text: // ArduinoJson - arduinojson.org
  // Copyright Benoit Blanchon 2014-2019
  // MIT License
  
  #include <ArduinoJson.h>
  #include <catch.hpp>
  #include <string>
  
  TEST_CASE("JsonObject::memoryUsage()") {
    DynamicJsonDocument doc(4096);
    JsonObject obj = doc.to<JsonObject>();
  
    SECTION("return 0 if uninitialized") {
      JsonObject unitialized;
      REQUIRE(unitialized.memoryUsage() == 0);
    }
  
    SECTION("JSON_OBJECT_SIZE(0) for empty object") {
      REQUIRE(obj.memoryUsage() == JSON_OBJECT_SIZE(0));
    }
  
    SECTION("JSON_OBJECT_SIZE(1) after add") {
      obj["hello"] = 42;
      REQUIRE(obj.memoryUsage() == JSON_OBJECT_SIZE(1));
    }
  
    SECTION("includes the size of the key") {
      obj[std::string("hello")] = 42;
      REQUIRE(obj.memoryUsage() == JSON_OBJECT_SIZE(1) + 6);
    }
  
    SECTION("includes the size of the nested array") {
      JsonArray nested = obj.createNestedArray("nested");
      nested.add(42);
      REQUIRE(obj.memoryUsage() == JSON_OBJECT_SIZE(1) + JSON_ARRAY_SIZE(1));
    }
  
    SECTION("includes the size of the nested object") {
      JsonObject nested = obj.createNestedObject("nested");
      nested["hello"] = "world";
      REQUIRE(obj.memoryUsage() == 2 * JSON_OBJECT_SIZE(1));
    }
  }
  