class_docstr: Slippage model that fills a constant number of shares per tick, for
  testing purposes.
  
  Parameters
  ----------
  filled_per_tick : int or TestingSlippage.ALL
      The number of shares to fill on each call to process_order. If
      TestingSlippage.ALL is passed, the entire order is filled.
  
  See also
  --------
  zipline.finance.slippage.SlippageModel
code: def __init__(self, filled_per_tick):
      super(TestingSlippage, self).__init__()
      self.filled_per_tick = filled_per_tick
  
imports: from zipline.assets import Equity
  from zipline.finance.slippage import SlippageModel
  from zipline.utils.sentinel import sentinel
label_desc: Use image node_id 1 to create a new TestingSlippage object from inherited base classes: SlippageModel with example: obj = TestingSlippage(filled_per_tick)