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"""Check __all__, __implements__, __extensions__, __imports__ of the modules""" from __future__ import print_function import sys import unittest import types import importlib import warnings from gevent.testing import six from gevent.testing.modules import walk_modules from gevent.testing.sysinfo import PLATFORM_SPECIFIC_SUFFIXES from gevent._patcher import MAPPING class ANY(object): def __contains__(self, item): return True ANY = ANY() NOT_IMPLEMENTED = { 'socket': ['CAPI'], 'thread': ['allocate', 'exit_thread', 'interrupt_main', 'start_new'], 'select': ANY, 'os': ANY, 'threading': ANY, 'builtins' if six.PY3 else '__builtin__': ANY, 'signal': ANY, } COULD_BE_MISSING = { 'socket': ['create_connection', 'RAND_add', 'RAND_egd', 'RAND_status'], 'subprocess': ['_posixsubprocess'], } # Things without an __all__ should generally be internal implementation # helpers NO_ALL = { 'gevent.threading', 'gevent._util', 'gevent._compat', 'gevent._socketcommon', 'gevent._fileobjectcommon', 'gevent._fileobjectposix', 'gevent._tblib', 'gevent._corecffi', 'gevent._patcher', 'gevent._ffi', } ALLOW_IMPLEMENTS = [ 'gevent._queue', ] # A list of modules that may contain things that aren't actually, technically, # extensions, but that need to be in __extensions__ anyway due to the way, # for example, monkey patching, needs to work. EXTRA_EXTENSIONS = [] if sys.platform.startswith('win'): EXTRA_EXTENSIONS.append('gevent.signal') class Test(unittest.TestCase): stdlib_has_all = False stdlib_all = () stdlib_name = None stdlib_module = None module = None __implements__ = __extensions__ = __imports__ = () def check_all(self): "Check that __all__ is present and does not contain invalid entries" if not hasattr(self.module, '__all__'): self.assertIn(self.modname, NO_ALL) return names = {} six.exec_("from %s import *" % self.modname, names) names.pop('__builtins__', None) self.assertEqual(sorted(names), sorted(self.module.__all__)) def check_all_formula(self): "Check __all__ = __implements__ + __extensions__ + __imported__" all_calculated = self.__implements__ + self.__imports__ + self.__extensions__ self.assertEqual(sorted(all_calculated), sorted(self.module.__all__)) def check_implements_presence_justified(self): "Check that __implements__ is present only if the module is modeled after a module from stdlib (like gevent.socket)." if self.modname in ALLOW_IMPLEMENTS: return if self.__implements__ is not None and self.stdlib_module is None: raise AssertionError('%r has __implements__ but no stdlib counterpart (%s)' % (self.modname, self.stdlib_name)) def set_stdlib_all(self): self.assertIsNotNone(self.stdlib_module) self.stdlib_has_all = True self.stdlib_all = getattr(self.stdlib_module, '__all__', None) if self.stdlib_all is None: self.stdlib_has_all = False self.stdlib_all = dir(self.stdlib_module) self.stdlib_all = [name for name in self.stdlib_all if not name.startswith('_')] self.stdlib_all = [name for name in self.stdlib_all if not isinstance(getattr(self.stdlib_module, name), types.ModuleType)] def check_implements_subset_of_stdlib_all(self): "Check that __implements__ + __imports__ is a subset of the corresponding standard module __all__ or dir()" for name in self.__implements__ + self.__imports__: if name in self.stdlib_all: continue if name in COULD_BE_MISSING.get(self.stdlib_name, ()): continue if name in dir(self.stdlib_module): # like thread._local which is not in thread.__all__ continue raise AssertionError('%r is not found in %r.__all__ nor in dir(%r)' % (name, self.stdlib_module, self.stdlib_module)) def check_implements_actually_implements(self): """Check that the module actually implements the entries from __implements__""" for name in self.__implements__: item = getattr(self.module, name) try: stdlib_item = getattr(self.stdlib_module, name) self.assertIsNot(item, stdlib_item) except AttributeError: if name not in COULD_BE_MISSING.get(self.stdlib_name, []): raise def check_imports_actually_imports(self): """Check that the module actually imports the entries from __imports__""" for name in self.__imports__: item = getattr(self.module, name) stdlib_item = getattr(self.stdlib_module, name) self.assertIs(item, stdlib_item) def check_extensions_actually_extend(self): """Check that the module actually defines new entries in __extensions__""" if self.modname in EXTRA_EXTENSIONS: return for name in self.__extensions__: if hasattr(self.stdlib_module, name): raise AssertionError("'%r' is not an extension, it is found in %r" % (name, self.stdlib_module)) def check_completeness(self): # pylint:disable=too-many-branches """Check that __all__ (or dir()) of the corresponsing stdlib is a subset of __all__ of this module""" missed = [] for name in self.stdlib_all: if name not in getattr(self.module, '__all__', []): missed.append(name) # handle stuff like ssl.socket and ssl.socket_error which have no reason to be in gevent.ssl.__all__ if not self.stdlib_has_all: for name in missed[:]: if hasattr(self.module, name): missed.remove(name) # remove known misses not_implemented = NOT_IMPLEMENTED.get(self.stdlib_name) if not_implemented is not None: result = [] for name in missed: if name in not_implemented: # We often don't want __all__ to be set because we wind up # documenting things that we just copy in from the stdlib. # But if we implement it, don't print a warning if getattr(self.module, name, self) is self: print('IncompleteImplWarning: %s.%s' % (self.modname, name)) else: result.append(name) missed = result if missed: if self.stdlib_has_all: msg = '''The following items in %r.__all__ are missing from %r: %r''' % (self.stdlib_module, self.module, missed) else: msg = '''The following items in dir(%r) are missing from %r: %r''' % (self.stdlib_module, self.module, missed) raise AssertionError(msg) def _test(self, modname): if modname.endswith(PLATFORM_SPECIFIC_SUFFIXES): return self.modname = modname with warnings.catch_warnings(): warnings.simplefilter('ignore', DeprecationWarning) self.module = importlib.import_module(modname) self.check_all() self.__implements__ = getattr(self.module, '__implements__', None) self.__imports__ = getattr(self.module, '__imports__', []) self.__extensions__ = getattr(self.module, '__extensions__', []) self.stdlib_name = MAPPING.get(modname) self.stdlib_module = None if self.stdlib_name is not None: try: self.stdlib_module = __import__(self.stdlib_name) except ImportError: pass self.check_implements_presence_justified() if self.stdlib_module is None: return # use __all__ as __implements__ if self.__implements__ is None: self.__implements__ = sorted(self.module.__all__) self.set_stdlib_all() self.check_implements_subset_of_stdlib_all() self.check_implements_actually_implements() self.check_imports_actually_imports() self.check_extensions_actually_extend() self.check_completeness() path = modname = orig_modname = None for path, modname in walk_modules(include_so=False, recursive=True): orig_modname = modname modname = modname.replace('gevent.', '').split('.')[0] if not modname: print("WARNING: No such module '%s' at '%s'" % (orig_modname, path), file=sys.stderr) continue exec( '''def test_%s(self): self._test("%s")''' % ( orig_modname.replace('.', '_').replace('-', '_'), orig_modname) ) del path, modname, orig_modname if __name__ == "__main__": unittest.main()