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-rw-r--r--mocktracer/test/propagation_test.cpp236
1 files changed, 236 insertions, 0 deletions
diff --git a/mocktracer/test/propagation_test.cpp b/mocktracer/test/propagation_test.cpp
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+++ b/mocktracer/test/propagation_test.cpp
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+#include <opentracing/mocktracer/in_memory_recorder.h>
+#include <opentracing/mocktracer/tracer.h>
+#include <opentracing/noop.h>
+#include <sstream>
+#include <string>
+#include <unordered_map>
+
+#define CATCH_CONFIG_MAIN
+#include <opentracing/catch2/catch.hpp>
+using namespace opentracing;
+using namespace mocktracer;
+
+struct TextMapCarrier : TextMapReader, TextMapWriter {
+ TextMapCarrier(std::unordered_map<std::string, std::string>& text_map_)
+ : text_map(text_map_) {}
+
+ expected<void> Set(string_view key, string_view value) const override {
+ text_map[key] = value;
+ return {};
+ }
+
+ expected<string_view> LookupKey(string_view key) const override {
+ if (!supports_lookup) {
+ return make_unexpected(lookup_key_not_supported_error);
+ }
+ auto iter = text_map.find(key);
+ if (iter != text_map.end()) {
+ return string_view{iter->second};
+ } else {
+ return make_unexpected(key_not_found_error);
+ }
+ }
+
+ expected<void> ForeachKey(
+ std::function<expected<void>(string_view key, string_view value)> f)
+ const override {
+ ++foreach_key_call_count;
+ for (const auto& key_value : text_map) {
+ auto result = f(key_value.first, key_value.second);
+ if (!result) return result;
+ }
+ return {};
+ }
+
+ bool supports_lookup = false;
+ mutable int foreach_key_call_count = 0;
+ std::unordered_map<std::string, std::string>& text_map;
+};
+
+struct HTTPHeadersCarrier : HTTPHeadersReader, HTTPHeadersWriter {
+ HTTPHeadersCarrier(std::unordered_map<std::string, std::string>& text_map_)
+ : text_map(text_map_) {}
+
+ expected<void> Set(string_view key, string_view value) const override {
+ text_map[key] = value;
+ return {};
+ }
+
+ expected<void> ForeachKey(
+ std::function<expected<void>(string_view key, string_view value)> f)
+ const override {
+ for (const auto& key_value : text_map) {
+ auto result = f(key_value.first, key_value.second);
+ if (!result) return result;
+ }
+ return {};
+ }
+
+ std::unordered_map<std::string, std::string>& text_map;
+};
+
+TEST_CASE("propagation") {
+ const char* propagation_key = "propagation-key";
+ auto recorder = new InMemoryRecorder{};
+ MockTracerOptions tracer_options;
+ tracer_options.propagation_options.propagation_key = propagation_key;
+ tracer_options.recorder.reset(recorder);
+ auto tracer = std::shared_ptr<opentracing::Tracer>{
+ new MockTracer{std::move(tracer_options)}};
+ std::unordered_map<std::string, std::string> text_map;
+ TextMapCarrier text_map_carrier(text_map);
+ HTTPHeadersCarrier http_headers_carrier(text_map);
+ auto span = tracer->StartSpan("a");
+ CHECK(span);
+ span->SetBaggageItem("abc", "123");
+
+ SECTION("Propagation uses the specified propagation_key.") {
+ CHECK(tracer->Inject(span->context(), text_map_carrier));
+ CHECK(text_map.count(propagation_key) == 1);
+ }
+
+ SECTION("Inject, extract, inject yields the same text_map.") {
+ CHECK(tracer->Inject(span->context(), text_map_carrier));
+ auto injection_map1 = text_map;
+ auto span_context_maybe = tracer->Extract(text_map_carrier);
+ CHECK((span_context_maybe && span_context_maybe->get()));
+ text_map.clear();
+ CHECK(tracer->Inject(*span_context_maybe->get(), text_map_carrier));
+ CHECK(injection_map1 == text_map);
+ }
+
+ SECTION("Inject, extract, inject yields the same binary blob.") {
+ std::ostringstream oss(std::ios::binary);
+ CHECK(tracer->Inject(span->context(), oss));
+ auto blob = oss.str();
+ std::istringstream iss(blob, std::ios::binary);
+ auto span_context_maybe = tracer->Extract(iss);
+ CHECK((span_context_maybe && span_context_maybe->get()));
+ std::ostringstream oss2(std::ios::binary);
+ CHECK(tracer->Inject(*span_context_maybe->get(), oss2));
+ CHECK(blob == oss2.str());
+ }
+
+ SECTION(
+ "Extracing a context from an empty text-map gives a null span context.") {
+ auto span_context_maybe = tracer->Extract(text_map_carrier);
+ CHECK(span_context_maybe);
+ CHECK(span_context_maybe->get() == nullptr);
+ }
+
+ SECTION("Injecting a non-Mock span returns invalid_span_context_error.") {
+ auto noop_tracer = opentracing::MakeNoopTracer();
+ CHECK(noop_tracer);
+ auto noop_span = noop_tracer->StartSpan("a");
+ CHECK(noop_span);
+ auto was_successful =
+ tracer->Inject(noop_span->context(), text_map_carrier);
+ CHECK(!was_successful);
+ CHECK(was_successful.error() == opentracing::invalid_span_context_error);
+ }
+
+ SECTION("Extract is insensitive to changes in case for http header fields") {
+ CHECK(tracer->Inject(span->context(), http_headers_carrier));
+
+ // Change the case of one of the fields.
+ auto key_value = *std::begin(text_map);
+ text_map.erase(std::begin(text_map));
+ auto key = key_value.first;
+ key[0] = key[0] == std::toupper(key[0])
+ ? static_cast<char>(std::tolower(key[0]))
+ : static_cast<char>(std::toupper(key[0]));
+ text_map[key] = key_value.second;
+ CHECK(tracer->Extract(http_headers_carrier));
+ }
+
+ SECTION("Extract/Inject fail if a stream has failure bits set.") {
+ std::ostringstream oss(std::ios::binary);
+ oss.setstate(std::ios_base::failbit);
+ CHECK(!tracer->Inject(span->context(), oss));
+ oss.clear();
+ CHECK(tracer->Inject(span->context(), oss));
+ auto blob = oss.str();
+ std::istringstream iss(blob, std::ios::binary);
+ iss.setstate(std::ios_base::failbit);
+ CHECK(!tracer->Extract(iss));
+ }
+
+ SECTION(
+ "Extracting a span from an invalid binary blob returns "
+ "an error.") {
+ std::string invalid_context = "abc123xyz321qrs42";
+ std::istringstream iss{invalid_context, std::ios::binary};
+ auto span_context_maybe = tracer->Extract(iss);
+ CHECK(!span_context_maybe);
+ }
+
+ SECTION("Calling Extract on an empty stream yields a nullptr.") {
+ std::string blob;
+ std::istringstream iss(blob, std::ios::binary);
+ auto span_context_maybe = tracer->Extract(iss);
+ CHECK(span_context_maybe);
+ CHECK(span_context_maybe->get() == nullptr);
+ }
+
+ SECTION("If a carrier supports LookupKey, then ForeachKey won't be called") {
+ CHECK(tracer->Inject(span->context(), text_map_carrier));
+ CHECK(text_map.size() == 1);
+ text_map_carrier.supports_lookup = true;
+ auto span_context_maybe = tracer->Extract(text_map_carrier);
+ CHECK((span_context_maybe && span_context_maybe->get()));
+ CHECK(text_map_carrier.foreach_key_call_count == 0);
+ }
+
+ SECTION(
+ "When LookupKey is used, a nullptr is returned if there is no "
+ "span_context") {
+ text_map.clear();
+ text_map_carrier.supports_lookup = true;
+ auto span_context_maybe = tracer->Extract(text_map_carrier);
+ CHECK((span_context_maybe && span_context_maybe->get() == nullptr));
+ CHECK(text_map_carrier.foreach_key_call_count == 0);
+ }
+
+ SECTION("Verify only valid base64 characters are used.") {
+ CHECK(tracer->Inject(span->context(), text_map_carrier));
+ CHECK(text_map.size() == 1);
+ // Follows the guidelines given in RFC-4648 on what characters are
+ // permissible. See
+ // http://www.rfc-editor.org/rfc/rfc4648.txt
+ auto iter = text_map.begin();
+ CHECK(iter != text_map.end());
+ auto value = iter->second;
+ auto is_base64_char = [](char c) {
+ return ('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z') ||
+ ('0' <= c && c <= '9') || c == '+' || c == '/' || c == '=';
+ };
+ CHECK(std::all_of(value.begin(), value.end(), is_base64_char));
+ CHECK(value.size() % 4 == 0);
+ }
+
+ SECTION("Inject fails if inject_error_code is non-zero.") {
+ MockTracerOptions tracer_options_fail;
+ auto error_code = std::make_error_code(std::errc::network_down);
+ tracer_options_fail.propagation_options.inject_error_code = error_code;
+ tracer = std::shared_ptr<opentracing::Tracer>{
+ new MockTracer{std::move(tracer_options_fail)}};
+
+ std::ostringstream oss;
+ auto rcode = tracer->Inject(span->context(), oss);
+ CHECK(!rcode);
+ CHECK(rcode.error() == error_code);
+ }
+
+ SECTION("Extract fails if extract_error_code is non-zero.") {
+ MockTracerOptions tracer_options_fail;
+ auto error_code = std::make_error_code(std::errc::network_down);
+ tracer_options_fail.propagation_options.extract_error_code = error_code;
+ tracer = std::shared_ptr<opentracing::Tracer>{
+ new MockTracer{std::move(tracer_options_fail)}};
+
+ CHECK(tracer->Inject(span->context(), text_map_carrier));
+ auto span_context_maybe = tracer->Extract(text_map_carrier);
+ CHECK(!span_context_maybe);
+ CHECK(span_context_maybe.error() == error_code);
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-24 12:00:17 +0000