stable/tests/strategy/test_interface.py

# pragma pylint: disable=missing-docstring, C0103

import logging
from unittest.mock import MagicMock

import arrow
import pytest
from pandas import DataFrame

from freqtrade.configuration import TimeRange
from freqtrade.data.history import load_data
from freqtrade.exceptions import StrategyError
from freqtrade.persistence import Trade
from freqtrade.resolvers import StrategyResolver
from freqtrade.strategy.strategy_wrapper import strategy_safe_wrapper
from tests.conftest import get_patched_exchange, log_has, log_has_re

from .strats.default_strategy import DefaultStrategy

# Avoid to reinit the same object again and again
_STRATEGY = DefaultStrategy(config={})


def test_returns_latest_signal(mocker, default_conf, ohlcv_history):
    ohlcv_history.loc[1, 'date'] = arrow.utcnow()
    # Take a copy to correctly modify the call
    mocked_history = ohlcv_history.copy()
    mocked_history['sell'] = 0
    mocked_history['buy'] = 0
    mocked_history.loc[1, 'sell'] = 1

    mocker.patch.object(
        _STRATEGY, '_analyze_ticker_internal',
        return_value=mocked_history
    )

    assert _STRATEGY.get_signal('ETH/BTC', '5m', ohlcv_history) == (False, True)
    mocked_history.loc[1, 'sell'] = 0
    mocked_history.loc[1, 'buy'] = 1

    mocker.patch.object(
        _STRATEGY, '_analyze_ticker_internal',
        return_value=mocked_history
    )
    assert _STRATEGY.get_signal('ETH/BTC', '5m', ohlcv_history) == (True, False)
    mocked_history.loc[1, 'sell'] = 0
    mocked_history.loc[1, 'buy'] = 0

    mocker.patch.object(
        _STRATEGY, '_analyze_ticker_internal',
        return_value=mocked_history
    )
    assert _STRATEGY.get_signal('ETH/BTC', '5m', ohlcv_history) == (False, False)


def test_get_signal_empty(default_conf, mocker, caplog):
    assert (False, False) == _STRATEGY.get_signal('foo', default_conf['ticker_interval'],
                                                  DataFrame())
    assert log_has('Empty candle (OHLCV) data for pair foo', caplog)
    caplog.clear()

    assert (False, False) == _STRATEGY.get_signal('bar', default_conf['ticker_interval'],
                                                  [])
    assert log_has('Empty candle (OHLCV) data for pair bar', caplog)


def test_get_signal_exception_valueerror(default_conf, mocker, caplog, ohlcv_history):
    caplog.set_level(logging.INFO)
    mocker.patch.object(
        _STRATEGY, '_analyze_ticker_internal',
        side_effect=ValueError('xyz')
    )
    assert (False, False) == _STRATEGY.get_signal('foo', default_conf['ticker_interval'],
                                                  ohlcv_history)
    assert log_has_re(r'Strategy caused the following exception: xyz.*', caplog)


def test_get_signal_empty_dataframe(default_conf, mocker, caplog, ohlcv_history):
    caplog.set_level(logging.INFO)
    mocker.patch.object(
        _STRATEGY, '_analyze_ticker_internal',
        return_value=DataFrame([])
    )
    mocker.patch.object(_STRATEGY, 'assert_df')

    assert (False, False) == _STRATEGY.get_signal('xyz', default_conf['ticker_interval'],
                                                  ohlcv_history)
    assert log_has('Empty dataframe for pair xyz', caplog)


def test_get_signal_old_dataframe(default_conf, mocker, caplog, ohlcv_history):
    # default_conf defines a 5m interval. we check interval * 2 + 5m
    # this is necessary as the last candle is removed (partial candles) by default
    ohlcv_history.loc[1, 'date'] = arrow.utcnow().shift(minutes=-16)
    # Take a copy to correctly modify the call
    mocked_history = ohlcv_history.copy()
    mocked_history['sell'] = 0
    mocked_history['buy'] = 0
    mocked_history.loc[1, 'buy'] = 1

    caplog.set_level(logging.INFO)
    mocker.patch.object(
        _STRATEGY, '_analyze_ticker_internal',
        return_value=mocked_history
    )
    mocker.patch.object(_STRATEGY, 'assert_df')
    assert (False, False) == _STRATEGY.get_signal('xyz', default_conf['ticker_interval'],
                                                  ohlcv_history)
    assert log_has('Outdated history for pair xyz. Last tick is 16 minutes old', caplog)


def test_assert_df_raise(default_conf, mocker, caplog, ohlcv_history):
    # default_conf defines a 5m interval. we check interval * 2 + 5m
    # this is necessary as the last candle is removed (partial candles) by default
    ohlcv_history.loc[1, 'date'] = arrow.utcnow().shift(minutes=-16)
    # Take a copy to correctly modify the call
    mocked_history = ohlcv_history.copy()
    mocked_history['sell'] = 0
    mocked_history['buy'] = 0
    mocked_history.loc[1, 'buy'] = 1

    caplog.set_level(logging.INFO)
    mocker.patch.object(
        _STRATEGY, 'assert_df',
        side_effect=StrategyError('Dataframe returned...')
    )
    assert (False, False) == _STRATEGY.get_signal('xyz', default_conf['ticker_interval'],
                                                  ohlcv_history)
    assert log_has('Unable to analyze candle (OHLCV) data for pair xyz: Dataframe returned...',
                   caplog)


def test_assert_df(default_conf, mocker, ohlcv_history, caplog):
    # Ensure it's running when passed correctly
    _STRATEGY.assert_df(ohlcv_history, len(ohlcv_history),
                        ohlcv_history.loc[1, 'close'], ohlcv_history.loc[1, 'date'])

    with pytest.raises(StrategyError, match=r"Dataframe returned from strategy.*length\."):
        _STRATEGY.assert_df(ohlcv_history, len(ohlcv_history) + 1,
                            ohlcv_history.loc[1, 'close'], ohlcv_history.loc[1, 'date'])

    with pytest.raises(StrategyError,
                       match=r"Dataframe returned from strategy.*last close price\."):
        _STRATEGY.assert_df(ohlcv_history, len(ohlcv_history),
                            ohlcv_history.loc[1, 'close'] + 0.01, ohlcv_history.loc[1, 'date'])
    with pytest.raises(StrategyError,
                       match=r"Dataframe returned from strategy.*last date\."):
        _STRATEGY.assert_df(ohlcv_history, len(ohlcv_history),
                            ohlcv_history.loc[1, 'close'], ohlcv_history.loc[0, 'date'])

    _STRATEGY.disable_dataframe_checks = True
    caplog.clear()
    _STRATEGY.assert_df(ohlcv_history, len(ohlcv_history),
                        ohlcv_history.loc[1, 'close'], ohlcv_history.loc[0, 'date'])
    assert log_has_re(r"Dataframe returned from strategy.*last date\.", caplog)
    # reset to avoid problems in other tests due to test leakage
    _STRATEGY.disable_dataframe_checks = False


def test_get_signal_handles_exceptions(mocker, default_conf):
    exchange = get_patched_exchange(mocker, default_conf)
    mocker.patch.object(
        _STRATEGY, 'analyze_ticker',
        side_effect=Exception('invalid ticker history ')
    )
    assert _STRATEGY.get_signal(exchange, 'ETH/BTC', '5m') == (False, False)


def test_ohlcvdata_to_dataframe(default_conf, testdatadir) -> None:
    default_conf.update({'strategy': 'DefaultStrategy'})
    strategy = StrategyResolver.load_strategy(default_conf)

    timerange = TimeRange.parse_timerange('1510694220-1510700340')
    data = load_data(testdatadir, '1m', ['UNITTEST/BTC'], timerange=timerange,
                     fill_up_missing=True)
    processed = strategy.ohlcvdata_to_dataframe(data)
    assert len(processed['UNITTEST/BTC']) == 102  # partial candle was removed


def test_ohlcvdata_to_dataframe_copy(mocker, default_conf, testdatadir) -> None:
    default_conf.update({'strategy': 'DefaultStrategy'})
    strategy = StrategyResolver.load_strategy(default_conf)
    aimock = mocker.patch('freqtrade.strategy.interface.IStrategy.advise_indicators')
    timerange = TimeRange.parse_timerange('1510694220-1510700340')
    data = load_data(testdatadir, '1m', ['UNITTEST/BTC'], timerange=timerange,
                     fill_up_missing=True)
    strategy.ohlcvdata_to_dataframe(data)
    assert aimock.call_count == 1
    # Ensure that a copy of the dataframe is passed to advice_indicators
    assert aimock.call_args_list[0][0][0] is not data


def test_min_roi_reached(default_conf, fee) -> None:

    # Use list to confirm sequence does not matter
    min_roi_list = [{20: 0.05, 55: 0.01, 0: 0.1},
                    {0: 0.1, 20: 0.05, 55: 0.01}]
    for roi in min_roi_list:
        default_conf.update({'strategy': 'DefaultStrategy'})
        strategy = StrategyResolver.load_strategy(default_conf)
        strategy.minimal_roi = roi
        trade = Trade(
            pair='ETH/BTC',
            stake_amount=0.001,
            amount=5,
            open_date=arrow.utcnow().shift(hours=-1).datetime,
            fee_open=fee.return_value,
            fee_close=fee.return_value,
            exchange='bittrex',
            open_rate=1,
        )

        assert not strategy.min_roi_reached(trade, 0.02, arrow.utcnow().shift(minutes=-56).datetime)
        assert strategy.min_roi_reached(trade, 0.12, arrow.utcnow().shift(minutes=-56).datetime)

        assert not strategy.min_roi_reached(trade, 0.04, arrow.utcnow().shift(minutes=-39).datetime)
        assert strategy.min_roi_reached(trade, 0.06, arrow.utcnow().shift(minutes=-39).datetime)

        assert not strategy.min_roi_reached(trade, -0.01, arrow.utcnow().shift(minutes=-1).datetime)
        assert strategy.min_roi_reached(trade, 0.02, arrow.utcnow().shift(minutes=-1).datetime)


def test_min_roi_reached2(default_conf, fee) -> None:

    # test with ROI raising after last interval
    min_roi_list = [{20: 0.07,
                     30: 0.05,
                     55: 0.30,
                     0: 0.1
                     },
                    {0: 0.1,
                     20: 0.07,
                     30: 0.05,
                     55: 0.30
                     },
                    ]
    for roi in min_roi_list:
        default_conf.update({'strategy': 'DefaultStrategy'})
        strategy = StrategyResolver.load_strategy(default_conf)
        strategy.minimal_roi = roi
        trade = Trade(
            pair='ETH/BTC',
            stake_amount=0.001,
            amount=5,
            open_date=arrow.utcnow().shift(hours=-1).datetime,
            fee_open=fee.return_value,
            fee_close=fee.return_value,
            exchange='bittrex',
            open_rate=1,
        )

        assert not strategy.min_roi_reached(trade, 0.02, arrow.utcnow().shift(minutes=-56).datetime)
        assert strategy.min_roi_reached(trade, 0.12, arrow.utcnow().shift(minutes=-56).datetime)

        assert not strategy.min_roi_reached(trade, 0.04, arrow.utcnow().shift(minutes=-39).datetime)
        assert strategy.min_roi_reached(trade, 0.071, arrow.utcnow().shift(minutes=-39).datetime)

        assert not strategy.min_roi_reached(trade, 0.04, arrow.utcnow().shift(minutes=-26).datetime)
        assert strategy.min_roi_reached(trade, 0.06, arrow.utcnow().shift(minutes=-26).datetime)

        # Should not trigger with 20% profit since after 55 minutes only 30% is active.
        assert not strategy.min_roi_reached(trade, 0.20, arrow.utcnow().shift(minutes=-2).datetime)
        assert strategy.min_roi_reached(trade, 0.31, arrow.utcnow().shift(minutes=-2).datetime)


def test_min_roi_reached3(default_conf, fee) -> None:

    # test for issue #1948
    min_roi = {20: 0.07,
               30: 0.05,
               55: 0.30,
               }
    default_conf.update({'strategy': 'DefaultStrategy'})
    strategy = StrategyResolver.load_strategy(default_conf)
    strategy.minimal_roi = min_roi
    trade = Trade(
            pair='ETH/BTC',
            stake_amount=0.001,
            amount=5,
            open_date=arrow.utcnow().shift(hours=-1).datetime,
            fee_open=fee.return_value,
            fee_close=fee.return_value,
            exchange='bittrex',
            open_rate=1,
    )

    assert not strategy.min_roi_reached(trade, 0.02, arrow.utcnow().shift(minutes=-56).datetime)
    assert not strategy.min_roi_reached(trade, 0.12, arrow.utcnow().shift(minutes=-56).datetime)

    assert not strategy.min_roi_reached(trade, 0.04, arrow.utcnow().shift(minutes=-39).datetime)
    assert strategy.min_roi_reached(trade, 0.071, arrow.utcnow().shift(minutes=-39).datetime)

    assert not strategy.min_roi_reached(trade, 0.04, arrow.utcnow().shift(minutes=-26).datetime)
    assert strategy.min_roi_reached(trade, 0.06, arrow.utcnow().shift(minutes=-26).datetime)

    # Should not trigger with 20% profit since after 55 minutes only 30% is active.
    assert not strategy.min_roi_reached(trade, 0.20, arrow.utcnow().shift(minutes=-2).datetime)
    assert strategy.min_roi_reached(trade, 0.31, arrow.utcnow().shift(minutes=-2).datetime)


def test_analyze_ticker_default(ohlcv_history, mocker, caplog) -> None:
    caplog.set_level(logging.DEBUG)
    ind_mock = MagicMock(side_effect=lambda x, meta: x)
    buy_mock = MagicMock(side_effect=lambda x, meta: x)
    sell_mock = MagicMock(side_effect=lambda x, meta: x)
    mocker.patch.multiple(
        'freqtrade.strategy.interface.IStrategy',
        advise_indicators=ind_mock,
        advise_buy=buy_mock,
        advise_sell=sell_mock,

    )
    strategy = DefaultStrategy({})
    strategy.analyze_ticker(ohlcv_history, {'pair': 'ETH/BTC'})
    assert ind_mock.call_count == 1
    assert buy_mock.call_count == 1
    assert buy_mock.call_count == 1

    assert log_has('TA Analysis Launched', caplog)
    assert not log_has('Skipping TA Analysis for already analyzed candle', caplog)
    caplog.clear()

    strategy.analyze_ticker(ohlcv_history, {'pair': 'ETH/BTC'})
    # No analysis happens as process_only_new_candles is true
    assert ind_mock.call_count == 2
    assert buy_mock.call_count == 2
    assert buy_mock.call_count == 2
    assert log_has('TA Analysis Launched', caplog)
    assert not log_has('Skipping TA Analysis for already analyzed candle', caplog)


def test__analyze_ticker_internal_skip_analyze(ohlcv_history, mocker, caplog) -> None:
    caplog.set_level(logging.DEBUG)
    ind_mock = MagicMock(side_effect=lambda x, meta: x)
    buy_mock = MagicMock(side_effect=lambda x, meta: x)
    sell_mock = MagicMock(side_effect=lambda x, meta: x)
    mocker.patch.multiple(
        'freqtrade.strategy.interface.IStrategy',
        advise_indicators=ind_mock,
        advise_buy=buy_mock,
        advise_sell=sell_mock,

    )
    strategy = DefaultStrategy({})
    strategy.process_only_new_candles = True

    ret = strategy._analyze_ticker_internal(ohlcv_history, {'pair': 'ETH/BTC'})
    assert 'high' in ret.columns
    assert 'low' in ret.columns
    assert 'close' in ret.columns
    assert isinstance(ret, DataFrame)
    assert ind_mock.call_count == 1
    assert buy_mock.call_count == 1
    assert buy_mock.call_count == 1
    assert log_has('TA Analysis Launched', caplog)
    assert not log_has('Skipping TA Analysis for already analyzed candle', caplog)
    caplog.clear()

    ret = strategy._analyze_ticker_internal(ohlcv_history, {'pair': 'ETH/BTC'})
    # No analysis happens as process_only_new_candles is true
    assert ind_mock.call_count == 1
    assert buy_mock.call_count == 1
    assert buy_mock.call_count == 1
    # only skipped analyze adds buy and sell columns, otherwise it's all mocked
    assert 'buy' in ret.columns
    assert 'sell' in ret.columns
    assert ret['buy'].sum() == 0
    assert ret['sell'].sum() == 0
    assert not log_has('TA Analysis Launched', caplog)
    assert log_has('Skipping TA Analysis for already analyzed candle', caplog)


def test_is_pair_locked(default_conf):
    default_conf.update({'strategy': 'DefaultStrategy'})
    strategy = StrategyResolver.load_strategy(default_conf)
    # dict should be empty
    assert not strategy._pair_locked_until

    pair = 'ETH/BTC'
    assert not strategy.is_pair_locked(pair)
    strategy.lock_pair(pair, arrow.utcnow().shift(minutes=4).datetime)
    # ETH/BTC locked for 4 minutes
    assert strategy.is_pair_locked(pair)

    # Test lock does not change
    lock = strategy._pair_locked_until[pair]
    strategy.lock_pair(pair, arrow.utcnow().shift(minutes=2).datetime)
    assert lock == strategy._pair_locked_until[pair]

    # XRP/BTC should not be locked now
    pair = 'XRP/BTC'
    assert not strategy.is_pair_locked(pair)

    # Unlocking a pair that's not locked should not raise an error
    strategy.unlock_pair(pair)

    # Unlock original pair
    pair = 'ETH/BTC'
    strategy.unlock_pair(pair)
    assert not strategy.is_pair_locked(pair)


@pytest.mark.parametrize('error', [
    ValueError, KeyError, Exception,
])
def test_strategy_safe_wrapper_error(caplog, error):
    def failing_method():
        raise error('This is an error.')

    def working_method(argumentpassedin):
        return argumentpassedin

    with pytest.raises(StrategyError, match=r'This is an error.'):
        strategy_safe_wrapper(failing_method, message='DeadBeef')()

    assert log_has_re(r'DeadBeef.*', caplog)
    ret = strategy_safe_wrapper(failing_method, message='DeadBeef', default_retval=True)()

    assert isinstance(ret, bool)
    assert ret


@pytest.mark.parametrize('value', [
    1, 22, 55, True, False, {'a': 1, 'b': '112'},
    [1, 2, 3, 4], (4, 2, 3, 6)
])
def test_strategy_safe_wrapper(value):

    def working_method(argumentpassedin):
        return argumentpassedin

    ret = strategy_safe_wrapper(working_method, message='DeadBeef')(value)

    assert type(ret) == type(value)
    assert ret == value