[Python-checkins] bpo-33723: Fix test_time.test_thread_time() (GH-10724)

[Victor Stinner]

https://github.com/python/cpython/commit/65c216e74f7957006ef7653b7e2afe83007c45ce
commit: 65c216e74f7957006ef7653b7e2afe83007c45ce
branch: master
author: Victor Stinner <vstinner at redhat.com>
committer: GitHub <noreply at github.com>
date: 2018-11-26T21:19:29+01:00
summary:

bpo-33723: Fix test_time.test_thread_time() (GH-10724)

Tolerate up to 30 ms, instead of 15 min, in other threads.

files:
M Lib/test/test_time.py

diff --git a/Lib/test/test_time.py b/Lib/test/test_time.py
index 16b48a92f327..381cc823014e 100644
--- a/Lib/test/test_time.py
+++ b/Lib/test/test_time.py
@@ -496,7 +496,8 @@ def test_process_time(self):
         self.assertLess(stop - start, 0.020)
 
         # bpo-33723: A busy loop of 100 ms should increase process_time()
-        # by at least 15 ms
+        # by at least 15 ms. Tolerate 15 ms because of the bad resolution of
+        # the clock on Windows (around 15.6 ms).
         min_time = 0.015
         busy_time = 0.100
 
@@ -534,8 +535,11 @@ def test_thread_time(self):
         self.assertLess(stop - start, 0.020)
 
         # bpo-33723: A busy loop of 100 ms should increase thread_time()
-        # by at least 15 ms
+        # by at least 15 ms, but less than 30 ms in other threads.
+        # Tolerate 15 and 30 ms because of the bad resolution
+        # of the clock on Windows (around 15.6 ms).
         min_time = 0.015
+        max_time = 0.030
         busy_time = 0.100
 
         # thread_time() should include CPU time spent in current thread...
@@ -550,7 +554,7 @@ def test_thread_time(self):
         t.start()
         t.join()
         stop = time.thread_time()
-        self.assertLess(stop - start, min_time)
+        self.assertLess(stop - start, max_time)
 
         info = time.get_clock_info('thread_time')
         self.assertTrue(info.monotonic)