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#include <opentracing/mocktracer/tracer_factory.h>
#include <cstdio>
#include <random>
#include <string>
#define CATCH_CONFIG_MAIN
#include <opentracing/catch2/catch.hpp>
using namespace opentracing;
using namespace mocktracer;
TEST_CASE("tracer_factory") {
MockTracerFactory tracer_factory;
std::string error_message;
SECTION("Creating a tracer from a nullptr yields an error.") {
const char* configuration = nullptr;
auto tracer_maybe = tracer_factory.MakeTracer(configuration, error_message);
REQUIRE(!tracer_maybe);
REQUIRE(!error_message.empty());
}
SECTION("Creating a tracer from an empty string yields an error.") {
const char* configuration = "";
auto tracer_maybe = tracer_factory.MakeTracer(configuration, error_message);
REQUIRE(!tracer_maybe);
REQUIRE(!error_message.empty());
}
SECTION("Creating a tracer from invalid JSON yields an error.") {
const char* configuration = "{ abc";
auto tracer_maybe = tracer_factory.MakeTracer(configuration, error_message);
REQUIRE(!tracer_maybe);
REQUIRE(!error_message.empty());
}
SECTION(
"Creating a tracer from valid JSON but an invalid configuration "
"yields an error.") {
const char* configuration = R"({ "abc": 123 })";
auto tracer_maybe = tracer_factory.MakeTracer(configuration, error_message);
REQUIRE(!tracer_maybe);
REQUIRE(!error_message.empty());
REQUIRE(tracer_maybe.error() == invalid_configuration_error);
}
SECTION("Creating a tracer with an invalid output_file yields an error.") {
const char* configuration = R"({ "output_file": "" })";
auto tracer_maybe = tracer_factory.MakeTracer(configuration, error_message);
REQUIRE(!tracer_maybe);
REQUIRE(!error_message.empty());
REQUIRE(tracer_maybe.error() == invalid_configuration_error);
}
SECTION("Creating a tracer with a valid config succeeds.") {
std::string span_filename{"spans."};
const auto random_id = std::random_device{}();
span_filename.append(std::to_string(random_id));
std::string configuration = R"({ "output_file": ")";
configuration.append(span_filename);
configuration.append(R"(" })");
auto tracer_maybe =
tracer_factory.MakeTracer(configuration.c_str(), error_message);
REQUIRE(tracer_maybe);
std::remove(span_filename.c_str());
}
}
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