90 lines
4.0 KiB
C++
90 lines
4.0 KiB
C++
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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#include <gtest/gtest.h>
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#include <cstdint>
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#include <map>
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#include <string>
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#include <utility>
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#include <vector>
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#include "opentelemetry/common/key_value_iterable_view.h"
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#include "opentelemetry/nostd/shared_ptr.h"
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#include "opentelemetry/nostd/span.h"
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#include "opentelemetry/nostd/string_view.h"
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#include "opentelemetry/sdk/trace/sampler.h"
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#include "opentelemetry/sdk/trace/samplers/always_off.h"
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#include "opentelemetry/sdk/trace/samplers/always_on.h"
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#include "opentelemetry/sdk/trace/samplers/parent.h"
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#include "opentelemetry/trace/span_context.h"
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#include "opentelemetry/trace/span_context_kv_iterable_view.h"
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#include "opentelemetry/trace/span_id.h"
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#include "opentelemetry/trace/span_metadata.h"
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#include "opentelemetry/trace/trace_flags.h"
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#include "opentelemetry/trace/trace_id.h"
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#include "opentelemetry/trace/trace_state.h"
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using opentelemetry::sdk::trace::AlwaysOffSampler;
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using opentelemetry::sdk::trace::AlwaysOnSampler;
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using opentelemetry::sdk::trace::Decision;
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using opentelemetry::sdk::trace::ParentBasedSampler;
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namespace trace_api = opentelemetry::trace;
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TEST(ParentBasedSampler, ShouldSample)
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{
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ParentBasedSampler sampler_off(std::make_shared<AlwaysOffSampler>());
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ParentBasedSampler sampler_on(std::make_shared<AlwaysOnSampler>());
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// Set up parameters
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uint8_t trace_id_buffer[trace_api::TraceId::kSize] = {1};
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trace_api::TraceId trace_id{trace_id_buffer};
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uint8_t span_id_buffer[trace_api::SpanId::kSize] = {1};
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trace_api::SpanId span_id{span_id_buffer};
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trace_api::SpanKind span_kind = trace_api::SpanKind::kInternal;
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using M = std::map<std::string, int>;
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M m1 = {{}};
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using L = std::vector<std::pair<trace_api::SpanContext, std::map<std::string, std::string>>>;
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L l1 = {{trace_api::SpanContext(false, false), {}}, {trace_api::SpanContext(false, false), {}}};
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opentelemetry::common::KeyValueIterableView<M> view{m1};
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trace_api::SpanContextKeyValueIterableView<L> links{l1};
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auto trace_state = trace_api::TraceState::FromHeader("congo=t61rcWkgMzE");
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trace_api::SpanContext parent_context_sampled(trace_id, span_id, trace_api::TraceFlags{1}, false,
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trace_state);
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trace_api::SpanContext parent_context_nonsampled(trace_id, span_id, trace_api::TraceFlags{0},
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false, trace_state);
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// Case 1: Parent doesn't exist. Return result of delegateSampler()
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auto sampling_result = sampler_off.ShouldSample(trace_api::SpanContext::GetInvalid(), trace_id,
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"", span_kind, view, links);
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auto sampling_result2 = sampler_on.ShouldSample(trace_api::SpanContext::GetInvalid(), trace_id,
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"", span_kind, view, links);
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ASSERT_EQ(Decision::DROP, sampling_result.decision);
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ASSERT_EQ(Decision::RECORD_AND_SAMPLE, sampling_result2.decision);
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ASSERT_EQ("", sampling_result.trace_state->ToHeader());
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ASSERT_EQ("", sampling_result2.trace_state->ToHeader());
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// Case 2: Parent exists and SampledFlag is true
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auto sampling_result3 =
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sampler_off.ShouldSample(parent_context_sampled, trace_id, "", span_kind, view, links);
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ASSERT_EQ(Decision::RECORD_AND_SAMPLE, sampling_result3.decision);
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ASSERT_EQ("congo=t61rcWkgMzE", sampling_result3.trace_state->ToHeader());
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// Case 3: Parent exists and SampledFlag is false
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auto sampling_result4 =
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sampler_on.ShouldSample(parent_context_nonsampled, trace_id, "", span_kind, view, links);
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ASSERT_EQ(Decision::DROP, sampling_result4.decision);
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ASSERT_EQ("congo=t61rcWkgMzE", sampling_result4.trace_state->ToHeader());
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}
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TEST(ParentBasedSampler, GetDescription)
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{
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ParentBasedSampler sampler(std::make_shared<AlwaysOffSampler>());
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ASSERT_EQ("ParentBased{AlwaysOffSampler}", sampler.GetDescription());
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ParentBasedSampler sampler2(std::make_shared<AlwaysOnSampler>());
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ASSERT_EQ("ParentBased{AlwaysOnSampler}", sampler2.GetDescription());
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}
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