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✏️ test_regrtest.py

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"""
Tests of regrtest.py.

Note: test_regrtest cannot be run twice in parallel.
"""
from __future__ import print_function

import collections
import errno
import os.path
import platform
import re
import subprocess
import sys
import sysconfig
import tempfile
import textwrap
import unittest
from test import support
# Use utils alias to use the same code for TestUtils in master and 2.7 branches
import regrtest as utils

Py_DEBUG = hasattr(sys, 'getobjects')
ROOT_DIR = os.path.join(os.path.dirname(__file__), '..', '..')
ROOT_DIR = os.path.abspath(os.path.normpath(ROOT_DIR))

TEST_INTERRUPTED = textwrap.dedent("""
    from signal import SIGINT
    try:
        from _testcapi import raise_signal
        raise_signal(SIGINT)
    except ImportError:
        import os
        os.kill(os.getpid(), SIGINT)
    """)

SubprocessRun = collections.namedtuple('SubprocessRun',
                                       'returncode stdout stderr')

class BaseTestCase(unittest.TestCase):
    TEST_UNIQUE_ID = 1
    TESTNAME_PREFIX = 'test_regrtest_'
    TESTNAME_REGEX = r'test_[a-zA-Z0-9_]+'

def setUp(self):
        self.testdir = os.path.realpath(os.path.dirname(__file__))

self.tmptestdir = tempfile.mkdtemp()
        self.addCleanup(support.rmtree, self.tmptestdir)

def create_test(self, name=None, code=None):
        if not name:
            name = 'noop%s' % BaseTestCase.TEST_UNIQUE_ID
            BaseTestCase.TEST_UNIQUE_ID += 1

if code is None:
            code = textwrap.dedent("""
                    import unittest
                    from test import support

class Tests(unittest.TestCase):
                        def test_empty_test(self):
                            pass

def test_main():
                        support.run_unittest(Tests)
                """)

# test_regrtest cannot be run twice in parallel because
        # of setUp() and create_test()
        name = self.TESTNAME_PREFIX + name
        path = os.path.join(self.tmptestdir, name + '.py')

self.addCleanup(support.unlink, path)
        # Use O_EXCL to ensure that we do not override existing tests
        try:
            fd = os.open(path, os.O_WRONLY | os.O_CREAT | os.O_EXCL)
        except OSError as exc:
            if (exc.errno in (errno.EACCES, errno.EPERM)
               and not sysconfig.is_python_build()):
                self.skipTest("cannot write %s: %s" % (path, exc))
            else:
                raise
        else:
            with os.fdopen(fd, 'w') as fp:
                fp.write(code)
        return name

def regex_search(self, regex, output):
        match = re.search(regex, output, re.MULTILINE)
        if not match:
            self.fail("%r not found in %r" % (regex, output))
        return match

def check_line(self, output, regex):
        regex = re.compile(r'^' + regex, re.MULTILINE)
        self.assertRegexpMatches(output, regex)

def parse_executed_tests(self, output):
        regex = (r'^[0-9]+:[0-9]+:[0-9]+ (?:load avg: [0-9]+\.[0-9]{2} )?\[ *[0-9]+(?:/ *[0-9]+)*\] (%s)'
                 % self.TESTNAME_REGEX)
        parser = re.finditer(regex, output, re.MULTILINE)
        return list(match.group(1) for match in parser)

def check_executed_tests(self, output, tests, skipped=(), failed=(),
                             env_changed=(), omitted=(),
                             rerun=(), no_test_ran=(),
                             randomize=False, interrupted=False,
                             fail_env_changed=False):
        if isinstance(tests, str):
            tests = [tests]
        if isinstance(skipped, str):
            skipped = [skipped]
        if isinstance(failed, str):
            failed = [failed]
        if isinstance(env_changed, str):
            env_changed = [env_changed]
        if isinstance(omitted, str):
            omitted = [omitted]
        if isinstance(rerun, str):
            rerun = [rerun]
        if isinstance(no_test_ran, str):
            no_test_ran = [no_test_ran]

executed = self.parse_executed_tests(output)
        if randomize:
            self.assertEqual(set(executed), set(tests), output)
        else:
            self.assertEqual(executed, tests, (executed, tests, output))

def plural(count):
            return 's' if count != 1 else ''

def list_regex(line_format, tests):
            count = len(tests)
            names = ' '.join(sorted(tests))
            regex = line_format % (count, plural(count))
            regex = r'%s:\n    %s$' % (regex, names)
            return regex

if skipped:
            regex = list_regex('%s test%s skipped', skipped)
            self.check_line(output, regex)

if failed:
            regex = list_regex('%s test%s failed', failed)
            self.check_line(output, regex)

if env_changed:
            regex = list_regex('%s test%s altered the execution environment',
                               env_changed)
            self.check_line(output, regex)

if omitted:
            regex = list_regex('%s test%s omitted', omitted)
            self.check_line(output, regex)

if rerun:
            regex = list_regex('%s re-run test%s', rerun)
            self.check_line(output, regex)
            self.check_line(output, "Re-running failed tests in verbose mode")
            for name in rerun:
                regex = "Re-running test %r in verbose mode" % name
                self.check_line(output, regex)

good = (len(tests) - len(skipped) - len(failed)
                - len(omitted) - len(env_changed) - len(no_test_ran))
        if good:
            regex = r'%s test%s OK\.$' % (good, plural(good))
            if not skipped and not failed and good > 1:
                regex = 'All %s' % regex
            self.check_line(output, regex)

if interrupted:
            self.check_line(output, 'Test suite interrupted by signal SIGINT.')

result = []
        if failed:
            result.append('FAILURE')
        elif fail_env_changed and env_changed:
            result.append('ENV CHANGED')
        if interrupted:
            result.append('INTERRUPTED')
        if not any((good, result, failed, interrupted, skipped,
                    env_changed, fail_env_changed)):
            result.append("NO TEST RUN")
        elif not result:
            result.append('SUCCESS')
        result = ', '.join(result)
        if rerun:
            self.check_line(output, 'Tests result: %s' % result)
            result = 'FAILURE then %s' % result

self.check_line(output, 'Tests result: %s' % result)

def parse_random_seed(self, output):
        match = self.regex_search(r'Using random seed ([0-9]+)', output)
        randseed = int(match.group(1))
        self.assertTrue(0 <= randseed <= 10000000, randseed)
        return randseed

def run_command(self, args, input=None, exitcode=0, **kw):
        if not input:
            input = ''
        if 'stderr' not in kw:
            kw['stderr'] = subprocess.PIPE
        proc = subprocess.Popen(args,
                                universal_newlines=True,
                                stdout=subprocess.PIPE,
                                **kw)
        stdout, stderr = proc.communicate(input=input)
        if proc.returncode != exitcode:
            msg = ("Command %s failed with exit code %s\n"
                   "\n"
                   "stdout:\n"
                   "---\n"
                   "%s\n"
                   "---\n"
                   % (str(args), proc.returncode, stdout))
            if proc.stderr:
                msg += ("\n"
                        "stderr:\n"
                        "---\n"
                        "%s"
                        "---\n"
                        % stderr)
            self.fail(msg)
        return SubprocessRun(proc.returncode, stdout, stderr)

def run_python(self, args, **kw):
        args = [sys.executable] + list(args)
        proc = self.run_command(args, **kw)
        return proc.stdout

class ProgramsTestCase(BaseTestCase):
    """
    Test various ways to run the Python test suite. Use options close
    to options used on the buildbot.
    """

NTEST = 4

def setUp(self):
        super(ProgramsTestCase, self).setUp()

# Create NTEST tests doing nothing
        self.tests = [self.create_test() for index in range(self.NTEST)]

self.python_args = ['-Wd', '-3', '-E', '-bb', '-tt']
        self.regrtest_args = ['-uall', '-rwW',
                              '--testdir=%s' % self.tmptestdir]

def check_output(self, output):
        self.parse_random_seed(output)
        self.check_executed_tests(output, self.tests, randomize=True)

def run_tests(self, args):
        output = self.run_python(args)
        self.check_output(output)

def test_script_regrtest(self):
        # Lib/test/regrtest.py
        script = os.path.join(self.testdir, 'regrtest.py')

args = self.python_args + [script] + self.regrtest_args + self.tests
        self.run_tests(args)

def test_module_test(self):
        # -m test
        args = self.python_args + ['-m', 'test'] + self.regrtest_args + self.tests
        self.run_tests(args)

def test_module_regrtest(self):
        # -m test.regrtest
        args = self.python_args + ['-m', 'test.regrtest'] + self.regrtest_args + self.tests
        self.run_tests(args)

def test_module_autotest(self):
        # -m test.autotest
        args = self.python_args + ['-m', 'test.autotest'] + self.regrtest_args + self.tests
        self.run_tests(args)

def test_module_from_test_autotest(self):
        # from test import autotest
        code = 'from test import autotest'
        args = self.python_args + ['-c', code] + self.regrtest_args + self.tests
        self.run_tests(args)

def test_script_autotest(self):
        # Lib/test/autotest.py
        script = os.path.join(self.testdir, 'autotest.py')
        args = self.python_args + [script] + self.regrtest_args + self.tests
        self.run_tests(args)

def run_batch(self, *args):
        proc = self.run_command(args)
        self.check_output(proc.stdout)

def need_pcbuild(self):
        exe = os.path.normpath(os.path.abspath(sys.executable))
        parts = exe.split(os.path.sep)
        if len(parts) < 3:
            # it's not a python build, python is likely to be installed
            return

build_dir = parts[-3]
        if build_dir.lower() != 'pcbuild':
            self.skipTest("Tools/buildbot/test.bat requires PCbuild build, "
                          "found %s" % build_dir)

@unittest.skipUnless(sysconfig.is_python_build(),
                         'test.bat script is not installed')
    @unittest.skipUnless(sys.platform == 'win32', 'Windows only')
    def test_tools_buildbot_test(self):
        self.need_pcbuild()

# Tools\buildbot\test.bat
        script = os.path.join(ROOT_DIR, 'Tools', 'buildbot', 'test.bat')
        test_args = ['--testdir=%s' % self.tmptestdir]
        if platform.architecture()[0] == '64bit':
            test_args.append('-x64')   # 64-bit build
        if not Py_DEBUG:
            test_args.append('+d')     # Release build, use python.exe

args = [script] + test_args + self.tests
        self.run_batch(*args)

@unittest.skipUnless(sys.platform == 'win32', 'Windows only')
    def test_pcbuild_rt(self):
        self.need_pcbuild()

# PCbuild\rt.bat
        script = os.path.join(ROOT_DIR, r'PCbuild\rt.bat')
        rt_args = ["-q"]             # Quick, don't run tests twice
        if platform.architecture()[0] == '64bit':
            rt_args.append('-x64')   # 64-bit build
        if Py_DEBUG:
            rt_args.append('-d')     # Debug build, use python_d.exe
        args = [script] + rt_args + self.regrtest_args + self.tests
        self.run_batch(*args)

class ArgsTestCase(BaseTestCase):
    """
    Test arguments of the Python test suite.
    """

def run_tests(self, *testargs, **kw):
        cmdargs = ('-m', 'test', '--testdir=%s' % self.tmptestdir) + testargs
        return self.run_python(cmdargs, **kw)

def test_failing_test(self):
        # test a failing test
        code = textwrap.dedent("""
            import unittest
            from test import support

class FailingTest(unittest.TestCase):
                def test_failing(self):
                    self.fail("bug")

def test_main():
                support.run_unittest(FailingTest)
        """)
        test_ok = self.create_test('ok')
        test_failing = self.create_test('failing', code=code)
        tests = [test_ok, test_failing]

output = self.run_tests(*tests, exitcode=2)
        self.check_executed_tests(output, tests, failed=test_failing)

def test_resources(self):
        # test -u command line option
        tests = {}
        for resource in ('audio', 'network'):
            code = textwrap.dedent("""
                        from test import support; support.requires(%r)
                        import unittest
                        class PassingTest(unittest.TestCase):
                            def test_pass(self):
                                pass

def test_main():
                            support.run_unittest(PassingTest)
                    """ % resource)

tests[resource] = self.create_test(resource, code)
        test_names = sorted(tests.values())

# -u all: 2 resources enabled
        output = self.run_tests('-u', 'all', *test_names)
        self.check_executed_tests(output, test_names)

# -u audio: 1 resource enabled
        output = self.run_tests('-uaudio', *test_names)
        self.check_executed_tests(output, test_names,
                                  skipped=tests['network'])

# no option: 0 resources enabled
        output = self.run_tests(*test_names)
        self.check_executed_tests(output, test_names,
                                  skipped=test_names)

def test_random(self):
        # test -r and --randseed command line option
        code = textwrap.dedent("""
            import random
            print("TESTRANDOM: %s" % random.randint(1, 1000))
        """)
        test = self.create_test('random', code)

# first run to get the output with the random seed
        output = self.run_tests('-r', '-v', test)
        randseed = self.parse_random_seed(output)
        match = self.regex_search(r'TESTRANDOM: ([0-9]+)', output)
        test_random = int(match.group(1))

# try to reproduce with the random seed
        output = self.run_tests('-r', '-v', '--randseed=%s' % randseed, test)
        randseed2 = self.parse_random_seed(output)
        self.assertEqual(randseed2, randseed)

match = self.regex_search(r'TESTRANDOM: ([0-9]+)', output)
        test_random2 = int(match.group(1))
        self.assertEqual(test_random2, test_random)

def test_fromfile(self):
        # test --fromfile
        tests = [self.create_test() for index in range(5)]

# Write the list of files using a format similar to regrtest output:
        # [1/2] test_1
        # [2/2] test_2
        filename = support.TESTFN
        self.addCleanup(support.unlink, filename)

# test format 'test_opcodes'
        with open(filename, "w") as fp:
            for name in tests:
                print(name, file=fp)

output = self.run_tests('--fromfile', filename)
        self.check_executed_tests(output, tests)

def test_interrupted(self):
        code = TEST_INTERRUPTED
        test = self.create_test('sigint', code=code)
        output = self.run_tests(test, exitcode=130)
        self.check_executed_tests(output, test, omitted=test,
                                  interrupted=True)

def test_slowest(self):
        # test --slow
        tests = [self.create_test() for index in range(3)]
        output = self.run_tests("--slowest", *tests)
        self.check_executed_tests(output, tests)
        regex = ('10 slowest tests:\n'
                 '(?:- %s: .*\n){%s}'
                 % (self.TESTNAME_REGEX, len(tests)))
        self.check_line(output, regex)

def test_slow_interrupted(self):
        # Issue #25373: test --slowest with an interrupted test
        code = TEST_INTERRUPTED
        test = self.create_test("sigint", code=code)

try:
            import threading
            tests = (False, True)
        except ImportError:
            tests = (False,)
        for multiprocessing in tests:
            if multiprocessing:
                args = ("--slowest", "-j2", test)
            else:
                args = ("--slowest", test)
            output = self.run_tests(*args, exitcode=130)
            self.check_executed_tests(output, test,
                                      omitted=test, interrupted=True)

regex = ('10 slowest tests:\n')
            self.check_line(output, regex)

def test_coverage(self):
        # test --coverage
        test = self.create_test('coverage')
        output = self.run_tests("--coverage", test)
        self.check_executed_tests(output, [test])
        regex = (r'lines +cov% +module +$path$\n'
                 r'(?: *[0-9]+ *[0-9]{1,2}% *[^ ]+ +$[^)]+$+)+')
        self.check_line(output, regex)

def test_forever(self):
        # test --forever
        code = textwrap.dedent("""
            import __builtin__
            import unittest
            from test import support

class ForeverTester(unittest.TestCase):
                def test_run(self):
                    # Store the state in the __builtin__ module, because the test
                    # module is reload at each run
                    if 'RUN' in __builtin__.__dict__:
                        __builtin__.__dict__['RUN'] += 1
                        if __builtin__.__dict__['RUN'] >= 3:
                            self.fail("fail at the 3rd runs")
                    else:
                        __builtin__.__dict__['RUN'] = 1

def test_main():
                support.run_unittest(ForeverTester)
        """)
        test = self.create_test('forever', code=code)
        output = self.run_tests('--forever', test, exitcode=2)
        self.check_executed_tests(output, [test]*3, failed=test)

def check_leak(self, code, what):
        test = self.create_test('huntrleaks', code=code)

filename = 'reflog.txt'
        self.addCleanup(support.unlink, filename)
        output = self.run_tests('--huntrleaks', '3:3:', test,
                                exitcode=2,
                                stderr=subprocess.STDOUT)
        self.check_executed_tests(output, [test], failed=test)

line = 'beginning 6 repetitions\n123456\n......\n'
        self.check_line(output, re.escape(line))

line2 = '%s leaked [1, 1, 1] %s, sum=3\n' % (test, what)
        self.assertIn(line2, output)

with open(filename) as fp:
            reflog = fp.read()
            self.assertIn(line2, reflog)

@unittest.skipUnless(Py_DEBUG, 'need a debug build')
    @support.requires_type_collecting
    def test_huntrleaks(self):
        # test --huntrleaks
        code = textwrap.dedent("""
            import unittest
            from test import support

GLOBAL_LIST = []

class RefLeakTest(unittest.TestCase):
                def test_leak(self):
                    GLOBAL_LIST.append(object())

def test_main():
                support.run_unittest(RefLeakTest)
        """)
        self.check_leak(code, 'references')

@unittest.skipUnless(Py_DEBUG, 'need a debug build')
    def test_huntrleaks_fd_leak(self):
        # test --huntrleaks for file descriptor leak
        code = textwrap.dedent("""
            import os
            import unittest
            from test import support

class FDLeakTest(unittest.TestCase):
                def test_leak(self):
                    fd = os.open(__file__, os.O_RDONLY)
                    # bug: never close the file descriptor

def test_main():
                support.run_unittest(FDLeakTest)
        """)
        self.check_leak(code, 'file descriptors')

def test_list_tests(self):
        # test --list-tests
        tests = [self.create_test() for i in range(5)]
        output = self.run_tests('--list-tests', *tests)
        self.assertEqual(output.rstrip().splitlines(),
                         tests)

def test_list_cases(self):
        # test --list-cases
        code = textwrap.dedent("""
            import unittest

class Tests(unittest.TestCase):
                def test_method1(self):
                    pass
                def test_method2(self):
                    pass
        """)
        testname = self.create_test(code=code)

# Test --list-cases
        all_methods = ['%s.Tests.test_method1' % testname,
                       '%s.Tests.test_method2' % testname]
        output = self.run_tests('--list-cases', testname)
        self.assertEqual(output.splitlines(), all_methods)

# Test --list-cases with --match
        all_methods = ['%s.Tests.test_method1' % testname]
        output = self.run_tests('--list-cases',
                                '-m', 'test_method1',
                                testname)
        self.assertEqual(output.splitlines(), all_methods)

@unittest.skipIf(sys.platform.startswith('aix'),
                     "support._crash_python() doesn't work on AIX")
    def test_crashed(self):
        # Any code which causes a crash
        code = 'import test.support; test.support._crash_python()'
        crash_test = self.create_test(name="crash", code=code)
        ok_test = self.create_test(name="ok")

tests = [crash_test, ok_test]
        output = self.run_tests("-j2", *tests, exitcode=2)
        self.check_executed_tests(output, tests, failed=crash_test,
                                  randomize=True)

def parse_methods(self, output):
        regex = re.compile("^(test[^ ]+).*ok$", flags=re.MULTILINE)
        return [match.group(1) for match in regex.finditer(output)]

def test_matchfile(self):
        # Any code which causes a crash
        code = textwrap.dedent("""
            import unittest
            from test import support

class Tests(unittest.TestCase):
                def test_method1(self):
                    pass
                def test_method2(self):
                    pass
                def test_method3(self):
                    pass
                def test_method4(self):
                    pass

def test_main():
                support.run_unittest(Tests)
        """)
        all_methods = ['test_method1', 'test_method2',
                       'test_method3', 'test_method4']
        testname = self.create_test(code=code)

# by default, all methods should be run
        output = self.run_tests("-v", testname)
        methods = self.parse_methods(output)
        self.assertEqual(methods, all_methods)

# only run a subset
        filename = support.TESTFN
        self.addCleanup(support.unlink, filename)

subset = [
            # only match the method name
            'test_method1',
            # match the full identifier
            '%s.Tests.test_method3' % testname]
        with open(filename, "w") as fp:
            for name in subset:
                print(name, file=fp)

output = self.run_tests("-v", "--matchfile", filename, testname)
        methods = self.parse_methods(output)
        subset = ['test_method1', 'test_method3']
        self.assertEqual(methods, subset)

# bpo-34021: The test fails randomly for an unknown reason
    # on "x86 Windows XP VS9.0 2.7" buildbot worker.
    @unittest.skipIf(sys.platform == "win32", "test fails randomly on Windows")
    def test_env_changed(self):
        code = textwrap.dedent("""
            import unittest
            from test import support

class Tests(unittest.TestCase):
                def test_env_changed(self):
                    open("env_changed", "w").close()

def test_main():
                support.run_unittest(Tests)
        """)
        testname = self.create_test(code=code)

# don't fail by default
        output = self.run_tests(testname)
        self.check_executed_tests(output, [testname], env_changed=testname)

# fail with --fail-env-changed
        output = self.run_tests("--fail-env-changed", testname, exitcode=3)
        self.check_executed_tests(output, [testname], env_changed=testname,
                                  fail_env_changed=True)

def test_rerun_fail(self):
        code = textwrap.dedent("""
            import unittest
            from test import support

class Tests(unittest.TestCase):
                def test_bug(self):
                    # test always fail
                    self.fail("bug")

def test_main():
                support.run_unittest(Tests)
        """)
        testname = self.create_test(code=code)

output = self.run_tests("-w", testname, exitcode=2)
        self.check_executed_tests(output, [testname],
                                  failed=testname, rerun=testname)

def test_no_tests_ran(self):
        code = textwrap.dedent("""
            import unittest
            from test import support

class Tests(unittest.TestCase):
                def test_bug(self):
                    pass

def test_main():
                support.run_unittest(Tests)
        """)
        testname = self.create_test(code=code)

output = self.run_tests("-m", "nosuchtest", testname, exitcode=0)
        self.check_executed_tests(output, [testname], no_test_ran=testname)

def test_no_tests_ran_skip(self):
        code = textwrap.dedent("""
            import unittest

class Tests(unittest.TestCase):
                def test_skipped(self):
                    self.skipTest("because")
        """)
        testname = self.create_test(code=code)

output = self.run_tests(testname, exitcode=0)
        self.check_executed_tests(output, [testname])

def test_no_tests_ran_multiple_tests_nonexistent(self):
        code = textwrap.dedent("""
            import unittest
            from test import support

class Tests(unittest.TestCase):
                def test_bug(self):
                    pass

def test_main():
                support.run_unittest(Tests)
        """)
        testname = self.create_test(code=code)
        testname2 = self.create_test(code=code)

output = self.run_tests("-m", "nosuchtest",
                                testname, testname2,
                                exitcode=0)
        self.check_executed_tests(output, [testname, testname2],
                                  no_test_ran=[testname, testname2])

def test_no_test_ran_some_test_exist_some_not(self):
        code = textwrap.dedent("""
            import unittest
            from test import support

class Tests(unittest.TestCase):
                def test_bug(self):
                    pass

def test_main():
                support.run_unittest(Tests)
        """)
        testname = self.create_test(code=code)
        other_code = textwrap.dedent("""
            import unittest
            from test import support

class Tests(unittest.TestCase):
                def test_other_bug(self):
                    pass

def test_main():
                support.run_unittest(Tests)
        """)
        testname2 = self.create_test(code=other_code)

output = self.run_tests("-m", "nosuchtest", "-m", "test_other_bug",
                                testname, testname2,
                                exitcode=0)
        self.check_executed_tests(output, [testname, testname2],
                                  no_test_ran=[testname])

class TestUtils(unittest.TestCase):
    def test_format_duration(self):
        self.assertEqual(utils.format_duration(0),
                         '0 ms')
        self.assertEqual(utils.format_duration(1e-9),
                         '1 ms')
        self.assertEqual(utils.format_duration(10e-3),
                         '10 ms')
        self.assertEqual(utils.format_duration(1.5),
                         '1 sec 500 ms')
        self.assertEqual(utils.format_duration(1),
                         '1 sec')
        self.assertEqual(utils.format_duration(2 * 60),
                         '2 min')
        self.assertEqual(utils.format_duration(2 * 60 + 1),
                         '2 min 1 sec')
        self.assertEqual(utils.format_duration(3 * 3600),
                         '3 hour')
        self.assertEqual(utils.format_duration(3 * 3600  + 2 * 60 + 1),
                         '3 hour 2 min')
        self.assertEqual(utils.format_duration(3 * 3600 + 1),
                         '3 hour 1 sec')

def test_main():
    support.run_unittest(ProgramsTestCase, ArgsTestCase, TestUtils)

if __name__ == "__main__":
    test_main()

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✏️ test_regrtest.py