def testEmptyHeadDFReturnsHeadDataFame(self):
     stocksData ={
     }
     npsy = NumpySciPy()
     df = npsy.initDataFrame(stocksData)
     actual = npsy.headDF(df)
     expected = pd.DataFrame(stocksData).head()
 def testHeadDFReturnsHeadDataFame(self):
     stocksData ={
         "Blackstone":[49.56,50.70,51.18,52.80,52.87],
         "KKR": [24.24,24.60,26.04,26.90,26.66]
     }
     dates = ['5/4/20','5/5/20','5/6/20','5/8/20','5/9/20']
     npsy = NumpySciPy()
     df = npsy.initDataFrame(stocksData,rows=dates)
     actual = npsy.headDF(df)
     expected = pd.DataFrame(stocksData,index=dates).head()