# Copyright 2017 Google LLC
#
# 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 google.api_core.gapic_v1 import client_info


def test_constructor_defaults():
    info = client_info.ClientInfo()

    assert info.python_version is not None
    assert info.grpc_version is not None
    assert info.api_core_version is not None
    assert info.gapic_version is None
    assert info.client_library_version is None


def test_constructor_options():
    info = client_info.ClientInfo(
        python_version='1',
        grpc_version='2',
        api_core_version='3',
        gapic_version='4',
        client_library_version='5')

    assert info.python_version == '1'
    assert info.grpc_version == '2'
    assert info.api_core_version == '3'
    assert info.gapic_version == '4'
    assert info.client_library_version == '5'


def test_to_user_agent_minimal():
    info = client_info.ClientInfo(
        python_version='1',
        api_core_version='2',
        grpc_version=None
    )

    user_agent = info.to_user_agent()

    assert user_agent == 'gl-python/1 gax/2'


def test_to_user_agent_full():
    info = client_info.ClientInfo(
        python_version='1',
        grpc_version='2',
        api_core_version='3',
        gapic_version='4',
        client_library_version='5')

    user_agent = info.to_user_agent()

    assert user_agent == 'gl-python/1 grpc/2 gax/3 gapic/4 gccl/5'


def test_to_grpc_metadata():
    info = client_info.ClientInfo()

    metadata = info.to_grpc_metadata()

    assert metadata == (client_info.METRICS_METADATA_KEY, info.to_user_agent())
