From aebf042baeb08435ca22bd583e5ee3df82e03d46 Mon Sep 17 00:00:00 2001
From: Benoit Blanchon <git@benoitblanchon.fr>
Date: Thu, 24 Aug 2023 09:43:23 +0200
Subject: [PATCH] Test custom converter for `char` (#1963)

---
 extras/tests/JsonVariant/converters.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/extras/tests/JsonVariant/converters.cpp b/extras/tests/JsonVariant/converters.cpp
index cd4e7c21..89afc9b7 100644
--- a/extras/tests/JsonVariant/converters.cpp
+++ b/extras/tests/JsonVariant/converters.cpp
@@ -158,6 +158,11 @@ void convertToJson(char c, JsonVariant var) {
   char buf[] = {c, 0};
   var.set(buf);
 }
+
+void convertFromJson(JsonVariantConst src, char& dst) {
+  auto p = src.as<const char*>();
+  dst = p ? p[0] : 0;
+}
 }  // namespace ArduinoJson
 
 TEST_CASE("Convert char to string") {  // issue #1922
@@ -165,3 +170,9 @@ TEST_CASE("Convert char to string") {  // issue #1922
   doc.set('a');
   REQUIRE(doc.as<std::string>() == "a");
 }
+
+TEST_CASE("Convert string to char") {  // issue #1963
+  StaticJsonDocument<64> doc;
+  doc.set("a");
+  REQUIRE(doc.as<char>() == 'a');
+}