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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 unittest.mock import patch
from opentelemetry import context
from opentelemetry.context.context import Context
from opentelemetry.context.contextvars_context import ContextVarsRuntimeContext
from opentelemetry.environment_variables import OTEL_PYTHON_CONTEXT
def _do_work() -> str:
key = context.create_key("say")
context.attach(context.set_value(key, "bar"))
return key
class TestContext(unittest.TestCase):
def setUp(self):
context.attach(Context())
def test_context_key(self):
key1 = context.create_key("say")
key2 = context.create_key("say")
self.assertNotEqual(key1, key2)
first = context.set_value(key1, "foo")
second = context.set_value(key2, "bar")
self.assertEqual(context.get_value(key1, context=first), "foo")
self.assertEqual(context.get_value(key2, context=second), "bar")
def test_context(self):
key1 = context.create_key("say")
self.assertIsNone(context.get_value(key1))
empty = context.get_current()
second = context.set_value(key1, "foo")
self.assertEqual(context.get_value(key1, context=second), "foo")
key2 = _do_work()
self.assertEqual(context.get_value(key2), "bar")
third = context.get_current()
self.assertIsNone(context.get_value(key1, context=empty))
self.assertEqual(context.get_value(key1, context=second), "foo")
self.assertEqual(context.get_value(key2, 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_context_is_immutable(self):
with self.assertRaises(ValueError):
# ensure a context
context.get_current()["test"] = "cant-change-immutable"
def test_set_current(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"))
class TestInitContext(unittest.TestCase):
def test_load_runtime_context_default(self):
ctx = context._load_runtime_context() # pylint: disable=W0212
self.assertIsInstance(ctx, ContextVarsRuntimeContext)
@patch.dict("os.environ", {OTEL_PYTHON_CONTEXT: "contextvars_context"})
def test_load_runtime_context(self): # type: ignore[misc]
ctx = context._load_runtime_context() # pylint: disable=W0212
self.assertIsInstance(ctx, ContextVarsRuntimeContext)
@patch.dict("os.environ", {OTEL_PYTHON_CONTEXT: "foo"})
def test_load_runtime_context_fallback(self): # type: ignore[misc]
ctx = context._load_runtime_context() # pylint: disable=W0212
self.assertIsInstance(ctx, ContextVarsRuntimeContext)
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