message: Add test case for shape function of tf.sparse_concat
diff: @@ -337,6 +337,13 @@ class SparseConcatTest(test.TestCase):
  self.assertEqual(sp_concat.values.get_shape().as_list(), [None])
  self.assertEqual(sp_concat.dense_shape.get_shape(), [3])
  + def testConcatShape(self):
  + # Test case for GitHub 21964.
  + x = sparse_tensor.SparseTensor(indices=[[0,0],[1,1]], values=[1,2], dense_shape=[2,2])
  + y = sparse_tensor.SparseTensor(indices=[[0,0],[1,1]], values=[1,2], dense_shape=[2,2])
  + z = sparse_ops.sparse_concat(-1, [x,y])
  + self.assertEqual(z.get_shape().as_list(), [2, 4])
  +
  if __name__ == "__main__":
  test.main()
  