Add ARDUINOJSON_STRING_LENGTH_SIZE to the namespace name

extras/tests/MixedConfiguration/string_length_size_4.cpp

@@ -0,0 +1,32 @@
+#define ARDUINOJSON_STRING_LENGTH_SIZE 4
+#include <ArduinoJson.h>
+
+#include <catch.hpp>
+#include <string>
+
+TEST_CASE("ARDUINOJSON_STRING_LENGTH_SIZE == 4") {
+  JsonDocument doc;
+
+  SECTION("set() returns true if string has 65536 characters") {
+    auto result = doc.set(std::string(65536, '?'));
+
+    REQUIRE(result == true);
+    REQUIRE(doc.overflowed() == false);
+  }
+
+  SECTION("deserializeJson() returns Ok if string has 65536 characters") {
+    auto input = "\"" + std::string(65536, '?') + "\"";
+
+    auto err = deserializeJson(doc, input);
+
+    REQUIRE(err == DeserializationError::Ok);
+  }
+
+  SECTION("deserializeMsgPack() returns Ok of string has 65536 characters") {
+    auto input = "\xda\xff\xff" + std::string(65536, '?');
+
+    auto err = deserializeMsgPack(doc, input);
+
+    REQUIRE(err == DeserializationError::Ok);
+  }
+}