code: def test_init():
      BTC = Instrument("BTC", 8, "Bitcoin")
      assert BTC
      assert BTC.symbol == "BTC"
      assert BTC.precision == 8
      assert BTC.name == "Bitcoin"
  
file_path: tensortrade/tests/tensortrade/unit/oms/instruments/test_instrument.py
imports: import pytest
  from tensortrade.oms.instruments import Instrument, Quantity
  from tensortrade.core.exceptions import InvalidTradingPair
label_desc: Use image node_id 1 for calling a global function with example usage: test_init() without return types