def setUpClass(cls):
cls.serialized_trace_id = b3_format.format_trace_id(
trace.generate_trace_id())
cls.serialized_span_id = b3_format.format_span_id(
trace.generate_span_id())
cls.serialized_parent_id = b3_format.format_span_id(
trace.generate_span_id())
def test_extract_multi_header(self):
"""Test the extraction of B3 headers."""
child, parent, new_carrier = get_child_parent_new_carrier({
FORMAT.TRACE_ID_KEY:
self.serialized_trace_id,
FORMAT.SPAN_ID_KEY:
self.serialized_span_id,
FORMAT.PARENT_SPAN_ID_KEY:
self.serialized_parent_id,
FORMAT.SAMPLED_KEY:
"1",
})
self.assertEqual(
new_carrier[FORMAT.TRACE_ID_KEY],
b3_format.format_trace_id(child.context.trace_id),
)
self.assertEqual(
new_carrier[FORMAT.SPAN_ID_KEY],
b3_format.format_span_id(child.context.span_id),
)
self.assertEqual(
new_carrier[FORMAT.PARENT_SPAN_ID_KEY],
b3_format.format_span_id(parent.context.span_id),
)
self.assertEqual(new_carrier[FORMAT.SAMPLED_KEY], "1")
def test_extract_single_header(self):
"""Test the extraction from a single b3 header."""
child, parent, new_carrier = get_child_parent_new_carrier({
FORMAT.SINGLE_HEADER_KEY:
"{}-{}".format(self.serialized_trace_id, self.serialized_span_id)
})
self.assertEqual(
new_carrier[FORMAT.TRACE_ID_KEY],
b3_format.format_trace_id(child.context.trace_id),
)
self.assertEqual(
new_carrier[FORMAT.SPAN_ID_KEY],
b3_format.format_span_id(child.context.span_id),
)
self.assertEqual(new_carrier[FORMAT.SAMPLED_KEY], "1")
self.assertTrue(parent.context.is_remote)
child, parent, new_carrier = get_child_parent_new_carrier({
FORMAT.SINGLE_HEADER_KEY:
"{}-{}-1-{}".format(
self.serialized_trace_id,
self.serialized_span_id,
self.serialized_parent_id,
)
})
self.assertEqual(
new_carrier[FORMAT.TRACE_ID_KEY],
b3_format.format_trace_id(child.context.trace_id),
)
self.assertEqual(
new_carrier[FORMAT.SPAN_ID_KEY],
b3_format.format_span_id(child.context.span_id),
)
self.assertEqual(
new_carrier[FORMAT.PARENT_SPAN_ID_KEY],
b3_format.format_span_id(parent.context.span_id),
)
self.assertTrue(parent.context.is_remote)
self.assertEqual(new_carrier[FORMAT.SAMPLED_KEY], "1")
def test_full_path(self):
trace_id = trace.generate_trace_id()
# We need to use the Werkzeug test app because
# The headers are injected at the wsgi layer.
# The flask test app will not include these, and
# result in the values not propagated.
client = Client(self.app.wsgi_app, BaseResponse)
# emulate b3 headers
client.get(
"/",
headers={
"x-b3-traceid": b3_format.format_trace_id(trace_id),
"x-b3-spanid":
b3_format.format_span_id(trace.generate_span_id()),
"x-b3-sampled": "1",
},
)
# assert the http request header was propagated through.
prepared_request = self.send.call_args[0][1]
headers = prepared_request.headers
for required_header in {"x-b3-traceid", "x-b3-spanid", "x-b3-sampled"}:
self.assertIn(required_header, headers)
self.assertEqual(headers["x-b3-traceid"],
b3_format.format_trace_id(trace_id))