def test_simple_cache_add(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
cache = Cache(app, config={"CACHE_TYPE": "simple"})
cache.add(u"á_complex_number", 50)
spans = writer.pop()
eq_(len(spans), 1)
span = spans[0]
eq_(span.service, self.SERVICE)
eq_(span.resource, "add")
eq_(span.name, "flask_cache.cmd")
eq_(span.span_type, "cache")
eq_(span.error, 0)
expected_meta = {
"flask_cache.key": u"á_complex_number",
"flask_cache.backend": "simple",
}
eq_(span.meta, expected_meta)
def test_simple_cache_set_many(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
cache = Cache(app, config={"CACHE_TYPE": "simple"})
cache.set_many({
'first_complex_op': 10,
'second_complex_op': 20,
})
spans = writer.pop()
eq_(len(spans), 1)
span = spans[0]
eq_(span.service, self.SERVICE)
eq_(span.resource, "set_many")
eq_(span.name, "flask_cache.cmd")
eq_(span.span_type, "cache")
eq_(span.error, 0)
eq_(span.meta["flask_cache.backend"], "simple")
ok_("first_complex_op" in span.meta["flask_cache.key"])
ok_("second_complex_op" in span.meta["flask_cache.key"])
def test_tracer_wrap_class():
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
class Foo(object):
@staticmethod
@tracer.wrap()
def s():
return 1
@classmethod
@tracer.wrap()
def c(cls):
return 2
@tracer.wrap()
def i(cls):
return 3
f = Foo()
eq_(f.s(), 1)
eq_(f.c(), 2)
eq_(f.i(), 3)
spans = writer.pop()
eq_(len(spans), 3)
names = [s.name for s in spans]
# FIXME[matt] include the class name here.
eq_(sorted(names), sorted(["tests.test_tracer.%s" % n for n in ["s", "c", "i"]]))
def test_cache_add_without_arguments(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
cache = Cache(app, config={"CACHE_TYPE": "simple"})
# make a wrong call
with assert_raises(TypeError) as ex:
cache.add()
# ensure that the error is not caused by our tracer
ok_("add()" in ex.exception.args[0])
ok_("argument" in ex.exception.args[0])
spans = writer.pop()
# an error trace must be sent
eq_(len(spans), 1)
span = spans[0]
eq_(span.service, self.SERVICE)
eq_(span.resource, "add")
eq_(span.name, "flask_cache.cmd")
eq_(span.span_type, "cache")
eq_(span.error, 1)
def test_memcached_cache_tracing_with_a_wrong_connection(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
config = {
"CACHE_TYPE": "memcached",
"CACHE_MEMCACHED_SERVERS": ['localhost:22230'],
}
cache = Cache(app, config=config)
# use a wrong memcached connection
try:
cache.get(u"á_complex_operation")
except Exception:
pass
# ensure that the error is not caused by our tracer
spans = writer.pop()
eq_(len(spans), 1)
span = spans[0]
eq_(span.service, self.SERVICE)
eq_(span.resource, "get")
eq_(span.name, "flask_cache.cmd")
eq_(span.span_type, "cache")
eq_(span.meta[CACHE_BACKEND], "memcached")
eq_(span.meta[net.TARGET_HOST], 'localhost')
eq_(span.meta[net.TARGET_PORT], '22230')
def test_simple_cache_add(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
cache = Cache(app, config={"CACHE_TYPE": "simple"})
cache.add(u"á_complex_number", 50)
spans = writer.pop()
eq_(len(spans), 1)
span = spans[0]
eq_(span.service, self.SERVICE)
eq_(span.resource, "add")
eq_(span.name, "flask_cache.cmd")
eq_(span.span_type, "cache")
eq_(span.error, 0)
expected_meta = {
"flask_cache.key": u"á_complex_number",
"flask_cache.backend": "simple",
}
assert_dict_issuperset(span.meta, expected_meta)
def test_redis_cache_tracing_with_a_wrong_connection(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
config = {
'CACHE_TYPE': 'redis',
'CACHE_REDIS_PORT': 2230,
'CACHE_REDIS_HOST': '127.0.0.1'
}
cache = Cache(app, config=config)
# use a wrong redis connection
with pytest.raises(ConnectionError) as ex:
cache.get(u'á_complex_operation')
# ensure that the error is not caused by our tracer
assert '127.0.0.1:2230. Connection refused.' in ex.value.args[0]
spans = writer.pop()
# an error trace must be sent
assert len(spans) == 1
span = spans[0]
assert span.service == self.SERVICE
assert span.resource == 'get'
assert span.name == 'flask_cache.cmd'
assert span.span_type == 'cache'
assert span.meta[CACHE_BACKEND] == 'redis'
assert span.meta[net.TARGET_HOST] == '127.0.0.1'
assert span.metrics[net.TARGET_PORT] == 2230
assert span.error == 1
def test_tracer_wrap_factory():
# it should use a wrap_factory if defined
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
def wrap_executor(tracer,
fn,
args,
kwargs,
span_name=None,
service=None,
resource=None,
span_type=None):
with tracer.trace('wrap.overwrite') as span:
span.set_tag('args', args)
span.set_tag('kwargs', kwargs)
return fn(*args, **kwargs)
@tracer.wrap()
def wrapped_function(param, kw_param=None):
eq_(42, param)
eq_(42, kw_param)
# set the custom wrap factory after the wrapper has been called
tracer.configure(wrap_executor=wrap_executor)
# call the function expecting that the custom tracing wrapper is used
wrapped_function(42, kw_param=42)
eq_(writer.spans[0].name, 'wrap.overwrite')
eq_(writer.spans[0].get_tag('args'), '(42,)')
eq_(writer.spans[0].get_tag('kwargs'), '{\'kw_param\': 42}')
def test_simple_cache_set(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
cache = Cache(app, config={"CACHE_TYPE": "simple"})
cache.set(u"á_complex_operation", u"with_á_value\nin two lines")
spans = writer.pop()
eq_(len(spans), 1)
span = spans[0]
eq_(span.service, self.SERVICE)
eq_(span.resource, "set")
eq_(span.name, "flask_cache.cmd")
eq_(span.span_type, "cache")
eq_(span.error, 0)
expected_meta = {
"flask_cache.key": u"á_complex_operation",
"flask_cache.backend": "simple",
}
assert_dict_issuperset(span.meta, expected_meta)
def test_redis_cache_tracing_with_a_wrong_connection(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
config = {
"CACHE_TYPE": "redis",
"CACHE_REDIS_PORT": 2230,
"CACHE_REDIS_HOST": "127.0.0.1"
}
cache = Cache(app, config=config)
# use a wrong redis connection
with assert_raises(ConnectionError) as ex:
cache.get(u"á_complex_operation")
print(ex.exception)
# ensure that the error is not caused by our tracer
ok_("127.0.0.1:2230. Connection refused." in ex.exception.args[0])
spans = writer.pop()
# an error trace must be sent
eq_(len(spans), 1)
span = spans[0]
eq_(span.service, self.SERVICE)
eq_(span.resource, "get")
eq_(span.name, "flask_cache.cmd")
eq_(span.span_type, "cache")
eq_(span.meta[CACHE_BACKEND], "redis")
eq_(span.meta[net.TARGET_HOST], '127.0.0.1')
eq_(span.meta[net.TARGET_PORT], '2230')
eq_(span.error, 1)
def test_memcached_cache_tracing_with_a_wrong_connection(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
config = {
"CACHE_TYPE": "memcached",
"CACHE_MEMCACHED_SERVERS": ['localhost:2230'],
}
cache = Cache(app, config=config)
# use a wrong memcached connection
try:
cache.get(u"á_complex_operation")
except Exception:
pass
# ensure that the error is not caused by our tracer
spans = writer.pop()
eq_(len(spans), 1)
span = spans[0]
eq_(span.service, self.SERVICE)
eq_(span.resource, "get")
eq_(span.name, "flask_cache.cmd")
eq_(span.span_type, "cache")
eq_(span.meta[CACHE_BACKEND], "memcached")
eq_(span.meta[net.TARGET_HOST], 'localhost')
eq_(span.meta[net.TARGET_PORT], '2230')
def test_simple_cache_set_many(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
cache = Cache(app, config={"CACHE_TYPE": "simple"})
cache.set_many({
'first_complex_op': 10,
'second_complex_op': 20,
})
spans = writer.pop()
eq_(len(spans), 1)
span = spans[0]
eq_(span.service, self.SERVICE)
eq_(span.resource, "set_many")
eq_(span.name, "flask_cache.cmd")
eq_(span.span_type, "cache")
eq_(span.error, 0)
expected_meta = {
"flask_cache.key": "['first_complex_op', 'second_complex_op']",
"flask_cache.backend": "simple",
}
eq_(span.meta["flask_cache.backend"], "simple")
ok_("first_complex_op" in span.meta["flask_cache.key"])
ok_("second_complex_op" in span.meta["flask_cache.key"])
def test_simple_cache_delete_many(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
cache = Cache(app, config={"CACHE_TYPE": "simple"})
cache.delete_many("complex_operation", "another_complex_op")
spans = writer.pop()
eq_(len(spans), 1)
span = spans[0]
eq_(span.service, self.SERVICE)
eq_(span.resource, "delete_many")
eq_(span.name, "flask_cache.cmd")
eq_(span.span_type, "cache")
eq_(span.error, 0)
expected_meta = {
"flask_cache.key": "['complex_operation', 'another_complex_op']",
"flask_cache.backend": "simple",
}
eq_(span.meta, expected_meta)
def test_long_run(self):
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# Test a big matrix of combinaisons
# Ensure to have total_time >> BUFFER_DURATION to reduce edge effects
for tps in [10, 23, 15, 31]:
for (traces_per_s, total_time) in [(80, 23), (75, 66), (1000, 77)]:
with patch_time() as fake_time:
# We do tons of operations in this test, do not let the time slowly shift
fake_time.set_delta(0)
tracer.sampler = ThroughputSampler(tps)
for _ in range(total_time):
for _ in range(traces_per_s):
s = tracer.trace("whatever")
s.finish()
fake_time.sleep(1)
traces = writer.pop()
# The current sampler implementation can introduce an error of up to
# `tps * BUFFER_DURATION` traces at initialization (since the sampler starts empty)
got = len(traces)
expected = tps * total_time
error_delta = tps * tracer.sampler.BUFFER_DURATION
assert abs(got - expected) <= error_delta, \
"Wrong number of traces sampled, %s instead of %s (error_delta > %s)" % (got, expected, error_delta)
def test_simple_limit(self):
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
with patch_time() as fake_time:
tps = 5
tracer.sampler = ThroughputSampler(tps)
for _ in range(10):
s = tracer.trace("whatever")
s.finish()
traces = writer.pop()
got = len(traces)
expected = 10
assert got == expected, \
"Wrong number of traces sampled, %s instead of %s" % (got, expected)
# Wait enough to reset
fake_time.sleep(tracer.sampler.BUFFER_DURATION + 1)
for _ in range(100):
s = tracer.trace("whatever")
s.finish()
traces = writer.pop()
got = len(traces)
expected = tps * tracer.sampler.BUFFER_DURATION
assert got == expected, \
"Wrong number of traces sampled, %s instead of %s" % (got, expected)
def test_sample_rate_deviation(self):
writer = DummyWriter()
for sample_rate in [0.1, 0.25, 0.5, 1]:
tracer = Tracer()
tracer.writer = writer
sample_rate = 0.5
tracer.sampler = RateSampler(sample_rate)
random.seed(1234)
iterations = int(2e4)
for i in range(iterations):
span = tracer.trace(i)
span.finish()
samples = writer.pop()
# We must have at least 1 sample, check that it has its sample rate properly assigned
assert samples[0].get_metric(SAMPLE_RATE_METRIC_KEY) == 0.5
# Less than 1% deviation when "enough" iterations (arbitrary, just check if it converges)
deviation = abs(len(samples) -
(iterations * sample_rate)) / (iterations *
sample_rate)
assert deviation < 0.01, "Deviation too high %f with sample_rate %f" % (
deviation, sample_rate)
def test_tracer_wrap_factory_nested():
# it should use a wrap_factory if defined even in nested tracing
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
def wrap_executor(tracer, fn, args, kwargs, span_name=None, service=None, resource=None, span_type=None):
with tracer.trace('wrap.overwrite') as span:
span.set_tag('args', args)
span.set_tag('kwargs', kwargs)
return fn(*args, **kwargs)
@tracer.wrap()
def wrapped_function(param, kw_param=None):
eq_(42, param)
eq_(42, kw_param)
# set the custom wrap factory after the wrapper has been called
tracer.configure(wrap_executor=wrap_executor)
# call the function expecting that the custom tracing wrapper is used
with tracer.trace('wrap.parent', service='webserver'):
wrapped_function(42, kw_param=42)
eq_(writer.spans[0].name, 'wrap.parent')
eq_(writer.spans[0].service, 'webserver')
eq_(writer.spans[1].name, 'wrap.overwrite')
eq_(writer.spans[1].service, 'webserver')
eq_(writer.spans[1].get_tag('args'), '(42,)')
eq_(writer.spans[1].get_tag('kwargs'), '{\'kw_param\': 42}')
def test_cache_add_without_arguments(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
cache = Cache(app, config={"CACHE_TYPE": "simple"})
# make a wrong call
with assert_raises(TypeError) as ex:
cache.add()
# ensure that the error is not caused by our tracer
ok_("add()" in ex.exception.args[0])
ok_("argument" in ex.exception.args[0])
spans = writer.pop()
# an error trace must be sent
eq_(len(spans), 1)
span = spans[0]
eq_(span.service, self.SERVICE)
eq_(span.resource, "add")
eq_(span.name, "flask_cache.cmd")
eq_(span.span_type, "cache")
eq_(span.error, 1)
def test_redis_cache_tracing_with_a_wrong_connection(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
config = {
"CACHE_TYPE": "redis",
"CACHE_REDIS_PORT": 22230,
}
cache = Cache(app, config=config)
# use a wrong redis connection
with assert_raises(ConnectionError) as ex:
cache.get(u"á_complex_operation")
# ensure that the error is not caused by our tracer
ok_("localhost:22230. Connection refused." in ex.exception.args[0])
spans = writer.pop()
# an error trace must be sent
eq_(len(spans), 1)
span = spans[0]
eq_(span.service, self.SERVICE)
eq_(span.resource, "get")
eq_(span.name, "flask_cache.cmd")
eq_(span.span_type, "cache")
eq_(span.meta[CACHE_BACKEND], "redis")
eq_(span.meta[net.TARGET_HOST], 'localhost')
eq_(span.meta[net.TARGET_PORT], '22230')
eq_(span.error, 1)
def test_cache_add_without_arguments(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
cache = Cache(app, config={'CACHE_TYPE': 'simple'})
# make a wrong call
with pytest.raises(TypeError) as ex:
cache.add()
# ensure that the error is not caused by our tracer
assert 'add()' in ex.value.args[0]
assert 'argument' in ex.value.args[0]
spans = writer.pop()
# an error trace must be sent
assert len(spans) == 1
span = spans[0]
assert span.service == self.SERVICE
assert span.resource == 'add'
assert span.name == 'flask_cache.cmd'
assert span.span_type == 'cache'
assert span.error == 1
def test_tracer_wrap_class():
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
class Foo(object):
@staticmethod
@tracer.wrap()
def s():
return 1
@classmethod
@tracer.wrap()
def c(cls):
return 2
@tracer.wrap()
def i(cls):
return 3
f = Foo()
eq_(f.s(), 1)
eq_(f.c(), 2)
eq_(f.i(), 3)
spans = writer.pop()
eq_(len(spans), 3)
names = [s.name for s in spans]
# FIXME[matt] include the class name here.
eq_(sorted(names),
sorted(["tests.test_tracer.%s" % n for n in ["s", "c", "i"]]))
def test_memcached_cache_tracing_with_a_wrong_connection(self):
# initialize the dummy writer
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# create the TracedCache instance for a Flask app
Cache = get_traced_cache(tracer, service=self.SERVICE)
app = Flask(__name__)
config = {
'CACHE_TYPE': 'memcached',
'CACHE_MEMCACHED_SERVERS': ['localhost:2230'],
}
cache = Cache(app, config=config)
# use a wrong memcached connection
try:
cache.get(u'á_complex_operation')
except Exception:
pass
# ensure that the error is not caused by our tracer
spans = writer.pop()
assert len(spans) == 1
span = spans[0]
assert span.service == self.SERVICE
assert span.resource == 'get'
assert span.name == 'flask_cache.cmd'
assert span.span_type == 'cache'
assert span.meta[CACHE_BACKEND] == 'memcached'
assert span.meta[net.TARGET_HOST] == 'localhost'
assert span.metrics[net.TARGET_PORT] == 2230
def test_tracer_trace_across_fork():
"""
When a trace is started in a parent process and a child process is spawned
The trace should be continued in the child process
"""
tracer = Tracer()
tracer.writer = DummyWriter()
def task(tracer, q):
tracer.writer = DummyWriter()
with tracer.trace("child"):
pass
spans = tracer.writer.pop()
q.put(
[dict(trace_id=s.trace_id, parent_id=s.parent_id) for s in spans])
# Assert tracer in a new process correctly recreates the writer
q = multiprocessing.Queue()
with tracer.trace("parent") as parent:
p = multiprocessing.Process(target=task, args=(tracer, q))
p.start()
p.join()
children = q.get()
assert len(children) == 1
(child, ) = children
assert parent.trace_id == child["trace_id"]
assert child["parent_id"] == parent.span_id
def test_tracer_pid():
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
with tracer.trace("root") as root_span:
with tracer.trace("child") as child_span:
time.sleep(0.05)
eq_(root_span.get_tag(system.PID), str(getpid())) # Root span should contain the pid of the current process
eq_(child_span.get_tag(system.PID), None) # Child span should not contain a pid tag
def test_tracer_pid():
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
with tracer.trace("root") as root_span:
with tracer.trace("child") as child_span:
time.sleep(0.05)
eq_(root_span.get_tag(system.PID), str(getpid())) # Root span should contain the pid of the current process
eq_(child_span.get_tag(system.PID), None) # Child span should not contain a pid tag
def test_tracer_wrap_default_name():
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
@tracer.wrap()
def f():
pass
f()
eq_(writer.spans[0].name, 'tests.test_tracer.f')
def test_manual_keep_then_drop():
tracer = Tracer()
tracer.writer = DummyWriter()
# Test changing the value before finish.
with tracer.trace("asdf") as root:
with tracer.trace("child") as child:
child.set_tag(MANUAL_KEEP_KEY)
root.set_tag(MANUAL_DROP_KEY)
spans = tracer.writer.pop()
assert spans[0].metrics[SAMPLING_PRIORITY_KEY] is priority.USER_REJECT
def test_tracer_wrap_default_name():
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
@tracer.wrap()
def f():
pass
f()
eq_(writer.spans[0].name, 'tests.test_tracer.f')
def test_tracer_wrap_exception():
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
@tracer.wrap()
def f():
raise Exception('bim')
assert_raises(Exception, f)
eq_(len(writer.spans), 1)
eq_(writer.spans[0].error, 1)
def setUp(self):
tracer = Tracer()
tracer.writer = DummyWriter()
self.tracer = tracer
# Backup the old conf
self.backupTracer = settings.TRACER
self.backupEnabled = settings.ENABLED
# Disable tracing
settings.ENABLED = False
settings.TRACER = tracer
# Restart the app
app = apps.get_app_config('datadog_django')
app.ready()
def test_tracer_wrap_exception():
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
@tracer.wrap()
def f():
raise Exception('bim')
assert_raises(Exception, f)
eq_(len(writer.spans), 1)
eq_(writer.spans[0].error, 1)
def test_tracer():
# add some dummy tracing code.
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
sleep = 0.05
def _mix():
with tracer.trace("cake.mix"):
time.sleep(sleep)
def _bake():
with tracer.trace("cake.bake"):
time.sleep(sleep)
def _make_cake():
with tracer.trace("cake.make") as span:
span.service = "baker"
span.resource = "cake"
_mix()
_bake()
# let's run it and make sure all is well.
assert not writer.spans
_make_cake()
spans = writer.pop()
assert spans, "%s" % spans
eq_(len(spans), 3)
spans_by_name = {s.name:s for s in spans}
eq_(len(spans_by_name), 3)
make = spans_by_name["cake.make"]
assert make.span_id
assert make.parent_id is None
assert make.trace_id
for other in ["cake.mix", "cake.bake"]:
s = spans_by_name[other]
eq_(s.parent_id, make.span_id)
eq_(s.trace_id, make.trace_id)
eq_(s.service, make.service) # ensure it inherits the service
eq_(s.resource, s.name) # ensure when we don't set a resource, it's there.
# do it again and make sure it has new trace ids
_make_cake()
spans = writer.pop()
for s in spans:
assert s.trace_id != make.trace_id
def test_tracer():
# add some dummy tracing code.
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
sleep = 0.05
def _mix():
with tracer.trace("cake.mix"):
time.sleep(sleep)
def _bake():
with tracer.trace("cake.bake"):
time.sleep(sleep)
def _make_cake():
with tracer.trace("cake.make") as span:
span.service = "baker"
span.resource = "cake"
_mix()
_bake()
# let's run it and make sure all is well.
assert not writer.spans
_make_cake()
spans = writer.pop()
assert spans, "%s" % spans
eq_(len(spans), 3)
spans_by_name = {s.name: s for s in spans}
eq_(len(spans_by_name), 3)
make = spans_by_name["cake.make"]
assert make.span_id
assert make.parent_id is None
assert make.trace_id
for other in ["cake.mix", "cake.bake"]:
s = spans_by_name[other]
eq_(s.parent_id, make.span_id)
eq_(s.trace_id, make.trace_id)
eq_(s.service, make.service) # ensure it inherits the service
eq_(s.resource,
s.name) # ensure when we don't set a resource, it's there.
# do it again and make sure it has new trace ids
_make_cake()
spans = writer.pop()
for s in spans:
assert s.trace_id != make.trace_id
def test_tracer_disabled_mem_leak():
# ensure that if the tracer is disabled, we still remove things from the
# span buffer upon finishing.
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
tracer.enabled = False
s1 = tracer.trace("foo")
s1.finish()
p1 = tracer.current_span()
s2 = tracer.trace("bar")
assert not s2._parent, s2._parent
s2.finish()
assert not p1, p1
def test_get_report_hostname_default(get_hostname):
get_hostname.return_value = "test-hostname"
tracer = Tracer()
tracer.writer = DummyWriter()
with override_global_config(dict(report_hostname=False)):
with tracer.trace("span"):
with tracer.trace("child"):
pass
spans = tracer.writer.pop()
root = spans[0]
child = spans[1]
assert root.get_tag(HOSTNAME_KEY) is None
assert child.get_tag(HOSTNAME_KEY) is None
def test_tracer_wrap_multiple_calls():
# Make sure that we create a new span each time the function is called
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
@tracer.wrap()
def f():
pass
f()
f()
spans = writer.pop()
eq_(len(spans), 2)
assert spans[0].span_id != spans[1].span_id
def test_unserializable_span_with_finish():
try:
import numpy as np
except ImportError:
raise SkipTest("numpy not installed")
# a weird case where manually calling finish with an unserializable
# span was causing an loop of serialization.
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
with tracer.trace("parent") as span:
span.metrics['as'] = np.int64(1) # circumvent the data checks
span.finish()
def test_tracer_disabled():
# add some dummy tracing code.
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
tracer.enabled = True
with tracer.trace("foo") as s:
s.set_tag("a", "b")
assert writer.pop()
tracer.enabled = False
with tracer.trace("foo") as s:
s.set_tag("a", "b")
assert not writer.pop()
def test_tracer_wrap_multiple_calls():
# Make sure that we create a new span each time the function is called
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
@tracer.wrap()
def f():
pass
f()
f()
spans = writer.pop()
eq_(len(spans), 2)
assert spans[0].span_id != spans[1].span_id
def test_tracer_disabled():
# add some dummy tracing code.
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
tracer.enabled = True
with tracer.trace("foo") as s:
s.set_tag("a", "b")
assert writer.pop()
tracer.enabled = False
with tracer.trace("foo") as s:
s.set_tag("a", "b")
assert not writer.pop()
def test_tracer_disabled_mem_leak():
# ensure that if the tracer is disabled, we still remove things from the
# span buffer upon finishing.
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
tracer.enabled = False
s1 = tracer.trace("foo")
s1.finish()
p1 = tracer.current_span()
s2 = tracer.trace("bar")
assert not s2._parent, s2._parent
s2.finish()
assert not p1, p1
def test_unserializable_span_with_finish():
try:
import numpy as np
except ImportError:
raise SkipTest("numpy not installed")
# a weird case where manually calling finish with an unserializable
# span was causing an loop of serialization.
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
with tracer.trace("parent") as span:
span.metrics['as'] = np.int64(1) # circumvent the data checks
span.finish()
def test_manual_drop():
tracer = Tracer()
tracer.writer = DummyWriter()
# On a root span
with tracer.trace("asdf") as s:
s.set_tag(MANUAL_DROP_KEY)
spans = tracer.writer.pop()
assert spans[0].metrics[SAMPLING_PRIORITY_KEY] is priority.USER_REJECT
# On a child span
with tracer.trace("asdf"):
with tracer.trace("child") as s:
s.set_tag(MANUAL_DROP_KEY)
spans = tracer.writer.pop()
assert spans[0].metrics[SAMPLING_PRIORITY_KEY] is priority.USER_REJECT
def test_tracer_vars():
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# explicit vars
s = tracer.trace("a", service="s", resource="r", span_type="t")
eq_(s.service, "s")
eq_(s.resource, "r")
eq_(s.span_type, "t")
s.finish()
# defaults
s = tracer.trace("a")
eq_(s.service, None)
eq_(s.resource, "a") # inherits
eq_(s.span_type, None)
def test_tracer_vars():
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
# explicit vars
s = tracer.trace("a", service="s", resource="r", span_type="t")
eq_(s.service, "s")
eq_(s.resource, "r")
eq_(s.span_type, "t")
s.finish()
# defaults
s = tracer.trace("a")
eq_(s.service, None)
eq_(s.resource, "a") # inherits
eq_(s.span_type, None)
def test_tracer_global_tags():
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
s1 = tracer.trace('brie')
s1.finish()
assert not s1.meta
tracer.set_tags({'env': 'prod'})
s2 = tracer.trace('camembert')
s2.finish()
assert s2.meta == {'env': 'prod'}
tracer.set_tags({'env': 'staging', 'other': 'tag'})
s3 = tracer.trace('gruyere')
s3.finish()
assert s3.meta == {'env': 'staging', 'other': 'tag'}
def test_tracer_global_tags():
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
s1 = tracer.trace('brie')
s1.finish()
assert not s1.get_tag('env')
assert not s1.get_tag('other')
tracer.set_tags({'env': 'prod'})
s2 = tracer.trace('camembert')
s2.finish()
assert s2.get_tag('env') == 'prod'
assert not s2.get_tag('other')
tracer.set_tags({'env': 'staging', 'other': 'tag'})
s3 = tracer.trace('gruyere')
s3.finish()
assert s3.get_tag('env') == 'staging'
assert s3.get_tag('other') == 'tag'
def test_tracer_wrap():
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
@tracer.wrap('decorated_function', service='s', resource='r',
span_type='t')
def f(tag_name, tag_value):
# make sure we can still set tags
span = tracer.current_span()
span.set_tag(tag_name, tag_value)
f('a', 'b')
spans = writer.pop()
eq_(len(spans), 1)
s = spans[0]
eq_(s.name, 'decorated_function')
eq_(s.service, 's')
eq_(s.resource, 'r')
eq_(s.span_type, 't')
eq_(s.to_dict()['meta']['a'], 'b')
def test_tracer_wrap_span_nesting():
# Make sure that nested spans have the correct parents
writer = DummyWriter()
tracer = Tracer()
tracer.writer = writer
@tracer.wrap('inner')
def inner():
pass
@tracer.wrap('outer')
def outer():
with tracer.trace('mid'):
inner()
outer()
spans = writer.pop()
eq_(len(spans), 3)
# sift through the list so we're not dependent on span ordering within the
# writer
for span in spans:
if span.name == 'outer':
outer_span = span
elif span.name == 'mid':
mid_span = span
elif span.name == 'inner':
inner_span = span
else:
assert False, 'unknown span found' # should never get here
assert outer_span
assert mid_span
assert inner_span
eq_(outer_span.parent_id, None)
eq_(mid_span.parent_id, outer_span.span_id)
eq_(inner_span.parent_id, mid_span.span_id)
def get_dummy_tracer():
tracer = Tracer()
tracer.writer = DummyWriter()
return tracer