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PATH: opt / bitninja-python-dojo / embedded / lib / python3.9 / test

# Tests invocation of the interpreter with various command line arguments
# Most tests are executed with environment variables ignored
# See test_cmd_line_script.py for testing of script execution

import os
import subprocess
import sys
import tempfile
import textwrap
import unittest
from test import support
from test.support.script_helper import (
    spawn_python, kill_python, assert_python_ok, assert_python_failure,
    interpreter_requires_environment
)

# Debug build?
Py_DEBUG = hasattr(sys, "gettotalrefcount")

# XXX (ncoghlan): Move to script_helper and make consistent with run_python
def _kill_python_and_exit_code(p):
    data = kill_python(p)
    returncode = p.wait()
    return data, returncode

class CmdLineTest(unittest.TestCase):
    def test_directories(self):
        assert_python_failure('.')
        assert_python_failure('< .')

def verify_valid_flag(self, cmd_line):
        rc, out, err = assert_python_ok(*cmd_line)
        self.assertTrue(out == b'' or out.endswith(b'\n'))
        self.assertNotIn(b'Traceback', out)
        self.assertNotIn(b'Traceback', err)

def test_optimize(self):
        self.verify_valid_flag('-O')
        self.verify_valid_flag('-OO')

def test_site_flag(self):
        self.verify_valid_flag('-S')

def test_usage(self):
        rc, out, err = assert_python_ok('-h')
        lines = out.splitlines()
        self.assertIn(b'usage', lines[0])
        # The first line contains the program name,
        # but the rest should be ASCII-only
        b''.join(lines[1:]).decode('ascii')

def test_version(self):
        version = ('Python %d.%d' % sys.version_info[:2]).encode("ascii")
        for switch in '-V', '--version', '-VV':
            rc, out, err = assert_python_ok(switch)
            self.assertFalse(err.startswith(version))
            self.assertTrue(out.startswith(version))

def test_verbose(self):
        # -v causes imports to write to stderr.  If the write to
        # stderr itself causes an import to happen (for the output
        # codec), a recursion loop can occur.
        rc, out, err = assert_python_ok('-v')
        self.assertNotIn(b'stack overflow', err)
        rc, out, err = assert_python_ok('-vv')
        self.assertNotIn(b'stack overflow', err)

@unittest.skipIf(interpreter_requires_environment(),
                     'Cannot run -E tests when PYTHON env vars are required.')
    def test_xoptions(self):
        def get_xoptions(*args):
            # use subprocess module directly because test.support.script_helper adds
            # "-X faulthandler" to the command line
            args = (sys.executable, '-E') + args
            args += ('-c', 'import sys; print(sys._xoptions)')
            out = subprocess.check_output(args)
            opts = eval(out.splitlines()[0])
            return opts

opts = get_xoptions()
        self.assertEqual(opts, {})

opts = get_xoptions('-Xa', '-Xb=c,d=e')
        self.assertEqual(opts, {'a': True, 'b': 'c,d=e'})

def test_showrefcount(self):
        def run_python(*args):
            # this is similar to assert_python_ok but doesn't strip
            # the refcount from stderr.  It can be replaced once
            # assert_python_ok stops doing that.
            cmd = [sys.executable]
            cmd.extend(args)
            PIPE = subprocess.PIPE
            p = subprocess.Popen(cmd, stdout=PIPE, stderr=PIPE)
            out, err = p.communicate()
            p.stdout.close()
            p.stderr.close()
            rc = p.returncode
            self.assertEqual(rc, 0)
            return rc, out, err
        code = 'import sys; print(sys._xoptions)'
        # normally the refcount is hidden
        rc, out, err = run_python('-c', code)
        self.assertEqual(out.rstrip(), b'{}')
        self.assertEqual(err, b'')
        # "-X showrefcount" shows the refcount, but only in debug builds
        rc, out, err = run_python('-X', 'showrefcount', '-c', code)
        self.assertEqual(out.rstrip(), b"{'showrefcount': True}")
        if Py_DEBUG:
            self.assertRegex(err, br'^\[\d+ refs, \d+ blocks\]')
        else:
            self.assertEqual(err, b'')

def test_run_module(self):
        # Test expected operation of the '-m' switch
        # Switch needs an argument
        assert_python_failure('-m')
        # Check we get an error for a nonexistent module
        assert_python_failure('-m', 'fnord43520xyz')
        # Check the runpy module also gives an error for
        # a nonexistent module
        assert_python_failure('-m', 'runpy', 'fnord43520xyz')
        # All good if module is located and run successfully
        assert_python_ok('-m', 'timeit', '-n', '1')

def test_run_module_bug1764407(self):
        # -m and -i need to play well together
        # Runs the timeit module and checks the __main__
        # namespace has been populated appropriately
        p = spawn_python('-i', '-m', 'timeit', '-n', '1')
        p.stdin.write(b'Timer\n')
        p.stdin.write(b'exit()\n')
        data = kill_python(p)
        self.assertTrue(data.find(b'1 loop') != -1)
        self.assertTrue(data.find(b'__main__.Timer') != -1)

def test_run_code(self):
        # Test expected operation of the '-c' switch
        # Switch needs an argument
        assert_python_failure('-c')
        # Check we get an error for an uncaught exception
        assert_python_failure('-c', 'raise Exception')
        # All good if execution is successful
        assert_python_ok('-c', 'pass')

@unittest.skipUnless(support.FS_NONASCII, 'need support.FS_NONASCII')
    def test_non_ascii(self):
        # Test handling of non-ascii data
        command = ("assert(ord(%r) == %s)"
                   % (support.FS_NONASCII, ord(support.FS_NONASCII)))
        assert_python_ok('-c', command)

# On Windows, pass bytes to subprocess doesn't test how Python decodes the
    # command line, but how subprocess does decode bytes to unicode. Python
    # doesn't decode the command line because Windows provides directly the
    # arguments as unicode (using wmain() instead of main()).
    @unittest.skipIf(sys.platform == 'win32',
                     'Windows has a native unicode API')
    def test_undecodable_code(self):
        undecodable = b"\xff"
        env = os.environ.copy()
        # Use C locale to get ascii for the locale encoding
        env['LC_ALL'] = 'C'
        env['PYTHONCOERCECLOCALE'] = '0'
        code = (
            b'import locale; '
            b'print(ascii("' + undecodable + b'"), '
                b'locale.getpreferredencoding())')
        p = subprocess.Popen(
            [sys.executable, "-c", code],
            stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
            env=env)
        stdout, stderr = p.communicate()
        if p.returncode == 1:
            # _Py_char2wchar() decoded b'\xff' as '\udcff' (b'\xff' is not
            # decodable from ASCII) and run_command() failed on
            # PyUnicode_AsUTF8String(). This is the expected behaviour on
            # Linux.
            pattern = b"Unable to decode the command from the command line:"
        elif p.returncode == 0:
            # _Py_char2wchar() decoded b'\xff' as '\xff' even if the locale is
            # C and the locale encoding is ASCII. It occurs on FreeBSD, Solaris
            # and Mac OS X.
            pattern = b"'\\xff' "
            # The output is followed by the encoding name, an alias to ASCII.
            # Examples: "US-ASCII" or "646" (ISO 646, on Solaris).
        else:
            raise AssertionError("Unknown exit code: %s, output=%a" % (p.returncode, stdout))
        if not stdout.startswith(pattern):
            raise AssertionError("%a doesn't start with %a" % (stdout, pattern))

@unittest.skipIf(sys.platform == 'win32',
                     'Windows has a native unicode API')
    def test_invalid_utf8_arg(self):
        # bpo-35883: Py_DecodeLocale() must escape b'\xfd\xbf\xbf\xbb\xba\xba'
        # byte sequence with surrogateescape rather than decoding it as the
        # U+7fffbeba character which is outside the [U+0000; U+10ffff] range of
        # Python Unicode characters.
        #
        # Test with default config, in the C locale, in the Python UTF-8 Mode.
        code = 'import sys, os; s=os.fsencode(sys.argv[1]); print(ascii(s))'
        base_cmd = [sys.executable, '-c', code]

def run_default(arg):
            cmd = [sys.executable, '-c', code, arg]
            return subprocess.run(cmd, stdout=subprocess.PIPE, text=True)

def run_c_locale(arg):
            cmd = [sys.executable, '-c', code, arg]
            env = dict(os.environ)
            env['LC_ALL'] = 'C'
            return subprocess.run(cmd, stdout=subprocess.PIPE,
                                  text=True, env=env)

def run_utf8_mode(arg):
            cmd = [sys.executable, '-X', 'utf8', '-c', code, arg]
            return subprocess.run(cmd, stdout=subprocess.PIPE, text=True)

valid_utf8 = 'e:\xe9, euro:\u20ac, non-bmp:\U0010ffff'.encode('utf-8')
        # invalid UTF-8 byte sequences with a valid UTF-8 sequence
        # in the middle.
        invalid_utf8 = (
            b'\xff'                      # invalid byte
            b'\xc3\xff'                  # invalid byte sequence
            b'\xc3\xa9'                  # valid utf-8: U+00E9 character
            b'\xed\xa0\x80'              # lone surrogate character (invalid)
            b'\xfd\xbf\xbf\xbb\xba\xba'  # character outside [U+0000; U+10ffff]
        )
        test_args = [valid_utf8, invalid_utf8]

for run_cmd in (run_default, run_c_locale, run_utf8_mode):
            with self.subTest(run_cmd=run_cmd):
                for arg in test_args:
                    proc = run_cmd(arg)
                    self.assertEqual(proc.stdout.rstrip(), ascii(arg))

@unittest.skipUnless((sys.platform == 'darwin' or
                support.is_android), 'test specific to Mac OS X and Android')
    def test_osx_android_utf8(self):
        text = 'e:\xe9, euro:\u20ac, non-bmp:\U0010ffff'.encode('utf-8')
        code = "import sys; print(ascii(sys.argv[1]))"

decoded = text.decode('utf-8', 'surrogateescape')
        expected = ascii(decoded).encode('ascii') + b'\n'

env = os.environ.copy()
        # C locale gives ASCII locale encoding, but Python uses UTF-8
        # to parse the command line arguments on Mac OS X and Android.
        env['LC_ALL'] = 'C'

p = subprocess.Popen(
            (sys.executable, "-c", code, text),
            stdout=subprocess.PIPE,
            env=env)
        stdout, stderr = p.communicate()
        self.assertEqual(stdout, expected)
        self.assertEqual(p.returncode, 0)

def test_non_interactive_output_buffering(self):
        code = textwrap.dedent("""
            import sys
            out = sys.stdout
            print(out.isatty(), out.write_through, out.line_buffering)
            err = sys.stderr
            print(err.isatty(), err.write_through, err.line_buffering)
        """)
        args = [sys.executable, '-c', code]
        proc = subprocess.run(args, stdout=subprocess.PIPE,
                              stderr=subprocess.PIPE, text=True, check=True)
        self.assertEqual(proc.stdout,
                         'False False False\n'
                         'False False True\n')

def test_unbuffered_output(self):
        # Test expected operation of the '-u' switch
        for stream in ('stdout', 'stderr'):
            # Binary is unbuffered
            code = ("import os, sys; sys.%s.buffer.write(b'x'); os._exit(0)"
                % stream)
            rc, out, err = assert_python_ok('-u', '-c', code)
            data = err if stream == 'stderr' else out
            self.assertEqual(data, b'x', "binary %s not unbuffered" % stream)
            # Text is unbuffered
            code = ("import os, sys; sys.%s.write('x'); os._exit(0)"
                % stream)
            rc, out, err = assert_python_ok('-u', '-c', code)
            data = err if stream == 'stderr' else out
            self.assertEqual(data, b'x', "text %s not unbuffered" % stream)

def test_unbuffered_input(self):
        # sys.stdin still works with '-u'
        code = ("import sys; sys.stdout.write(sys.stdin.read(1))")
        p = spawn_python('-u', '-c', code)
        p.stdin.write(b'x')
        p.stdin.flush()
        data, rc = _kill_python_and_exit_code(p)
        self.assertEqual(rc, 0)
        self.assertTrue(data.startswith(b'x'), data)

def test_large_PYTHONPATH(self):
        path1 = "ABCDE" * 100
        path2 = "FGHIJ" * 100
        path = path1 + os.pathsep + path2

code = """if 1:
            import sys
            path = ":".join(sys.path)
            path = path.encode("ascii", "backslashreplace")
            sys.stdout.buffer.write(path)"""
        rc, out, err = assert_python_ok('-S', '-c', code,
                                        PYTHONPATH=path)
        self.assertIn(path1.encode('ascii'), out)
        self.assertIn(path2.encode('ascii'), out)

def test_empty_PYTHONPATH_issue16309(self):
        # On Posix, it is documented that setting PATH to the
        # empty string is equivalent to not setting PATH at all,
        # which is an exception to the rule that in a string like
        # "/bin::/usr/bin" the empty string in the middle gets
        # interpreted as '.'
        code = """if 1:
            import sys
            path = ":".join(sys.path)
            path = path.encode("ascii", "backslashreplace")
            sys.stdout.buffer.write(path)"""
        rc1, out1, err1 = assert_python_ok('-c', code, PYTHONPATH="")
        rc2, out2, err2 = assert_python_ok('-c', code, __isolated=False)
        # regarding to Posix specification, outputs should be equal
        # for empty and unset PYTHONPATH
        self.assertEqual(out1, out2)

def test_displayhook_unencodable(self):
        for encoding in ('ascii', 'latin-1', 'utf-8'):
            env = os.environ.copy()
            env['PYTHONIOENCODING'] = encoding
            p = subprocess.Popen(
                [sys.executable, '-i'],
                stdin=subprocess.PIPE,
                stdout=subprocess.PIPE,
                stderr=subprocess.STDOUT,
                env=env)
            # non-ascii, surrogate, non-BMP printable, non-BMP unprintable
            text = "a=\xe9 b=\uDC80 c=\U00010000 d=\U0010FFFF"
            p.stdin.write(ascii(text).encode('ascii') + b"\n")
            p.stdin.write(b'exit()\n')
            data = kill_python(p)
            escaped = repr(text).encode(encoding, 'backslashreplace')
            self.assertIn(escaped, data)

def check_input(self, code, expected):
        with tempfile.NamedTemporaryFile("wb+") as stdin:
            sep = os.linesep.encode('ASCII')
            stdin.write(sep.join((b'abc', b'def')))
            stdin.flush()
            stdin.seek(0)
            with subprocess.Popen(
                (sys.executable, "-c", code),
                stdin=stdin, stdout=subprocess.PIPE) as proc:
                stdout, stderr = proc.communicate()
        self.assertEqual(stdout.rstrip(), expected)

def test_stdin_readline(self):
        # Issue #11272: check that sys.stdin.readline() replaces '\r\n' by '\n'
        # on Windows (sys.stdin is opened in binary mode)
        self.check_input(
            "import sys; print(repr(sys.stdin.readline()))",
            b"'abc\\n'")

def test_builtin_input(self):
        # Issue #11272: check that input() strips newlines ('\n' or '\r\n')
        self.check_input(
            "print(repr(input()))",
            b"'abc'")

def test_output_newline(self):
        # Issue 13119 Newline for print() should be \r\n on Windows.
        code = """if 1:
            import sys
            print(1)
            print(2)
            print(3, file=sys.stderr)
            print(4, file=sys.stderr)"""
        rc, out, err = assert_python_ok('-c', code)

if sys.platform == 'win32':
            self.assertEqual(b'1\r\n2\r\n', out)
            self.assertEqual(b'3\r\n4\r\n', err)
        else:
            self.assertEqual(b'1\n2\n', out)
            self.assertEqual(b'3\n4\n', err)

def test_unmached_quote(self):
        # Issue #10206: python program starting with unmatched quote
        # spewed spaces to stdout
        rc, out, err = assert_python_failure('-c', "'")
        self.assertRegex(err.decode('ascii', 'ignore'), 'SyntaxError')
        self.assertEqual(b'', out)

def test_stdout_flush_at_shutdown(self):
        # Issue #5319: if stdout.flush() fails at shutdown, an error should
        # be printed out.
        code = """if 1:
            import os, sys, test.support
            test.support.SuppressCrashReport().__enter__()
            sys.stdout.write('x')
            os.close(sys.stdout.fileno())"""
        rc, out, err = assert_python_failure('-c', code)
        self.assertEqual(b'', out)
        self.assertEqual(120, rc)
        self.assertRegex(err.decode('ascii', 'ignore'),
                         'Exception ignored in.*\nOSError: .*')

def test_closed_stdout(self):
        # Issue #13444: if stdout has been explicitly closed, we should
        # not attempt to flush it at shutdown.
        code = "import sys; sys.stdout.close()"
        rc, out, err = assert_python_ok('-c', code)
        self.assertEqual(b'', err)

# Issue #7111: Python should work without standard streams

@unittest.skipIf(os.name != 'posix', "test needs POSIX semantics")
    @unittest.skipIf(sys.platform == "vxworks",
                         "test needs preexec support in subprocess.Popen")
    def _test_no_stdio(self, streams):
        code = """if 1:
            import os, sys
            for i, s in enumerate({streams}):
                if getattr(sys, s) is not None:
                    os._exit(i + 1)
            os._exit(42)""".format(streams=streams)
        def preexec():
            if 'stdin' in streams:
                os.close(0)
            if 'stdout' in streams:
                os.close(1)
            if 'stderr' in streams:
                os.close(2)
        p = subprocess.Popen(
            [sys.executable, "-E", "-c", code],
            stdin=subprocess.PIPE,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            preexec_fn=preexec)
        out, err = p.communicate()
        self.assertEqual(err, b'')
        self.assertEqual(p.returncode, 42)

def test_no_stdin(self):
        self._test_no_stdio(['stdin'])

def test_no_stdout(self):
        self._test_no_stdio(['stdout'])

def test_no_stderr(self):
        self._test_no_stdio(['stderr'])

def test_no_std_streams(self):
        self._test_no_stdio(['stdin', 'stdout', 'stderr'])

def test_hash_randomization(self):
        # Verify that -R enables hash randomization:
        self.verify_valid_flag('-R')
        hashes = []
        if os.environ.get('PYTHONHASHSEED', 'random') != 'random':
            env = dict(os.environ)  # copy
            # We need to test that it is enabled by default without
            # the environment variable enabling it for us.
            del env['PYTHONHASHSEED']
            env['__cleanenv'] = '1'  # consumed by assert_python_ok()
        else:
            env = {}
        for i in range(3):
            code = 'print(hash("spam"))'
            rc, out, err = assert_python_ok('-c', code, **env)
            self.assertEqual(rc, 0)
            hashes.append(out)
        hashes = sorted(set(hashes))  # uniq
        # Rare chance of failure due to 3 random seeds honestly being equal.
        self.assertGreater(len(hashes), 1,
                           msg='3 runs produced an identical random hash '
                               ' for "spam": {}'.format(hashes))

# Verify that sys.flags contains hash_randomization
        code = 'import sys; print("random is", sys.flags.hash_randomization)'
        rc, out, err = assert_python_ok('-c', code, PYTHONHASHSEED='')
        self.assertIn(b'random is 1', out)

rc, out, err = assert_python_ok('-c', code, PYTHONHASHSEED='random')
        self.assertIn(b'random is 1', out)

rc, out, err = assert_python_ok('-c', code, PYTHONHASHSEED='0')
        self.assertIn(b'random is 0', out)

rc, out, err = assert_python_ok('-R', '-c', code, PYTHONHASHSEED='0')
        self.assertIn(b'random is 1', out)

def test_del___main__(self):
        # Issue #15001: PyRun_SimpleFileExFlags() did crash because it kept a
        # borrowed reference to the dict of __main__ module and later modify
        # the dict whereas the module was destroyed
        filename = support.TESTFN
        self.addCleanup(support.unlink, filename)
        with open(filename, "w") as script:
            print("import sys", file=script)
            print("del sys.modules['__main__']", file=script)
        assert_python_ok(filename)

def test_unknown_options(self):
        rc, out, err = assert_python_failure('-E', '-z')
        self.assertIn(b'Unknown option: -z', err)
        self.assertEqual(err.splitlines().count(b'Unknown option: -z'), 1)
        self.assertEqual(b'', out)
        # Add "without='-E'" to prevent _assert_python to append -E
        # to env_vars and change the output of stderr
        rc, out, err = assert_python_failure('-z', without='-E')
        self.assertIn(b'Unknown option: -z', err)
        self.assertEqual(err.splitlines().count(b'Unknown option: -z'), 1)
        self.assertEqual(b'', out)
        rc, out, err = assert_python_failure('-a', '-z', without='-E')
        self.assertIn(b'Unknown option: -a', err)
        # only the first unknown option is reported
        self.assertNotIn(b'Unknown option: -z', err)
        self.assertEqual(err.splitlines().count(b'Unknown option: -a'), 1)
        self.assertEqual(b'', out)

@unittest.skipIf(interpreter_requires_environment(),
                     'Cannot run -I tests when PYTHON env vars are required.')
    def test_isolatedmode(self):
        self.verify_valid_flag('-I')
        self.verify_valid_flag('-IEs')
        rc, out, err = assert_python_ok('-I', '-c',
            'from sys import flags as f; '
            'print(f.no_user_site, f.ignore_environment, f.isolated)',
            # dummyvar to prevent extraneous -E
            dummyvar="")
        self.assertEqual(out.strip(), b'1 1 1')
        with support.temp_cwd() as tmpdir:
            fake = os.path.join(tmpdir, "uuid.py")
            main = os.path.join(tmpdir, "main.py")
            with open(fake, "w") as f:
                f.write("raise RuntimeError('isolated mode test')\n")
            with open(main, "w") as f:
                f.write("import uuid\n")
                f.write("print('ok')\n")
            self.assertRaises(subprocess.CalledProcessError,
                              subprocess.check_output,
                              [sys.executable, main], cwd=tmpdir,
                              stderr=subprocess.DEVNULL)
            out = subprocess.check_output([sys.executable, "-I", main],
                                          cwd=tmpdir)
            self.assertEqual(out.strip(), b"ok")

def test_sys_flags_set(self):
        # Issue 31845: a startup refactoring broke reading flags from env vars
        for value, expected in (("", 0), ("1", 1), ("text", 1), ("2", 2)):
            env_vars = dict(
                PYTHONDEBUG=value,
                PYTHONOPTIMIZE=value,
                PYTHONDONTWRITEBYTECODE=value,
                PYTHONVERBOSE=value,
            )
            dont_write_bytecode = int(bool(value))
            code = (
                "import sys; "
                "sys.stderr.write(str(sys.flags)); "
                f"""sys.exit(not (
                    sys.flags.debug == sys.flags.optimize ==
                    sys.flags.verbose ==
                    {expected}
                    and sys.flags.dont_write_bytecode == {dont_write_bytecode}
                ))"""
            )
            with self.subTest(envar_value=value):
                assert_python_ok('-c', code, **env_vars)

def test_set_pycache_prefix(self):
        # sys.pycache_prefix can be set from either -X pycache_prefix or
        # PYTHONPYCACHEPREFIX env var, with the former taking precedence.
        NO_VALUE = object()  # `-X pycache_prefix` with no `=PATH`
        cases = [
            # (PYTHONPYCACHEPREFIX, -X pycache_prefix, sys.pycache_prefix)
            (None, None, None),
            ('foo', None, 'foo'),
            (None, 'bar', 'bar'),
            ('foo', 'bar', 'bar'),
            ('foo', '', None),
            ('foo', NO_VALUE, None),
        ]
        for envval, opt, expected in cases:
            exp_clause = "is None" if expected is None else f'== "{expected}"'
            code = f"import sys; sys.exit(not sys.pycache_prefix {exp_clause})"
            args = ['-c', code]
            env = {} if envval is None else {'PYTHONPYCACHEPREFIX': envval}
            if opt is NO_VALUE:
                args[:0] = ['-X', 'pycache_prefix']
            elif opt is not None:
                args[:0] = ['-X', f'pycache_prefix={opt}']
            with self.subTest(envval=envval, opt=opt):
                with support.temp_cwd():
                    assert_python_ok(*args, **env)

def run_xdev(self, *args, check_exitcode=True, xdev=True):
        env = dict(os.environ)
        env.pop('PYTHONWARNINGS', None)
        env.pop('PYTHONDEVMODE', None)
        env.pop('PYTHONMALLOC', None)

if xdev:
            args = (sys.executable, '-X', 'dev', *args)
        else:
            args = (sys.executable, *args)
        proc = subprocess.run(args,
                              stdout=subprocess.PIPE,
                              stderr=subprocess.STDOUT,
                              universal_newlines=True,
                              env=env)
        if check_exitcode:
            self.assertEqual(proc.returncode, 0, proc)
        return proc.stdout.rstrip()

def test_xdev(self):
        # sys.flags.dev_mode
        code = "import sys; print(sys.flags.dev_mode)"
        out = self.run_xdev("-c", code, xdev=False)
        self.assertEqual(out, "False")
        out = self.run_xdev("-c", code)
        self.assertEqual(out, "True")

# Warnings
        code = ("import warnings; "
                "print(' '.join('%s::%s' % (f[0], f[2].__name__) "
                                "for f in warnings.filters))")
        if Py_DEBUG:
            expected_filters = "default::Warning"
        else:
            expected_filters = ("default::Warning "
                                "default::DeprecationWarning "
                                "ignore::DeprecationWarning "
                                "ignore::PendingDeprecationWarning "
                                "ignore::ImportWarning "
                                "ignore::ResourceWarning")

out = self.run_xdev("-c", code)
        self.assertEqual(out, expected_filters)

out = self.run_xdev("-b", "-c", code)
        self.assertEqual(out, f"default::BytesWarning {expected_filters}")

out = self.run_xdev("-bb", "-c", code)
        self.assertEqual(out, f"error::BytesWarning {expected_filters}")

out = self.run_xdev("-Werror", "-c", code)
        self.assertEqual(out, f"error::Warning {expected_filters}")

# Memory allocator debug hooks
        try:
            import _testcapi
        except ImportError:
            pass
        else:
            code = "import _testcapi; print(_testcapi.pymem_getallocatorsname())"
            with support.SuppressCrashReport():
                out = self.run_xdev("-c", code, check_exitcode=False)
            if support.with_pymalloc():
                alloc_name = "pymalloc_debug"
            else:
                alloc_name = "malloc_debug"
            self.assertEqual(out, alloc_name)

# Faulthandler
        try:
            import faulthandler
        except ImportError:
            pass
        else:
            code = "import faulthandler; print(faulthandler.is_enabled())"
            out = self.run_xdev("-c", code)
            self.assertEqual(out, "True")

def check_warnings_filters(self, cmdline_option, envvar, use_pywarning=False):
        if use_pywarning:
            code = ("import sys; from test.support import import_fresh_module; "
                    "warnings = import_fresh_module('warnings', blocked=['_warnings']); ")
        else:
            code = "import sys, warnings; "
        code += ("print(' '.join('%s::%s' % (f[0], f[2].__name__) "
                                "for f in warnings.filters))")
        args = (sys.executable, '-W', cmdline_option, '-bb', '-c', code)
        env = dict(os.environ)
        env.pop('PYTHONDEVMODE', None)
        env["PYTHONWARNINGS"] = envvar
        proc = subprocess.run(args,
                              stdout=subprocess.PIPE,
                              stderr=subprocess.STDOUT,
                              universal_newlines=True,
                              env=env)
        self.assertEqual(proc.returncode, 0, proc)
        return proc.stdout.rstrip()

def test_warnings_filter_precedence(self):
        expected_filters = ("error::BytesWarning "
                            "once::UserWarning "
                            "always::UserWarning")
        if not Py_DEBUG:
            expected_filters += (" "
                                 "default::DeprecationWarning "
                                 "ignore::DeprecationWarning "
                                 "ignore::PendingDeprecationWarning "
                                 "ignore::ImportWarning "
                                 "ignore::ResourceWarning")

out = self.check_warnings_filters("once::UserWarning",
                                          "always::UserWarning")
        self.assertEqual(out, expected_filters)

out = self.check_warnings_filters("once::UserWarning",
                                          "always::UserWarning",
                                          use_pywarning=True)
        self.assertEqual(out, expected_filters)

def check_pythonmalloc(self, env_var, name):
        code = 'import _testcapi; print(_testcapi.pymem_getallocatorsname())'
        env = dict(os.environ)
        env.pop('PYTHONDEVMODE', None)
        if env_var is not None:
            env['PYTHONMALLOC'] = env_var
        else:
            env.pop('PYTHONMALLOC', None)
        args = (sys.executable, '-c', code)
        proc = subprocess.run(args,
                              stdout=subprocess.PIPE,
                              stderr=subprocess.STDOUT,
                              universal_newlines=True,
                              env=env)
        self.assertEqual(proc.stdout.rstrip(), name)
        self.assertEqual(proc.returncode, 0)

def test_pythonmalloc(self):
        # Test the PYTHONMALLOC environment variable
        pymalloc = support.with_pymalloc()
        if pymalloc:
            default_name = 'pymalloc_debug' if Py_DEBUG else 'pymalloc'
            default_name_debug = 'pymalloc_debug'
        else:
            default_name = 'malloc_debug' if Py_DEBUG else 'malloc'
            default_name_debug = 'malloc_debug'

tests = [
            (None, default_name),
            ('debug', default_name_debug),
            ('malloc', 'malloc'),
            ('malloc_debug', 'malloc_debug'),
        ]
        if pymalloc:
            tests.extend((
                ('pymalloc', 'pymalloc'),
                ('pymalloc_debug', 'pymalloc_debug'),
            ))

for env_var, name in tests:
            with self.subTest(env_var=env_var, name=name):
                self.check_pythonmalloc(env_var, name)

def test_pythondevmode_env(self):
        # Test the PYTHONDEVMODE environment variable
        code = "import sys; print(sys.flags.dev_mode)"
        env = dict(os.environ)
        env.pop('PYTHONDEVMODE', None)
        args = (sys.executable, '-c', code)

proc = subprocess.run(args, stdout=subprocess.PIPE,
                              universal_newlines=True, env=env)
        self.assertEqual(proc.stdout.rstrip(), 'False')
        self.assertEqual(proc.returncode, 0, proc)

env['PYTHONDEVMODE'] = '1'
        proc = subprocess.run(args, stdout=subprocess.PIPE,
                              universal_newlines=True, env=env)
        self.assertEqual(proc.stdout.rstrip(), 'True')
        self.assertEqual(proc.returncode, 0, proc)

@unittest.skipUnless(sys.platform == 'win32',
                         'bpo-32457 only applies on Windows')
    def test_argv0_normalization(self):
        args = sys.executable, '-c', 'print(0)'
        prefix, exe = os.path.split(sys.executable)
        executable = prefix + '\\.\\.\\.\\' + exe

proc = subprocess.run(args, stdout=subprocess.PIPE,
                              executable=executable)
        self.assertEqual(proc.returncode, 0, proc)
        self.assertEqual(proc.stdout.strip(), b'0')

def test_parsing_error(self):
        args = [sys.executable, '-I', '--unknown-option']
        proc = subprocess.run(args,
                              stdout=subprocess.PIPE,
                              stderr=subprocess.PIPE,
                              text=True)
        err_msg = "unknown option --unknown-option\nusage: "
        self.assertTrue(proc.stderr.startswith(err_msg), proc.stderr)
        self.assertNotEqual(proc.returncode, 0)

@unittest.skipIf(interpreter_requires_environment(),
                 'Cannot run -I tests when PYTHON env vars are required.')
class IgnoreEnvironmentTest(unittest.TestCase):

def run_ignoring_vars(self, predicate, **env_vars):
        # Runs a subprocess with -E set, even though we're passing
        # specific environment variables
        # Logical inversion to match predicate check to a zero return
        # code indicating success
        code = "import sys; sys.stderr.write(str(sys.flags)); sys.exit(not ({}))".format(predicate)
        return assert_python_ok('-E', '-c', code, **env_vars)

def test_ignore_PYTHONPATH(self):
        path = "should_be_ignored"
        self.run_ignoring_vars("'{}' not in sys.path".format(path),
                               PYTHONPATH=path)

def test_ignore_PYTHONHASHSEED(self):
        self.run_ignoring_vars("sys.flags.hash_randomization == 1",
                               PYTHONHASHSEED="0")

def test_sys_flags_not_set(self):
        # Issue 31845: a startup refactoring broke reading flags from env vars
        expected_outcome = """
            (sys.flags.debug == sys.flags.optimize ==
             sys.flags.dont_write_bytecode == sys.flags.verbose == 0)
        """
        self.run_ignoring_vars(
            expected_outcome,
            PYTHONDEBUG="1",
            PYTHONOPTIMIZE="1",
            PYTHONDONTWRITEBYTECODE="1",
            PYTHONVERBOSE="1",
        )

def tearDownModule():
    support.reap_children()

if __name__ == "__main__":
    unittest.main()

[+] ..
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[+] encoded_modules
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[-] testcodec.py [edit]
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[-] dataclass_textanno.py [edit]
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[-] nosan.pem [edit]
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[-] test_embed.py [edit]
[-] ssl_cert.pem [edit]
[-] test_dbm_gnu.py [edit]
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[-] test_funcattrs.py [edit]