[Python-checkins] bpo-45410: Add test.support.flush_std_streams() (GH-28885)
vstinner
webhook-mailer at python.org
Mon Oct 11 17:07:29 EDT 2021
https://github.com/python/cpython/commit/1ebd798fddef51e1f6fd40a4860278a1851ac268
commit: 1ebd798fddef51e1f6fd40a4860278a1851ac268
branch: main
author: Victor Stinner <vstinner at python.org>
committer: vstinner <vstinner at python.org>
date: 2021-10-11T23:07:21+02:00
summary:
bpo-45410: Add test.support.flush_std_streams() (GH-28885)
support.print_warning() now flushs sys.stdout.
files:
M Doc/library/test.rst
M Lib/test/libregrtest/utils.py
M Lib/test/support/__init__.py
diff --git a/Doc/library/test.rst b/Doc/library/test.rst
index a8dc35476fc9b..699db14596f25 100644
--- a/Doc/library/test.rst
+++ b/Doc/library/test.rst
@@ -607,6 +607,15 @@ The :mod:`test.support` module defines the following functions:
target of the "as" clause, if there is one.
+.. function:: flush_std_streams()
+
+ Call the ``flush()`` method on :data:`sys.stdout` and then on
+ :data:`sys.stderr`. It can be used to make sure that the logs order is
+ consistent before writing into stderr.
+
+ .. versionadded:: 3.11
+
+
.. function:: print_warning(msg)
Print a warning into :data:`sys.__stderr__`. Format the message as:
diff --git a/Lib/test/libregrtest/utils.py b/Lib/test/libregrtest/utils.py
index ad18b50f5db99..c71467a51921d 100644
--- a/Lib/test/libregrtest/utils.py
+++ b/Lib/test/libregrtest/utils.py
@@ -68,20 +68,13 @@ def print_warning(msg):
orig_unraisablehook = None
-def flush_std_streams():
- if sys.stdout is not None:
- sys.stdout.flush()
- if sys.stderr is not None:
- sys.stderr.flush()
-
-
def regrtest_unraisable_hook(unraisable):
global orig_unraisablehook
support.environment_altered = True
print_warning("Unraisable exception")
old_stderr = sys.stderr
try:
- flush_std_streams()
+ support.flush_std_streams()
sys.stderr = sys.__stderr__
orig_unraisablehook(unraisable)
sys.stderr.flush()
@@ -104,7 +97,7 @@ def regrtest_threading_excepthook(args):
print_warning(f"Uncaught thread exception: {args.exc_type.__name__}")
old_stderr = sys.stderr
try:
- flush_std_streams()
+ support.flush_std_streams()
sys.stderr = sys.__stderr__
orig_threading_excepthook(args)
sys.stderr.flush()
diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
index b29f438e52cf8..0bbe813775ce5 100644
--- a/Lib/test/support/__init__.py
+++ b/Lib/test/support/__init__.py
@@ -1167,7 +1167,16 @@ def run_doctest(module, verbosity=None, optionflags=0):
#=======================================================================
# Support for saving and restoring the imported modules.
+def flush_std_streams():
+ if sys.stdout is not None:
+ sys.stdout.flush()
+ if sys.stderr is not None:
+ sys.stderr.flush()
+
+
def print_warning(msg):
+ # bpo-45410: Explicitly flush stdout to keep logs in order
+ flush_std_streams()
# bpo-39983: Print into sys.__stderr__ to display the warning even
# when sys.stderr is captured temporarily by a test
for line in msg.splitlines():
More information about the Python-checkins
mailing list