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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.
# type: ignore
import unittest
from unittest.mock import Mock
from opentelemetry.propagators.composite import CompositePropagator
def get_as_list(dict_object, key):
value = dict_object.get(key)
return [value] if value is not None else []
def mock_inject(name, value="data"):
def wrapped(carrier=None, context=None, setter=None):
carrier[name] = value
setter.set({}, f"inject_field_{name}_0", None)
setter.set({}, f"inject_field_{name}_1", None)
return wrapped
def mock_extract(name, value="context"):
def wrapped(carrier=None, context=None, getter=None):
new_context = context.copy()
new_context[name] = value
return new_context
return wrapped
def mock_fields(name):
return {f"inject_field_{name}_0", f"inject_field_{name}_1"}
class TestCompositePropagator(unittest.TestCase):
@classmethod
def setUpClass(cls):
cls.mock_propagator_0 = Mock(
inject=mock_inject("mock-0"),
extract=mock_extract("mock-0"),
fields=mock_fields("mock-0"),
)
cls.mock_propagator_1 = Mock(
inject=mock_inject("mock-1"),
extract=mock_extract("mock-1"),
fields=mock_fields("mock-1"),
)
cls.mock_propagator_2 = Mock(
inject=mock_inject("mock-0", value="data2"),
extract=mock_extract("mock-0", value="context2"),
fields=mock_fields("mock-0"),
)
def test_no_propagators(self):
propagator = CompositePropagator([])
new_carrier = {}
propagator.inject(new_carrier)
self.assertEqual(new_carrier, {})
context = propagator.extract(
carrier=new_carrier, context={}, getter=get_as_list
)
self.assertEqual(context, {})
def test_single_propagator(self):
propagator = CompositePropagator([self.mock_propagator_0])
new_carrier = {}
propagator.inject(new_carrier)
self.assertEqual(new_carrier, {"mock-0": "data"})
context = propagator.extract(
carrier=new_carrier, context={}, getter=get_as_list
)
self.assertEqual(context, {"mock-0": "context"})
def test_multiple_propagators(self):
propagator = CompositePropagator(
[self.mock_propagator_0, self.mock_propagator_1]
)
new_carrier = {}
propagator.inject(new_carrier)
self.assertEqual(new_carrier, {"mock-0": "data", "mock-1": "data"})
context = propagator.extract(
carrier=new_carrier, context={}, getter=get_as_list
)
self.assertEqual(context, {"mock-0": "context", "mock-1": "context"})
def test_multiple_propagators_same_key(self):
# test that when multiple propagators extract/inject the same
# key, the later propagator values are extracted/injected
propagator = CompositePropagator(
[self.mock_propagator_0, self.mock_propagator_2]
)
new_carrier = {}
propagator.inject(new_carrier)
self.assertEqual(new_carrier, {"mock-0": "data2"})
context = propagator.extract(
carrier=new_carrier, context={}, getter=get_as_list
)
self.assertEqual(context, {"mock-0": "context2"})
def test_fields(self):
propagator = CompositePropagator(
[
self.mock_propagator_0,
self.mock_propagator_1,
self.mock_propagator_2,
]
)
mock_setter = Mock()
propagator.inject({}, setter=mock_setter)
inject_fields = set()
for mock_call in mock_setter.mock_calls:
inject_fields.add(mock_call[1][1])
self.assertEqual(inject_fields, propagator.fields)
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