first commit

libraries/ArduinoJson/extras/tests/JsonSerializer/misc.cpp

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+#include <ArduinoJson.h>
+#include <catch.hpp>
+#include <limits>
+
+TEST_CASE("serializeJson(MemberProxy)") {
+  JsonDocument doc;
+  deserializeJson(doc, "{\"hello\":42}");
+  JsonObject obj = doc.as<JsonObject>();
+  std::string result;
+
+  serializeJson(obj["hello"], result);
+
+  REQUIRE(result == "42");
+}
+
+TEST_CASE("serializeJson(ElementProxy)") {
+  JsonDocument doc;
+  deserializeJson(doc, "[42]");
+  JsonArray arr = doc.as<JsonArray>();
+  std::string result;
+
+  serializeJson(arr[0], result);
+
+  REQUIRE(result == "42");
+}
+
+TEST_CASE("serializeJson(JsonVariantSubscript)") {
+  JsonDocument doc;
+  deserializeJson(doc, "[42]");
+  JsonVariant var = doc.as<JsonVariant>();
+  std::string result;
+
+  serializeJson(var[0], result);
+
+  REQUIRE(result == "42");
+}