# Copyright The OpenTelemetry Authors
#
# 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 random
from os import environ

import pytest

from opentelemetry.environment_variables import OTEL_PYTHON_CONTEXT


def pytest_sessionstart(session):
    # pylint: disable=unused-argument
    environ[OTEL_PYTHON_CONTEXT] = "contextvars_context"


def pytest_sessionfinish(session):
    # pylint: disable=unused-argument
    environ.pop(OTEL_PYTHON_CONTEXT)


@pytest.fixture(autouse=True)
def random_seed():
    # We use random numbers a lot in sampling tests, make sure they are always the same.
    random.seed(0)