text: #   Copyright (c) 2021 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 sys
  
  sys.path.append("..")
  import numpy as np
  import paddle
  import paddle.fluid as fluid
  from op_test import OpTest
  from op_test_xpu import XPUOpTest
  
  paddle.enable_static()
  
  
  class TestFlattenOp(XPUOpTest):
  
      def setUp(self):
          self.op_type = "flatten"
          self.use_xpu = True
          self.place = paddle.XPUPlace(0)
          self.init_test_case()
          self.inputs = {"X": np.random.random(self.in_shape).astype("float32")}
          self.init_attrs()
          self.outputs = {"Out": self.inputs["X"].reshape(self.new_shape)}
  
      def test_check_output(self):
          self.check_output_with_place(self.place)
  
      def test_check_grad(self):
          self.check_grad_with_place(self.place, ["X"], "Out")
  
      def init_test_case(self):
          self.in_shape = (3, 2, 2, 10)
          self.axis = 1
          self.new_shape = (3, 40)
  
      def init_attrs(self):
          self.attrs = {"axis": self.axis}
  
  
  class TestFlattenOp1(TestFlattenOp):
  
      def init_test_case(self):
          self.in_shape = (3, 2, 2, 10)
          self.axis = 0
          self.new_shape = (1, 120)
  
  
  class TestFlattenOpWithDefaultAxis(TestFlattenOp):
  
      def init_test_case(self):
          self.in_shape = (10, 2, 2, 3)
          self.new_shape = (10, 12)
  
      def init_attrs(self):
          self.attrs = {}
  
  
  class TestFlattenOpSixDims(TestFlattenOp):
  
      def init_test_case(self):
          self.in_shape = (3, 2, 3, 2, 4, 4)
          self.axis = 4
          self.new_shape = (36, 16)
  
  
  if __name__ == "__main__":
      unittest.main()
  