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test_tracing.py
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238 lines (207 loc) · 7.88 KB
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import unittest
try:
from unittest.mock import MagicMock, patch
except ImportError:
from mock import MagicMock, patch
from ddtrace.helpers import get_correlation_ids
from datadog_lambda.constants import SamplingPriority, TraceHeader, XraySubsegment
from datadog_lambda.tracing import (
extract_dd_trace_context,
create_function_execution_span,
get_dd_trace_context,
set_correlation_ids,
_convert_xray_trace_id,
_convert_xray_entity_id,
_convert_xray_sampling,
)
function_arn = "arn:aws:lambda:us-west-1:123457598159:function:python-layer-test"
def get_mock_context(
aws_request_id="request-id-1",
memory_limit_in_mb="256",
invoked_function_arn=function_arn,
function_version="1",
):
lambda_context = MagicMock()
lambda_context.aws_request_id = aws_request_id
lambda_context.memory_limit_in_mb = memory_limit_in_mb
lambda_context.invoked_function_arn = invoked_function_arn
lambda_context.function_version = function_version
return lambda_context
class TestExtractAndGetDDTraceContext(unittest.TestCase):
def setUp(self):
global dd_tracing_enabled
dd_tracing_enabled = False
patcher = patch("datadog_lambda.tracing.xray_recorder")
self.mock_xray_recorder = patcher.start()
self.mock_xray_recorder.get_trace_entity.return_value = MagicMock(
id="ffff", trace_id="1111", sampled=True
)
self.mock_current_subsegment = MagicMock()
self.mock_xray_recorder.current_subsegment.return_value = (
self.mock_current_subsegment
)
self.addCleanup(patcher.stop)
patcher = patch("datadog_lambda.tracing.is_lambda_context")
self.mock_is_lambda_context = patcher.start()
self.mock_is_lambda_context.return_value = True
self.addCleanup(patcher.stop)
def tearDown(self):
global dd_tracing_enabled
dd_tracing_enabled = False
def test_without_datadog_trace_headers(self):
ctx = extract_dd_trace_context({})
self.assertDictEqual(
ctx,
{
"trace-id": "4369",
"parent-id": "65535",
"sampling-priority": "2",
"source": "xray",
},
)
self.assertDictEqual(
get_dd_trace_context(),
{
TraceHeader.TRACE_ID: "4369",
TraceHeader.PARENT_ID: "65535",
TraceHeader.SAMPLING_PRIORITY: "2",
},
)
def test_with_incomplete_datadog_trace_headers(self):
ctx = extract_dd_trace_context(
{"headers": {TraceHeader.TRACE_ID: "123", TraceHeader.PARENT_ID: "321"}}
)
self.assertDictEqual(
ctx,
{
"trace-id": "4369",
"parent-id": "65535",
"sampling-priority": "2",
"source": "xray",
},
)
self.assertDictEqual(
get_dd_trace_context(),
{
TraceHeader.TRACE_ID: "4369",
TraceHeader.PARENT_ID: "65535",
TraceHeader.SAMPLING_PRIORITY: "2",
},
)
def test_with_complete_datadog_trace_headers(self):
ctx = extract_dd_trace_context(
{
"headers": {
TraceHeader.TRACE_ID: "123",
TraceHeader.PARENT_ID: "321",
TraceHeader.SAMPLING_PRIORITY: "1",
}
}
)
self.assertDictEqual(
ctx,
{
"trace-id": "123",
"parent-id": "321",
"sampling-priority": "1",
"source": "event",
},
)
self.assertDictEqual(
get_dd_trace_context(),
{
TraceHeader.TRACE_ID: "123",
TraceHeader.PARENT_ID: "65535",
TraceHeader.SAMPLING_PRIORITY: "1",
},
)
self.mock_xray_recorder.begin_subsegment.assert_called()
self.mock_xray_recorder.end_subsegment.assert_called()
self.mock_current_subsegment.put_metadata.assert_called_with(
XraySubsegment.KEY,
{"trace-id": "123", "parent-id": "321", "sampling-priority": "1"},
XraySubsegment.NAMESPACE,
)
def test_with_complete_datadog_trace_headers_with_mixed_casing(self):
extract_dd_trace_context(
{
"headers": {
"X-Datadog-Trace-Id": "123",
"X-Datadog-Parent-Id": "321",
"X-Datadog-Sampling-Priority": "1",
}
}
)
self.assertDictEqual(
get_dd_trace_context(),
{
TraceHeader.TRACE_ID: "123",
TraceHeader.PARENT_ID: "65535",
TraceHeader.SAMPLING_PRIORITY: "1",
},
)
class TestXRayContextConversion(unittest.TestCase):
def test_convert_xray_trace_id(self):
self.assertEqual(
_convert_xray_trace_id("00000000e1be46a994272793"), "7043144561403045779"
)
self.assertEqual(
_convert_xray_trace_id("bd862e3fe1be46a994272793"), "7043144561403045779"
)
self.assertEqual(
_convert_xray_trace_id("ffffffffffffffffffffffff"),
"9223372036854775807", # 0x7FFFFFFFFFFFFFFF
)
def test_convert_xray_entity_id(self):
self.assertEqual(
_convert_xray_entity_id("53995c3f42cd8ad8"), "6023947403358210776"
)
self.assertEqual(
_convert_xray_entity_id("1000000000000000"), "1152921504606846976"
)
self.assertEqual(
_convert_xray_entity_id("ffffffffffffffff"), "18446744073709551615"
)
def test_convert_xray_sampling(self):
self.assertEqual(_convert_xray_sampling(True), str(SamplingPriority.USER_KEEP))
self.assertEqual(
_convert_xray_sampling(False), str(SamplingPriority.USER_REJECT)
)
class TestLogsInjection(unittest.TestCase):
def setUp(self):
patcher = patch("datadog_lambda.tracing.get_dd_trace_context")
self.mock_get_dd_trace_context = patcher.start()
self.mock_get_dd_trace_context.return_value = {
TraceHeader.TRACE_ID: "123",
TraceHeader.PARENT_ID: "456",
}
self.addCleanup(patcher.stop)
patcher = patch("datadog_lambda.tracing.is_lambda_context")
self.mock_is_lambda_context = patcher.start()
self.mock_is_lambda_context.return_value = True
self.addCleanup(patcher.stop)
def test_set_correlation_ids(self):
set_correlation_ids()
trace_id, span_id = get_correlation_ids()
self.assertEqual(trace_id, "123")
self.assertEqual(span_id, "456")
class TestFunctionSpanTags(unittest.TestCase):
def test_function(self):
ctx = get_mock_context()
span = create_function_execution_span(ctx, "", False, {"source": ""}, False)
self.assertEqual(span.get_tag("function_arn"), function_arn)
self.assertEqual(span.get_tag("function_version"), "$LATEST")
def test_function_with_version(self):
function_version = "1"
ctx = get_mock_context(
invoked_function_arn=function_arn + ":" + function_version
)
span = create_function_execution_span(ctx, "", False, {"source": ""}, False)
self.assertEqual(span.get_tag("function_arn"), function_arn)
self.assertEqual(span.get_tag("function_version"), function_version)
def test_function_with_alias(self):
function_alias = "alias"
ctx = get_mock_context(invoked_function_arn=function_arn + ":" + function_alias)
span = create_function_execution_span(ctx, "", False, {"source": ""}, False)
self.assertEqual(span.get_tag("function_arn"), function_arn)
self.assertEqual(span.get_tag("function_version"), function_alias)