#   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
from dygraph_to_static_utils import (
    Dy2StTestBase,
    enable_to_static_guard,
)

import paddle
from paddle import base


def dyfunc_assert_variable(x):
    x_v = paddle.to_tensor(x)
    assert x_v


def dyfunc_assert_non_variable(x=True):
    assert x


class TestAssertVariable(Dy2StTestBase):
    def _run(self, func, x, with_exception, to_static):
        with enable_to_static_guard(to_static):
            if with_exception:
                with (
                    self.assertRaises(BaseException),  # noqa: B017
                    base.dygraph.guard(),
                ):
                    func(x)
            else:
                with base.dygraph.guard():
                    func(x)

    def _run_dy_static(self, func, x, with_exception):
        self._run(func, x, with_exception, True)
        self._run(func, x, with_exception, False)

    def test_non_variable(self):
        self._run_dy_static(
            paddle.jit.to_static(dyfunc_assert_non_variable),
            x=False,
            with_exception=True,
        )
        self._run_dy_static(
            paddle.jit.to_static(dyfunc_assert_non_variable),
            x=True,
            with_exception=False,
        )

    def test_bool_variable(self):
        self._run_dy_static(
            paddle.jit.to_static(dyfunc_assert_variable),
            x=numpy.array([False]),
            with_exception=True,
        )
        self._run_dy_static(
            paddle.jit.to_static(dyfunc_assert_variable),
            x=numpy.array([True]),
            with_exception=False,
        )

    def test_int_variable(self):
        self._run_dy_static(
            paddle.jit.to_static(dyfunc_assert_variable),
            x=numpy.array([0]),
            with_exception=True,
        )
        self._run_dy_static(
            paddle.jit.to_static(dyfunc_assert_variable),
            x=numpy.array([1]),
            with_exception=False,
        )


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