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      1 import sys
      2 import compileall
      3 import importlib.util
      4 import test.test_importlib.util
      5 import os
      6 import pathlib
      7 import py_compile
      8 import shutil
      9 import struct
     10 import tempfile
     11 import time
     12 import unittest
     13 import io
     14 
     15 from unittest import mock, skipUnless
     16 try:
     17     from concurrent.futures import ProcessPoolExecutor
     18     _have_multiprocessing = True
     19 except ImportError:
     20     _have_multiprocessing = False
     21 
     22 from test import support
     23 from test.support import script_helper
     24 
     25 class CompileallTests(unittest.TestCase):
     26 
     27     def setUp(self):
     28         self.directory = tempfile.mkdtemp()
     29         self.source_path = os.path.join(self.directory, '_test.py')
     30         self.bc_path = importlib.util.cache_from_source(self.source_path)
     31         with open(self.source_path, 'w') as file:
     32             file.write('x = 123\n')
     33         self.source_path2 = os.path.join(self.directory, '_test2.py')
     34         self.bc_path2 = importlib.util.cache_from_source(self.source_path2)
     35         shutil.copyfile(self.source_path, self.source_path2)
     36         self.subdirectory = os.path.join(self.directory, '_subdir')
     37         os.mkdir(self.subdirectory)
     38         self.source_path3 = os.path.join(self.subdirectory, '_test3.py')
     39         shutil.copyfile(self.source_path, self.source_path3)
     40 
     41     def tearDown(self):
     42         shutil.rmtree(self.directory)
     43 
     44     def add_bad_source_file(self):
     45         self.bad_source_path = os.path.join(self.directory, '_test_bad.py')
     46         with open(self.bad_source_path, 'w') as file:
     47             file.write('x (\n')
     48 
     49     def data(self):
     50         with open(self.bc_path, 'rb') as file:
     51             data = file.read(8)
     52         mtime = int(os.stat(self.source_path).st_mtime)
     53         compare = struct.pack('<4sl', importlib.util.MAGIC_NUMBER, mtime)
     54         return data, compare
     55 
     56     @unittest.skipUnless(hasattr(os, 'stat'), 'test needs os.stat()')
     57     def recreation_check(self, metadata):
     58         """Check that compileall recreates bytecode when the new metadata is
     59         used."""
     60         py_compile.compile(self.source_path)
     61         self.assertEqual(*self.data())
     62         with open(self.bc_path, 'rb') as file:
     63             bc = file.read()[len(metadata):]
     64         with open(self.bc_path, 'wb') as file:
     65             file.write(metadata)
     66             file.write(bc)
     67         self.assertNotEqual(*self.data())
     68         compileall.compile_dir(self.directory, force=False, quiet=True)
     69         self.assertTrue(*self.data())
     70 
     71     def test_mtime(self):
     72         # Test a change in mtime leads to a new .pyc.
     73         self.recreation_check(struct.pack('<4sl', importlib.util.MAGIC_NUMBER,
     74                                           1))
     75 
     76     def test_magic_number(self):
     77         # Test a change in mtime leads to a new .pyc.
     78         self.recreation_check(b'\0\0\0\0')
     79 
     80     def test_compile_files(self):
     81         # Test compiling a single file, and complete directory
     82         for fn in (self.bc_path, self.bc_path2):
     83             try:
     84                 os.unlink(fn)
     85             except:
     86                 pass
     87         self.assertTrue(compileall.compile_file(self.source_path,
     88                                                 force=False, quiet=True))
     89         self.assertTrue(os.path.isfile(self.bc_path) and
     90                         not os.path.isfile(self.bc_path2))
     91         os.unlink(self.bc_path)
     92         self.assertTrue(compileall.compile_dir(self.directory, force=False,
     93                                                quiet=True))
     94         self.assertTrue(os.path.isfile(self.bc_path) and
     95                         os.path.isfile(self.bc_path2))
     96         os.unlink(self.bc_path)
     97         os.unlink(self.bc_path2)
     98         # Test against bad files
     99         self.add_bad_source_file()
    100         self.assertFalse(compileall.compile_file(self.bad_source_path,
    101                                                  force=False, quiet=2))
    102         self.assertFalse(compileall.compile_dir(self.directory,
    103                                                 force=False, quiet=2))
    104 
    105     def test_compile_file_pathlike(self):
    106         self.assertFalse(os.path.isfile(self.bc_path))
    107         # we should also test the output
    108         with support.captured_stdout() as stdout:
    109             self.assertTrue(compileall.compile_file(pathlib.Path(self.source_path)))
    110         self.assertRegex(stdout.getvalue(), r'Compiling ([^WindowsPath|PosixPath].*)')
    111         self.assertTrue(os.path.isfile(self.bc_path))
    112 
    113     def test_compile_file_pathlike_ddir(self):
    114         self.assertFalse(os.path.isfile(self.bc_path))
    115         self.assertTrue(compileall.compile_file(pathlib.Path(self.source_path),
    116                                                 ddir=pathlib.Path('ddir_path'),
    117                                                 quiet=2))
    118         self.assertTrue(os.path.isfile(self.bc_path))
    119 
    120     def test_compile_path(self):
    121         with test.test_importlib.util.import_state(path=[self.directory]):
    122             self.assertTrue(compileall.compile_path(quiet=2))
    123 
    124         with test.test_importlib.util.import_state(path=[self.directory]):
    125             self.add_bad_source_file()
    126             self.assertFalse(compileall.compile_path(skip_curdir=False,
    127                                                      force=True, quiet=2))
    128 
    129     def test_no_pycache_in_non_package(self):
    130         # Bug 8563 reported that __pycache__ directories got created by
    131         # compile_file() for non-.py files.
    132         data_dir = os.path.join(self.directory, 'data')
    133         data_file = os.path.join(data_dir, 'file')
    134         os.mkdir(data_dir)
    135         # touch data/file
    136         with open(data_file, 'w'):
    137             pass
    138         compileall.compile_file(data_file)
    139         self.assertFalse(os.path.exists(os.path.join(data_dir, '__pycache__')))
    140 
    141     def test_optimize(self):
    142         # make sure compiling with different optimization settings than the
    143         # interpreter's creates the correct file names
    144         optimize, opt = (1, 1) if __debug__ else (0, '')
    145         compileall.compile_dir(self.directory, quiet=True, optimize=optimize)
    146         cached = importlib.util.cache_from_source(self.source_path,
    147                                                   optimization=opt)
    148         self.assertTrue(os.path.isfile(cached))
    149         cached2 = importlib.util.cache_from_source(self.source_path2,
    150                                                    optimization=opt)
    151         self.assertTrue(os.path.isfile(cached2))
    152         cached3 = importlib.util.cache_from_source(self.source_path3,
    153                                                    optimization=opt)
    154         self.assertTrue(os.path.isfile(cached3))
    155 
    156     def test_compile_dir_pathlike(self):
    157         self.assertFalse(os.path.isfile(self.bc_path))
    158         with support.captured_stdout() as stdout:
    159             compileall.compile_dir(pathlib.Path(self.directory))
    160         line = stdout.getvalue().splitlines()[0]
    161         self.assertRegex(line, r'Listing ([^WindowsPath|PosixPath].*)')
    162         self.assertTrue(os.path.isfile(self.bc_path))
    163 
    164     @mock.patch('compileall.ProcessPoolExecutor')
    165     def test_compile_pool_called(self, pool_mock):
    166         compileall.compile_dir(self.directory, quiet=True, workers=5)
    167         self.assertTrue(pool_mock.called)
    168 
    169     def test_compile_workers_non_positive(self):
    170         with self.assertRaisesRegex(ValueError,
    171                                     "workers must be greater or equal to 0"):
    172             compileall.compile_dir(self.directory, workers=-1)
    173 
    174     @mock.patch('compileall.ProcessPoolExecutor')
    175     def test_compile_workers_cpu_count(self, pool_mock):
    176         compileall.compile_dir(self.directory, quiet=True, workers=0)
    177         self.assertEqual(pool_mock.call_args[1]['max_workers'], None)
    178 
    179     @mock.patch('compileall.ProcessPoolExecutor')
    180     @mock.patch('compileall.compile_file')
    181     def test_compile_one_worker(self, compile_file_mock, pool_mock):
    182         compileall.compile_dir(self.directory, quiet=True)
    183         self.assertFalse(pool_mock.called)
    184         self.assertTrue(compile_file_mock.called)
    185 
    186     @mock.patch('compileall.ProcessPoolExecutor', new=None)
    187     @mock.patch('compileall.compile_file')
    188     def test_compile_missing_multiprocessing(self, compile_file_mock):
    189         compileall.compile_dir(self.directory, quiet=True, workers=5)
    190         self.assertTrue(compile_file_mock.called)
    191 
    192 class EncodingTest(unittest.TestCase):
    193     """Issue 6716: compileall should escape source code when printing errors
    194     to stdout."""
    195 
    196     def setUp(self):
    197         self.directory = tempfile.mkdtemp()
    198         self.source_path = os.path.join(self.directory, '_test.py')
    199         with open(self.source_path, 'w', encoding='utf-8') as file:
    200             file.write('# -*- coding: utf-8 -*-\n')
    201             file.write('print u"\u20ac"\n')
    202 
    203     def tearDown(self):
    204         shutil.rmtree(self.directory)
    205 
    206     def test_error(self):
    207         try:
    208             orig_stdout = sys.stdout
    209             sys.stdout = io.TextIOWrapper(io.BytesIO(),encoding='ascii')
    210             compileall.compile_dir(self.directory)
    211         finally:
    212             sys.stdout = orig_stdout
    213 
    214 
    215 class CommandLineTests(unittest.TestCase):
    216     """Test compileall's CLI."""
    217 
    218     @classmethod
    219     def setUpClass(cls):
    220         for path in filter(os.path.isdir, sys.path):
    221             directory_created = False
    222             directory = pathlib.Path(path) / '__pycache__'
    223             path = directory / 'test.try'
    224             try:
    225                 if not directory.is_dir():
    226                     directory.mkdir()
    227                     directory_created = True
    228                 with path.open('w') as file:
    229                     file.write('# for test_compileall')
    230             except OSError:
    231                 sys_path_writable = False
    232                 break
    233             finally:
    234                 support.unlink(str(path))
    235                 if directory_created:
    236                     directory.rmdir()
    237         else:
    238             sys_path_writable = True
    239         cls._sys_path_writable = sys_path_writable
    240 
    241     def _skip_if_sys_path_not_writable(self):
    242         if not self._sys_path_writable:
    243             raise unittest.SkipTest('not all entries on sys.path are writable')
    244 
    245     def _get_run_args(self, args):
    246         return [*support.optim_args_from_interpreter_flags(),
    247                 '-S', '-m', 'compileall',
    248                 *args]
    249 
    250     def assertRunOK(self, *args, **env_vars):
    251         rc, out, err = script_helper.assert_python_ok(
    252                          *self._get_run_args(args), **env_vars)
    253         self.assertEqual(b'', err)
    254         return out
    255 
    256     def assertRunNotOK(self, *args, **env_vars):
    257         rc, out, err = script_helper.assert_python_failure(
    258                         *self._get_run_args(args), **env_vars)
    259         return rc, out, err
    260 
    261     def assertCompiled(self, fn):
    262         path = importlib.util.cache_from_source(fn)
    263         self.assertTrue(os.path.exists(path))
    264 
    265     def assertNotCompiled(self, fn):
    266         path = importlib.util.cache_from_source(fn)
    267         self.assertFalse(os.path.exists(path))
    268 
    269     def setUp(self):
    270         self.directory = tempfile.mkdtemp()
    271         self.addCleanup(support.rmtree, self.directory)
    272         self.pkgdir = os.path.join(self.directory, 'foo')
    273         os.mkdir(self.pkgdir)
    274         self.pkgdir_cachedir = os.path.join(self.pkgdir, '__pycache__')
    275         # Create the __init__.py and a package module.
    276         self.initfn = script_helper.make_script(self.pkgdir, '__init__', '')
    277         self.barfn = script_helper.make_script(self.pkgdir, 'bar', '')
    278 
    279     def test_no_args_compiles_path(self):
    280         # Note that -l is implied for the no args case.
    281         self._skip_if_sys_path_not_writable()
    282         bazfn = script_helper.make_script(self.directory, 'baz', '')
    283         self.assertRunOK(PYTHONPATH=self.directory)
    284         self.assertCompiled(bazfn)
    285         self.assertNotCompiled(self.initfn)
    286         self.assertNotCompiled(self.barfn)
    287 
    288     def test_no_args_respects_force_flag(self):
    289         self._skip_if_sys_path_not_writable()
    290         bazfn = script_helper.make_script(self.directory, 'baz', '')
    291         self.assertRunOK(PYTHONPATH=self.directory)
    292         pycpath = importlib.util.cache_from_source(bazfn)
    293         # Set atime/mtime backward to avoid file timestamp resolution issues
    294         os.utime(pycpath, (time.time()-60,)*2)
    295         mtime = os.stat(pycpath).st_mtime
    296         # Without force, no recompilation
    297         self.assertRunOK(PYTHONPATH=self.directory)
    298         mtime2 = os.stat(pycpath).st_mtime
    299         self.assertEqual(mtime, mtime2)
    300         # Now force it.
    301         self.assertRunOK('-f', PYTHONPATH=self.directory)
    302         mtime2 = os.stat(pycpath).st_mtime
    303         self.assertNotEqual(mtime, mtime2)
    304 
    305     def test_no_args_respects_quiet_flag(self):
    306         self._skip_if_sys_path_not_writable()
    307         script_helper.make_script(self.directory, 'baz', '')
    308         noisy = self.assertRunOK(PYTHONPATH=self.directory)
    309         self.assertIn(b'Listing ', noisy)
    310         quiet = self.assertRunOK('-q', PYTHONPATH=self.directory)
    311         self.assertNotIn(b'Listing ', quiet)
    312 
    313     # Ensure that the default behavior of compileall's CLI is to create
    314     # PEP 3147/PEP 488 pyc files.
    315     for name, ext, switch in [
    316         ('normal', 'pyc', []),
    317         ('optimize', 'opt-1.pyc', ['-O']),
    318         ('doubleoptimize', 'opt-2.pyc', ['-OO']),
    319     ]:
    320         def f(self, ext=ext, switch=switch):
    321             script_helper.assert_python_ok(*(switch +
    322                 ['-m', 'compileall', '-q', self.pkgdir]))
    323             # Verify the __pycache__ directory contents.
    324             self.assertTrue(os.path.exists(self.pkgdir_cachedir))
    325             expected = sorted(base.format(sys.implementation.cache_tag, ext)
    326                               for base in ('__init__.{}.{}', 'bar.{}.{}'))
    327             self.assertEqual(sorted(os.listdir(self.pkgdir_cachedir)), expected)
    328             # Make sure there are no .pyc files in the source directory.
    329             self.assertFalse([fn for fn in os.listdir(self.pkgdir)
    330                               if fn.endswith(ext)])
    331         locals()['test_pep3147_paths_' + name] = f
    332 
    333     def test_legacy_paths(self):
    334         # Ensure that with the proper switch, compileall leaves legacy
    335         # pyc files, and no __pycache__ directory.
    336         self.assertRunOK('-b', '-q', self.pkgdir)
    337         # Verify the __pycache__ directory contents.
    338         self.assertFalse(os.path.exists(self.pkgdir_cachedir))
    339         expected = sorted(['__init__.py', '__init__.pyc', 'bar.py',
    340                            'bar.pyc'])
    341         self.assertEqual(sorted(os.listdir(self.pkgdir)), expected)
    342 
    343     def test_multiple_runs(self):
    344         # Bug 8527 reported that multiple calls produced empty
    345         # __pycache__/__pycache__ directories.
    346         self.assertRunOK('-q', self.pkgdir)
    347         # Verify the __pycache__ directory contents.
    348         self.assertTrue(os.path.exists(self.pkgdir_cachedir))
    349         cachecachedir = os.path.join(self.pkgdir_cachedir, '__pycache__')
    350         self.assertFalse(os.path.exists(cachecachedir))
    351         # Call compileall again.
    352         self.assertRunOK('-q', self.pkgdir)
    353         self.assertTrue(os.path.exists(self.pkgdir_cachedir))
    354         self.assertFalse(os.path.exists(cachecachedir))
    355 
    356     def test_force(self):
    357         self.assertRunOK('-q', self.pkgdir)
    358         pycpath = importlib.util.cache_from_source(self.barfn)
    359         # set atime/mtime backward to avoid file timestamp resolution issues
    360         os.utime(pycpath, (time.time()-60,)*2)
    361         mtime = os.stat(pycpath).st_mtime
    362         # without force, no recompilation
    363         self.assertRunOK('-q', self.pkgdir)
    364         mtime2 = os.stat(pycpath).st_mtime
    365         self.assertEqual(mtime, mtime2)
    366         # now force it.
    367         self.assertRunOK('-q', '-f', self.pkgdir)
    368         mtime2 = os.stat(pycpath).st_mtime
    369         self.assertNotEqual(mtime, mtime2)
    370 
    371     def test_recursion_control(self):
    372         subpackage = os.path.join(self.pkgdir, 'spam')
    373         os.mkdir(subpackage)
    374         subinitfn = script_helper.make_script(subpackage, '__init__', '')
    375         hamfn = script_helper.make_script(subpackage, 'ham', '')
    376         self.assertRunOK('-q', '-l', self.pkgdir)
    377         self.assertNotCompiled(subinitfn)
    378         self.assertFalse(os.path.exists(os.path.join(subpackage, '__pycache__')))
    379         self.assertRunOK('-q', self.pkgdir)
    380         self.assertCompiled(subinitfn)
    381         self.assertCompiled(hamfn)
    382 
    383     def test_recursion_limit(self):
    384         subpackage = os.path.join(self.pkgdir, 'spam')
    385         subpackage2 = os.path.join(subpackage, 'ham')
    386         subpackage3 = os.path.join(subpackage2, 'eggs')
    387         for pkg in (subpackage, subpackage2, subpackage3):
    388             script_helper.make_pkg(pkg)
    389 
    390         subinitfn = os.path.join(subpackage, '__init__.py')
    391         hamfn = script_helper.make_script(subpackage, 'ham', '')
    392         spamfn = script_helper.make_script(subpackage2, 'spam', '')
    393         eggfn = script_helper.make_script(subpackage3, 'egg', '')
    394 
    395         self.assertRunOK('-q', '-r 0', self.pkgdir)
    396         self.assertNotCompiled(subinitfn)
    397         self.assertFalse(
    398             os.path.exists(os.path.join(subpackage, '__pycache__')))
    399 
    400         self.assertRunOK('-q', '-r 1', self.pkgdir)
    401         self.assertCompiled(subinitfn)
    402         self.assertCompiled(hamfn)
    403         self.assertNotCompiled(spamfn)
    404 
    405         self.assertRunOK('-q', '-r 2', self.pkgdir)
    406         self.assertCompiled(subinitfn)
    407         self.assertCompiled(hamfn)
    408         self.assertCompiled(spamfn)
    409         self.assertNotCompiled(eggfn)
    410 
    411         self.assertRunOK('-q', '-r 5', self.pkgdir)
    412         self.assertCompiled(subinitfn)
    413         self.assertCompiled(hamfn)
    414         self.assertCompiled(spamfn)
    415         self.assertCompiled(eggfn)
    416 
    417     def test_quiet(self):
    418         noisy = self.assertRunOK(self.pkgdir)
    419         quiet = self.assertRunOK('-q', self.pkgdir)
    420         self.assertNotEqual(b'', noisy)
    421         self.assertEqual(b'', quiet)
    422 
    423     def test_silent(self):
    424         script_helper.make_script(self.pkgdir, 'crunchyfrog', 'bad(syntax')
    425         _, quiet, _ = self.assertRunNotOK('-q', self.pkgdir)
    426         _, silent, _ = self.assertRunNotOK('-qq', self.pkgdir)
    427         self.assertNotEqual(b'', quiet)
    428         self.assertEqual(b'', silent)
    429 
    430     def test_regexp(self):
    431         self.assertRunOK('-q', '-x', r'ba[^\\/]*$', self.pkgdir)
    432         self.assertNotCompiled(self.barfn)
    433         self.assertCompiled(self.initfn)
    434 
    435     def test_multiple_dirs(self):
    436         pkgdir2 = os.path.join(self.directory, 'foo2')
    437         os.mkdir(pkgdir2)
    438         init2fn = script_helper.make_script(pkgdir2, '__init__', '')
    439         bar2fn = script_helper.make_script(pkgdir2, 'bar2', '')
    440         self.assertRunOK('-q', self.pkgdir, pkgdir2)
    441         self.assertCompiled(self.initfn)
    442         self.assertCompiled(self.barfn)
    443         self.assertCompiled(init2fn)
    444         self.assertCompiled(bar2fn)
    445 
    446     def test_d_compile_error(self):
    447         script_helper.make_script(self.pkgdir, 'crunchyfrog', 'bad(syntax')
    448         rc, out, err = self.assertRunNotOK('-q', '-d', 'dinsdale', self.pkgdir)
    449         self.assertRegex(out, b'File "dinsdale')
    450 
    451     def test_d_runtime_error(self):
    452         bazfn = script_helper.make_script(self.pkgdir, 'baz', 'raise Exception')
    453         self.assertRunOK('-q', '-d', 'dinsdale', self.pkgdir)
    454         fn = script_helper.make_script(self.pkgdir, 'bing', 'import baz')
    455         pyc = importlib.util.cache_from_source(bazfn)
    456         os.rename(pyc, os.path.join(self.pkgdir, 'baz.pyc'))
    457         os.remove(bazfn)
    458         rc, out, err = script_helper.assert_python_failure(fn, __isolated=False)
    459         self.assertRegex(err, b'File "dinsdale')
    460 
    461     def test_include_bad_file(self):
    462         rc, out, err = self.assertRunNotOK(
    463             '-i', os.path.join(self.directory, 'nosuchfile'), self.pkgdir)
    464         self.assertRegex(out, b'rror.*nosuchfile')
    465         self.assertNotRegex(err, b'Traceback')
    466         self.assertFalse(os.path.exists(importlib.util.cache_from_source(
    467                                             self.pkgdir_cachedir)))
    468 
    469     def test_include_file_with_arg(self):
    470         f1 = script_helper.make_script(self.pkgdir, 'f1', '')
    471         f2 = script_helper.make_script(self.pkgdir, 'f2', '')
    472         f3 = script_helper.make_script(self.pkgdir, 'f3', '')
    473         f4 = script_helper.make_script(self.pkgdir, 'f4', '')
    474         with open(os.path.join(self.directory, 'l1'), 'w') as l1:
    475             l1.write(os.path.join(self.pkgdir, 'f1.py')+os.linesep)
    476             l1.write(os.path.join(self.pkgdir, 'f2.py')+os.linesep)
    477         self.assertRunOK('-i', os.path.join(self.directory, 'l1'), f4)
    478         self.assertCompiled(f1)
    479         self.assertCompiled(f2)
    480         self.assertNotCompiled(f3)
    481         self.assertCompiled(f4)
    482 
    483     def test_include_file_no_arg(self):
    484         f1 = script_helper.make_script(self.pkgdir, 'f1', '')
    485         f2 = script_helper.make_script(self.pkgdir, 'f2', '')
    486         f3 = script_helper.make_script(self.pkgdir, 'f3', '')
    487         f4 = script_helper.make_script(self.pkgdir, 'f4', '')
    488         with open(os.path.join(self.directory, 'l1'), 'w') as l1:
    489             l1.write(os.path.join(self.pkgdir, 'f2.py')+os.linesep)
    490         self.assertRunOK('-i', os.path.join(self.directory, 'l1'))
    491         self.assertNotCompiled(f1)
    492         self.assertCompiled(f2)
    493         self.assertNotCompiled(f3)
    494         self.assertNotCompiled(f4)
    495 
    496     def test_include_on_stdin(self):
    497         f1 = script_helper.make_script(self.pkgdir, 'f1', '')
    498         f2 = script_helper.make_script(self.pkgdir, 'f2', '')
    499         f3 = script_helper.make_script(self.pkgdir, 'f3', '')
    500         f4 = script_helper.make_script(self.pkgdir, 'f4', '')
    501         p = script_helper.spawn_python(*(self._get_run_args(()) + ['-i', '-']))
    502         p.stdin.write((f3+os.linesep).encode('ascii'))
    503         script_helper.kill_python(p)
    504         self.assertNotCompiled(f1)
    505         self.assertNotCompiled(f2)
    506         self.assertCompiled(f3)
    507         self.assertNotCompiled(f4)
    508 
    509     def test_compiles_as_much_as_possible(self):
    510         bingfn = script_helper.make_script(self.pkgdir, 'bing', 'syntax(error')
    511         rc, out, err = self.assertRunNotOK('nosuchfile', self.initfn,
    512                                            bingfn, self.barfn)
    513         self.assertRegex(out, b'rror')
    514         self.assertNotCompiled(bingfn)
    515         self.assertCompiled(self.initfn)
    516         self.assertCompiled(self.barfn)
    517 
    518     def test_invalid_arg_produces_message(self):
    519         out = self.assertRunOK('badfilename')
    520         self.assertRegex(out, b"Can't list 'badfilename'")
    521 
    522     @skipUnless(_have_multiprocessing, "requires multiprocessing")
    523     def test_workers(self):
    524         bar2fn = script_helper.make_script(self.directory, 'bar2', '')
    525         files = []
    526         for suffix in range(5):
    527             pkgdir = os.path.join(self.directory, 'foo{}'.format(suffix))
    528             os.mkdir(pkgdir)
    529             fn = script_helper.make_script(pkgdir, '__init__', '')
    530             files.append(script_helper.make_script(pkgdir, 'bar2', ''))
    531 
    532         self.assertRunOK(self.directory, '-j', '0')
    533         self.assertCompiled(bar2fn)
    534         for file in files:
    535             self.assertCompiled(file)
    536 
    537     @mock.patch('compileall.compile_dir')
    538     def test_workers_available_cores(self, compile_dir):
    539         with mock.patch("sys.argv",
    540                         new=[sys.executable, self.directory, "-j0"]):
    541             compileall.main()
    542             self.assertTrue(compile_dir.called)
    543             self.assertEqual(compile_dir.call_args[-1]['workers'], None)
    544 
    545 
    546 if __name__ == "__main__":
    547     unittest.main()
    548