How to use the rak811.rak811.RecvEx function in rak811

def test_recv_ex_disabled(runner, mock_rak811):
    p = PropertyMock()
    type(mock_rak811.return_value).recv_ex = p
    result = runner.invoke(cli, ['-v', 'recv-ex', 'disable'])
    p.assert_called_once_with(RecvEx.Disabled)
    assert result.output == 'RSSI & SNR report on receive Disabled.\n'

def test_set_recv_ex(mock_send, lora):
    """Test recv_ex setter."""
    lora.recv_ex = RecvEx.Disabled
    mock_send.assert_called_once_with('recv_ex=1')

def test_recv_ex(runner, mock_rak811):
    p = PropertyMock(return_value=RecvEx.Enabled)
    type(mock_rak811.return_value).recv_ex = p
    result = runner.invoke(cli, ['recv-ex'])
    p.assert_called_once_with()
    assert result.output == 'Enabled\n'