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# Copyright The OpenTracing 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.
from __future__ import absolute_import
from unittest import mock
import time
import types
from opentracing import child_of
from opentracing import Format
from opentracing import Tracer
from opentracing import logs
from opentracing import tags
def test_span():
tracer = Tracer()
parent = tracer.start_span('parent')
child = tracer.start_span('test', references=child_of(parent.context))
assert parent == child
child.log_kv({'event': 'cache_hit', 'size.bytes': 42})
child.log_kv({'event': 'cache_miss'}, time.time())
child.log_event('cache_hit', ['arg1', 'arg2'])
with mock.patch.object(parent, 'finish') as finish:
with mock.patch.object(parent, 'log_event') as log_event:
with mock.patch.object(parent, 'log_kv') as log_kv:
with mock.patch.object(parent, 'set_tag') as set_tag:
try:
with parent:
raise ValueError()
except ValueError:
pass
assert finish.call_count == 1
assert log_event.call_count == 0
assert log_kv.call_count == 1
assert set_tag.call_count == 1
with mock.patch.object(parent, 'finish') as finish:
with mock.patch.object(parent, 'log_event') as log_kv:
with parent:
pass
assert finish.call_count == 1
assert log_kv.call_count == 0
parent.set_tag('x', 'y').set_tag('z', 1) # test chaining
parent.set_tag(tags.PEER_SERVICE, 'test-service')
parent.set_tag(tags.PEER_HOST_IPV4, 127 << 24 + 1)
parent.set_tag(tags.PEER_HOST_IPV6, '::')
parent.set_tag(tags.PEER_HOSTNAME, 'uber.com')
parent.set_tag(tags.PEER_PORT, 123)
parent.finish()
def test_span_error_report():
tracer = Tracer()
span = tracer.start_span('foo')
error_message = 'unexpected_situation'
with mock.patch.object(span, 'log_kv') as log_kv:
with mock.patch.object(span, 'set_tag') as set_tag:
try:
with span:
raise ValueError(error_message)
except ValueError:
pass
assert set_tag.call_count == 1
assert set_tag.call_args[0] == (tags.ERROR, True)
assert log_kv.call_count == 1
log_kv_args = log_kv.call_args[0][0]
assert log_kv_args.get(logs.EVENT, None) is tags.ERROR
assert log_kv_args.get(logs.MESSAGE, None) is error_message
assert log_kv_args.get(logs.ERROR_KIND, None) is ValueError
assert isinstance(log_kv_args.get(logs.ERROR_OBJECT, None),
ValueError)
assert isinstance(log_kv_args.get(logs.STACK, None),
types.TracebackType)
def test_inject():
tracer = Tracer()
span = tracer.start_span()
bin_carrier = bytearray()
tracer.inject(
span_context=span.context,
format=Format.BINARY,
carrier=bin_carrier)
assert bin_carrier == bytearray()
text_carrier = {}
tracer.inject(
span_context=span.context,
format=Format.TEXT_MAP,
carrier=text_carrier)
assert text_carrier == {}
def test_extract():
tracer = Tracer()
noop_span = tracer._noop_span
bin_carrier = bytearray()
span_ctx = tracer.extract(Format.BINARY, carrier=bin_carrier)
assert noop_span.context == span_ctx
text_carrier = {}
span_ctx = tracer.extract(Format.TEXT_MAP, carrier=text_carrier)
assert noop_span.context == span_ctx
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