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# The C functions used by this module are in:
# Modules/_testcapi/module.c
import unittest
import types
from test.support import import_helper, subTests, requires_gil_enabled
# Skip this test if the _testcapi module isn't available.
_testcapi = import_helper.import_module('_testcapi')
class FakeSpec:
name = 'testmod'
DEF_SLOTS = (
'Py_mod_name', 'Py_mod_doc', 'Py_mod_state_size', 'Py_mod_methods',
'Py_mod_state_traverse', 'Py_mod_state_clear', 'Py_mod_state_free',
'Py_mod_token',
)
def def_and_token(mod):
return (
_testcapi.pymodule_get_def(mod),
_testcapi.pymodule_get_token(mod),
)
class TestModFromSlotsAndSpec(unittest.TestCase):
@requires_gil_enabled("empty slots re-enable GIL")
def test_empty(self):
mod = _testcapi.module_from_slots_empty(FakeSpec())
self.assertIsInstance(mod, types.ModuleType)
self.assertEqual(def_and_token(mod), (0, 0))
self.assertEqual(mod.__name__, 'testmod')
size = _testcapi.pymodule_get_state_size(mod)
self.assertEqual(size, 0)
def test_null_slots(self):
with self.assertRaises(SystemError):
_testcapi.module_from_slots_null(FakeSpec())
def test_none_spec(self):
# The spec currently must contain a name
with self.assertRaises(AttributeError):
_testcapi.module_from_slots_empty(None)
with self.assertRaises(AttributeError):
_testcapi.module_from_slots_name(None)
def test_name(self):
# Py_mod_name (and PyModuleDef.m_name) are currently ignored when
# spec is given.
# We still test that it's accepted.
mod = _testcapi.module_from_slots_name(FakeSpec())
self.assertIsInstance(mod, types.ModuleType)
self.assertEqual(def_and_token(mod), (0, 0))
self.assertEqual(mod.__name__, 'testmod')
self.assertEqual(mod.__doc__, None)
def test_doc(self):
mod = _testcapi.module_from_slots_doc(FakeSpec())
self.assertIsInstance(mod, types.ModuleType)
self.assertEqual(def_and_token(mod), (0, 0))
self.assertEqual(mod.__name__, 'testmod')
self.assertEqual(mod.__doc__, 'the docstring')
def test_size(self):
mod = _testcapi.module_from_slots_size(FakeSpec())
self.assertIsInstance(mod, types.ModuleType)
self.assertEqual(def_and_token(mod), (0, 0))
self.assertEqual(mod.__name__, 'testmod')
self.assertEqual(mod.__doc__, None)
size = _testcapi.pymodule_get_state_size(mod)
self.assertEqual(size, 123)
def test_methods(self):
mod = _testcapi.module_from_slots_methods(FakeSpec())
self.assertIsInstance(mod, types.ModuleType)
self.assertEqual(def_and_token(mod), (0, 0))
self.assertEqual(mod.__name__, 'testmod')
self.assertEqual(mod.__doc__, None)
self.assertEqual(mod.a_method(456), (mod, 456))
def test_gc(self):
mod = _testcapi.module_from_slots_gc(FakeSpec())
self.assertIsInstance(mod, types.ModuleType)
self.assertEqual(def_and_token(mod), (0, 0))
self.assertEqual(mod.__name__, 'testmod')
self.assertEqual(mod.__doc__, None)
# Check that the requested hook functions (which module_from_slots_gc
# stores as attributes) match what's in the module (as retrieved by
# _testinternalcapi.module_get_gc_hooks)
_testinternalcapi = import_helper.import_module('_testinternalcapi')
traverse, clear, free = _testinternalcapi.module_get_gc_hooks(mod)
self.assertEqual(traverse, mod.traverse)
self.assertEqual(clear, mod.clear)
self.assertEqual(free, mod.free)
def test_token(self):
mod = _testcapi.module_from_slots_token(FakeSpec())
self.assertIsInstance(mod, types.ModuleType)
self.assertEqual(def_and_token(mod), (0, _testcapi.module_test_token))
self.assertEqual(mod.__name__, 'testmod')
self.assertEqual(mod.__doc__, None)
def test_exec(self):
mod = _testcapi.module_from_slots_exec(FakeSpec())
self.assertIsInstance(mod, types.ModuleType)
self.assertEqual(def_and_token(mod), (0, 0))
self.assertEqual(mod.__name__, 'testmod')
self.assertEqual(mod.__doc__, None)
self.assertEqual(mod.a_number, 456)
def test_create(self):
spec = FakeSpec()
spec._gimme_this = "not a module object"
mod = _testcapi.module_from_slots_create(spec)
self.assertIsInstance(mod, str)
self.assertEqual(mod, "not a module object")
with self.assertRaises(TypeError):
_testcapi.pymodule_get_def(mod),
with self.assertRaises(TypeError):
_testcapi.pymodule_get_token(mod)
def test_def_slot(self):
"""Slots that replace PyModuleDef fields can't be used with PyModuleDef
"""
for name in DEF_SLOTS:
with self.subTest(name):
spec = FakeSpec()
spec._test_slot_id = getattr(_testcapi, name)
with self.assertRaises(SystemError) as cm:
_testcapi.module_from_def_slot(spec)
self.assertIn(name, str(cm.exception))
self.assertIn("PyModuleDef", str(cm.exception))
def test_repeated_def_slot(self):
"""Slots that replace PyModuleDef fields can't be repeated"""
for name in (*DEF_SLOTS, 'Py_mod_exec'):
with self.subTest(name):
spec = FakeSpec()
spec._test_slot_id = getattr(_testcapi, name)
with self.assertRaises(SystemError) as cm:
_testcapi.module_from_slots_repeat_slot(spec)
self.assertIn(name, str(cm.exception))
self.assertIn("more than one", str(cm.exception))
def test_null_def_slot(self):
"""Slots that replace PyModuleDef fields can't be NULL"""
for name in (*DEF_SLOTS, 'Py_mod_exec'):
with self.subTest(name):
spec = FakeSpec()
spec._test_slot_id = getattr(_testcapi, name)
with self.assertRaises(SystemError) as cm:
_testcapi.module_from_slots_null_slot(spec)
self.assertIn(name, str(cm.exception))
self.assertIn("NULL", str(cm.exception))
def test_def_multiple_exec(self):
"""PyModule_Exec runs all exec slots of PyModuleDef-defined module"""
mod = _testcapi.module_from_def_multiple_exec(FakeSpec())
self.assertFalse(hasattr(mod, 'a_number'))
_testcapi.pymodule_exec(mod)
self.assertEqual(mod.a_number, 456)
self.assertEqual(mod.another_number, 789)
_testcapi.pymodule_exec(mod)
self.assertEqual(mod.a_number, 456)
self.assertEqual(mod.another_number, -789)
def_ptr, token = def_and_token(mod)
self.assertEqual(def_ptr, token)
def test_def_token(self):
"""In PyModuleDef-defined modules, the def is the token"""
mod = _testcapi.module_from_def_multiple_exec(FakeSpec())
def_ptr, token = def_and_token(mod)
self.assertEqual(def_ptr, token)
self.assertGreater(def_ptr, 0)
@subTests('name, expected_size', [
(__name__, 0), # Python module
('_testsinglephase', -1), # single-phase init
('sys', -1),
])
def test_get_state_size(self, name, expected_size):
mod = import_helper.import_module(name)
size = _testcapi.pymodule_get_state_size(mod)
self.assertEqual(size, expected_size)
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