test_posixpath.py 文件源码

def test_realpath_resolve_parents(self):
        # We also need to resolve any symlinks in the parents of a relative
        # path passed to realpath. E.g.: current working directory is
        # /usr/doc with 'doc' being a symlink to /usr/share/doc. We call
        # realpath("a"). This should return /usr/share/doc/a/.
        try:
            old_path = abspath('.')
            os.mkdir(ABSTFN)
            os.mkdir(ABSTFN + "/y")
            os.symlink(ABSTFN + "/y", ABSTFN + "/k")

            os.chdir(ABSTFN + "/k")
            self.assertEqual(realpath("a"), ABSTFN + "/y/a")
        finally:
            os.chdir(old_path)
            support.unlink(ABSTFN + "/k")
            safe_rmdir(ABSTFN + "/y")
            safe_rmdir(ABSTFN)