Merge pull request #353 from kryofly/test_exchange_bittrex

test: increase coverage of exchange.bittrex
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Gérald LONLAS 2018-01-09 17:26:38 -08:00 committed by GitHub
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# pragma pylint: disable=missing-docstring,C0103
import pytest
from unittest.mock import MagicMock
from requests.exceptions import ContentDecodingError
from freqtrade.exchange import Bittrex
from freqtrade.exchange.bittrex import Bittrex
import freqtrade.exchange.bittrex as btx
# Eat this flake8
# +------------------+
# | bittrex.Bittrex |
# +------------------+
# |
# (mock Fake_bittrex)
# |
# +-----------------------------+
# | freqtrade.exchange.Bittrex |
# +-----------------------------+
# Call into Bittrex will flow up to the
# external package bittrex.Bittrex.
# By inserting a mock, we redirect those
# calls.
# The faked bittrex API is called just 'fb'
# The freqtrade.exchange.Bittrex is a
# wrapper, and is called 'wb'
def _stub_config():
return {'key': '',
'secret': ''}
class Fake_bittrex():
def __init__(self, success=True):
self.success = True # Believe in yourself
self.result = None
self.get_ticker_call_count = 0
# This is really ugly, doing side-effect during instance creation
# But we're allowed to in testing-code
btx._API = MagicMock()
btx._API.buy_limit = self.fake_buysell_limit
btx._API.sell_limit = self.fake_buysell_limit
btx._API.get_balance = self.fake_get_balance
btx._API.get_balances = self.fake_get_balances
btx._API.get_ticker = self.fake_get_ticker
btx._API.get_order = self.fake_get_order
btx._API.cancel = self.fake_cancel_order
btx._API.get_markets = self.fake_get_markets
btx._API.get_market_summaries = self.fake_get_market_summaries
btx._API_V2 = MagicMock()
btx._API_V2.get_candles = self.fake_get_candles
btx._API_V2.get_wallet_health = self.fake_get_wallet_health
def fake_buysell_limit(self, pair, amount, limit):
return {'success': self.success,
'result': {'uuid': '1234'},
'message': 'barter'}
def fake_get_balance(self, cur):
return {'success': self.success,
'result': {'Balance': 1234},
'message': 'unbalanced'}
def fake_get_balances(self):
return {'success': self.success,
'result': [{'BTC_ETH': 1234}],
'message': 'no balances'}
def fake_get_ticker(self, pair):
self.get_ticker_call_count += 1
return self.result or {'success': self.success,
'result': {'Bid': 1, 'Ask': 1, 'Last': 1},
'message': 'NO_API_RESPONSE'}
def fake_get_candles(self, pair, interval):
return self.result or {'success': self.success,
'result': [{'C': 0, 'V': 0, 'O': 0, 'H': 0, 'L': 0, 'T': 0}],
'message': 'candles lit'}
def fake_get_order(self, uuid):
return {'success': self.success,
'result': {'OrderUuid': 'ABC123',
'Type': 'Type',
'Exchange': 'BTC_ETH',
'Opened': True,
'PricePerUnit': 1,
'Quantity': 1,
'QuantityRemaining': 1,
'Closed': True
},
'message': 'lost'}
def fake_cancel_order(self, uuid):
return self.result or {'success': self.success,
'message': 'no such order'}
def fake_get_markets(self):
return self.result or {'success': self.success,
'message': 'market gone',
'result': [{'MarketName': '-_'}]}
def fake_get_market_summaries(self):
return self.result or {'success': self.success,
'message': 'no summary',
'result': ['sum']}
def fake_get_wallet_health(self):
return self.result or {'success': self.success,
'message': 'bad health',
'result': [{'Health': {'Currency': 'BTC_ETH',
'IsActive': True,
'LastChecked': 0},
'Currency': {'Notice': True}}]}
# The freqtrade.exchange.bittrex is called wrap_bittrex
# to not confuse naming with bittrex.bittrex
def make_wrap_bittrex():
conf = _stub_config()
wb = btx.Bittrex(conf)
return wb
def test_exchange_bittrex_class():
conf = _stub_config()
b = Bittrex(conf)
assert isinstance(b, Bittrex)
slots = dir(b)
for name in ['fee', 'buy', 'sell', 'get_balance', 'get_balances',
'get_ticker', 'get_ticker_history', 'get_order',
'cancel_order', 'get_pair_detail_url', 'get_markets',
'get_market_summaries', 'get_wallet_health']:
assert name in slots
# FIX: ensure that the slot is also a method in the class
# getattr(b, name) => bound method Bittrex.buy
# type(getattr(b, name)) => class 'method'
def test_exchange_bittrex_fee():
fee = Bittrex.fee.__get__(Bittrex)
assert fee >= 0 and fee < 0.1 # Fee is 0-10 %
def test_exchange_bittrex_buy_good(mocker):
wb = make_wrap_bittrex()
fb = Fake_bittrex()
uuid = wb.buy('BTC_ETH', 1, 1)
assert uuid == fb.fake_buysell_limit(1, 2, 3)['result']['uuid']
fb.success = False
with pytest.raises(btx.OperationalException, match=r'barter.*'):
wb.buy('BAD', 1, 1)
def test_exchange_bittrex_sell_good(mocker):
wb = make_wrap_bittrex()
fb = Fake_bittrex()
uuid = wb.sell('BTC_ETH', 1, 1)
assert uuid == fb.fake_buysell_limit(1, 2, 3)['result']['uuid']
fb.success = False
with pytest.raises(btx.OperationalException, match=r'barter.*'):
uuid = wb.sell('BAD', 1, 1)
def test_exchange_bittrex_get_balance(mocker):
wb = make_wrap_bittrex()
fb = Fake_bittrex()
bal = wb.get_balance('BTC_ETH')
assert bal == fb.fake_get_balance(1)['result']['Balance']
fb.success = False
with pytest.raises(btx.OperationalException, match=r'unbalanced'):
wb.get_balance('BTC_ETH')
def test_exchange_bittrex_get_balances():
wb = make_wrap_bittrex()
fb = Fake_bittrex()
bals = wb.get_balances()
assert bals == fb.fake_get_balances()['result']
fb.success = False
with pytest.raises(btx.OperationalException, match=r'no balances'):
wb.get_balances()
def test_exchange_bittrex_get_ticker():
wb = make_wrap_bittrex()
fb = Fake_bittrex()
# Poll ticker, which updates the cache
tick = wb.get_ticker('BTC_ETH')
for x in ['bid', 'ask', 'last']:
assert x in tick
# Ensure the side-effect was made (update the ticker cache)
assert 'BTC_ETH' in wb.cached_ticker.keys()
# taint the cache, so we can recognize the cache wall utilized
wb.cached_ticker['BTC_ETH']['bid'] = 1234
# Poll again, getting the cached result
fb.get_ticker_call_count = 0
tick = wb.get_ticker('BTC_ETH', False)
# Ensure the result was from the cache, and that we didn't call exchange
assert wb.cached_ticker['BTC_ETH']['bid'] == 1234
assert fb.get_ticker_call_count == 0
def test_exchange_bittrex_get_ticker_bad():
wb = make_wrap_bittrex()
fb = Fake_bittrex()
fb.result = {'success': True,
'result': {'Bid': 1}} # incomplete result
with pytest.raises(ContentDecodingError, match=r'.*Got invalid response from bittrex params.*'):
wb.get_ticker('BTC_ETH')
fb.result = {'success': False,
'message': 'gone bad'
}
with pytest.raises(btx.OperationalException, match=r'.*gone bad.*'):
wb.get_ticker('BTC_ETH')
def test_exchange_bittrex_get_ticker_historyOne():
wb = make_wrap_bittrex()
Fake_bittrex()
assert wb.get_ticker_history('BTC_ETH', 1)
def test_exchange_bittrex_get_ticker_history():
wb = make_wrap_bittrex()
fb = Fake_bittrex()
assert wb.get_ticker_history('BTC_ETH', 5)
with pytest.raises(ValueError, match=r'.*Cannot parse tick_interval.*'):
wb.get_ticker_history('BTC_ETH', 2)
fb.success = False
with pytest.raises(btx.OperationalException, match=r'candles lit.*'):
wb.get_ticker_history('BTC_ETH', 5)
fb.success = True
with pytest.raises(ContentDecodingError, match=r'.*Got invalid response from bittrex.*'):
fb.result = {'bad': 0}
wb.get_ticker_history('BTC_ETH', 5)
with pytest.raises(ContentDecodingError, match=r'.*Required property C not present.*'):
fb.result = {'success': True,
'result': [{'V': 0, 'O': 0, 'H': 0, 'L': 0, 'T': 0}], # close is missing
'message': 'candles lit'}
wb.get_ticker_history('BTC_ETH', 5)
def test_exchange_bittrex_get_order():
wb = make_wrap_bittrex()
fb = Fake_bittrex()
order = wb.get_order('someUUID')
assert order['id'] == 'ABC123'
fb.success = False
with pytest.raises(btx.OperationalException, match=r'lost'):
wb.get_order('someUUID')
def test_exchange_bittrex_cancel_order():
wb = make_wrap_bittrex()
fb = Fake_bittrex()
wb.cancel_order('someUUID')
with pytest.raises(btx.OperationalException, match=r'no such order'):
fb.success = False
wb.cancel_order('someUUID')
# Note: this can be a bug in exchange.bittrex._validate_response
with pytest.raises(KeyError):
fb.result = {'success': False} # message is missing!
wb.cancel_order('someUUID')
with pytest.raises(btx.OperationalException, match=r'foo'):
fb.result = {'success': False, 'message': 'foo'}
wb.cancel_order('someUUID')
def test_exchange_get_pair_detail_url():
wb = make_wrap_bittrex()
assert wb.get_pair_detail_url('BTC_ETH')
def test_exchange_get_markets():
wb = make_wrap_bittrex()
fb = Fake_bittrex()
x = wb.get_markets()
assert x == ['__']
with pytest.raises(btx.OperationalException, match=r'market gone'):
fb.success = False
wb.get_markets()
def test_exchange_get_market_summaries():
wb = make_wrap_bittrex()
fb = Fake_bittrex()
assert ['sum'] == wb.get_market_summaries()
with pytest.raises(btx.OperationalException, match=r'no summary'):
fb.success = False
wb.get_market_summaries()
def test_exchange_get_wallet_health():
wb = make_wrap_bittrex()
fb = Fake_bittrex()
x = wb.get_wallet_health()
assert x[0]['Currency'] == 'BTC_ETH'
with pytest.raises(btx.OperationalException, match=r'bad health'):
fb.success = False
wb.get_wallet_health()
def test_validate_response_success():