code: def testSummarizeArrayDiffs(self, lhs, rhs, expected):
      a = np.array(lhs)
      b = np.array(rhs)
      result = np_util.summarize_array_diffs(a, b)
      self.assertEqual(result, expected)
  
imports: from absl.testing import absltest
  from absl.testing import parameterized
  import numpy
  from pysc2.lib import np_util
label_desc: Use image node_id 1 for calling the NpUtilTest obj's underlying member method code with example usage: obj.testSummarizeArrayDiffs(lhs, rhs, expected) without return types