_helper
+# Use the maximum known clock resolution (gh-75191, gh-110088): Windows
+# GetTickCount64() has a resolution of 15.6 ms. Use 20 ms to tolerate rounding
+# issues.
+CLOCK_RES = 0.020
+
+
def data_file(filename):
if hasattr(support, 'TEST_HOME_DIR'):
fullname = os.path.join(support.TEST_HOME_DIR, filename)
diff --git a/Misc/NEWS.d/next/Tests/2023-09-29-12-48-42.gh-issue-110088.qUhRga.rst b/Misc/NEWS.d/next/Tests/2023-09-29-12-48-42.gh-issue-110088.qUhRga.rst
new file mode 100644
index 00000000000000..cf44a123c2c925
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2023-09-29-12-48-42.gh-issue-110088.qUhRga.rst
@@ -0,0 +1,4 @@
+Fix test_asyncio timeouts: don't measure the maximum duration, a test should
+not measure a CI performance. Only measure the minimum duration when a task has
+a timeout or delay. Add ``CLOCK_RES`` to ``test_asyncio.utils``. Patch by
+Victor Stinner.
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