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gh-101758: Add a Test For Single-Phase Init Modules in Multiple Interpreters by ericsnowcurrently · Pull Request #101920 · python/cpython · GitHub
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gh-101758: Add a Test For Single-Phase Init Modules in Multiple Interpreters #101920

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Merged
ericsnowcurrently merged 6 commits into from
Feb 15, 2023
Merged

gh-101758: Add a Test For Single-Phase Init Modules in Multiple Interpreters #101920

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e062b15
Add test_imp.ImportTests.test_singlephase_multiple_interpreters.
ericsnowcurrently Feb 13, 2023
0f9a663
Add _PyImport_ClearExtension().
ericsnowcurrently Feb 15, 2023
8ea76e5
Add _testsinglephase._clear_globals().
ericsnowcurrently Feb 15, 2023
ae709db
Do not copy _testsinglephase.
ericsnowcurrently Feb 15, 2023
c5aced3
Add a check for post-load m_copy.
ericsnowcurrently Feb 15, 2023
e832631
Check attrs in m_copy.
ericsnowcurrently Feb 15, 2023
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Do not copy _testsinglephase.
  • Loading branch information
@ericsnowcurrently
ericsnowcurrently committed Feb 15, 2023
commit ae709dbb50e57107c5cda736706ae9469e2c6fd7
43 changes: 21 additions & 22 deletions Lib/test/test_imp.py
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Original file line number Diff line number Diff line change
@@ -1,12 +1,10 @@
import gc
import importlib
import importlib.util
import shutil
import os
import os.path
import py_compile
import sys
import tempfile
from test import support
from test.support import import_helper
from test.support import os_helper
Expand All @@ -17,6 +15,7 @@
import warnings
imp = warnings_helper.import_deprecated('imp')
import _imp
import _testinternalcapi
import _xxsubinterpreters as _interpreters


Expand Down Expand Up @@ -71,17 +70,6 @@ def setUp(self):
self.test_strings = mod.test_strings
self.test_path = mod.__path__

def _copy_extension(self, name):
fileobj, pathname, _ = imp.find_module('_testsinglephase')
fileobj.close()

dirname = tempfile.mkdtemp()
self.addCleanup(os_helper.rmtree, dirname)

copied = os.path.join(dirname, os.path.basename(pathname))
shutil.copyfile(pathname, copied)
return copied

# test_import_encoded_module moved to test_source_encoding.py

def test_find_module_encoding(self):
Expand Down Expand Up @@ -274,27 +262,38 @@ def test_singlephase_multiple_interpreters(self):

# This single-phase module has global state, which is shared
# by the interpreters.
name = '_testsinglephase'
filename = self._copy_extension(name)
import _testsinglephase
name = _testsinglephase.__name__
filename = _testsinglephase.__file__

del sys.modules[name]
_testsinglephase._clear_globals()
_testinternalcapi.clear_extension(name, filename)
init_count = _testsinglephase.initialized_count()
assert init_count == -1, (init_count,)

def clean_up():
_testsinglephase._clear_globals()
_testinternalcapi.clear_extension(name, filename)
self.addCleanup(clean_up)

interp1 = _interpreters.create(isolated=False)
self.addCleanup(_interpreters.destroy, interp1)
interp2 = _interpreters.create(isolated=False)
self.addCleanup(_interpreters.destroy, interp2)

script = textwrap.dedent(f'''
from test.support import warnings_helper
imp = warnings_helper.import_deprecated('imp')
module = imp.load_dynamic({name!r}, {filename!r})
import _testsinglephase

init_count = module.initialized_count()
init_count = _testsinglephase.initialized_count()
if init_count != %d:
raise Exception(init_count)

lookedup = module.look_up_self()
if lookedup is not module:
raise Exception((module, lookedup))
lookedup = _testsinglephase.look_up_self()
if lookedup is not _testsinglephase:
raise Exception((_testsinglephase, lookedup))
''')

# Use an interpreter that gets destroyed right away.
ret = support.run_in_subinterp(script % 1)
self.assertEqual(ret, 0)
Expand Down