Failing tests on Windows cannot be reproduced

[RogerHaase]

When tests are run on Windows, there are occasional failures that cannot be reproduced on reruns. On example below FileExistsError: [WinError 183] Cannot create a file when that file already exists:

Workaround is to rerun tests.

================================== FAILURES ===================================
________________________________ test_load_all ________________________________

artifact_dir = WindowsPath('C:/Clones/ThomasWaldmann/moin/_test_artifacts/cli')
save_all = CompletedProcess(args=['moin', 'save', '-a', '-f', WindowsPath('C:/Clones/ThomasWaldmann/moin/_test_artifacts/backup.m...d by index rebuild is recommended\r\n2024-02-23 14:05:52,070 INFO moin.cli.maint.serialization:70 Backup finished\r\n')

    def test_load_all(artifact_dir, save_all):
        restore_dir = Path(artifact_dir / 'restore_all')
>       load(restore_dir, 'backup.moin', artifact_dir)

C:\Clones\ThomasWaldmann\moin\src\moin\cli\_tests\test_serialization.py:41: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
C:\Clones\ThomasWaldmann\moin\src\moin\cli\_tests\test_serialization.py:26: in load
    restore_dir.mkdir()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = WindowsPath('C:/Clones/ThomasWaldmann/moin/_test_artifacts/cli/restore_all')
mode = 511, parents = False, exist_ok = False

    def mkdir(self, mode=0o777, parents=False, exist_ok=False):
        """
        Create a new directory at this given path.
        """
        try:
>           self._accessor.mkdir(self, mode)
E           FileExistsError: [WinError 183] Cannot create a file when that file already exists: 'C:\\Clones\\ThomasWaldmann\\moin\\_test_artifacts\\cli\\restore_all'

C:\Users\haase\AppData\Local\Programs\Python\Python310\lib\pathlib.py:1175: FileExistsError
____________________________ test_load_default_ns _____________________________

artifact_dir = WindowsPath('C:/Clones/ThomasWaldmann/moin/_test_artifacts/cli')
save_default = CompletedProcess(args=['moin', 'save', '-b', 'default', '-f', WindowsPath('C:/Clones/ThomasWaldmann/moin/_test_artifac...d by index rebuild is recommended\r\n2024-02-23 14:05:55,219 INFO moin.cli.maint.serialization:70 Backup finished\r\n')

    def test_load_default_ns(artifact_dir, save_default):
        moin_dir, _ = get_dirs('')
        welcome_dir = moin_dir / 'src' / 'moin' / 'help' / 'welcome'
        expected_metas = {}
        for data_fn in welcome_dir.glob('*.meta'):
            with open(data_fn) as f:
                meta = json.load(f)
                if meta[NAMESPACE] != '':
                    continue
                name = meta[NAME][0]
                expected_metas[name] = meta
        restore_dir = Path(artifact_dir / 'restore_default')
>       load(restore_dir, 'backup_default.moin', artifact_dir)

C:\Clones\ThomasWaldmann\moin\src\moin\cli\_tests\test_serialization.py:61: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
C:\Clones\ThomasWaldmann\moin\src\moin\cli\_tests\test_serialization.py:26: in load
    restore_dir.mkdir()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = WindowsPath('C:/Clones/ThomasWaldmann/moin/_test_artifacts/cli/restore_default')
mode = 511, parents = False, exist_ok = False

    def mkdir(self, mode=0o777, parents=False, exist_ok=False):
        """
        Create a new directory at this given path.
        """
        try:
>           self._accessor.mkdir(self, mode)
E           FileExistsError: [WinError 183] Cannot create a file when that file already exists: 'C:\\Clones\\ThomasWaldmann\\moin\\_test_artifacts\\cli\\restore_default'

C:\Users\haase\AppData\Local\Programs\Python\Python310\lib\pathlib.py:1175: FileExistsError
______________________________ test_load_new_ns _______________________________

artifact_dir = WindowsPath('C:/Clones/ThomasWaldmann/moin/_test_artifacts/cli')
save_default = CompletedProcess(args=['moin', 'save', '-b', 'default', '-f', WindowsPath('C:/Clones/ThomasWaldmann/moin/_test_artifac...d by index rebuild is recommended\r\n2024-02-23 14:05:55,219 INFO moin.cli.maint.serialization:70 Backup finished\r\n')

    def test_load_new_ns(artifact_dir, save_default):
        restore_dir = Path(artifact_dir / 'restore_new_ns')
>       load(restore_dir, 'backup_default.moin', artifact_dir, ['-o', '', '-n', 'help-en'])

C:\Clones\ThomasWaldmann\moin\src\moin\cli\_tests\test_serialization.py:91: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
C:\Clones\ThomasWaldmann\moin\src\moin\cli\_tests\test_serialization.py:26: in load
    restore_dir.mkdir()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = WindowsPath('C:/Clones/ThomasWaldmann/moin/_test_artifacts/cli/restore_new_ns')
mode = 511, parents = False, exist_ok = False

    def mkdir(self, mode=0o777, parents=False, exist_ok=False):
        """
        Create a new directory at this given path.
        """
        try:
>           self._accessor.mkdir(self, mode)
E           FileExistsError: [WinError 183] Cannot create a file when that file already exists: 'C:\\Clones\\ThomasWaldmann\\moin\\_test_artifacts\\cli\\restore_new_ns'

C:\Users\haase\AppData\Local\Programs\Python\Python310\lib\pathlib.py:1175: FileExistsError