code: def testAddSelfAndNegation(self):
      with test_util.force_cpu():
          sp_a = self._SparseTensor_3x3()
          sp_b = self._SparseTensor_3x3(negate=True)
  
          sp_sum = sparse_ops.sparse_add(sp_a, sp_b, 0.1)
          sum_out = self.evaluate(sp_sum)
  
          self.assertEqual(sp_sum.dense_shape.get_shape(), [2])
          self.assertAllEqual(sum_out.indices, np.empty([0, 2]))
          self.assertAllEqual(sum_out.values, [])
          self.assertAllEqual(sum_out.dense_shape, [3, 3])
  
imports: import timeit
  import numpy
  from tensorflow.python.client import session
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors_impl
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import sparse_tensor
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import gradient_checker
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import sparse_ops
  import tensorflow.python.ops.sparse_grad
  from tensorflow.python.platform import test
label_desc: Use image node_id 6 for calling the SparseAddTest obj's underlying member method code with example usage: obj.testAddSelfAndNegation() without return types