text: // ArduinoJson - arduinojson.org
  // Copyright Benoit Blanchon 2014-2020
  // MIT License
  
  #include <ArduinoJson.h>
  #include <stdint.h>
  #include <catch.hpp>
  
  static const char* null = 0;
  
  TEST_CASE("JsonVariant::containsKey()") {
    DynamicJsonDocument doc(4096);
    JsonVariant var = doc.to<JsonVariant>();
  
    SECTION("containsKey(const char*) returns true") {
      var["hello"] = "world";
  
      REQUIRE(var.containsKey("hello") == true);
      REQUIRE(var.containsKey("world") == false);
    }
  
    SECTION("containsKey(std::string) returns true") {
      var["hello"] = "world";
  
      REQUIRE(var.containsKey(std::string("hello")) == true);
      REQUIRE(var.containsKey(std::string("world")) == false);
    }
  }
  
  TEST_CASE("JsonVariantConst::containsKey()") {
    DynamicJsonDocument doc(4096);
    doc["hello"] = "world";
    JsonVariantConst cvar = doc.as<JsonVariant>();
  
    SECTION("containsKey(const char*) returns true") {
      REQUIRE(cvar.containsKey("hello") == true);
      REQUIRE(cvar.containsKey("world") == false);
    }
  
    SECTION("containsKey(std::string) returns true") {
      REQUIRE(cvar.containsKey(std::string("hello")) == true);
      REQUIRE(cvar.containsKey(std::string("world")) == false);
    }
  }
  