code: def test_sequence_accuracy(self):
      s1 = "this is a string."
      s2 = "this is a completely different string."
      self.assertDictEqual(
          metrics.sequence_accuracy([s1, s2], [s1, s1]),
          {"sequence_accuracy": 50},
      )
  
imports: from unittest import mock
  from absl.testing import absltest
  import numpy
  import seqio
  import sklearn.metrics
  from t5.evaluation import metrics
  from t5.evaluation import test_utils
label_desc: Use image node_id 14 for calling the MetricsTest obj's underlying member method code with example usage: obj.test_sequence_accuracy() without return types