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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#include <gtest/gtest.h>
#include <stdint.h>
#include <map>
#include <string>
#include <utility>
#include <vector>
#include "opentelemetry/context/context.h"
#include "opentelemetry/context/propagation/composite_propagator.h"
#include "opentelemetry/context/propagation/text_map_propagator.h"
#include "opentelemetry/context/runtime_context.h"
#include "opentelemetry/nostd/function_ref.h"
#include "opentelemetry/nostd/shared_ptr.h"
#include "opentelemetry/nostd/span.h"
#include "opentelemetry/nostd/string_view.h"
#include "opentelemetry/nostd/variant.h"
#include "opentelemetry/trace/default_span.h"
#include "opentelemetry/trace/propagation/b3_propagator.h"
#include "opentelemetry/trace/propagation/http_trace_context.h"
#include "opentelemetry/trace/scope.h"
#include "opentelemetry/trace/span.h"
#include "opentelemetry/trace/span_context.h"
#include "opentelemetry/trace/span_id.h"
#include "opentelemetry/trace/span_metadata.h"
#include "opentelemetry/trace/trace_flags.h"
#include "opentelemetry/trace/trace_id.h"
using namespace opentelemetry;
template <typename T>
static std::string Hex(const T &id_item)
{
char buf[T::kSize * 2];
id_item.ToLowerBase16(buf);
return std::string(buf, sizeof(buf));
}
class TextMapCarrierTest : public context::propagation::TextMapCarrier
{
public:
nostd::string_view Get(nostd::string_view key) const noexcept override
{
auto it = headers_.find(std::string(key));
if (it != headers_.end())
{
return nostd::string_view(it->second);
}
return "";
}
void Set(nostd::string_view key, nostd::string_view value) noexcept override
{
headers_[std::string(key)] = std::string(value);
}
std::map<std::string, std::string> headers_;
};
class CompositePropagatorTest : public ::testing::Test
{
public:
CompositePropagatorTest()
{
std::vector<std::unique_ptr<context::propagation::TextMapPropagator>> propogator_list = {};
std::unique_ptr<context::propagation::TextMapPropagator> w3c_propogator(
new trace::propagation::HttpTraceContext());
std::unique_ptr<context::propagation::TextMapPropagator> b3_propogator(
new trace::propagation::B3Propagator());
propogator_list.push_back(std::move(w3c_propogator));
propogator_list.push_back(std::move(b3_propogator));
composite_propagator_ =
std::make_shared<context::propagation::CompositePropagator>(std::move(propogator_list));
}
protected:
std::shared_ptr<context::propagation::CompositePropagator> composite_propagator_;
};
TEST_F(CompositePropagatorTest, Extract)
{
TextMapCarrierTest carrier;
carrier.headers_ = {
{"traceparent", "00-4bf92f3577b34da6a3ce929d0e0e4736-0102030405060708-01"},
{"b3", "80f198ee56343ba864fe8b2a57d3eff7-e457b5a2e4d86bd1-1-05e3ac9a4f6e3b90"}};
context::Context ctx1 = context::Context{};
context::Context ctx2 = composite_propagator_->Extract(carrier, ctx1);
auto ctx2_span = ctx2.GetValue(trace::kSpanKey);
EXPECT_TRUE(nostd::holds_alternative<nostd::shared_ptr<trace::Span>>(ctx2_span));
auto span = nostd::get<nostd::shared_ptr<trace::Span>>(ctx2_span);
// confirm last propagator in composite propagator list (B3 here) wins for same key
// ("active_span" here).
EXPECT_EQ(Hex(span->GetContext().trace_id()), "80f198ee56343ba864fe8b2a57d3eff7");
EXPECT_EQ(Hex(span->GetContext().span_id()), "e457b5a2e4d86bd1");
EXPECT_EQ(span->GetContext().IsSampled(), true);
EXPECT_EQ(span->GetContext().IsRemote(), true);
// Now check that last propagator does not win if there is no header for it
carrier.headers_ = {{"traceparent", "00-4bf92f3577b34da6a3ce929d0e0e4736-0102030405060708-00"}};
ctx1 = context::Context{};
ctx2 = composite_propagator_->Extract(carrier, ctx1);
ctx2_span = ctx2.GetValue(trace::kSpanKey);
EXPECT_TRUE(nostd::holds_alternative<nostd::shared_ptr<trace::Span>>(ctx2_span));
span = nostd::get<nostd::shared_ptr<trace::Span>>(ctx2_span);
// Here the first propagator (W3C) wins
EXPECT_EQ(Hex(span->GetContext().trace_id()), "4bf92f3577b34da6a3ce929d0e0e4736");
EXPECT_EQ(Hex(span->GetContext().span_id()), "0102030405060708");
EXPECT_EQ(span->GetContext().IsSampled(), false);
EXPECT_EQ(span->GetContext().IsRemote(), true);
}
TEST_F(CompositePropagatorTest, Inject)
{
TextMapCarrierTest carrier;
constexpr uint8_t buf_span[] = {1, 2, 3, 4, 5, 6, 7, 8};
constexpr uint8_t buf_trace[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
trace::SpanContext span_context{trace::TraceId{buf_trace}, trace::SpanId{buf_span},
trace::TraceFlags{true}, false};
nostd::shared_ptr<trace::Span> sp{new trace::DefaultSpan{span_context}};
// Set `sp` as the currently active span, which must be used by `Inject`.
trace::Scope scoped_span{sp};
composite_propagator_->Inject(carrier, context::RuntimeContext::GetCurrent());
EXPECT_EQ(carrier.headers_["traceparent"],
"00-0102030405060708090a0b0c0d0e0f10-0102030405060708-01");
EXPECT_EQ(carrier.headers_["b3"], "0102030405060708090a0b0c0d0e0f10-0102030405060708-1");
std::vector<std::string> fields;
composite_propagator_->Fields([&fields](nostd::string_view field) {
fields.push_back(field.data());
return true;
});
EXPECT_EQ(fields.size(), 3);
EXPECT_EQ(fields[0], trace::propagation::kTraceParent);
EXPECT_EQ(fields[1], trace::propagation::kTraceState);
EXPECT_EQ(fields[2], trace::propagation::kB3CombinedHeader);
}
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