added library json

libraries/ArduinoJson/extras/tests/Helpers/CustomReader.hpp

@@ -0,0 +1,24 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2023, Benoit BLANCHON
+// MIT License
+
+#pragma once
+
+#include <sstream>
+
+class CustomReader {
+  std::stringstream stream_;
+
+ public:
+  CustomReader(const char* input) : stream_(input) {}
+  CustomReader(const CustomReader&) = delete;
+
+  int read() {
+    return stream_.get();
+  }
+
+  size_t readBytes(char* buffer, size_t length) {
+    stream_.read(buffer, static_cast<std::streamsize>(length));
+    return static_cast<size_t>(stream_.gcount());
+  }
+};