def test_different_rouge(self):
     ref = "this is a string"
     self.assertDictClose(metrics.rouge([ref, ref], ["", ""]), {
         "rouge1": 0,
         "rouge2": 0,
         "rougeLsum": 0
     })
 def test_same_rouge(self):
     ref = "this is a string"
     self.assertDictClose(metrics.rouge([ref, ref], [ref, ref]), {
         "rouge1": 100,
         "rouge2": 100,
         "rougeLsum": 100
     })