'Verify handling of "py-up" at the top of the stack'

@unittest.skipUnless(HAS_PYUP_PYDOWN, 'test    requires    py-up/py-down    commands')
def test_up_at_top(self):

    bt = self.get_stack_trace(script=self.get_sample_script(), cmds_after_breakpoint=(['py-up'] * 5))
    self.assertEndsWith(bt, 'Unable    to    find    an    older    python    frame\n')
