// ArduinoJson - https://arduinojson.org // Copyright © 2014-2022, Benoit BLANCHON // MIT License #include <ArduinoJson.h> #include <catch.hpp> TEST_CASE("JsonDocument::isNull()") { DynamicJsonDocument doc(4096); SECTION("returns true if uninitialized") { REQUIRE(doc.isNull() == true); } SECTION("returns false after to<JsonObject>()") { doc.to<JsonObject>(); REQUIRE(doc.isNull() == false); } SECTION("returns false after to<JsonArray>()") { doc.to<JsonArray>(); REQUIRE(doc.isNull() == false); } SECTION("returns true after to<JsonVariant>()") { REQUIRE(doc.isNull() == true); } SECTION("returns false after set()") { doc.to<JsonVariant>().set(42); REQUIRE(doc.isNull() == false); } SECTION("returns true after clear()") { doc.to<JsonObject>(); doc.clear(); REQUIRE(doc.isNull() == true); } }