
# Copyright (c) 2019, NVIDIA CORPORATION.
#
# 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 pytest

from dask.distributed import Client, wait
from cuml.dask.common import raise_exception_from_futures


def _raise_exception():
    raise ValueError("intentional exception")


def test_dask_exceptions(cluster):
    c = Client(cluster)
    try:
        fut = c.submit(_raise_exception)
        wait(fut)

        with pytest.raises(RuntimeError):
            raise_exception_from_futures([fut])
    finally:
        c.close()
