text: // ArduinoJson - arduinojson.org
  // Copyright Benoit Blanchon 2014-2020
  // MIT License
  
  #include <ArduinoJson.h>
  #include <catch.hpp>
  
  using namespace Catch::Matchers;
  
  TEST_CASE("Undefined JsonArray") {
    JsonArray array;
  
    SECTION("SubscriptFails") {
      REQUIRE(array[0].isNull());
    }
  
    SECTION("AddFails") {
      array.add(1);
      REQUIRE(0 == array.size());
    }
  
    SECTION("CreateNestedArrayFails") {
      REQUIRE(array.createNestedArray().isNull());
    }
  
    SECTION("CreateNestedObjectFails") {
      REQUIRE(array.createNestedObject().isNull());
    }
  
    SECTION("PrintToWritesBrackets") {
      char buffer[32];
      serializeJson(array, buffer, sizeof(buffer));
      REQUIRE_THAT(buffer, Equals("null"));
    }
  }
  