# 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.

import unittest
import numpy as np
from numpy.random import random as rand
import paddle.complex as cpx
import paddle.fluid as fluid
import paddle.fluid.dygraph as dg


class TestComplexTraceLayer(unittest.TestCase):
    def setUp(self):
        self._dtype = "float64"
        self._places = [fluid.CPUPlace()]
        if fluid.core.is_compiled_with_cuda():
            self._places.append(fluid.CUDAPlace(0))

    def test_complex_x(self):
        input = rand([2, 20, 2, 3]).astype(self._dtype) + 1j * rand(
            [2, 20, 2, 3]).astype(self._dtype)
        for place in self._places:
            with dg.guard(place):
                var_x = dg.to_variable(input)
                result = cpx.trace(var_x, offset=1, dim1=0, dim2=2).numpy()
                target = np.trace(input, offset=1, axis1=0, axis2=2)
                self.assertTrue(np.allclose(result, target))


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