test_os.py 文件源码

def test_tmpnam(self):
        if not hasattr(os, "tmpnam"):
            return
        with warnings.catch_warnings():
            warnings.filterwarnings("ignore", "tmpnam", RuntimeWarning,
                                    r"test_os$")
            warnings.filterwarnings("ignore", "tmpnam", DeprecationWarning)

            name = os.tmpnam()
            if sys.platform in ("win32",):
                # The Windows tmpnam() seems useless.  From the MS docs:
                #
                #     The character string that tmpnam creates consists of
                #     the path prefix, defined by the entry P_tmpdir in the
                #     file STDIO.H, followed by a sequence consisting of the
                #     digit characters '0' through '9'; the numerical value
                #     of this string is in the range 1 - 65,535.  Changing the
                #     definitions of L_tmpnam or P_tmpdir in STDIO.H does not
                #     change the operation of tmpnam.
                #
                # The really bizarre part is that, at least under MSVC6,
                # P_tmpdir is "\\".  That is, the path returned refers to
                # the root of the current drive.  That's a terrible place to
                # put temp files, and, depending on privileges, the user
                # may not even be able to open a file in the root directory.
                self.assertFalse(os.path.exists(name),
                            "file already exists for temporary file")
            else:
                self.check_tempfile(name)

# Test attributes on return values from os.*stat* family.