Add more tests for JsonArrayConst

extras/tests/JsonArrayConst/subscript.cpp

@@ -0,0 +1,20 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2024, Benoit BLANCHON
+// MIT License
+
+#include <ArduinoJson.h>
+#include <stdint.h>
+#include <catch.hpp>
+
+TEST_CASE("JsonArrayConst::operator[]") {
+  JsonDocument doc;
+  JsonArrayConst arr = doc.to<JsonArray>();
+  doc.add(1);
+  doc.add(2);
+  doc.add(3);
+
+  REQUIRE(1 == arr[0].as<int>());
+  REQUIRE(2 == arr[1].as<int>());
+  REQUIRE(3 == arr[2].as<int>());
+  REQUIRE(0 == arr[3].as<int>());
+}