code: def testDecodeWithSparseOutput(self, texts, expected):
      input_tensor = np.array(
          _nested_encode(texts, "UTF-8"), dtype=bytes
      )
      result = ragged_string_ops.unicode_decode(
          input_tensor, "UTF-8"
      ).to_sparse()
      self.assertIsInstance(result, sparse_tensor.SparseTensor)
      self.assertAllEqual(expected.indices, result.indices)
      self.assertAllEqual(expected.values, result.values)
      self.assertAllEqual(expected.dense_shape, result.dense_shape)
  
imports: from absl.testing import parameterized
  import numpy
  from tensorflow.python.eager import context
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import sparse_tensor
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gen_string_ops
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.ragged import ragged_string_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 8 for calling the UnicodeDecodeTest obj's underlying member method code with example usage: obj.testDecodeWithSparseOutput(texts, expected) without return types