Adding the first exchange (Bitfinex) and unit testing

tests/exchange/base.py

@@ -0,0 +1,27 @@
+import unittest
+import abc
+from abc import ABCMeta
+
+
+class BaseExchangeTestCase():
+    __metaclass__ = ABCMeta
+
+    @abc.abstractmethod
+    def test_order(self):
+        pass
+
+    @abc.abstractmethod
+    def test_cancel_order(self):
+        pass
+
+    @abc.abstractmethod
+    def test_order_status(self):
+        pass
+
+    @abc.abstractmethod
+    def test_balance(self):
+        pass
+
+    @abc.abstractmethod
+    def test_ticker(self):
+        pass

tests/exchange/test_bitfinex.py

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+from catalyst.exchange.bitfinex import Bitfinex
+from .base import BaseExchangeTestCase
+from logbook import Logger
+import pandas as pd
+from catalyst.finance.execution import (MarketOrder,
+                                        LimitOrder,
+                                        StopOrder,
+                                        StopLimitOrder)
+from catalyst.assets._assets import Asset
+
+log = Logger('BitfinexTestCase')
+
+
+class BitfinexTestCase(BaseExchangeTestCase):
+    def test_ticker(self):
+        log.info('fetching ticker from bitfinex')
+        bitfinex = Bitfinex()
+        current_date = pd.Timestamp.utcnow()
+        assets = [
+            Asset(sid=0, exchange=bitfinex.name, symbol='eth_usd'),
+            Asset(sid=1, exchange=bitfinex.name, symbol='etc_usd'),
+            Asset(sid=2, exchange=bitfinex.name, symbol='eos_usd')
+        ]
+        tickers = bitfinex.tickers(date=current_date, assets=assets)
+        log.info('got tickers {}'.format(tickers))
+
+    def test_order(self):
+        log.info('ordering from bitfinex')
+        bitfinex = Bitfinex()
+        asset = Asset(sid=0, exchange=bitfinex.name, symbol='eth_usd')
+        order_id = bitfinex.order(
+            asset=asset,
+            style=LimitOrder(limit_price=200),
+            limit_price=200,
+            amount=1,
+            stop_price=None
+        )
+        log.info('order created {}'.format(order_id))
+
+    def test_cancel_order(self):
+        log.info('canceling order from bitfinex')
+        bitfinex = Bitfinex()
+        response = bitfinex.cancel_order(order_id=2776936269)
+        log.info('canceled order: {}'.format(response))
+
+    def test_order_status(self):
+        log.info('querying orders from bitfinex')
+        bitfinex = Bitfinex()
+        response = bitfinex.order_status(order_id=2776972180)
+        log.info('the orders: {}'.format(response))
+
+    def test_balance(self):
+        log.info('querying positions from bitfinex')
+        bitfinex = Bitfinex()
+        balance = bitfinex.balance(currencies=['usd', 'etc', 'pez'])
+        log.info('the balance: {}'.format(balance))