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gh-110367: Enhance regrtest -jN --verbose3 (#110368)

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When using worker processes (-jN) with --verbose3 option, regrtest
can now display the worker output even if a worker process does
crash.  Previously, sys.stdout and sys.stderr were replaced and so
the worker output was lost on a crash.
This commit is contained in:
Victor Stinner 2023-10-05 08:24:43 +02:00 • committed by GitHub
parent 313aa861ce
commit 6592976061
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4 changed files with 52 additions and 3 deletions
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34
Lib/test/test_regrtest.py
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@ -42,6 +42,8 @@ EXITCODE_NO_TESTS_RAN = 4
EXITCODE_RERUN_FAIL = 5
EXITCODE_INTERRUPTED = 130
MS_WINDOWS = (sys.platform == 'win32')
TEST_INTERRUPTED = textwrap.dedent("""
from signal import SIGINT, raise_signal
try:
@ -2036,6 +2038,38 @@ class ArgsTestCase(BaseTestCase):
with self.subTest(opt=opt):
self.check_add_python_opts(opt)
# gh-76319: Raising SIGSEGV on Android may not cause a crash.
@unittest.skipIf(support.is_android,
'raising SIGSEGV on Android is unreliable')
def test_worker_output_on_failure(self):
try:
from faulthandler import _sigsegv
except ImportError:
self.skipTest("need faulthandler._sigsegv")
code = textwrap.dedent(r"""
import faulthandler
import unittest
from test import support
class CrashTests(unittest.TestCase):
def test_crash(self):
print("just before crash!", flush=True)
with support.SuppressCrashReport():
faulthandler._sigsegv(True)
""")
testname = self.create_test(code=code)
output = self.run_tests("-j1", testname, exitcode=EXITCODE_BAD_TEST)
self.check_executed_tests(output, testname,
failed=[testname],
stats=0, parallel=True)
if not MS_WINDOWS:
exitcode = -int(signal.SIGSEGV)
self.assertIn(f"Exit code {exitcode} (SIGSEGV)", output)
self.check_line(output, "just before crash!", full=True, regex=False)
class TestUtils(unittest.TestCase):
def test_format_duration(self):