code: def testNinjaTraderSMA(self):
      common.test_from_csv(
          self, "nt-sma-15.csv", lambda inputDS: ma.SMA(inputDS, 15), 3
      )
  
imports: from six.moves import xrange
  from .None import common
  from pyalgotrade.technical import ma
  from pyalgotrade import dataseries
  from pyalgotrade.barfeed import ninjatraderfeed
  from pyalgotrade import bar
label_desc: Use image node_id 8 for calling the SMATestCase obj's underlying member method code with example usage: obj.testNinjaTraderSMA() without return types