def test_error_handling(self):
class TestException(Exception):
pass
def error_parser(propagation_context):
raise TestException()
# implicitly tests finish_span
m_client = Mock()
# these values are used before sending
m_client.new_event.return_value.start_time = datetime.datetime.now()
m_client.new_event.return_value.sample_rate = 99
tracer = SynchronousTracer(m_client)
tracer.register_hooks(http_trace_parser=error_parser)
header_value = '1;trace_id=bloop,parent_id=scoop,context=e30K'
req = DictRequest({
# case shouldn't matter
'X-HoNEyComb-TrACE': header_value,
})
span = tracer.propagate_and_start_trace(
context={'big': 'important_stuff'}, request=req)
# Verify that our new span is at the top of the stack
self.assertEqual(tracer._trace.stack[0], span)
# Verify that we got the event in the mock.
self.assertEqual(span.event.sample_rate, 99)
def test_propagate_and_start_trace_uses_honeycomb_header_when_w3c_also_present(
self):
# implicitly tests finish_span
m_client = Mock()
# these values are used before sending
m_client.new_event.return_value.start_time = datetime.datetime.now()
m_client.new_event.return_value.sample_rate = 1
tracer = SynchronousTracer(m_client)
w3c_value = '00-0af7651916cd43dd8448eb211c80319c-b7ad6b7169203331-00'
honeycomb_value = '1;dataset=flibble,trace_id=bloop,parent_id=scoop,context=e30K'
req = DictRequest({
'traceparent': w3c_value,
'x-honeycomb-trace': honeycomb_value
})
span = tracer.propagate_and_start_trace(
context={'big': 'important_stuff'}, request=req)
self.assertEqual(tracer._trace.stack[0], span)
self.assertEqual(span.trace_id, "bloop")
self.assertEqual(span.parent_id, "scoop")
tracer.finish_trace(span)
self.assertEqual(span.event.dataset, 'flibble')
# ensure the event is sent
span.event.send_presampled.assert_called_once_with()
# ensure that there is no current trace
self.assertIsNone(tracer._trace)
def test_propagate_and_start_trace(self):
# FIXME: Test basics, including error handling and custom hooks
# implicitly tests finish_span
m_client = Mock()
# these values are used before sending
m_client.new_event.return_value.start_time = datetime.datetime.now()
m_client.new_event.return_value.sample_rate = 1
tracer = SynchronousTracer(m_client)
header_value = '1;dataset=flibble,trace_id=bloop,parent_id=scoop,context=e30K'
req = DictRequest({
# case shouldn't matter
'X-HoNEyComb-TrACE': header_value,
})
span = tracer.propagate_and_start_trace(
context={'big': 'important_stuff'}, request=req)
self.assertEqual(tracer._trace.stack[0], span)
self.assertEqual(span.trace_id, "bloop")
self.assertEqual(span.parent_id, "scoop")
tracer.finish_trace(span)
self.assertEqual(span.event.dataset, 'flibble')
# ensure the event is sent
span.event.send_presampled.assert_called_once_with()
# ensure that there is no current trace
self.assertIsNone(tracer._trace)
def test_propagate_and_start_trace_uses_w3c_header_as_fallback(self):
# implicitly tests finish_span
m_client = Mock()
# these values are used before sending
m_client.new_event.return_value.start_time = datetime.datetime.now()
m_client.new_event.return_value.sample_rate = 1
tracer = SynchronousTracer(m_client)
header_value = '00-0af7651916cd43dd8448eb211c80319c-b7ad6b7169203331-00'
req = DictRequest({
'traceparent': header_value,
})
span = tracer.propagate_and_start_trace(
context={'big': 'important_stuff'}, request=req)
self.assertEqual(tracer._trace.stack[0], span)
self.assertEqual(span.trace_id, "0af7651916cd43dd8448eb211c80319c")
self.assertEqual(span.parent_id, "b7ad6b7169203331")
tracer.finish_trace(span)
# ensure the event is sent
span.event.send_presampled.assert_called_once_with()
# ensure that there is no current trace
self.assertIsNone(tracer._trace)