* Rewrite code to serialize/deserialize worker arguments as JSON
  using a new WorkerJob class.
* Add TestResult.get_rerun_match_tests() method
* test_regrtest.test_rerun_success() now uses a marker file, since
  the test is re-run in a separated process.
* run_tests_worker() does also parses the JSON.
* If failed test names cannot be parsed, log a warning and don't
  filter tests.
* Add tests on normalize_test_name() function.

Rename --verbose2 option (-w) to --rerun. Keep --verbose2 as a
deprecated alias.

Changes:

* Add RunTests class.
* Add TestResult.get_rerun_match_tests() method
* Rewrite code to serialize/deserialize worker arguments as JSON
  using a new WorkerJob class.
* If failed test names cannot be parsed, log a warning and don't
  filter tests.
* test_regrtest.test_rerun_success() now uses a marker file, since
  the test is re-run in a separated process.
* Add tests on normalize_test_name() function.

Rename --verbose2 option (-w) to --rerun. Keep --verbose2 as a
deprecated alias.

Changes:

* Add RunTests class.
* Add TestResult.get_rerun_match_tests() method
* Rewrite code to serialize/deserialize worker arguments as JSON
  using a new WorkerJob class.
* Fix stats when a test is run with --forever --rerun.
* If failed test names cannot be parsed, log a warning and don't
  filter tests.
* test_regrtest.test_rerun_success() now uses a marker file, since
  the test is re-run in a separated process.
* Add tests on normalize_test_name() function.

Rename --verbose2 option (-w) to --rerun. Keep --verbose2 as a
deprecated alias.

Changes:

* Add RunTests class.
* Add TestResult.get_rerun_match_tests() method
* Rewrite code to serialize/deserialize worker arguments as JSON
  using a new WorkerJob class.
* Fix stats when a test is run with --forever --rerun.
* If failed test names cannot be parsed, log a warning and don't
  filter tests.
* test_regrtest.test_rerun_success() now uses a marker file, since
  the test is re-run in a separated process.
* Add tests on normalize_test_name() function.

Rename --verbose2 option (-w) to --rerun. Keep --verbose2 as a
deprecated alias.

Fix statistics in regrtest summary.

Changes:

* Add RunTests class.
* Add TestResult.get_rerun_match_tests() method
* Rewrite code to serialize/deserialize worker arguments as JSON
  using a new WorkerJob class.
* Fix stats when a test is run with --forever --rerun.
* If failed test names cannot be parsed, log a warning and don't
  filter tests.
* test_regrtest.test_rerun_success() now uses a marker file, since
  the test is re-run in a separated process.
* Add tests on normalize_test_name() function.

Rename --verbose2 option (-w) to --rerun. Keep --verbose2 as a
deprecated alias.

Changes:

* Fix and enhance statistics in regrtest summary. Add "(filtered)"
  when --match and/or --ignore options are used.
* Add RunTests class.
* Add TestResult.get_rerun_match_tests() method
* Rewrite code to serialize/deserialize worker arguments as JSON
  using a new WorkerJob class.
* Fix stats when a test is run with --forever --rerun.
* If failed test names cannot be parsed, log a warning and don't
  filter tests.
* test_regrtest.test_rerun_success() now uses a marker file, since
  the test is re-run in a separated process.
* Add tests on normalize_test_name() function.

When using --rerun option, regrtest now re-runs failed tests
in verbose mode in fresh worker processes to have more
deterministic behavior. So it can write its final report even
if a test killed a worker progress.

Add --fail-rerun option to regrtest: exit with non-zero exit code
if a test failed pass passed when re-run in verbose mode (in a
fresh process). That's now more useful since tests can pass
when re-run in a fresh worker progress, whereas they failed
when run after other tests when tests are run sequentially.

Rename --verbose2 option (-w) to --rerun. Keep --verbose2 as a
deprecated alias.

Changes:

* Fix and enhance statistics in regrtest summary. Add "(filtered)"
  when --match and/or --ignore options are used.
* Add RunTests class.
* Add TestResult.get_rerun_match_tests() method
* Rewrite code to serialize/deserialize worker arguments as JSON
  using a new WorkerJob class.
* Fix stats when a test is run with --forever --rerun.
* If failed test names cannot be parsed, log a warning and don't
  filter tests.
* test_regrtest.test_rerun_success() now uses a marker file, since
  the test is re-run in a separated process.
* Add tests on normalize_test_name() function.
* Add test_success() and test_skip() tests to test_regrtest.

Remove "global variables" from libregrtest: no longer pass 'ns' magic
namespace which was used to get and set 'random' attributes. Instead,
each class has its own attributes, and some classes are even
read-only (frozen dataclass), like RunTests.

Reorganize files:

* Rename runtest.py to single.py.
* Rename runtest_mp.py to mp_runner.py.
* Create findtests.py, result.py, results.py and worker.py.

Reorganize classes:

* Copy command line options ('ns' namespace) to Regrtest
  and RunTests attributes: add many attributes.
* Add Results class with methods: get_state(), display_result(),
  get_exitcode(), JUnit methods, etc.
* Add Logger class: log(), display_progress(), system load tracker.
* Remove WorkerJob class: the worker now gets a RunTests instance.

Move function and methods:

* Convert Regrtest.list_cases() to a function.
* Convert display_header(), display_sanitizers(), set_temp_dir() and
  create_temp_dir() methods of Regrtest to functions in utils.py.
  Rename set_temp_dir() to select_temp_dir(). Rename
  create_temp_dir() to make_temp_dir().
* Move abs_module_name() and normalize_test_name() to utils.py.

cmdline.py changes:

* Rename internal --worker-args command line option to --worker-json.
* Rename ns.trace to ns.coverage.
* No longer gets the number of CPUs: it's now done by Regrtest class.
* Add missing attributes to Namespace: coverage, threshold, wait.

Misc:

* Add test_parse_memlimit() and test_set_memlimit() to test_support.
* Add some type annotations.

When the --fail-rerun option is used a test failed and then passed,
regrtest now uses exit code 5 ("rerun) instead of 2 ("bad test").

When the --fail-rerun option is used and a test fails and then pass,
regrtest now uses exit code 5 ("rerun) instead of 2 ("bad test").

When the --fail-rerun option is used and a test fails and then pass,
regrtest now uses exit code 5 ("rerun) instead of 2 ("bad test").

Remove "global variables" from libregrtest: no longer pass 'ns' magic
namespace which was used to get and set 'random' attributes. Instead,
each class has its own attributes, and some classes are even
read-only (frozen dataclass), like RunTests.

Reorganize files:

* Rename runtest.py to single.py.
* Rename runtest_mp.py to mp_runner.py.
* Create findtests.py, result.py, results.py and worker.py.

Reorganize classes:

* Copy command line options ('ns' namespace) to Regrtest
  and RunTests attributes: add many attributes.
* Add Results class with methods: get_state(), display_result(),
  get_exitcode(), JUnit methods, etc.
* Add Logger class: log(), display_progress(), system load tracker.
* Remove WorkerJob class: the worker now gets a RunTests instance.

Move function and methods:

* Convert Regrtest.list_cases() to a function.
* Convert display_header(), display_sanitizers(), set_temp_dir() and
  create_temp_dir() methods of Regrtest to functions in utils.py.
  Rename set_temp_dir() to select_temp_dir(). Rename
  create_temp_dir() to make_temp_dir().
* Move abs_module_name() and normalize_test_name() to utils.py.
* Move capture_output() to utils.py.
* Rename dash_R() to runtest_refleak()
* Merge display_sanitizers() code into display_header().

cmdline.py changes:

* Rename internal --worker-args command line option to --worker-json.
* Rename ns.trace to ns.coverage.
* No longer gets the number of CPUs: it's now done by Regrtest class.
* Add missing attributes to Namespace: coverage, threshold, wait.

Misc:

* Add test_parse_memlimit() and test_set_memlimit() to test_support.
* Add some type annotations.

Remove "global variables" from libregrtest: no longer pass 'ns' magic
namespace which was used to get and set 'random' attributes. Instead,
each class has its own attributes, and some classes are even
read-only (frozen dataclass), like RunTests.

Reorganize files:

* Rename runtest.py to single.py.
* Rename runtest_mp.py to mp_runner.py.
* Create findtests.py, result.py, results.py and worker.py.

Reorganize classes:

* Copy command line options ('ns' namespace) to Regrtest
  and RunTests attributes: add many attributes.
* Add Results class with methods: get_state(), display_result(),
  get_exitcode(), JUnit methods, etc.
* Add Logger class: log(), display_progress(), system load tracker.
* Remove WorkerJob class: the worker now gets a RunTests instance.

Move function and methods:

* Convert Regrtest.list_cases() to a function.
* Convert display_header(), display_sanitizers(), set_temp_dir() and
  create_temp_dir() methods of Regrtest to functions in utils.py.
  Rename set_temp_dir() to select_temp_dir(). Rename
  create_temp_dir() to make_temp_dir().
* Move abs_module_name() and normalize_test_name() to utils.py.
* Move capture_output() to utils.py.
* Rename dash_R() to runtest_refleak()
* Merge display_sanitizers() code into display_header().

cmdline.py changes:

* Rename internal --worker-args command line option to --worker-json.
* Rename ns.trace to ns.coverage.
* No longer gets the number of CPUs: it's now done by Regrtest class.
* Add missing attributes to Namespace: coverage, threshold, wait.

Misc:

* Add test_parse_memlimit() and test_set_memlimit() to test_support.
* Add some type annotations.

…#108839)

When using --rerun option, regrtest now re-runs failed tests
in verbose mode in fresh worker processes to have more
deterministic behavior. So it can write its final report even
if a test killed a worker progress.

Add --fail-rerun option to regrtest: exit with non-zero exit code
if a test failed pass passed when re-run in verbose mode (in a
fresh process). That's now more useful since tests can pass
when re-run in a fresh worker progress, whereas they failed
when run after other tests when tests are run sequentially.

Rename --verbose2 option (-w) to --rerun. Keep --verbose2 as a
deprecated alias.

Changes:

* Fix and enhance statistics in regrtest summary. Add "(filtered)"
  when --match and/or --ignore options are used.
* Add RunTests class.
* Add TestResult.get_rerun_match_tests() method
* Rewrite code to serialize/deserialize worker arguments as JSON
  using a new WorkerJob class.
* Fix stats when a test is run with --forever --rerun.
* If failed test names cannot be parsed, log a warning and don't
  filter tests.
* test_regrtest.test_rerun_success() now uses a marker file, since
  the test is re-run in a separated process.
* Add tests on normalize_test_name() function.
* Add test_success() and test_skip() tests to test_regrtest.

(cherry picked from commit 31c2945)

When the --fail-rerun option is used and a test fails and then pass,
regrtest now uses exit code 5 ("rerun) instead of 2 ("bad test").

(cherry picked from commit 1170d5a)

Remove "global variables" from libregrtest: no longer pass 'ns' magic
namespace which was used to get and set 'random' attributes. Instead,
each class has its own attributes, and some classes are even
read-only (frozen dataclass), like RunTests.

Reorganize files:

* Rename runtest.py to single.py.
* Rename runtest_mp.py to mp_runner.py.
* Create findtests.py, result.py, results.py and worker.py.

Reorganize classes:

* Copy command line options ('ns' namespace) to Regrtest
  and RunTests attributes: add many attributes.
* Add Results class with methods: get_state(), display_result(),
  get_exitcode(), JUnit methods, etc.
* Add Logger class: log(), display_progress(), system load tracker.
* Remove WorkerJob class: the worker now gets a RunTests instance.

Move function and methods:

* Convert Regrtest.list_cases() to a function.
* Convert display_header(), display_sanitizers(), set_temp_dir() and
  create_temp_dir() methods of Regrtest to functions in utils.py.
  Rename set_temp_dir() to select_temp_dir(). Rename
  create_temp_dir() to make_temp_dir().
* Move abs_module_name() and normalize_test_name() to utils.py.
* Move capture_output() to utils.py.
* Rename dash_R() to runtest_refleak()
* Merge display_sanitizers() code into display_header().

cmdline.py changes:

* Rename internal --worker-args command line option to --worker-json.
* Rename ns.trace to ns.coverage.
* No longer gets the number of CPUs: it's now done by Regrtest class.
* Add missing attributes to Namespace: coverage, threshold, wait.

Misc:

* Add test_parse_memlimit() and test_set_memlimit() to test_support.
* Add some type annotations.

* gh-108834: regrtest reruns failed tests in subprocesses (#108839)

When using --rerun option, regrtest now re-runs failed tests
in verbose mode in fresh worker processes to have more
deterministic behavior. So it can write its final report even
if a test killed a worker progress.

Add --fail-rerun option to regrtest: exit with non-zero exit code
if a test failed pass passed when re-run in verbose mode (in a
fresh process). That's now more useful since tests can pass
when re-run in a fresh worker progress, whereas they failed
when run after other tests when tests are run sequentially.

Rename --verbose2 option (-w) to --rerun. Keep --verbose2 as a
deprecated alias.

Changes:

* Fix and enhance statistics in regrtest summary. Add "(filtered)"
  when --match and/or --ignore options are used.
* Add RunTests class.
* Add TestResult.get_rerun_match_tests() method
* Rewrite code to serialize/deserialize worker arguments as JSON
  using a new WorkerJob class.
* Fix stats when a test is run with --forever --rerun.
* If failed test names cannot be parsed, log a warning and don't
  filter tests.
* test_regrtest.test_rerun_success() now uses a marker file, since
  the test is re-run in a separated process.
* Add tests on normalize_test_name() function.
* Add test_success() and test_skip() tests to test_regrtest.

(cherry picked from commit 31c2945)

* gh-108834: regrtest --fail-rerun exits with code 5 (#108896)

When the --fail-rerun option is used and a test fails and then pass,
regrtest now uses exit code 5 ("rerun) instead of 2 ("bad test").

(cherry picked from commit 1170d5a)

* gh-108416: Mark slow but not CPU bound test methods with requires_resource('walltime') (GH-108480)

(cherry picked from commit 1e0d627)

* Manually sync Lib/test/libregrtest/ from main

---------

Co-authored-by: Serhiy Storchaka <[email protected]>

* main() now calls _parse_args() and pass 'ns' to Regrtest
  constructor.  Remove kwargs argument from Regrtest.main().
* _parse_args() checks ns.huntrleaks.
* set_temp_dir() is now responsible to call expanduser().
* Regrtest.main() sets self.tests earlier.
* Add TestsList type.

* main() now calls _parse_args() and pass 'ns' to Regrtest
  constructor.  Remove kwargs argument from Regrtest.main().
* _parse_args() checks ns.huntrleaks.
* set_temp_dir() is now responsible to call expanduser().
* Regrtest.main() sets self.tests earlier.
* Add TestTuple and TestList types.
* Rename MatchTests to MatchTestList and rename MatchTestsDict
  to MatchTestDict.
* RunTests.tests type becomes TestTuple.