#   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.

import paddle.fluid as fluid
import paddle.fluid.layers as layers
import op_test
import numpy
import unittest


class TestFetchVar(op_test.OpTest):
    def test_fetch_var(self):
        val = numpy.array([1, 3, 5]).astype(numpy.int32)
        x = layers.create_tensor(dtype="int32", persistable=True, name="x")
        layers.assign(input=val, output=x)
        exe = fluid.Executor(fluid.CPUPlace())
        exe.run(fluid.default_main_program(), feed={}, fetch_list=[])
        fetched_x = fluid.executor._fetch_var("x")
        self.assertTrue(
            numpy.array_equal(fetched_x, val),
            "fetch_x=%s val=%s" % (fetched_x, val))
        self.assertEqual(fetched_x.dtype, val.dtype)


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