How to use the freqtrade.DependencyException function in freqtrade

def test_setup_configuration_unlimited_stake_amount(mocker, default_conf, caplog) -> None:
    default_conf['stake_amount'] = constants.UNLIMITED_STAKE_AMOUNT

    patched_configuration_load_config_file(mocker, default_conf)

    args = [
        'backtesting',
        '--config', 'config.json',
        '--strategy', 'DefaultStrategy',
    ]

    with pytest.raises(DependencyException, match=r'.*stake amount.*'):
        setup_configuration(get_args(args), RunMode.BACKTEST)

'info': {
            'stopPrice': '0.1'
        }
    }
    mocker.patch('freqtrade.exchange.Exchange.cancel_order', side_effect=InvalidOrderException())
    mocker.patch('freqtrade.exchange.Exchange.get_order', stoploss_order_hanging)
    freqtrade.handle_trailing_stoploss_on_exchange(trade, stoploss_order_hanging)
    assert log_has_re(r"Could not cancel stoploss order abcd for pair ETH/BTC.*", caplog)

    # Still try to create order
    assert stoploss_limit.call_count == 1

    # Fail creating stoploss order
    caplog.clear()
    cancel_mock = mocker.patch("freqtrade.exchange.Exchange.cancel_order", MagicMock())
    mocker.patch("freqtrade.exchange.Exchange.stoploss_limit", side_effect=DependencyException())
    freqtrade.handle_trailing_stoploss_on_exchange(trade, stoploss_order_hanging)
    assert cancel_mock.call_count == 1
    assert log_has_re(r"Could not create trailing stoploss order for pair ETH/BTC\..*", caplog)

def test_process_maybe_execute_sells_exception(mocker, default_conf,
                                               limit_buy_order, caplog) -> None:
    freqtrade = get_patched_freqtradebot(mocker, default_conf)
    mocker.patch('freqtrade.exchange.Exchange.get_order', return_value=limit_buy_order)

    trade = MagicMock()
    trade.open_order_id = '123'
    trade.open_fee = 0.001
    trades = [trade]

    # Test raise of DependencyException exception
    mocker.patch(
        'freqtrade.freqtradebot.FreqtradeBot.update_trade_state',
        side_effect=DependencyException()
    )
    freqtrade.process_maybe_execute_sells(trades)
    assert log_has('Unable to sell trade: ', caplog)

assert prec_satoshi(stats['profit_closed_coin'], 6.217e-05)
    assert prec_satoshi(stats['profit_closed_percent'], 6.2)
    assert prec_satoshi(stats['profit_closed_fiat'], 0.93255)
    assert prec_satoshi(stats['profit_all_coin'], 5.632e-05)
    assert prec_satoshi(stats['profit_all_percent'], 2.81)
    assert prec_satoshi(stats['profit_all_fiat'], 0.8448)
    assert stats['trade_count'] == 2
    assert stats['first_trade_date'] == 'just now'
    assert stats['latest_trade_date'] == 'just now'
    assert stats['avg_duration'] == '0:00:00'
    assert stats['best_pair'] == 'ETH/BTC'
    assert prec_satoshi(stats['best_rate'], 6.2)

    # Test non-available pair
    mocker.patch('freqtrade.exchange.Exchange.fetch_ticker',
                 MagicMock(side_effect=DependencyException(f"Pair 'ETH/BTC' not available")))
    # invalidate ticker cache
    rpc._freqtrade.exchange._cached_ticker = {}
    stats = rpc._rpc_trade_statistics(stake_currency, fiat_display_currency)
    assert stats['trade_count'] == 2
    assert stats['first_trade_date'] == 'just now'
    assert stats['latest_trade_date'] == 'just now'
    assert stats['avg_duration'] == '0:00:00'
    assert stats['best_pair'] == 'ETH/BTC'
    assert prec_satoshi(stats['best_rate'], 6.2)
    assert isnan(stats['profit_all_coin'])

def setup_configuration(args: Namespace) -> Dict[str, Any]:
    """
    Prepare the configuration for the backtesting
    :param args: Cli args from Arguments()
    :return: Configuration
    """
    configuration = Configuration(args)
    config = configuration.get_config()

    # Ensure we do not use Exchange credentials
    config['exchange']['key'] = ''
    config['exchange']['secret'] = ''

    if config['stake_amount'] == constants.UNLIMITED_STAKE_AMOUNT:
        raise DependencyException('stake amount could not be "%s" for backtesting' %
                                  constants.UNLIMITED_STAKE_AMOUNT)

    return config

'open_rate': 1.099e-05,
        'close_rate': None,
        'current_rate': 1.098e-05,
        'amount': 90.99181074,
        'stake_amount': 0.001,
        'close_profit': None,
        'current_profit': -0.59,
        'stop_loss': 0.0,
        'initial_stop_loss': 0.0,
        'initial_stop_loss_pct': None,
        'stop_loss_pct': None,
        'open_order': '(limit buy rem=0.00000000)'
    } == results[0]

    mocker.patch('freqtrade.exchange.Exchange.fetch_ticker',
                 MagicMock(side_effect=DependencyException(f"Pair 'ETH/BTC' not available")))
    # invalidate ticker cache
    rpc._freqtrade.exchange._cached_ticker = {}
    results = rpc._rpc_trade_status()
    assert isnan(results[0]['current_profit'])
    assert isnan(results[0]['current_rate'])
    assert {
        'trade_id': 1,
        'pair': 'ETH/BTC',
        'base_currency': 'BTC',
        'open_date': ANY,
        'open_date_hum': ANY,
        'close_date': None,
        'close_date_hum': None,
        'open_rate': 1.099e-05,
        'close_rate': None,
        'current_rate': ANY,

This should cover cases where get_real_amount() was not able to update the amount
        for whatever reason.
        :param pair: pair - used for logging
        :param amount: amount we expect to be available
        :return: amount to sell
        :raise: DependencyException: if available balance is not within 2% of the available amount.
        """
        wallet_amount = self.wallets.get_free(pair.split('/')[0])
        logger.debug(f"{pair} - Wallet: {wallet_amount} - Trade-amount: {amount}")
        if wallet_amount > amount:
            return amount
        elif wallet_amount > amount * 0.98:
            logger.info(f"{pair} - Falling back to wallet-amount.")
            return wallet_amount
        else:
            raise DependencyException("Not enough amount to sell.")

# Set the precision for amount and price(rate) as accepted by the exchange
            amount = self.symbol_amount_prec(pair, amount)
            needs_price = (ordertype != 'market'
                           or self._api.options.get("createMarketBuyOrderRequiresPrice", False))
            rate = self.symbol_price_prec(pair, rate) if needs_price else None

            return self._api.create_order(pair, ordertype, side,
                                          amount, rate, params)

        except ccxt.InsufficientFunds as e:
            raise DependencyException(
                f'Insufficient funds to create {ordertype} {side} order on market {pair}.'
                f'Tried to {side} amount {amount} at rate {rate}.'
                f'Message: {e}') from e
        except ccxt.InvalidOrder as e:
            raise DependencyException(
                f'Could not create {ordertype} {side} order on market {pair}.'
                f'Tried to {side} amount {amount} at rate {rate}.'
                f'Message: {e}') from e
        except (ccxt.NetworkError, ccxt.ExchangeError) as e:
            raise TemporaryError(
                f'Could not place {side} order due to {e.__class__.__name__}. Message: {e}') from e
        except ccxt.BaseError as e:
            raise OperationalException(e) from e

return order_amount
        amount = 0
        fee_abs = 0
        for exectrade in trades:
            amount += exectrade['amount']
            if ("fee" in exectrade and exectrade['fee'] is not None and
                    (exectrade['fee'].keys() >= {'currency', 'cost'})):
                # only applies if fee is in quote currency!
                if (exectrade['fee']['currency'] is not None and
                        exectrade['fee']['cost'] is not None and
                        trade.pair.startswith(exectrade['fee']['currency'])):
                    fee_abs += exectrade['fee']['cost']

        if not isclose(amount, order_amount, abs_tol=constants.MATH_CLOSE_PREC):
            logger.warning(f"Amount {amount} does not match amount {trade.amount}")
            raise DependencyException("Half bought? Amounts don't match")
        real_amount = amount - fee_abs
        if fee_abs != 0:
            logger.info(f"Applying fee on amount for {trade} "
                        f"(from {order_amount} to {real_amount}) from Trades")
        return real_amount

try:
            params = self._params.copy()
            params.update({'stopPrice': stop_price})

            amount = self.symbol_amount_prec(pair, amount)

            rate = self.symbol_price_prec(pair, rate)

            order = self._api.create_order(pair, ordertype, 'sell',
                                           amount, rate, params)
            logger.info('stoploss limit order added for %s. '
                        'stop price: %s. limit: %s', pair, stop_price, rate)
            return order
        except ccxt.InsufficientFunds as e:
            raise DependencyException(
                f'Insufficient funds to create {ordertype} sell order on market {pair}.'
                f'Tried to sell amount {amount} at rate {rate}. '
                f'Message: {e}') from e
        except ccxt.InvalidOrder as e:
            # Errors:
            # `binance Order would trigger immediately.`
            raise InvalidOrderException(
                f'Could not create {ordertype} sell order on market {pair}. '
                f'Tried to sell amount {amount} at rate {rate}. '
                f'Message: {e}') from e
        except (ccxt.NetworkError, ccxt.ExchangeError) as e:
            raise TemporaryError(
                f'Could not place sell order due to {e.__class__.__name__}. Message: {e}') from e
        except ccxt.BaseError as e:
            raise OperationalException(e) from e