From cd5566cd40ab669403cb701752a14743c41cbecd Mon Sep 17 00:00:00 2001
From: Benoit Blanchon <git@benoitblanchon.fr>
Date: Sat, 6 May 2023 10:32:33 +0200
Subject: [PATCH] Add a test for #1922

---
 extras/tests/JsonVariant/converters.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/extras/tests/JsonVariant/converters.cpp b/extras/tests/JsonVariant/converters.cpp
index 89b34ded..cd4e7c21 100644
--- a/extras/tests/JsonVariant/converters.cpp
+++ b/extras/tests/JsonVariant/converters.cpp
@@ -152,3 +152,16 @@ TEST_CASE("ConverterNeedsWriteableRef") {
   CHECK(ConverterNeedsWriteableRef<JsonArray>::value == true);
   CHECK(ConverterNeedsWriteableRef<JsonArrayConst>::value == false);
 }
+
+namespace ArduinoJson {
+void convertToJson(char c, JsonVariant var) {
+  char buf[] = {c, 0};
+  var.set(buf);
+}
+}  // namespace ArduinoJson
+
+TEST_CASE("Convert char to string") {  // issue #1922
+  StaticJsonDocument<64> doc;
+  doc.set('a');
+  REQUIRE(doc.as<std::string>() == "a");
+}