Update libs

lib/ArduinoJson/extras/tests/Misc/issue2129.cpp

@@ -0,0 +1,55 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2024, Benoit BLANCHON
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+template <typename T>
+class Nullable {
+ public:
+  Nullable() : value_{} {}
+  Nullable(T value) : value_{value} {}
+
+  operator T() const {
+    return value_;
+  }
+
+  operator T&() {
+    return value_;
+  }
+
+  bool is_valid() const {
+    return value_ != invalid_value_;
+  }
+
+  T value() const {
+    return value_;
+  }
+
+ private:
+  T value_;
+  static T invalid_value_;
+};
+
+template <>
+float Nullable<float>::invalid_value_ = std::numeric_limits<float>::lowest();
+
+template <typename T>
+void convertToJson(const Nullable<T>& src, JsonVariant dst) {
+  if (src.is_valid()) {
+    dst.set(src.value());
+  } else {
+    dst.clear();
+  }
+}
+
+TEST_CASE("Issue #2129") {
+  Nullable<float> nullable_value = Nullable<float>{123.4f};
+
+  JsonDocument doc;
+
+  doc["value"] = nullable_value;
+
+  REQUIRE(doc["value"].as<float>() == Approx(123.4f));
+}