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#include <opentracing/dynamic_load.h>
#include <cstdio>
#include <fstream>
#include <iterator>
#include <random>
using namespace opentracing;
#define CATCH_CONFIG_RUNNER
#include <opentracing/catch2/catch.hpp>
static std::string mocktracer_library;
TEST_CASE("dynamic_load") {
std::string error_message;
SECTION(
"Dynamically loading a library that doesn't exists gives a proper error "
"code.") {
auto handle_maybe = DynamicallyLoadTracingLibrary("abc/123", error_message);
REQUIRE(!handle_maybe);
CHECK(handle_maybe.error() == dynamic_load_failure_error);
}
error_message.clear();
auto handle_maybe =
DynamicallyLoadTracingLibrary(mocktracer_library.c_str(), error_message);
REQUIRE(handle_maybe);
REQUIRE(error_message.empty());
SECTION("Creating a tracer from invalid json gives an error.") {
auto tracer_maybe =
handle_maybe->tracer_factory().MakeTracer("abc 123", error_message);
REQUIRE(!tracer_maybe);
}
SECTION("Creating a tracer with an invalid output_file gives an error.") {
auto tracer_maybe = handle_maybe->tracer_factory().MakeTracer(
R"({"output_file": ""})", error_message);
REQUIRE(!tracer_maybe);
REQUIRE(tracer_maybe.error() == invalid_configuration_error);
}
SECTION(
"We can create spans from an OpenTracing library dynamically loaded.") {
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 = handle_maybe->tracer_factory().MakeTracer(
configuration.c_str(), error_message);
REQUIRE(tracer_maybe);
auto tracer = *tracer_maybe;
tracer->StartSpan("abc");
tracer->Close();
}
std::ifstream istream{span_filename};
REQUIRE(istream.good());
std::string spans_json{std::istreambuf_iterator<char>{istream},
std::istreambuf_iterator<char>{}};
istream.close();
std::remove(span_filename.c_str());
CHECK(!spans_json.empty());
}
}
int main(int argc, char* argv[]) {
Catch::Session session;
using namespace Catch::clara;
auto cli = session.cli() | Opt(mocktracer_library,
"mocktracer_library")["--mocktracer_library"];
session.cli(cli);
int rcode = session.applyCommandLine(argc, argv);
if (rcode != 0) {
return rcode;
}
if (mocktracer_library.empty()) {
std::cerr << "Must provide mocktracer_library!\n";
return -1;
}
return session.run();
}
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