new_contents: #   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from __future__ import print_function
  
  import unittest
  import numpy as np
  from op_test import OpTest
  
  
  class TestFusionSquaredMatSubOp(OpTest):
      def setUp(self):
          self.op_type = 'fusion_squared_mat_sub'
          self.m = 11
          self.n = 12
          self.k = 4
          self.scalar = 0.5
          self.set_conf()
          matx = np.random.random((self.m, self.k)).astype("float32")
          maty = np.random.random((self.k, self.n)).astype("float32")
  
          self.inputs = {'X': matx, 'Y': maty}
          self.outputs = {
              'Out':
              (np.dot(matx**2, maty**2) - np.dot(matx, maty)**2) * self.scalar
          }
          self.attrs = {'scalar': self.scalar, }
  
      def set_conf(self):
          pass
  
      def test_check_output(self):
          self.check_output()
  
  
  class TestFusionSquaredMatSubOpCase1(TestFusionSquaredMatSubOp):
      def set_conf(self):
          self.scalar = -0.3
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: add squared mat sub unit test