import sys
import os
import marshal
import glob
import importlib
import importlib.util
import re
import struct
import time
import unittest
import unittest.mock

from test import support
from test.support import import_helper
from test.support import os_helper

from zipfile import ZipFile, ZipInfo, ZIP_STORED, ZIP_DEFLATED, ZIP_ZSTANDARD

import zipimport
import linecache
import doctest
import inspect
import io
from traceback import extract_tb, extract_stack, print_tb
try:
    import zlib
except ImportError:
    zlib = None

test_src = """\
def get_name():
    return __name__
def get_file():
    return __file__
"""
test_co = compile(test_src, "<???>", "exec")
raise_src = 'def do_raise(): raise TypeError\n'

def make_pyc(co, mtime, size):
    data = marshal.dumps(co)
    pyc = (importlib.util.MAGIC_NUMBER +
        struct.pack("<iLL", 0,
                    int(mtime) & 0xFFFF_FFFF, size & 0xFFFF_FFFF) + data)
    return pyc

def module_path_to_dotted_name(path):
    return path.replace(os.sep, '.')

NOW = time.time()
test_pyc = make_pyc(test_co, NOW, len(test_src))


TESTMOD = "ziptestmodule"
TESTMOD2 = "ziptestmodule2"
TESTMOD3 = "ziptestmodule3"
TESTPACK = "ziptestpackage"
TESTPACK2 = "ziptestpackage2"
TESTPACK3 = "ziptestpackage3"
TEMP_DIR = os.path.abspath("junk95142")
TEMP_ZIP = os.path.abspath("junk95142.zip")
TEST_DATA_DIR = os.path.join(os.path.dirname(__file__), "zipimport_data")

pyc_file = importlib.util.cache_from_source(TESTMOD + '.py')
pyc_ext = '.pyc'


class ImportHooksBaseTestCase(unittest.TestCase):

    def setUp(self):
        self.path = sys.path[:]
        self.meta_path = sys.meta_path[:]
        self.path_hooks = sys.path_hooks[:]
        sys.path_importer_cache.clear()
        self.modules_before = import_helper.modules_setup()

    def tearDown(self):
        sys.path[:] = self.path
        sys.meta_path[:] = self.meta_path
        sys.path_hooks[:] = self.path_hooks
        sys.path_importer_cache.clear()
        import_helper.modules_cleanup(*self.modules_before)


class UncompressedZipImportTestCase(ImportHooksBaseTestCase):

    compression = ZIP_STORED

    def setUp(self):
        # We're reusing the zip archive path, so we must clear the
        # cached directory info and linecache.
        linecache.clearcache()
        zipimport._zip_directory_cache.clear()
        ImportHooksBaseTestCase.setUp(self)

    def makeTree(self, files, dirName=TEMP_DIR):
        # Create a filesystem based set of modules/packages
        # defined by files under the directory dirName.
        self.addCleanup(os_helper.rmtree, dirName)

        for name, data in files.items():
            if isinstance(data, tuple):
                mtime, data = data
            path = os.path.join(dirName, *name.split('/'))
            if path[-1] == os.sep:
                if not os.path.isdir(path):
                    os.makedirs(path)
            else:
                dname = os.path.dirname(path)
                if not os.path.isdir(dname):
                    os.makedirs(dname)
                with open(path, 'wb') as fp:
                    fp.write(data)

    def makeZip(self, files, zipName=TEMP_ZIP, *,
                comment=None, file_comment=None, stuff=None, prefix='', **kw):
        # Create a zip archive based set of modules/packages
        # defined by files in the zip file zipName.
        # If stuff is not None, it is prepended to the archive.
        self.addCleanup(os_helper.unlink, zipName)

        with ZipFile(zipName, "w", compression=self.compression) as z:
            self.writeZip(z, files, file_comment=file_comment, prefix=prefix)
            if comment is not None:
                z.comment = comment

        if stuff is not None:
            # Prepend 'stuff' to the start of the zipfile
            with open(zipName, "rb") as f:
                data = f.read()
            with open(zipName, "wb") as f:
                f.write(stuff)
                f.write(data)

    def writeZip(self, z, files, *, file_comment=None, prefix=''):
        for name, data in files.items():
            if isinstance(data, tuple):
                mtime, data = data
            else:
                mtime = NOW
            name = name.replace(os.sep, '/')
            zinfo = ZipInfo(prefix + name, time.localtime(mtime))
            zinfo.compress_type = self.compression
            if file_comment is not None:
                zinfo.comment = file_comment
            if data is None:
                zinfo.CRC = 0
                z.mkdir(zinfo)
            else:
                assert name[-1] != '/'
                z.writestr(zinfo, data)

    def getZip64Files(self):
        # This is the simplest way to make zipfile generate the zip64 EOCD block
        return {f"f{n}.py": test_src for n in range(65537)}

    def doTest(self, expected_ext, files, *modules, **kw):
        if 'prefix' not in kw:
            kw['prefix'] = 'pre/fix/'
        self.makeZip(files, **kw)
        self.doTestWithPreBuiltZip(expected_ext, *modules, **kw)

    def doTestWithPreBuiltZip(self, expected_ext, *modules,
                              call=None, prefix='', **kw):
        zip_path = os.path.join(TEMP_ZIP, *prefix.split('/')[:-1])
        sys.path.insert(0, zip_path)

        mod = importlib.import_module(".".join(modules))

        if call is not None:
            call(mod)

        if expected_ext:
            file = mod.get_file()
            self.assertEqual(file, os.path.join(zip_path,
                                 *modules) + expected_ext)

    def testAFakeZlib(self):
        #
        # This could cause a stack overflow before: importing zlib.py
        # from a compressed archive would cause zlib to be imported
        # which would find zlib.py in the archive, which would... etc.
        #
        # This test *must* be executed first: it must be the first one
        # to trigger zipimport to import zlib (zipimport caches the
        # zlib.decompress function object, after which the problem being
        # tested here wouldn't be a problem anymore...
        # (Hence the 'A' in the test method name: to make it the first
        # item in a list sorted by name, like
        # unittest.TestLoader.getTestCaseNames() does.)
        #
        # This test fails on platforms on which the zlib module is
        # statically linked, but the problem it tests for can't
        # occur in that case (builtin modules are always found first),
        # so we'll simply skip it then. Bug #765456.
        #
        if self.compression == ZIP_DEFLATED:
            mod_name = "zlib"
            if zipimport._zlib_decompress:  # validate attr name
                # reset the cached import to avoid test order dependencies
                zipimport._zlib_decompress = None  # reset cache
        elif self.compression == ZIP_ZSTANDARD:
            mod_name = "_zstd"
            if zipimport._zstd_decompressor_class:  # validate attr name
                # reset the cached import to avoid test order dependencies
                zipimport._zstd_decompressor_class = None
        else:
            mod_name = "zlib"  # the ZIP_STORED case below

        if mod_name in sys.builtin_module_names:
            self.skipTest(f"{mod_name} is a builtin module")
        if mod_name in sys.modules:
            del sys.modules[mod_name]
        files = {f"{mod_name}.py": test_src}
        try:
            self.doTest(".py", files, mod_name)
        except ImportError:
            if self.compression != ZIP_STORED:
                # Expected - fake compression module can't decompress
                pass
            else:
                self.fail("expected test to not raise ImportError for uncompressed")
        else:
            if self.compression == ZIP_STORED:
                # Expected - no compression needed, so fake module works
                pass
            else:
                self.fail("expected test to raise ImportError for compressed zip with fake compression module")

    def testPy(self):
        files = {TESTMOD + ".py": test_src}
        self.doTest(".py", files, TESTMOD)

    def testPyc(self):
        files = {TESTMOD + pyc_ext: test_pyc}
        self.doTest(pyc_ext, files, TESTMOD)

    def testBoth(self):
        files = {TESTMOD + ".py": test_src,
                 TESTMOD + pyc_ext: test_pyc}
        self.doTest(pyc_ext, files, TESTMOD)

    def testUncheckedHashBasedPyc(self):
        source = b"state = 'old'"
        source_hash = importlib.util.source_hash(source)
        bytecode = importlib._bootstrap_external._code_to_hash_pyc(
            compile(source, "???", "exec"),
            source_hash,
            False, # unchecked
        )
        files = {TESTMOD + ".py": (NOW, "state = 'new'"),
                 TESTMOD + ".pyc": (NOW - 20, bytecode)}
        def check(mod):
            self.assertEqual(mod.state, 'old')
        self.doTest(None, files, TESTMOD, call=check)

    @unittest.mock.patch('_imp.check_hash_based_pycs', 'always')
    def test_checked_hash_based_change_pyc(self):
        source = b"state = 'old'"
        source_hash = importlib.util.source_hash(source)
        bytecode = importlib._bootstrap_external._code_to_hash_pyc(
            compile(source, "???", "exec"),
            source_hash,
            False,
        )
        files = {TESTMOD + ".py": (NOW, "state = 'new'"),
                 TESTMOD + ".pyc": (NOW - 20, bytecode)}
        def check(mod):
            self.assertEqual(mod.state, 'new')
        self.doTest(None, files, TESTMOD, call=check)

    def testEmptyPy(self):
        files = {TESTMOD + ".py": ""}
        self.doTest(None, files, TESTMOD)

    def testBadMagic(self):
        # make pyc magic word invalid, forcing loading from .py
        badmagic_pyc = bytearray(test_pyc)
        badmagic_pyc[0] ^= 0x04  # flip an arbitrary bit
        files = {TESTMOD + ".py": test_src,
                 TESTMOD + pyc_ext: badmagic_pyc}
        self.doTest(".py", files, TESTMOD)

    def testBadMagic2(self):
        # make pyc magic word invalid, causing an ImportError
        badmagic_pyc = bytearray(test_pyc)
        badmagic_pyc[0] ^= 0x04  # flip an arbitrary bit
        files = {TESTMOD + pyc_ext: badmagic_pyc}
        try:
            self.doTest(".py", files, TESTMOD)
            self.fail("This should not be reached")
        except zipimport.ZipImportError as exc:
            self.assertIsInstance(exc.__cause__, ImportError)
            self.assertIn("magic number", exc.__cause__.msg)

    def testBadMTime(self):
        badtime_pyc = bytearray(test_pyc)
        # flip the second bit -- not the first as that one isn't stored in the
        # .py's mtime in the zip archive.
        badtime_pyc[11] ^= 0x02
        files = {TESTMOD + ".py": test_src,
                 TESTMOD + pyc_ext: badtime_pyc}
        self.doTest(".py", files, TESTMOD)

    def test2038MTime(self):
        # Make sure we can handle mtimes larger than what a 32-bit signed number
        # can hold.
        twenty_thirty_eight_pyc = make_pyc(test_co, 2**32 - 1, len(test_src))
        files = {TESTMOD + ".py": test_src,
                 TESTMOD + pyc_ext: twenty_thirty_eight_pyc}
        self.doTest(".py", files, TESTMOD)

    def testPackage(self):
        packdir = TESTPACK + os.sep
        files = {packdir + "__init__" + pyc_ext: test_pyc,
                 packdir + TESTMOD + pyc_ext: test_pyc}
        self.doTest(pyc_ext, files, TESTPACK, TESTMOD)

    def testSubPackage(self):
        # Test that subpackages function when loaded from zip
        # archives.
        packdir = TESTPACK + os.sep
        packdir2 = packdir + TESTPACK2 + os.sep
        files = {packdir + "__init__" + pyc_ext: test_pyc,
                 packdir2 + "__init__" + pyc_ext: test_pyc,
                 packdir2 + TESTMOD + pyc_ext: test_pyc}
        self.doTest(pyc_ext, files, TESTPACK, TESTPACK2, TESTMOD)

    def testSubNamespacePackage(self):
        # Test that implicit namespace subpackages function
        # when loaded from zip archives.
        packdir = TESTPACK + os.sep
        packdir2 = packdir + TESTPACK2 + os.sep
        # The first two files are just directory entries (so have no data).
        files = {packdir: None,
                 packdir2: None,
                 packdir2 + TESTMOD + pyc_ext: test_pyc}
        self.doTest(pyc_ext, files, TESTPACK, TESTPACK2, TESTMOD)

    def testPackageExplicitDirectories(self):
        # Test explicit namespace packages with explicit directory entries.
        self.addCleanup(os_helper.unlink, TEMP_ZIP)
        with ZipFile(TEMP_ZIP, 'w', compression=self.compression) as z:
            z.mkdir('a')
            z.writestr('a/__init__.py', test_src)
            z.mkdir('a/b')
            z.writestr('a/b/__init__.py', test_src)
            z.mkdir('a/b/c')
            z.writestr('a/b/c/__init__.py', test_src)
            z.writestr('a/b/c/d.py', test_src)
        self._testPackage(initfile='__init__.py')

    def testPackageImplicitDirectories(self):
        # Test explicit namespace packages without explicit directory entries.
        self.addCleanup(os_helper.unlink, TEMP_ZIP)
        with ZipFile(TEMP_ZIP, 'w', compression=self.compression) as z:
            z.writestr('a/__init__.py', test_src)
            z.writestr('a/b/__init__.py', test_src)
            z.writestr('a/b/c/__init__.py', test_src)
            z.writestr('a/b/c/d.py', test_src)
        self._testPackage(initfile='__init__.py')

    def testNamespacePackageExplicitDirectories(self):
        # Test implicit namespace packages with explicit directory entries.
        self.addCleanup(os_helper.unlink, TEMP_ZIP)
        with ZipFile(TEMP_ZIP, 'w', compression=self.compression) as z:
            z.mkdir('a')
            z.mkdir('a/b')
            z.mkdir('a/b/c')
            z.writestr('a/b/c/d.py', test_src)
        self._testPackage(initfile=None)

    def testNamespacePackageImplicitDirectories(self):
        # Test implicit namespace packages without explicit directory entries.
        self.addCleanup(os_helper.unlink, TEMP_ZIP)
        with ZipFile(TEMP_ZIP, 'w', compression=self.compression) as z:
            z.writestr('a/b/c/d.py', test_src)
        self._testPackage(initfile=None)

    def _testPackage(self, initfile):
        zi = zipimport.zipimporter(os.path.join(TEMP_ZIP, 'a'))
        if initfile is None:
            # XXX Should it work?
            self.assertRaises(zipimport.ZipImportError, zi.is_package, 'b')
            self.assertRaises(zipimport.ZipImportError, zi.get_source, 'b')
            self.assertRaises(zipimport.ZipImportError, zi.get_code, 'b')
        else:
            self.assertTrue(zi.is_package('b'))
            self.assertEqual(zi.get_source('b'), test_src)
            self.assertEqual(zi.get_code('b').co_filename,
                             os.path.join(TEMP_ZIP, 'a', 'b', initfile))

        sys.path.insert(0, TEMP_ZIP)
        self.assertNotIn('a', sys.modules)

        mod = importlib.import_module(f'a.b')
        self.assertIn('a', sys.modules)
        self.assertIs(sys.modules['a.b'], mod)
        if initfile is None:
            self.assertIsNone(mod.__file__)
        else:
            self.assertEqual(mod.__file__,
                             os.path.join(TEMP_ZIP, 'a', 'b', initfile))
        self.assertEqual(len(mod.__path__), 1, mod.__path__)
        self.assertEqual(mod.__path__[0], os.path.join(TEMP_ZIP, 'a', 'b'))

        mod2 = importlib.import_module(f'a.b.c.d')
        self.assertIn('a.b.c', sys.modules)
        self.assertIn('a.b.c.d', sys.modules)
        self.assertIs(sys.modules['a.b.c.d'], mod2)
        self.assertIs(mod.c.d, mod2)
        self.assertEqual(mod2.__file__,
                         os.path.join(TEMP_ZIP, 'a', 'b', 'c', 'd.py'))

    def testMixedNamespacePackage(self):
        # Test implicit namespace packages spread between a
        # real filesystem and a zip archive.
        packdir = TESTPACK + os.sep
        packdir2 = packdir + TESTPACK2 + os.sep
        packdir3 = packdir2 + TESTPACK3 + os.sep
        files1 = {packdir: None,
                  packdir + TESTMOD + pyc_ext: test_pyc,
                  packdir2: None,
                  packdir3: None,
                  packdir3 + TESTMOD + pyc_ext: test_pyc,
                  packdir2 + TESTMOD3 + pyc_ext: test_pyc,
                  packdir2 + TESTMOD + pyc_ext: test_pyc}
        files2 = {packdir: None,
                  packdir + TESTMOD2 + pyc_ext: test_pyc,
                  packdir2: None,
                  packdir2 + TESTMOD2 + pyc_ext: test_pyc,
                  packdir2 + TESTMOD + pyc_ext: test_pyc}

        zip1 = os.path.abspath("path1.zip")
        self.makeZip(files1, zip1)

        zip2 = TEMP_DIR
        self.makeTree(files2, zip2)

        # zip2 should override zip1.
        sys.path.insert(0, zip1)
        sys.path.insert(0, zip2)

        mod = importlib.import_module(TESTPACK)

        # if TESTPACK is functioning as a namespace pkg then
        # there should be two entries in the __path__.
        # First should be path2 and second path1.
        self.assertEqual(2, len(mod.__path__))
        p1, p2 = mod.__path__
        self.assertEqual(os.path.basename(TEMP_DIR), p1.split(os.sep)[-2])
        self.assertEqual("path1.zip", p2.split(os.sep)[-2])

        # packdir3 should import as a namespace package.
        # Its __path__ is an iterable of 1 element from zip1.
        mod = importlib.import_module(packdir3.replace(os.sep, '.')[:-1])
        self.assertEqual(1, len(mod.__path__))
        mpath = list(mod.__path__)[0].split('path1.zip' + os.sep)[1]
        self.assertEqual(packdir3[:-1], mpath)

        # TESTPACK/TESTMOD only exists in path1.
        mod = importlib.import_module('.'.join((TESTPACK, TESTMOD)))
        self.assertEqual("path1.zip", mod.__file__.split(os.sep)[-3])

        # And TESTPACK/(TESTMOD2) only exists in path2.
        mod = importlib.import_module('.'.join((TESTPACK, TESTMOD2)))
        self.assertEqual(os.path.basename(TEMP_DIR),
                         mod.__file__.split(os.sep)[-3])

        # One level deeper...
        subpkg = '.'.join((TESTPACK, TESTPACK2))
        mod = importlib.import_module(subpkg)
        self.assertEqual(2, len(mod.__path__))
        p1, p2 = mod.__path__
        self.assertEqual(os.path.basename(TEMP_DIR), p1.split(os.sep)[-3])
        self.assertEqual("path1.zip", p2.split(os.sep)[-3])

        # subpkg.TESTMOD exists in both zips should load from zip2.
        mod = importlib.import_module('.'.join((subpkg, TESTMOD)))
        self.assertEqual(os.path.basename(TEMP_DIR),
                         mod.__file__.split(os.sep)[-4])

        # subpkg.TESTMOD2 only exists in zip2.
        mod = importlib.import_module('.'.join((subpkg, TESTMOD2)))
        self.assertEqual(os.path.basename(TEMP_DIR),
                         mod.__file__.split(os.sep)[-4])

        # Finally subpkg.TESTMOD3 only exists in zip1.
        mod = importlib.import_module('.'.join((subpkg, TESTMOD3)))
        self.assertEqual('path1.zip', mod.__file__.split(os.sep)[-4])

    def testNamespacePackage(self):
        # Test implicit namespace packages spread between multiple zip
        # archives.
        packdir = TESTPACK + os.sep
        packdir2 = packdir + TESTPACK2 + os.sep
        packdir3 = packdir2 + TESTPACK3 + os.sep
        files1 = {packdir: None,
                  packdir + TESTMOD + pyc_ext: test_pyc,
                  packdir2: None,
                  packdir3: None,
                  packdir3 + TESTMOD + pyc_ext: test_pyc,
                  packdir2 + TESTMOD3 + pyc_ext: test_pyc,
                  packdir2 + TESTMOD + pyc_ext: test_pyc}
        zip1 = os.path.abspath("path1.zip")
        self.makeZip(files1, zip1)

        files2 = {packdir: None,
                  packdir + TESTMOD2 + pyc_ext: test_pyc,
                  packdir2: None,
                  packdir2 + TESTMOD2 + pyc_ext: test_pyc,
                  packdir2 + TESTMOD + pyc_ext: test_pyc}
        zip2 = os.path.abspath("path2.zip")
        self.makeZip(files2, zip2)

        # zip2 should override zip1.
        sys.path.insert(0, zip1)
        sys.path.insert(0, zip2)

        mod = importlib.import_module(TESTPACK)

        # if TESTPACK is functioning as a namespace pkg then
        # there should be two entries in the __path__.
        # First should be path2 and second path1.
        self.assertEqual(2, len(mod.__path__))
        p1, p2 = mod.__path__
        self.assertEqual("path2.zip", p1.split(os.sep)[-2])
        self.assertEqual("path1.zip", p2.split(os.sep)[-2])

        # packdir3 should import as a namespace package.
        # Tts __path__ is an iterable of 1 element from zip1.
        mod = importlib.import_module(packdir3.replace(os.sep, '.')[:-1])
        self.assertEqual(1, len(mod.__path__))
        mpath = list(mod.__path__)[0].split('path1.zip' + os.sep)[1]
        self.assertEqual(packdir3[:-1], mpath)

        # TESTPACK/TESTMOD only exists in path1.
        mod = importlib.import_module('.'.join((TESTPACK, TESTMOD)))
        self.assertEqual("path1.zip", mod.__file__.split(os.sep)[-3])

        # And TESTPACK/(TESTMOD2) only exists in path2.
        mod = importlib.import_module('.'.join((TESTPACK, TESTMOD2)))
        self.assertEqual("path2.zip", mod.__file__.split(os.sep)[-3])

        # One level deeper...
        subpkg = '.'.join((TESTPACK, TESTPACK2))
        mod = importlib.import_module(subpkg)
        self.assertEqual(2, len(mod.__path__))
        p1, p2 = mod.__path__
        self.assertEqual("path2.zip", p1.split(os.sep)[-3])
        self.assertEqual("path1.zip", p2.split(os.sep)[-3])

        # subpkg.TESTMOD exists in both zips should load from zip2.
        mod = importlib.import_module('.'.join((subpkg, TESTMOD)))
        self.assertEqual('path2.zip', mod.__file__.split(os.sep)[-4])

        # subpkg.TESTMOD2 only exists in zip2.
        mod = importlib.import_module('.'.join((subpkg, TESTMOD2)))
        self.assertEqual('path2.zip', mod.__file__.split(os.sep)[-4])

        # Finally subpkg.TESTMOD3 only exists in zip1.
        mod = importlib.import_module('.'.join((subpkg, TESTMOD3)))
        self.assertEqual('path1.zip', mod.__file__.split(os.sep)[-4])

    def testZipImporterMethods(self):
        packdir = TESTPACK + os.sep
        packdir2 = packdir + TESTPACK2 + os.sep
        files = {packdir + "__init__" + pyc_ext: test_pyc,
                 packdir2 + "__init__" + pyc_ext: test_pyc,
                 packdir2 + TESTMOD + pyc_ext: test_pyc,
                 "spam" + pyc_ext: test_pyc}
        self.makeZip(files, file_comment=b"spam")

        zi = zipimport.zipimporter(TEMP_ZIP)
        self.assertEqual(zi.archive, TEMP_ZIP)
        self.assertTrue(zi.is_package(TESTPACK))

        # PEP 451
        spec = zi.find_spec('spam')
        self.assertIsNotNone(spec)
        self.assertIsInstance(spec.loader, zipimport.zipimporter)
        self.assertFalse(spec.loader.is_package('spam'))
        exec_mod = importlib.util.module_from_spec(spec)
        spec.loader.exec_module(exec_mod)
        self.assertEqual(spec.loader.get_filename('spam'), exec_mod.__file__)

        spec = zi.find_spec(TESTPACK)
        mod = importlib.util.module_from_spec(spec)
        spec.loader.exec_module(mod)
        self.assertEqual(zi.get_filename(TESTPACK), mod.__file__)

        sys.path.insert(0, TEMP_ZIP)

        existing_pack_path = importlib.import_module(TESTPACK).__path__[0]
        expected_path_path = os.path.join(TEMP_ZIP, TESTPACK)
        self.assertEqual(existing_pack_path, expected_path_path)

        self.assertFalse(zi.is_package(packdir + '__init__'))
        self.assertTrue(zi.is_package(packdir + TESTPACK2))
        self.assertFalse(zi.is_package(packdir2 + TESTMOD))

        mod_path = packdir2 + TESTMOD
        mod_name = module_path_to_dotted_name(mod_path)
        mod = importlib.import_module(mod_name)
        self.assertTrue(mod_name in sys.modules)
        self.assertIsNone(zi.get_source(TESTPACK))
        self.assertIsNone(zi.get_source(mod_path))
        self.assertEqual(zi.get_filename(mod_path), mod.__file__)
        # To pass in the module name instead of the path, we must use the
        # right importer
        loader = mod.__spec__.loader
        self.assertIsNone(loader.get_source(mod_name))
        self.assertEqual(loader.get_filename(mod_name), mod.__file__)

        # test prefix and archivepath members
        zi2 = zipimport.zipimporter(TEMP_ZIP + os.sep + TESTPACK)
        self.assertEqual(zi2.archive, TEMP_ZIP)
        self.assertEqual(zi2.prefix, TESTPACK + os.sep)

    def testInvalidateCaches(self):
        packdir = TESTPACK + os.sep
        packdir2 = packdir + TESTPACK2 + os.sep
        files = {packdir + "__init__" + pyc_ext: test_pyc,
                 packdir2 + "__init__" + pyc_ext: test_pyc,
                 packdir2 + TESTMOD + pyc_ext: test_pyc,
                 "spam" + pyc_ext: test_pyc}
        extra_files = [packdir, packdir2]
        self.makeZip(files, file_comment=b"spam")

        zi = zipimport.zipimporter(TEMP_ZIP)
        self.assertEqual(sorted(zi._get_files()), sorted([*files, *extra_files]))
        # Check that the file information remains accurate after reloading
        zi.invalidate_caches()
        self.assertEqual(sorted(zi._get_files()), sorted([*files, *extra_files]))
        # Add a new file to the ZIP archive
        newfile = {"spam2" + pyc_ext: test_pyc}
        files.update(newfile)
        with ZipFile(TEMP_ZIP, "a", compression=self.compression) as z:
            self.writeZip(z, newfile, file_comment=b"spam")
        # Check that we can detect the new file after invalidating the cache
        zi.invalidate_caches()
        self.assertEqual(sorted(zi._get_files()), sorted([*files, *extra_files]))
        spec = zi.find_spec('spam2')
        self.assertIsNotNone(spec)
        self.assertIsInstance(spec.loader, zipimport.zipimporter)
        # Check that the cached data is removed if the file is deleted
        os.remove(TEMP_ZIP)
        zi.invalidate_caches()
        self.assertFalse(zi._get_files())
        self.assertIsNone(zipimport._zip_directory_cache.get(zi.archive))
        self.assertIsNone(zi.find_spec("name_does_not_matter"))

    def testInvalidateCachesWithMultipleZipimports(self):
        packdir = TESTPACK + os.sep
        packdir2 = packdir + TESTPACK2 + os.sep
        files = {packdir + "__init__" + pyc_ext: test_pyc,
                 packdir2 + "__init__" + pyc_ext: test_pyc,
                 packdir2 + TESTMOD + pyc_ext: test_pyc,
                 "spam" + pyc_ext: test_pyc}
        extra_files = [packdir, packdir2]
        self.makeZip(files, file_comment=b"spam")

        zi = zipimport.zipimporter(TEMP_ZIP)
        self.assertEqual(sorted(zi._get_files()), sorted([*files, *extra_files]))
        # Zipimporter for the same path.
        zi2 = zipimport.zipimporter(TEMP_ZIP)
        self.assertEqual(sorted(zi2._get_files()), sorted([*files, *extra_files]))
        # Add a new file to the ZIP archive to make the cache wrong.
        newfile = {"spam2" + pyc_ext: test_pyc}
        files.update(newfile)
        with ZipFile(TEMP_ZIP, "a", compression=self.compression) as z:
            self.writeZip(z, newfile, file_comment=b"spam")
        # Invalidate the cache of the first zipimporter.
        zi.invalidate_caches()
        # Check that the second zipimporter detects the new file and isn't using a stale cache.
        self.assertEqual(sorted(zi2._get_files()), sorted([*files, *extra_files]))
        spec = zi2.find_spec('spam2')
        self.assertIsNotNone(spec)
        self.assertIsInstance(spec.loader, zipimport.zipimporter)

    def testZipImporterMethodsInSubDirectory(self):
        packdir = TESTPACK + os.sep
        packdir2 = packdir + TESTPACK2 + os.sep
        files = {packdir2 + "__init__" + pyc_ext: test_pyc,
                 packdir2 + TESTMOD + pyc_ext: test_pyc}
        self.makeZip(files, file_comment=b"eggs")

        zi = zipimport.zipimporter(TEMP_ZIP + os.sep + packdir)
        self.assertEqual(zi.archive, TEMP_ZIP)
        self.assertEqual(zi.prefix, packdir)
        self.assertTrue(zi.is_package(TESTPACK2))
        # PEP 451
        spec = zi.find_spec(TESTPACK2)
        mod = importlib.util.module_from_spec(spec)
        spec.loader.exec_module(mod)
        self.assertEqual(spec.loader.get_filename(TESTPACK2), mod.__file__)

        self.assertFalse(zi.is_package(TESTPACK2 + os.sep + '__init__'))
        self.assertFalse(zi.is_package(TESTPACK2 + os.sep + TESTMOD))

        pkg_path = TEMP_ZIP + os.sep + packdir + TESTPACK2
        zi2 = zipimport.zipimporter(pkg_path)

        # PEP 451
        spec = zi2.find_spec(TESTMOD)
        self.assertIsNotNone(spec)
        self.assertIsInstance(spec.loader, zipimport.zipimporter)
        self.assertFalse(spec.loader.is_package(TESTMOD))
        load_mod = importlib.util.module_from_spec(spec)
        spec.loader.exec_module(load_mod)
        self.assertEqual(
            spec.loader.get_filename(TESTMOD), load_mod.__file__)

        sys.path.insert(0, TEMP_ZIP + os.sep + TESTPACK)

        mod_path = TESTPACK2 + os.sep + TESTMOD
        mod_name = module_path_to_dotted_name(mod_path)
        mod = importlib.import_module(mod_name)

        self.assertTrue(mod_name in sys.modules)
        self.assertIsNone(zi.get_source(TESTPACK2))
        self.assertIsNone(zi.get_source(mod_path))
        self.assertEqual(zi.get_filename(mod_path), mod.__file__)
        # To pass in the module name instead of the path, we must use the
        # right importer.
        loader = mod.__loader__
        self.assertIsNone(loader.get_source(mod_name))
        self.assertEqual(loader.get_filename(mod_name), mod.__file__)

    def testGetDataExplicitDirectories(self):
        self.addCleanup(os_helper.unlink, TEMP_ZIP)
        with ZipFile(TEMP_ZIP, 'w', compression=self.compression) as z:
            z.mkdir('a')
            z.mkdir('a/b')
            z.mkdir('a/b/c')
            data = bytes(range(256))
            z.writestr('a/b/c/testdata.dat', data)
        self._testGetData()

    def testGetDataImplicitDirectories(self):
        self.addCleanup(os_helper.unlink, TEMP_ZIP)
        with ZipFile(TEMP_ZIP, 'w', compression=self.compression) as z:
            data = bytes(range(256))
            z.writestr('a/b/c/testdata.dat', data)
        self._testGetData()

    def _testGetData(self):
        zi = zipimport.zipimporter(os.path.join(TEMP_ZIP, 'ignored'))
        pathname = os.path.join('a', 'b', 'c', 'testdata.dat')
        data = bytes(range(256))
        self.assertEqual(zi.get_data(pathname), data)
        self.assertEqual(zi.get_data(os.path.join(TEMP_ZIP, pathname)), data)
        self.assertEqual(zi.get_data(os.path.join('a', 'b', '')), b'')
        self.assertEqual(zi.get_data(os.path.join(TEMP_ZIP, 'a', 'b', '')), b'')
        self.assertRaises(OSError, zi.get_data, os.path.join('a', 'b'))
        self.assertRaises(OSError, zi.get_data, os.path.join(TEMP_ZIP, 'a', 'b'))

    def testImporterAttr(self):
        src = """if 1:  # indent hack
        def get_file():
            return __file__
        if __loader__.get_data("some.data") != b"some data":
            raise AssertionError("bad data")\n"""
        pyc = make_pyc(compile(src, "<???>", "exec"), NOW, len(src))
        files = {TESTMOD + pyc_ext: pyc,
                 "some.data": "some data"}
        self.doTest(pyc_ext, files, TESTMOD, prefix='')

    def testDefaultOptimizationLevel(self):
        # zipimport should use the default optimization level (#28131)
        src = """if 1:  # indent hack
        def test(val):
            assert(val)
            return val\n"""
        files = {TESTMOD + '.py': src}
        self.makeZip(files)
        sys.path.insert(0, TEMP_ZIP)
        mod = importlib.import_module(TESTMOD)
        self.assertEqual(mod.test(1), 1)
        if __debug__:
            self.assertRaises(AssertionError, mod.test, False)
        else:
            self.assertEqual(mod.test(0), 0)

    def testImport_WithStuff(self):
        # try importing from a zipfile which contains additional
        # stuff at the beginning of the file
        files = {TESTMOD + ".py": test_src}
        self.doTest(".py", files, TESTMOD,
                    stuff=b"Some Stuff"*31)

    def assertModuleSource(self, module):
        self.assertEqual(inspect.getsource(module), test_src)

    def testGetSource(self):
        files = {TESTMOD + ".py": test_src}
        self.doTest(".py", files, TESTMOD, call=self.assertModuleSource)

    def testGetCompiledSource(self):
        pyc = make_pyc(compile(test_src, "<???>", "exec"), NOW, len(test_src))
        files = {TESTMOD + ".py": test_src,
                 TESTMOD + pyc_ext: pyc}
        self.doTest(pyc_ext, files, TESTMOD, call=self.assertModuleSource)

    def runDoctest(self, callback):
        files = {TESTMOD + ".py": test_src,
                 "xyz.txt": ">>> log.append(True)\n"}
        self.doTest(".py", files, TESTMOD, call=callback)

    def doDoctestFile(self, module):
        log = []
        old_master, doctest.master = doctest.master, None
        try:
            doctest.testfile(
                'xyz.txt', package=module, module_relative=True,
                globs=locals()
            )
        finally:
            doctest.master = old_master
        self.assertEqual(log,[True])

    def testDoctestFile(self):
        self.runDoctest(self.doDoctestFile)

    def doDoctestSuite(self, module):
        log = []
        doctest.DocFileTest(
            'xyz.txt', package=module, module_relative=True,
            globs=locals()
        ).run()
        self.assertEqual(log,[True])

    def testDoctestSuite(self):
        self.runDoctest(self.doDoctestSuite)

    def doTraceback(self, module):
        try:
            module.do_raise()
        except Exception as e:
            tb = e.__traceback__.tb_next

            f,lno,n,line = extract_tb(tb, 1)[0]
            self.assertEqual(line, raise_src.strip())

            f,lno,n,line = extract_stack(tb.tb_frame, 1)[0]
            self.assertEqual(line, raise_src.strip())

            s = io.StringIO()
            print_tb(tb, 1, s)
            self.assertEndsWith(s.getvalue(),
                '    def do_raise(): raise TypeError\n'
                '' if support.has_no_debug_ranges() else
                '                    ^^^^^^^^^^^^^^^\n'
            )
        else:
            raise AssertionError("This ought to be impossible")

    def testTraceback(self):
        files = {TESTMOD + ".py": raise_src}
        self.doTest(None, files, TESTMOD, call=self.doTraceback)

    @unittest.skipIf(os_helper.TESTFN_UNENCODABLE is None,
                     "need an unencodable filename")
    def testUnencodable(self):
        filename = os_helper.TESTFN_UNENCODABLE + ".zip"
        self.makeZip({TESTMOD + ".py": test_src}, filename)
        spec = zipimport.zipimporter(filename).find_spec(TESTMOD)
        mod = importlib.util.module_from_spec(spec)
        spec.loader.exec_module(mod)

    def testBytesPath(self):
        filename = os_helper.TESTFN + ".zip"
        self.makeZip({TESTMOD + ".py": test_src}, filename)

        zipimport.zipimporter(filename)
        with self.assertRaises(TypeError):
            zipimport.zipimporter(os.fsencode(filename))
        with self.assertRaises(TypeError):
            zipimport.zipimporter(bytearray(os.fsencode(filename)))
        with self.assertRaises(TypeError):
            zipimport.zipimporter(memoryview(os.fsencode(filename)))

    def testComment(self):
        files = {TESTMOD + ".py": test_src}
        self.doTest(".py", files, TESTMOD, comment=b"comment")

    def testBeginningCruftAndComment(self):
        files = {TESTMOD + ".py": test_src}
        self.doTest(".py", files, TESTMOD, stuff=b"cruft" * 64, comment=b"hi")

    def testLargestPossibleComment(self):
        files = {TESTMOD + ".py": test_src}
        self.doTest(".py", files, TESTMOD, comment=b"c" * ((1 << 16) - 1))

    @support.requires_resource('cpu')
    def testZip64(self):
        files = self.getZip64Files()
        self.doTest(".py", files, "f6")

    @support.requires_resource('cpu')
    def testZip64CruftAndComment(self):
        files = self.getZip64Files()
        self.doTest(".py", files, "f65536", comment=b"c" * ((1 << 16) - 1))

    def testZip64LargeFile(self):
        support.requires(
            "largefile",
            f"test generates files >{0xFFFFFFFF} bytes and takes a long time "
            "to run"
        )

        # N.B.: We do a lot of gymnastics below in the ZIP_STORED case to save
        # and reconstruct a sparse zip on systems that support sparse files.
        # Instead of creating a ~8GB zip file mainly consisting of null bytes
        # for every run of the test, we create the zip once and save off the
        # non-null portions of the resulting file as data blobs with offsets
        # that allow re-creating the zip file sparsely. This drops disk space
        # usage to ~9KB for the ZIP_STORED case and drops that test time by ~2
        # orders of magnitude. For the ZIP_DEFLATED case, however, we bite the
        # bullet. The resulting zip file is ~8MB of non-null data; so the sparse
        # trick doesn't work and would result in that full ~8MB zip data file
        # being checked in to source control.
        parts_glob = f"sparse-zip64-c{self.compression:d}-0x*.part"
        full_parts_glob = os.path.join(TEST_DATA_DIR, parts_glob)
        pre_built_zip_parts = glob.glob(full_parts_glob)

        self.addCleanup(os_helper.unlink, TEMP_ZIP)
        if not pre_built_zip_parts:
            if self.compression != ZIP_STORED:
                support.requires(
                    "cpu",
                    "test requires a lot of CPU for compression."
                )
            self.addCleanup(os_helper.unlink, os_helper.TESTFN)
            with open(os_helper.TESTFN, "wb") as f:
                f.write(b"data")
                f.write(os.linesep.encode())
                f.seek(0xffff_ffff, os.SEEK_CUR)
                f.write(os.linesep.encode())
            os.utime(os_helper.TESTFN, (0.0, 0.0))
            with ZipFile(
                TEMP_ZIP,
                "w",
                compression=self.compression,
                strict_timestamps=False
            ) as z:
                z.write(os_helper.TESTFN, "data1")
                z.writestr(
                    ZipInfo("module.py", (1980, 1, 1, 0, 0, 0)), test_src
                )
                z.write(os_helper.TESTFN, "data2")

            # This "works" but relies on the zip format having a non-empty
            # final page due to the trailing central directory to wind up with
            # the correct length file.
            def make_sparse_zip_parts(name):
                empty_page = b"\0" * 4096
                with open(name, "rb") as f:
                    part = None
                    try:
                        while True:
                            offset = f.tell()
                            data = f.read(len(empty_page))
                            if not data:
                                break
                            if data != empty_page:
                                if not part:
                                    part_fullname = os.path.join(
                                        TEST_DATA_DIR,
                                        f"sparse-zip64-c{self.compression:d}-"
                                        f"{offset:#011x}.part",
                                    )
                                    os.makedirs(
                                        os.path.dirname(part_fullname),
                                        exist_ok=True
                                    )
                                    part = open(part_fullname, "wb")
                                    print("Created", part_fullname)
                                part.write(data)
                            else:
                                if part:
                                    part.close()
                                part = None
                    finally:
                        if part:
                            part.close()

            if self.compression == ZIP_STORED:
                print(f"Creating sparse parts to check in into {TEST_DATA_DIR}:")
                make_sparse_zip_parts(TEMP_ZIP)

        else:
            def extract_offset(name):
                if m := re.search(r"-(0x[0-9a-f]{9})\.part$", name):
                    return int(m.group(1), base=16)
                raise ValueError(f"{name=} does not fit expected pattern.")
            offset_parts = [(extract_offset(n), n) for n in pre_built_zip_parts]
            with open(TEMP_ZIP, "wb") as f:
                for offset, part_fn in sorted(offset_parts):
                    with open(part_fn, "rb") as part:
                        f.seek(offset, os.SEEK_SET)
                        f.write(part.read())
            # Confirm that the reconstructed zip file works and looks right.
            with ZipFile(TEMP_ZIP, "r") as z:
                self.assertEqual(
                    z.getinfo("module.py").date_time, (1980, 1, 1, 0, 0, 0)
                )
                self.assertEqual(
                    z.read("module.py"), test_src.encode(),
                    msg=f"Recreate {full_parts_glob}, unexpected contents."
                )
                def assertDataEntry(name):
                    zinfo = z.getinfo(name)
                    self.assertEqual(zinfo.date_time, (1980, 1, 1, 0, 0, 0))
                    self.assertGreater(zinfo.file_size, 0xffff_ffff)
                assertDataEntry("data1")
                assertDataEntry("data2")

        self.doTestWithPreBuiltZip(".py", "module")


@support.requires_zlib()
class DeflateCompressedZipImportTestCase(UncompressedZipImportTestCase):
    compression = ZIP_DEFLATED


@support.requires_zstd()
class ZStdCompressedZipImportTestCase(UncompressedZipImportTestCase):
    compression = ZIP_ZSTANDARD


class BadFileZipImportTestCase(unittest.TestCase):
    def assertZipFailure(self, filename):
        self.assertRaises(zipimport.ZipImportError,
                          zipimport.zipimporter, filename)

    def testNoFile(self):
        self.assertZipFailure('AdfjdkFJKDFJjdklfjs')

    def testEmptyFilename(self):
        self.assertZipFailure('')

    def testBadArgs(self):
        self.assertRaises(TypeError, zipimport.zipimporter, None)
        self.assertRaises(TypeError, zipimport.zipimporter, TESTMOD, kwd=None)
        self.assertRaises(TypeError, zipimport.zipimporter,
                          list(os.fsencode(TESTMOD)))

    def testFilenameTooLong(self):
        self.assertZipFailure('A' * 33000)

    def testEmptyFile(self):
        os_helper.unlink(TESTMOD)
        os_helper.create_empty_file(TESTMOD)
        self.assertZipFailure(TESTMOD)

    @unittest.skipIf(support.is_wasi, "mode 000 not supported.")
    def testFileUnreadable(self):
        os_helper.unlink(TESTMOD)
        fd = os.open(TESTMOD, os.O_CREAT, 000)
        try:
            os.close(fd)

            with self.assertRaises(zipimport.ZipImportError) as cm:
                zipimport.zipimporter(TESTMOD)
        finally:
            # If we leave "the read-only bit" set on Windows, nothing can
            # delete TESTMOD, and later tests suffer bogus failures.
            os.chmod(TESTMOD, 0o666)
            os_helper.unlink(TESTMOD)

    def testNotZipFile(self):
        os_helper.unlink(TESTMOD)
        fp = open(TESTMOD, 'w+')
        fp.write('a' * 22)
        fp.close()
        self.assertZipFailure(TESTMOD)

    # XXX: disabled until this works on Big-endian machines
    def _testBogusZipFile(self):
        os_helper.unlink(TESTMOD)
        fp = open(TESTMOD, 'w+')
        fp.write(struct.pack('=I', 0x06054B50))
        fp.write('a' * 18)
        fp.close()
        z = zipimport.zipimporter(TESTMOD)

        try:
            self.assertRaises(TypeError, z.find_module, None)
            self.assertRaises(TypeError, z.find_spec, None)
            self.assertRaises(TypeError, z.exec_module, None)
            self.assertRaises(TypeError, z.is_package, None)
            self.assertRaises(TypeError, z.get_code, None)
            self.assertRaises(TypeError, z.get_data, None)
            self.assertRaises(TypeError, z.get_source, None)

            error = zipimport.ZipImportError
            self.assertIsNone(z.find_spec('abc'))
            self.assertRaises(error, z.get_code, 'abc')
            self.assertRaises(OSError, z.get_data, 'abc')
            self.assertRaises(error, z.get_source, 'abc')
            self.assertRaises(error, z.is_package, 'abc')
        finally:
            zipimport._zip_directory_cache.clear()


def tearDownModule():
    os_helper.unlink(TESTMOD)


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