code: def test_str():
      criteria = Limit(limit_price=7000.00)
      assert str(criteria) == "<Limit: price={0}>".format(7000.00)
  
imports: import unittest.mock
  from tensortrade.oms.orders.criteria import Limit
  from tensortrade.oms.instruments import USD, BTC
  from tensortrade.oms.orders import TradeSide
label_desc: Use image node_id 4 for calling a global function with example usage: test_str() without return types