#   Copyright (c) 2020 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
import struct

import paddle.fluid.core as core
from paddle.fluid.tests.unittests.op_test import OpTest, convert_float_to_uint16
from paddle import enable_static


@unittest.skipIf(not core.supports_bfloat16(),
                 "place does not support BF16 evaluation")
class TestReshapeBf16Op(OpTest):

    def setUp(self):
        self.op_type = "reshape2"
        self.use_mkldnn = False
        self.mkldnn_data_type = "bfloat16"
        self.init_data()
        self.init_input_data()

        self.inputs = {'X': self.input_data}
        self.attrs = {
            'shape': self.new_shape,
            'use_mkldnn': self.use_mkldnn,
            'mkldnn_data_type': self.mkldnn_data_type
        }
        self.outputs = {
            "Out": self.inputs["X"].reshape(self.infered_shape),
            'XShape': np.random.random(self.ori_shape).astype(np.float32)
        }

    def init_data(self):
        self.ori_shape = (10, 2, 6)
        self.new_shape = (10, 0, 3, -1)
        self.infered_shape = (10, 2, 3, -1)

    def init_input_data(self):
        self.input_data_fp32 = np.random.random(self.ori_shape).astype(
            np.float32)
        self.input_data = convert_float_to_uint16(self.input_data_fp32)

    def test_check_output(self):
        self.check_output_with_place(core.CPUPlace(), no_check_set=['XShape'])

    def test_check_grad(self):
        self.check_grad_with_place(core.CPUPlace(), ["X"],
                                   "Out",
                                   check_dygraph=False,
                                   user_defined_grads=[self.input_data_fp32],
                                   user_defined_grad_outputs=[
                                       self.inputs["X"].reshape(
                                           self.infered_shape)
                                   ])


if __name__ == '__main__':
    enable_static()
    unittest.main()
