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# ------------------------------------
# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
# ------------------------------------
"""Tests for the distributed tracing policy."""
import logging
from azure.core.pipeline import PipelineResponse, PipelineRequest, PipelineContext
from azure.core.pipeline.policies import DistributedTracingPolicy, UserAgentPolicy
from azure.core.pipeline.transport import HttpRequest, HttpResponse
from azure.core.settings import settings
from tracing_common import FakeSpan
import time
import pytest
try:
from unittest import mock
except ImportError:
import mock
def test_distributed_tracing_policy_solo():
"""Test policy with no other policy and happy path"""
settings.tracing_implementation.set_value(FakeSpan)
with FakeSpan(name="parent") as root_span:
policy = DistributedTracingPolicy()
request = HttpRequest("GET", "http://127.0.0.1/temp?query=query")
request.headers["x-ms-client-request-id"] = "some client request id"
pipeline_request = PipelineRequest(request, PipelineContext(None))
policy.on_request(pipeline_request)
response = HttpResponse(request, None)
response.headers = request.headers
response.status_code = 202
response.headers["x-ms-request-id"] = "some request id"
assert request.headers.get("traceparent") == '123456789'
policy.on_response(pipeline_request, PipelineResponse(request, response, PipelineContext(None)))
time.sleep(0.001)
policy.on_request(pipeline_request)
try:
raise ValueError("Transport trouble")
except:
policy.on_exception(pipeline_request)
# Check on_response
network_span = root_span.children[0]
assert network_span.name == "/temp"
assert network_span.attributes.get("http.method") == "GET"
assert network_span.attributes.get("component") == "http"
assert network_span.attributes.get("http.url") == "http://127.0.0.1/temp?query=query"
assert network_span.attributes.get("http.user_agent") is None
assert network_span.attributes.get("x-ms-request-id") == "some request id"
assert network_span.attributes.get("x-ms-client-request-id") == "some client request id"
assert network_span.attributes.get("http.status_code") == 202
# Check on_exception
network_span = root_span.children[1]
assert network_span.name == "/temp"
assert network_span.attributes.get("http.method") == "GET"
assert network_span.attributes.get("component") == "http"
assert network_span.attributes.get("http.url") == "http://127.0.0.1/temp?query=query"
assert network_span.attributes.get("x-ms-client-request-id") == "some client request id"
assert network_span.attributes.get("http.user_agent") is None
assert network_span.attributes.get("x-ms-request-id") == None
assert network_span.attributes.get("http.status_code") == 504
def test_distributed_tracing_policy_attributes():
"""Test policy with no other policy and happy path"""
settings.tracing_implementation.set_value(FakeSpan)
with FakeSpan(name="parent") as root_span:
policy = DistributedTracingPolicy(tracing_attributes={
'myattr': 'myvalue'
})
request = HttpRequest("GET", "http://127.0.0.1/temp?query=query")
pipeline_request = PipelineRequest(request, PipelineContext(None))
policy.on_request(pipeline_request)
response = HttpResponse(request, None)
response.headers = request.headers
response.status_code = 202
policy.on_response(pipeline_request, PipelineResponse(request, response, PipelineContext(None)))
# Check on_response
network_span = root_span.children[0]
assert network_span.attributes.get("myattr") == "myvalue"
def test_distributed_tracing_policy_badurl(caplog):
"""Test policy with a bad url that will throw, and be sure policy ignores it"""
settings.tracing_implementation.set_value(FakeSpan)
with FakeSpan(name="parent") as root_span:
policy = DistributedTracingPolicy()
request = HttpRequest("GET", "http://[[[")
request.headers["x-ms-client-request-id"] = "some client request id"
pipeline_request = PipelineRequest(request, PipelineContext(None))
with caplog.at_level(logging.WARNING, logger="azure.core.pipeline.policies.distributed_tracing"):
policy.on_request(pipeline_request)
assert "Unable to start network span" in caplog.text
response = HttpResponse(request, None)
response.headers = request.headers
response.status_code = 202
response.headers["x-ms-request-id"] = "some request id"
assert request.headers.get("traceparent") is None # Got not network trace
policy.on_response(pipeline_request, PipelineResponse(request, response, PipelineContext(None)))
time.sleep(0.001)
policy.on_request(pipeline_request)
try:
raise ValueError("Transport trouble")
except:
policy.on_exception(pipeline_request)
assert len(root_span.children) == 0
def test_distributed_tracing_policy_with_user_agent():
"""Test policy working with user agent."""
settings.tracing_implementation.set_value(FakeSpan)
with mock.patch.dict('os.environ', {"AZURE_HTTP_USER_AGENT": "mytools"}):
with FakeSpan(name="parent") as root_span:
policy = DistributedTracingPolicy()
request = HttpRequest("GET", "http://127.0.0.1")
request.headers["x-ms-client-request-id"] = "some client request id"
pipeline_request = PipelineRequest(request, PipelineContext(None))
user_agent = UserAgentPolicy()
user_agent.on_request(pipeline_request)
policy.on_request(pipeline_request)
response = HttpResponse(request, None)
response.headers = request.headers
response.status_code = 202
response.headers["x-ms-request-id"] = "some request id"
pipeline_response = PipelineResponse(request, response, PipelineContext(None))
assert request.headers.get("traceparent") == '123456789'
policy.on_response(pipeline_request, pipeline_response)
time.sleep(0.001)
policy.on_request(pipeline_request)
try:
raise ValueError("Transport trouble")
except:
policy.on_exception(pipeline_request)
user_agent.on_response(pipeline_request, pipeline_response)
network_span = root_span.children[0]
assert network_span.name == "/"
assert network_span.attributes.get("http.method") == "GET"
assert network_span.attributes.get("component") == "http"
assert network_span.attributes.get("http.url") == "http://127.0.0.1"
assert network_span.attributes.get("http.user_agent").endswith("mytools")
assert network_span.attributes.get("x-ms-request-id") == "some request id"
assert network_span.attributes.get("x-ms-client-request-id") == "some client request id"
assert network_span.attributes.get("http.status_code") == 202
network_span = root_span.children[1]
assert network_span.name == "/"
assert network_span.attributes.get("http.method") == "GET"
assert network_span.attributes.get("component") == "http"
assert network_span.attributes.get("http.url") == "http://127.0.0.1"
assert network_span.attributes.get("http.user_agent").endswith("mytools")
assert network_span.attributes.get("x-ms-client-request-id") == "some client request id"
assert network_span.attributes.get("x-ms-request-id") is None
assert network_span.attributes.get("http.status_code") == 504
# Exception should propagate status for Opencensus
assert network_span.status == 'Transport trouble'
def test_span_namer():
settings.tracing_implementation.set_value(FakeSpan)
with FakeSpan(name="parent") as root_span:
request = HttpRequest("GET", "http://127.0.0.1/temp?query=query")
pipeline_request = PipelineRequest(request, PipelineContext(None))
def fixed_namer(http_request):
assert http_request is request
return "overridenname"
policy = DistributedTracingPolicy(network_span_namer=fixed_namer)
policy.on_request(pipeline_request)
response = HttpResponse(request, None)
response.headers = request.headers
response.status_code = 202
policy.on_response(pipeline_request, PipelineResponse(request, response, PipelineContext(None)))
def operation_namer(http_request):
assert http_request is request
return "operation level name"
pipeline_request.context.options['network_span_namer'] = operation_namer
policy.on_request(pipeline_request)
response = HttpResponse(request, None)
response.headers = request.headers
response.status_code = 202
policy.on_response(pipeline_request, PipelineResponse(request, response, PipelineContext(None)))
# Check init kwargs
network_span = root_span.children[0]
assert network_span.name == "overridenname"
# Check operation kwargs
network_span = root_span.children[1]
assert network_span.name == "operation level name"
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