Revert "Fix migrations tests"

This reverts commit 1386d02.

tests/migrations/conftest.py

@@ -3,12 +3,49 @@
 import tempfile
 import logging
 
-from sqlalchemy import create_engine
+from sqlalchemy import create_engine, Column, String, Integer, Float
+from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import sessionmaker
 
 log = logging.getLogger("dexbot")
 log.setLevel(logging.DEBUG)
 
+Base = declarative_base()
+
+# Classes are represent initial table structure
+
+
+class Config(Base):
+    __tablename__ = 'config'
+
+    id = Column(Integer, primary_key=True)
+    category = Column(String)
+    key = Column(String)
+    value = Column(String)
+
+
+class Orders(Base):
+    __tablename__ = 'orders'
+
+    id = Column(Integer, primary_key=True)
+    worker = Column(String)
+    order_id = Column(String)
+    order = Column(String)
+
+
+class Balances(Base):
+    __tablename__ = 'balances'
+
+    id = Column(Integer, primary_key=True)
+    account = Column(String)
+    worker = Column(String)
+    base_total = Column(Float)
+    base_symbol = Column(String)
+    quote_total = Column(Float)
+    quote_symbol = Column(String)
+    center_price = Column(Float)
+    timestamp = Column(Integer)
+
 
 @pytest.fixture
 def initial_db():
@@ -17,6 +54,7 @@ def initial_db():
     engine = create_engine('sqlite:///{}'.format(db_file), echo=False)
     Session = sessionmaker(bind=engine)
     session = Session()
+    Base.metadata.create_all(engine)
     session.commit()
     log.debug('Prepared db on {}'.format(db_file))