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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 asyncio
import unittest
from unittest.mock import patch
from opentelemetry import context
from opentelemetry.context.contextvars_context import ContextVarsRuntimeContext
from opentelemetry.sdk import trace
from opentelemetry.sdk.trace import export
from opentelemetry.sdk.trace.export.in_memory_span_exporter import (
InMemorySpanExporter,
)
_SPAN_NAMES = [
"test_span1",
"test_span2",
"test_span3",
"test_span4",
"test_span5",
]
def stop_loop_when(loop, cond_func, timeout=5.0):
"""Registers a periodic callback that stops the loop when cond_func() == True.
Compatible with both Tornado and asyncio.
"""
if cond_func() or timeout <= 0.0:
loop.stop()
return
timeout -= 0.1
loop.call_later(0.1, stop_loop_when, loop, cond_func, timeout)
class TestAsyncio(unittest.TestCase):
async def task(self, name):
with self.tracer.start_as_current_span(name):
context.set_value("say", "bar")
def submit_another_task(self, name):
self.loop.create_task(self.task(name))
def setUp(self):
self.token = context.attach(context.Context())
self.tracer_provider = trace.TracerProvider()
self.tracer = self.tracer_provider.get_tracer(__name__)
self.memory_exporter = InMemorySpanExporter()
span_processor = export.SimpleSpanProcessor(self.memory_exporter)
self.tracer_provider.add_span_processor(span_processor)
self.loop = asyncio.get_event_loop()
def tearDown(self):
context.detach(self.token)
@patch(
"opentelemetry.context._RUNTIME_CONTEXT", ContextVarsRuntimeContext()
)
def test_with_asyncio(self):
with self.tracer.start_as_current_span("asyncio_test"):
for name in _SPAN_NAMES:
self.submit_another_task(name)
stop_loop_when(
self.loop,
lambda: len(self.memory_exporter.get_finished_spans()) >= 5,
timeout=5.0,
)
self.loop.run_forever()
span_list = self.memory_exporter.get_finished_spans()
span_names_list = [span.name for span in span_list]
expected = [
"test_span1",
"test_span2",
"test_span3",
"test_span4",
"test_span5",
"asyncio_test",
]
self.assertCountEqual(span_names_list, expected)
span_names_list.sort()
expected.sort()
self.assertListEqual(span_names_list, expected)
expected_parent = next(
span for span in span_list if span.name == "asyncio_test"
)
for span in span_list:
if span is expected_parent:
continue
self.assertEqual(span.parent, expected_parent.context)
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