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During the migration the automated script to update the copyright headers accidentally got rid of some of the existing copyright lines. Reinstate them.
308 lines
11 KiB
Python
308 lines
11 KiB
Python
#
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# This file is licensed under the Affero General Public License (AGPL) version 3.
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#
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# Copyright 2022 The Matrix.org Foundation C.I.C.
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# Copyright (C) 2023 New Vector, Ltd
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# See the GNU Affero General Public License for more details:
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# <https://www.gnu.org/licenses/agpl-3.0.html>.
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#
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# Originally licensed under the Apache License, Version 2.0:
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# <http://www.apache.org/licenses/LICENSE-2.0>.
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#
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# [This file includes modifications made by New Vector Limited]
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#
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#
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from typing import Awaitable, cast
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from twisted.internet import defer
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from twisted.test.proto_helpers import MemoryReactorClock
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from synapse.logging.context import (
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LoggingContext,
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make_deferred_yieldable,
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run_in_background,
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)
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from synapse.logging.opentracing import (
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start_active_span,
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start_active_span_follows_from,
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tag_args,
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trace_with_opname,
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)
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from synapse.util import Clock
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try:
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from synapse.logging.scopecontextmanager import LogContextScopeManager
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except ImportError:
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LogContextScopeManager = None # type: ignore
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try:
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import jaeger_client
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except ImportError:
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jaeger_client = None # type: ignore
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import logging
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from tests.unittest import TestCase
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logger = logging.getLogger(__name__)
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class LogContextScopeManagerTestCase(TestCase):
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"""
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Test logging contexts and active opentracing spans.
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There's casts throughout this from generic opentracing objects (e.g.
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opentracing.Span) to the ones specific to Jaeger since they have additional
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properties that these tests depend on. This is safe since the only supported
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opentracing backend is Jaeger.
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"""
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if LogContextScopeManager is None:
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skip = "Requires opentracing" # type: ignore[unreachable]
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if jaeger_client is None:
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skip = "Requires jaeger_client" # type: ignore[unreachable]
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def setUp(self) -> None:
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# since this is a unit test, we don't really want to mess around with the
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# global variables that power opentracing. We create our own tracer instance
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# and test with it.
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scope_manager = LogContextScopeManager()
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config = jaeger_client.config.Config(
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config={}, service_name="test", scope_manager=scope_manager
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)
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self._reporter = jaeger_client.reporter.InMemoryReporter()
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self._tracer = config.create_tracer(
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sampler=jaeger_client.ConstSampler(True),
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reporter=self._reporter,
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)
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def test_start_active_span(self) -> None:
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# the scope manager assumes a logging context of some sort.
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with LoggingContext("root context"):
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self.assertIsNone(self._tracer.active_span)
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# start_active_span should start and activate a span.
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scope = start_active_span("span", tracer=self._tracer)
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span = cast(jaeger_client.Span, scope.span)
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self.assertEqual(self._tracer.active_span, span)
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self.assertIsNotNone(span.start_time)
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# entering the context doesn't actually do a whole lot.
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with scope as ctx:
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self.assertIs(ctx, scope)
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self.assertEqual(self._tracer.active_span, span)
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# ... but leaving it unsets the active span, and finishes the span.
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self.assertIsNone(self._tracer.active_span)
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self.assertIsNotNone(span.end_time)
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# the span should have been reported
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self.assertEqual(self._reporter.get_spans(), [span])
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def test_nested_spans(self) -> None:
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"""Starting two spans off inside each other should work"""
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with LoggingContext("root context"):
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with start_active_span("root span", tracer=self._tracer) as root_scope:
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self.assertEqual(self._tracer.active_span, root_scope.span)
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root_context = cast(jaeger_client.SpanContext, root_scope.span.context)
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scope1 = start_active_span(
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"child1",
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tracer=self._tracer,
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)
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self.assertEqual(
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self._tracer.active_span, scope1.span, "child1 was not activated"
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)
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context1 = cast(jaeger_client.SpanContext, scope1.span.context)
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self.assertEqual(context1.parent_id, root_context.span_id)
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scope2 = start_active_span_follows_from(
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"child2",
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contexts=(scope1,),
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tracer=self._tracer,
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)
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self.assertEqual(self._tracer.active_span, scope2.span)
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context2 = cast(jaeger_client.SpanContext, scope2.span.context)
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self.assertEqual(context2.parent_id, context1.span_id)
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with scope1, scope2:
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pass
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# the root scope should be restored
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self.assertEqual(self._tracer.active_span, root_scope.span)
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span2 = cast(jaeger_client.Span, scope2.span)
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span1 = cast(jaeger_client.Span, scope1.span)
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self.assertIsNotNone(span2.end_time)
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self.assertIsNotNone(span1.end_time)
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self.assertIsNone(self._tracer.active_span)
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# the spans should be reported in order of their finishing.
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self.assertEqual(
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self._reporter.get_spans(), [scope2.span, scope1.span, root_scope.span]
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)
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def test_overlapping_spans(self) -> None:
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"""Overlapping spans which are not neatly nested should work"""
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reactor = MemoryReactorClock()
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clock = Clock(reactor)
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scopes = []
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async def task(i: int) -> None:
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scope = start_active_span(
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f"task{i}",
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tracer=self._tracer,
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)
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scopes.append(scope)
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self.assertEqual(self._tracer.active_span, scope.span)
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await clock.sleep(4)
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self.assertEqual(self._tracer.active_span, scope.span)
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scope.close()
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async def root() -> None:
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with start_active_span("root span", tracer=self._tracer) as root_scope:
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self.assertEqual(self._tracer.active_span, root_scope.span)
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scopes.append(root_scope)
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d1 = run_in_background(task, 1)
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await clock.sleep(2)
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d2 = run_in_background(task, 2)
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# because we did run_in_background, the active span should still be the
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# root.
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self.assertEqual(self._tracer.active_span, root_scope.span)
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await make_deferred_yieldable(
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defer.gatherResults([d1, d2], consumeErrors=True)
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)
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self.assertEqual(self._tracer.active_span, root_scope.span)
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with LoggingContext("root context"):
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# start the test off
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d1 = defer.ensureDeferred(root())
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# let the tasks complete
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reactor.pump((2,) * 8)
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self.successResultOf(d1)
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self.assertIsNone(self._tracer.active_span)
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# the spans should be reported in order of their finishing: task 1, task 2,
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# root.
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self.assertEqual(
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self._reporter.get_spans(),
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[scopes[1].span, scopes[2].span, scopes[0].span],
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)
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def test_trace_decorator_sync(self) -> None:
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"""
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Test whether we can use `@trace_with_opname` (`@trace`) and `@tag_args`
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with sync functions
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"""
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with LoggingContext("root context"):
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@trace_with_opname("fixture_sync_func", tracer=self._tracer)
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@tag_args
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def fixture_sync_func() -> str:
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return "foo"
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result = fixture_sync_func()
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self.assertEqual(result, "foo")
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# the span should have been reported
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self.assertEqual(
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[span.operation_name for span in self._reporter.get_spans()],
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["fixture_sync_func"],
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)
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def test_trace_decorator_deferred(self) -> None:
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"""
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Test whether we can use `@trace_with_opname` (`@trace`) and `@tag_args`
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with functions that return deferreds
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"""
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with LoggingContext("root context"):
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@trace_with_opname("fixture_deferred_func", tracer=self._tracer)
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@tag_args
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def fixture_deferred_func() -> "defer.Deferred[str]":
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d1: defer.Deferred[str] = defer.Deferred()
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d1.callback("foo")
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return d1
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result_d1 = fixture_deferred_func()
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self.assertEqual(self.successResultOf(result_d1), "foo")
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# the span should have been reported
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self.assertEqual(
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[span.operation_name for span in self._reporter.get_spans()],
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["fixture_deferred_func"],
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)
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def test_trace_decorator_async(self) -> None:
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"""
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Test whether we can use `@trace_with_opname` (`@trace`) and `@tag_args`
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with async functions
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"""
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with LoggingContext("root context"):
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@trace_with_opname("fixture_async_func", tracer=self._tracer)
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@tag_args
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async def fixture_async_func() -> str:
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return "foo"
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d1 = defer.ensureDeferred(fixture_async_func())
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self.assertEqual(self.successResultOf(d1), "foo")
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# the span should have been reported
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self.assertEqual(
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[span.operation_name for span in self._reporter.get_spans()],
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["fixture_async_func"],
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)
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def test_trace_decorator_awaitable_return(self) -> None:
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"""
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Test whether we can use `@trace_with_opname` (`@trace`) and `@tag_args`
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with functions that return an awaitable (e.g. a coroutine)
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"""
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with LoggingContext("root context"):
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# Something we can return without `await` to get a coroutine
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async def fixture_async_func() -> str:
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return "foo"
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# The actual kind of function we want to test that returns an awaitable
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@trace_with_opname("fixture_awaitable_return_func", tracer=self._tracer)
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@tag_args
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def fixture_awaitable_return_func() -> Awaitable[str]:
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return fixture_async_func()
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# Something we can run with `defer.ensureDeferred(runner())` and pump the
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# whole async tasks through to completion.
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async def runner() -> str:
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return await fixture_awaitable_return_func()
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d1 = defer.ensureDeferred(runner())
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self.assertEqual(self.successResultOf(d1), "foo")
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# the span should have been reported
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self.assertEqual(
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[span.operation_name for span in self._reporter.get_spans()],
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["fixture_awaitable_return_func"],
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)
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