test_posixpath.py 文件源码

def test_realpath_symlink_loops(self):
        # Bug #930024, return the path unchanged if we get into an infinite
        # symlink loop.
        try:
            old_path = abspath('.')
            os.symlink(ABSTFN, ABSTFN)
            self.assertEqual(realpath(ABSTFN), ABSTFN)

            os.symlink(ABSTFN+"1", ABSTFN+"2")
            os.symlink(ABSTFN+"2", ABSTFN+"1")
            self.assertEqual(realpath(ABSTFN+"1"), ABSTFN+"1")
            self.assertEqual(realpath(ABSTFN+"2"), ABSTFN+"2")

            # Test using relative path as well.
            os.chdir(dirname(ABSTFN))
            self.assertEqual(realpath(basename(ABSTFN)), ABSTFN)
        finally:
            os.chdir(old_path)
            support.unlink(ABSTFN)
            support.unlink(ABSTFN+"1")
            support.unlink(ABSTFN+"2")