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# 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 unittest
from logging import ERROR
from opentelemetry import context
def do_work() -> None:
context.attach(context.set_value("say", "bar"))
class ContextTestCases:
class BaseTest(unittest.TestCase):
def setUp(self) -> None:
self.previous_context = context.get_current()
def tearDown(self) -> None:
context.attach(self.previous_context)
def test_context(self):
self.assertIsNone(context.get_value("say"))
empty = context.get_current()
second = context.set_value("say", "foo")
self.assertEqual(context.get_value("say", context=second), "foo")
do_work()
self.assertEqual(context.get_value("say"), "bar")
third = context.get_current()
self.assertIsNone(context.get_value("say", context=empty))
self.assertEqual(context.get_value("say", context=second), "foo")
self.assertEqual(context.get_value("say", context=third), "bar")
def test_set_value(self):
first = context.set_value("a", "yyy")
second = context.set_value("a", "zzz")
third = context.set_value("a", "---", first)
self.assertEqual("yyy", context.get_value("a", context=first))
self.assertEqual("zzz", context.get_value("a", context=second))
self.assertEqual("---", context.get_value("a", context=third))
self.assertEqual(None, context.get_value("a"))
def test_attach(self):
context.attach(context.set_value("a", "yyy"))
token = context.attach(context.set_value("a", "zzz"))
self.assertEqual("zzz", context.get_value("a"))
context.detach(token)
self.assertEqual("yyy", context.get_value("a"))
with self.assertLogs(level=ERROR):
context.detach(token)
def test_detach_out_of_order(self):
t1 = context.attach(context.set_value("c", 1))
self.assertEqual(context.get_current(), {"c": 1})
t2 = context.attach(context.set_value("c", 2))
self.assertEqual(context.get_current(), {"c": 2})
context.detach(t1)
self.assertEqual(context.get_current(), {})
context.detach(t2)
self.assertEqual(context.get_current(), {"c": 1})
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