test_posixpath.py 文件源码

def test_realpath_resolve_before_normalizing(self):
        # Bug #990669: Symbolic links should be resolved before we
        # normalize the path. E.g.: if we have directories 'a', 'k' and 'y'
        # in the following hierarchy:
        # a/k/y
        #
        # and a symbolic link 'link-y' pointing to 'y' in directory 'a',
        # then realpath("link-y/..") should return 'k', not 'a'.
        try:
            old_path = abspath('.')
            os.mkdir(ABSTFN)
            os.mkdir(ABSTFN + "/k")
            os.mkdir(ABSTFN + "/k/y")
            os.symlink(ABSTFN + "/k/y", ABSTFN + "/link-y")

            # Absolute path.
            self.assertEqual(realpath(ABSTFN + "/link-y/.."), ABSTFN + "/k")
            # Relative path.
            os.chdir(dirname(ABSTFN))
            self.assertEqual(realpath(basename(ABSTFN) + "/link-y/.."),
                             ABSTFN + "/k")
        finally:
            os.chdir(old_path)
            support.unlink(ABSTFN + "/link-y")
            safe_rmdir(ABSTFN + "/k/y")
            safe_rmdir(ABSTFN + "/k")
            safe_rmdir(ABSTFN)