code: def testWILLR(self):
      barDs = self.__loadBarDS()
      self.assertAmountsAreEqual(
          indicator.WILLR(barDs, 252, 14)[13], -90.1943
      )
      self.assertAmountsAreEqual(
          indicator.WILLR(barDs, 252, 14)[13 + 112], 0
      )
  
imports: import datetime
  import talib
  from six.moves import xrange
  from .None import common
  from pyalgotrade.talibext import indicator
  from pyalgotrade import bar
  from pyalgotrade import dataseries
  from pyalgotrade.dataseries import bards
label_desc: Use image node_id 56 for calling the TestCase obj's underlying member method code with example usage: obj.testWILLR() without return types