gh90791 tests involving libx11 can segfault on asanmsan builds skip modules packages and tests using tkinter concurrent futures uses a getattr hook its all triggers import of a submodule which fails when multiprocessing is not available silent fail here seems the best route since some modules may not be available or not initialize properly in all environments include the module name in the exception string list of denied modules and packages will raise a syntaxerror when compiling the exec statement in case socket fails to build make this test fail more gracefully than an attributeerror somewhere deep in concurrent futures email or unittest this heuristic speeds up the process by removing de facto most test modules and avoiding the autoexecuting ones gh 90791 tests involving libx11 can segfault on asan msan builds skip modules packages and tests using _tkinter concurrent futures uses a __getattr__ hook its __all__ triggers import of a submodule which fails when _multiprocessing is not available silent fail here seems the best route since some modules may not be available or not initialize properly in all environments include the module name in the exception string list of denied modules and packages will raise a syntaxerror when compiling the exec statement in case _socket fails to build make this test fail more gracefully than an attributeerror somewhere deep in concurrent futures email or unittest this heuristic speeds up the process by removing de facto most test modules and avoiding the auto executing ones
import unittest
from test import support
from test.support import warnings_helper
import os
import sys
import types

try:
    import _multiprocessing
except ModuleNotFoundError:
    _multiprocessing = None


if support.check_sanitizer(address=True, memory=True):
    SKIP_MODULES = frozenset((
        
        
        '_tkinter',
        'tkinter',
        'test_tkinter',
        'test_ttk',
        'test_ttk_textonly',
        'idlelib',
        'test_idle',
    ))
else:
    SKIP_MODULES = ()


class NoAll(RuntimeError):
    pass

class FailedImport(RuntimeError):
    pass


class AllTest(unittest.TestCase):

    def setUp(self):
        
        
        
        if _multiprocessing is None:
            sys.modules["_multiprocessing"] = types.ModuleType("_multiprocessing")

    def tearDown(self):
        if _multiprocessing is None:
            sys.modules.pop("_multiprocessing")

    def check_all(self, modname):
        names = {}
        with warnings_helper.check_warnings(
            (f".*{modname}", DeprecationWarning),
            (".* (module|package)", DeprecationWarning),
            (".* (module|package)", PendingDeprecationWarning),
            ("", ResourceWarning),
            quiet=True):
            try:
                exec("import %s" % modname, names)
            except:
                
                
                
                raise FailedImport(modname)
        if not hasattr(sys.modules[modname], "__all__"):
            raise NoAll(modname)
        names = {}
        with self.subTest(module=modname):
            with warnings_helper.check_warnings(
                ("", DeprecationWarning),
                ("", ResourceWarning),
                quiet=True):
                try:
                    exec("from %s import *" % modname, names)
                except Exception as e:
                    
                    self.fail("__all__ failure in {}: {}: {}".format(
                              modname, e.__class__.__name__, e))
                if "__builtins__" in names:
                    del names["__builtins__"]
                if '__annotations__' in names:
                    del names['__annotations__']
                if "__warningregistry__" in names:
                    del names["__warningregistry__"]
                keys = set(names)
                all_list = sys.modules[modname].__all__
                all_set = set(all_list)
                self.assertCountEqual(all_set, all_list, "in module {}".format(modname))
                self.assertEqual(keys, all_set, "in module {}".format(modname))

    def walk_modules(self, basedir, modpath):
        for fn in sorted(os.listdir(basedir)):
            path = os.path.join(basedir, fn)
            if os.path.isdir(path):
                if fn in SKIP_MODULES:
                    continue
                pkg_init = os.path.join(path, '__init__.py')
                if os.path.exists(pkg_init):
                    yield pkg_init, modpath + fn
                    for p, m in self.walk_modules(path, modpath + fn + "."):
                        yield p, m
                continue

            if fn == '__init__.py':
                continue
            if not fn.endswith('.py'):
                continue
            modname = fn.removesuffix('.py')
            if modname in SKIP_MODULES:
                continue
            yield path, modpath + modname

    def test_all(self):
        
        denylist = set([
            
            '__future__',
        ])

        
        
        
        import _socket

        ignored = []
        failed_imports = []
        lib_dir = os.path.dirname(os.path.dirname(__file__))
        for path, modname in self.walk_modules(lib_dir, ""):
            m = modname
            denied = False
            while m:
                if m in denylist:
                    denied = True
                    break
                m = m.rpartition('.')[0]
            if denied:
                continue
            if support.verbose:
                print(f"Check {modname}", flush=True)
            try:
                
                
                with open(path, "rb") as f:
                    if b"__all__" not in f.read():
                        raise NoAll(modname)
                self.check_all(modname)
            except NoAll:
                ignored.append(modname)
            except FailedImport:
                failed_imports.append(modname)

        if support.verbose:
            print('Following modules have no __all__ and have been ignored:',
                  ignored)
            print('Following modules failed to be imported:', failed_imports)


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