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)
                test_support.unlink(ABSTFN + "/k")
                safe_rmdir(ABSTFN + "/y")
                safe_rmdir(ABSTFN)