Test failures on macOS due to OSError: AF_UNIX path too long

[austinbutler]

Similar to or same as psf/black#2105.

============================= test session starts ==============================
platform darwin -- Python 3.9.6, pytest-6.2.5, py-1.10.0, pluggy-1.0.0
rootdir: /private/var/folders/1s/gpt7p1x559sb7qjb_4bhq7zc75yv8y/T/nix-build-python3.9-testpath-0.5.0.drv-0/testpath-0.5.0
collected 14 items

tests/test_asserts.py FFFFFFF                                            [ 50%]
tests/test_commands.py ....                                              [ 78%]
tests/test_env.py ...                                                    [100%]

=================================== FAILURES ===================================
_______________________ TestAssertFunctions.test_exists ________________________

self = <tests.test_asserts.TestAssertFunctions testMethod=test_exists>

    def setUp(self):
        self.td = TemporaryDirectory()
        self.addCleanup(self.td.cleanup)

        self.file_path = os.path.join(self.td.name, 'afile')
        with open(self.file_path, 'w') as f:
            f.write('Blah')

        self.dir_path = os.path.join(self.td.name, 'adir')
        os.mkdir(self.dir_path)

        self.link_path = os.path.join(self.td.name, 'alink')
        self.pipe_path = os.path.join(self.td.name, 'apipe')
        self.socket_path = os.path.join(self.td.name, 'asocket')
        if os.name == 'posix':
            # Symlinks are rarely usable on Windows, because a special
            # permission is needed to create them.
            os.symlink(self.file_path, self.link_path)
            os.mkfifo(self.pipe_path)
            self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
>           self.sock.bind(self.socket_path)
E           OSError: AF_UNIX path too long

tests/test_asserts.py:35: OSError
________________________ TestAssertFunctions.test_isdir ________________________

self = <tests.test_asserts.TestAssertFunctions testMethod=test_isdir>

    def setUp(self):
        self.td = TemporaryDirectory()
        self.addCleanup(self.td.cleanup)

        self.file_path = os.path.join(self.td.name, 'afile')
        with open(self.file_path, 'w') as f:
            f.write('Blah')

        self.dir_path = os.path.join(self.td.name, 'adir')
        os.mkdir(self.dir_path)

        self.link_path = os.path.join(self.td.name, 'alink')
        self.pipe_path = os.path.join(self.td.name, 'apipe')
        self.socket_path = os.path.join(self.td.name, 'asocket')
        if os.name == 'posix':
            # Symlinks are rarely usable on Windows, because a special
            # permission is needed to create them.
            os.symlink(self.file_path, self.link_path)
            os.mkfifo(self.pipe_path)
            self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
>           self.sock.bind(self.socket_path)
E           OSError: AF_UNIX path too long

tests/test_asserts.py:35: OSError
_______________________ TestAssertFunctions.test_isfile ________________________

self = <tests.test_asserts.TestAssertFunctions testMethod=test_isfile>

    def setUp(self):
        self.td = TemporaryDirectory()
        self.addCleanup(self.td.cleanup)

        self.file_path = os.path.join(self.td.name, 'afile')
        with open(self.file_path, 'w') as f:
            f.write('Blah')

        self.dir_path = os.path.join(self.td.name, 'adir')
        os.mkdir(self.dir_path)

        self.link_path = os.path.join(self.td.name, 'alink')
        self.pipe_path = os.path.join(self.td.name, 'apipe')
        self.socket_path = os.path.join(self.td.name, 'asocket')
        if os.name == 'posix':
            # Symlinks are rarely usable on Windows, because a special
            # permission is needed to create them.
            os.symlink(self.file_path, self.link_path)
            os.mkfifo(self.pipe_path)
            self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
>           self.sock.bind(self.socket_path)
E           OSError: AF_UNIX path too long

tests/test_asserts.py:35: OSError
___________________ TestAssertFunctions.test_isfile_symlink ____________________

self = <tests.test_asserts.TestAssertFunctions testMethod=test_isfile_symlink>

    def setUp(self):
        self.td = TemporaryDirectory()
        self.addCleanup(self.td.cleanup)

        self.file_path = os.path.join(self.td.name, 'afile')
        with open(self.file_path, 'w') as f:
            f.write('Blah')

        self.dir_path = os.path.join(self.td.name, 'adir')
        os.mkdir(self.dir_path)

        self.link_path = os.path.join(self.td.name, 'alink')
        self.pipe_path = os.path.join(self.td.name, 'apipe')
        self.socket_path = os.path.join(self.td.name, 'asocket')
        if os.name == 'posix':
            # Symlinks are rarely usable on Windows, because a special
            # permission is needed to create them.
            os.symlink(self.file_path, self.link_path)
            os.mkfifo(self.pipe_path)
            self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
>           self.sock.bind(self.socket_path)
E           OSError: AF_UNIX path too long

tests/test_asserts.py:35: OSError
_______________________ TestAssertFunctions.test_islink ________________________

self = <tests.test_asserts.TestAssertFunctions testMethod=test_islink>

    def setUp(self):
        self.td = TemporaryDirectory()
        self.addCleanup(self.td.cleanup)

        self.file_path = os.path.join(self.td.name, 'afile')
        with open(self.file_path, 'w') as f:
            f.write('Blah')

        self.dir_path = os.path.join(self.td.name, 'adir')
        os.mkdir(self.dir_path)

        self.link_path = os.path.join(self.td.name, 'alink')
        self.pipe_path = os.path.join(self.td.name, 'apipe')
        self.socket_path = os.path.join(self.td.name, 'asocket')
        if os.name == 'posix':
            # Symlinks are rarely usable on Windows, because a special
            # permission is needed to create them.
            os.symlink(self.file_path, self.link_path)
            os.mkfifo(self.pipe_path)
            self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
>           self.sock.bind(self.socket_path)
E           OSError: AF_UNIX path too long

tests/test_asserts.py:35: OSError
_______________________ TestAssertFunctions.test_ispipe ________________________

self = <tests.test_asserts.TestAssertFunctions testMethod=test_ispipe>

    def setUp(self):
        self.td = TemporaryDirectory()
        self.addCleanup(self.td.cleanup)

        self.file_path = os.path.join(self.td.name, 'afile')
        with open(self.file_path, 'w') as f:
            f.write('Blah')

        self.dir_path = os.path.join(self.td.name, 'adir')
        os.mkdir(self.dir_path)

        self.link_path = os.path.join(self.td.name, 'alink')
        self.pipe_path = os.path.join(self.td.name, 'apipe')
        self.socket_path = os.path.join(self.td.name, 'asocket')
        if os.name == 'posix':
            # Symlinks are rarely usable on Windows, because a special
            # permission is needed to create them.
            os.symlink(self.file_path, self.link_path)
            os.mkfifo(self.pipe_path)
            self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
>           self.sock.bind(self.socket_path)
E           OSError: AF_UNIX path too long

tests/test_asserts.py:35: OSError
______________________ TestAssertFunctions.test_issocket _______________________

self = <tests.test_asserts.TestAssertFunctions testMethod=test_issocket>

    def setUp(self):
        self.td = TemporaryDirectory()
        self.addCleanup(self.td.cleanup)

        self.file_path = os.path.join(self.td.name, 'afile')
        with open(self.file_path, 'w') as f:
            f.write('Blah')

        self.dir_path = os.path.join(self.td.name, 'adir')
        os.mkdir(self.dir_path)

        self.link_path = os.path.join(self.td.name, 'alink')
        self.pipe_path = os.path.join(self.td.name, 'apipe')
        self.socket_path = os.path.join(self.td.name, 'asocket')
        if os.name == 'posix':
            # Symlinks are rarely usable on Windows, because a special
            # permission is needed to create them.
            os.symlink(self.file_path, self.link_path)
            os.mkfifo(self.pipe_path)
            self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
>           self.sock.bind(self.socket_path)
E           OSError: AF_UNIX path too long

tests/test_asserts.py:35: OSError
=========================== short test summary info ============================
FAILED tests/test_asserts.py::TestAssertFunctions::test_exists - OSError: AF_...
FAILED tests/test_asserts.py::TestAssertFunctions::test_isdir - OSError: AF_U...
FAILED tests/test_asserts.py::TestAssertFunctions::test_isfile - OSError: AF_...
FAILED tests/test_asserts.py::TestAssertFunctions::test_isfile_symlink - OSEr...
FAILED tests/test_asserts.py::TestAssertFunctions::test_islink - OSError: AF_...
FAILED tests/test_asserts.py::TestAssertFunctions::test_ispipe - OSError: AF_...
FAILED tests/test_asserts.py::TestAssertFunctions::test_issocket - OSError: A...
========================= 7 failed, 7 passed in 1.16s ==========================