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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.
# pylint: disable=W0212,W0222,W0221
import typing
import unittest
from opentelemetry import trace
from opentelemetry.test.globals_test import TraceGlobalsTest
from opentelemetry.trace.span import (
INVALID_SPAN_CONTEXT,
NonRecordingSpan,
Span,
)
from opentelemetry.util._decorator import _agnosticcontextmanager
from opentelemetry.util.types import Attributes
class TestProvider(trace.NoOpTracerProvider):
def get_tracer(
self,
instrumenting_module_name: str,
instrumenting_library_version: typing.Optional[str] = None,
schema_url: typing.Optional[str] = None,
attributes: typing.Optional[Attributes] = None,
) -> trace.Tracer:
return TestTracer()
class TestTracer(trace.NoOpTracer):
def start_span(self, *args, **kwargs):
return SpanTest(INVALID_SPAN_CONTEXT)
@_agnosticcontextmanager # pylint: disable=protected-access
def start_as_current_span(self, *args, **kwargs): # type: ignore
with trace.use_span(self.start_span(*args, **kwargs)) as span: # type: ignore
yield span
class SpanTest(NonRecordingSpan):
pass
class TestProxy(TraceGlobalsTest, unittest.TestCase):
def test_proxy_tracer(self):
provider = trace.get_tracer_provider()
# proxy provider
self.assertIsInstance(provider, trace.ProxyTracerProvider)
# provider returns proxy tracer
tracer = provider.get_tracer("proxy-test")
self.assertIsInstance(tracer, trace.ProxyTracer)
with tracer.start_span("span1") as span:
self.assertIsInstance(span, trace.NonRecordingSpan)
with tracer.start_as_current_span("span2") as span:
self.assertIsInstance(span, trace.NonRecordingSpan)
# set a real provider
trace.set_tracer_provider(TestProvider())
# get_tracer_provider() now returns the real provider
self.assertIsInstance(trace.get_tracer_provider(), TestProvider)
# tracer provider now returns real instance
self.assertIsInstance(trace.get_tracer_provider(), TestProvider)
# references to the old provider still work but return real tracer now
real_tracer = provider.get_tracer("proxy-test")
self.assertIsInstance(real_tracer, TestTracer)
# reference to old proxy tracer now delegates to a real tracer and
# creates real spans
with tracer.start_span("") as span:
self.assertIsInstance(span, SpanTest)
def test_late_config(self):
# get a tracer and instrument a function as we would at the
# root of a module
tracer = trace.get_tracer("test")
@tracer.start_as_current_span("span")
def my_function() -> Span:
return trace.get_current_span()
# call function before configuring tracing provider, should
# return INVALID_SPAN from the NoOpTracer
self.assertEqual(my_function(), trace.INVALID_SPAN)
# configure tracing provider
trace.set_tracer_provider(TestProvider())
# call function again, we should now be getting a TestSpan
self.assertIsInstance(my_function(), SpanTest)
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