Make test.support.temp_cwd() fork-safe. The context manager test.support.temp_cwd() no longer removes the temporary directory when executing in a process other than the parent it entered from.
If a forked child exits the context manager it won't do the cleanup..
(cherry picked from commit 33dddac00b)
Co-authored-by: Anselm Kruis <a.kruis@science-computing.de>
* bpo-31324: Optimize support._match_test() (#4421)
* Rename support._match_test() to support.match_test(): make it
public
* Remove support.match_tests global variable. It is replaced with a
new support.set_match_tests() function, so match_test() doesn't
have to check each time if patterns were modified.
* Rewrite match_test(): use different code paths depending on the
kind of patterns for best performances.
Co-Authored-By: Serhiy Storchaka <storchaka@gmail.com>
(cherry picked from commit 803ddd8ce2)
* bpo-31324: Fix test.support.set_match_tests(None) (#4505)
(cherry picked from commit bb11c3c967)
(cherry picked from commit 70b2f87971)
test_curses now saves/restores signals. On FreeBSD, the curses module
sets handlers of some signals, but don't restore old handlers when
the module is deinitialized.
(cherry picked from commit 19f68301a1)
bpo-31692, bpo-19527:
* Add a new PYTHONSHOWALLOCCOUNT environment variable, similar to
the Python 3 "-X showalloccount" option
* When Python is compiled with COUNT_ALLOCS, the new
PYTHONSHOWALLOCCOUNT environment variable now has to be set to dump
allocation counts into stderr on shutdown. Moreover, allocations
statistics are now dumped into stderr rather than stdout.
* Add @test.support.requires_type_collecting decorator: skip test if
COUNT_ALLOCS is defined
* Fix tests for COUNT_ALLOCS: decorate some methods with
@requires_type_collecting
* test_sys.test_objecttypes(): update object type when COUNT_ALLOCS
is defined
Add a new _testcapi._read_null() function to crash Python in a
reliable way on s390x.
On s390x, ctypes.string_at(0) returns an empty string rather than
crashing.
* bpo-30523: regrtest --list-cases --match (#2401)
* regrtest --list-cases now supports --match and --match-file options.
Example: ./python -m test --list-cases -m FileTests test_os
* --list-cases now also sets support.verbose to False to prevent
messages to stdout when loading test modules.
* Add support._match_test() private function.
(cherry picked from commit ace56d5836)
(cherry picked from commit 36946c06a3)
* bpo-30764: regrtest: add --fail-env-changed option (#2402)
* bpo-30764: regrtest: change exit code on failure
* Exit code 2 if failed tests ("bad")
* Exit code 3 if interrupted
* bpo-30764: regrtest: add --fail-env-changed option
If the option is set, mark a test as failed if it alters the
environment, for example if it creates a file without removing it.
(cherry picked from commit 63f54c6893)
(cherry picked from commit 1f33857a36)
* bpo-30776: reduce regrtest -R false positives (#2422)
* Change the regrtest --huntrleaks checker to decide if a test file
leaks or not. Require that each run leaks at least 1 reference.
* Warmup runs are now completely ignored: ignored in the checker test
and not used anymore to compute the sum.
* Add an unit test for a reference leak.
Example of reference differences previously considered a failure
(leak) and now considered as success (success, no leak):
[3, 0, 0]
[0, 1, 0]
[8, -8, 1]
(cherry picked from commit 48b5c422ff)
(cherry picked from commit e0f8b43a46)
* Add test.support._crash_python() which triggers a crash but uses
test.support.SuppressCrashReport() to prevent a crash report from
popping up.
* Modify test_child_terminated_in_stopped_state() of test_subprocess
and test_crashed() of test_regrtest to use _crash_python().
* Add Windows support to test.support.SuppressCrashReport: call
SetErrorMode() and CrtSetReportMode().
* _testcapi: add CrtSetReportMode() and CrtSetReportFile() functions
and CRT_xxx and CRTDBG_xxx constants needed by SuppressCrashReport.
* bpo-30764: Backport support.SuppressCrashReport
Backport test.support.SuppressCrashReport context-manager from
master. Drop the Windows implementation since it depends on
msvcrt.CrtSetReportMode() which isn't available on Python 2.7.
* bpo-30764: test_subprocess uses SuppressCrashReport (#2405)
bpo-30764, bpo-29335: test_child_terminated_in_stopped_state() of
test_subprocess now uses support.SuppressCrashReport() to prevent the
creation of a core dump on FreeBSD.
(cherry picked from commit cdee3f14f7)
Also backport new functions temp_dir() and python_is_optimized().
temp_cwd() now accepts None as a name (means using tempfile.mkdtemp).
check_syntax_error() now accepts arguments lineno and offset.
Use more specific error messages in get_attribute().
To simplify backports from Python 3, the test.test_support module
was converted into a package and renamed to test.support. The
test.script_helper module was moved into the test.support package.
Names test.test_support and test.script_helper are left as aliases to
test.support and test.support.script_helper.
Anselm Kruis
Serhiy Storchaka
Victor Stinner