ArduinoJson/extras/tests/MsgPackSerializer/serializeObject.cpp

// ArduinoJson - https://arduinojson.org
// Copyright © 2014-2025, Benoit BLANCHON
// MIT License

#include <ArduinoJson.h>
#include <stdio.h>
#include <catch.hpp>

#include "Literals.hpp"

static void check(const JsonObject object, const char* expected_data,
                  size_t expected_len) {
  std::string expected(expected_data, expected_data + expected_len);
  std::string actual;
  size_t len = serializeMsgPack(object, actual);
  CAPTURE(object);
  REQUIRE(len == expected_len);
  REQUIRE(actual == expected);
}

template <size_t N>
static void check(const JsonObject object, const char (&expected_data)[N]) {
  const size_t expected_len = N - 1;
  check(object, expected_data, expected_len);
}

// TODO: used by the commented test
// static void check(const JsonObject object, const std::string& expected) {
//  check(object, expected.data(), expected.length());
//}

TEST_CASE("serialize MsgPack object") {
  JsonDocument doc;
  JsonObject object = doc.to<JsonObject>();

  SECTION("empty") {
    check(object, "\x80");
  }

  SECTION("fixmap") {
    object["hello"] = "world";

    check(object, "\x81\xA5hello\xA5world");
  }

  SECTION("map 16") {
    for (int i = 0; i < 16; ++i) {
      char key[16];
      snprintf(key, sizeof(key), "i%X", i);
      object[key] = i;
    }

    check(object,
          "\xDE\x00\x10\xA2i0\x00\xA2i1\x01\xA2i2\x02\xA2i3\x03\xA2i4\x04\xA2i5"
          "\x05\xA2i6\x06\xA2i7\x07\xA2i8\x08\xA2i9\x09\xA2iA\x0A\xA2iB\x0B\xA2"
          "iC\x0C\xA2iD\x0D\xA2iE\x0E\xA2iF\x0F");
  }

  // TODO: improve performance and uncomment
  // SECTION("map 32") {
  //   std::string expected("\xDF\x00\x01\x00\x00", 5);
  //
  //   for (int i = 0; i < 65536; ++i) {
  //     char kv[16];
  //     snprintf(kv, sizeof(kv), "%04x", i);
  //     object[kv] = kv;
  //     expected += '\xA4';
  //     expected += kv;
  //     expected += '\xA4';
  //     expected += kv;
  //   }
  //
  //   check(object, expected);
  // }

  SECTION("serialized(const char*)") {
    object["hello"] = serialized("\xDB\x00\x01\x00\x00", 5);
    check(object, "\x81\xA5hello\xDB\x00\x01\x00\x00");
  }

  SECTION("serialized(std::string)") {
    object["hello"] = serialized("\xDB\x00\x01\x00\x00"_s);
    check(object, "\x81\xA5hello\xDB\x00\x01\x00\x00");
  }
}