From 35e7c1acfa654aa4b1b893d5fe1eafbaf49ca3c5 Mon Sep 17 00:00:00 2001
From: Vladislav Polyakov <39828645+polRk@users.noreply.github.com>
Date: Mon, 19 Dec 2022 17:08:39 +0300
Subject: [PATCH] fix: make res.statusCode optional (#4471)
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* fix: make res.statusCode optional

* test: add tests

Co-authored-by: Поляков Владислав Михайлович <VMikPolyakov@sber.ru>
---
 test/types/logger.test-d.ts | 15 +++++++++++++++
 types/logger.d.ts           |  2 +-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/test/types/logger.test-d.ts b/test/types/logger.test-d.ts
index fc23d6a2ca..10a570a1ba 100644
--- a/test/types/logger.test-d.ts
+++ b/test/types/logger.test-d.ts
@@ -123,6 +123,21 @@ const serverAutoInferredFileOption = fastify({
 
 expectType<FastifyBaseLogger>(serverAutoInferredFileOption.log)
 
+const serverAutoInferredSerializerResponseObjectOption = fastify({
+  logger: {
+    serializers: {
+      res (ServerResponse) {
+        expectType<FastifyReply>(ServerResponse)
+        return {
+          status: '200'
+        }
+      }
+    }
+  }
+})
+
+expectType<FastifyBaseLogger>(serverAutoInferredSerializerResponseObjectOption.log)
+
 const serverAutoInferredSerializerObjectOption = fastify({
   logger: {
     serializers: {
diff --git a/types/logger.d.ts b/types/logger.d.ts
index fb2ce80efc..5ae6393e36 100644
--- a/types/logger.d.ts
+++ b/types/logger.d.ts
@@ -60,7 +60,7 @@ export interface FastifyLoggerOptions<
       [key: string]: unknown;
     };
     res?: (res: RawReply) => {
-      statusCode: string | number;
+      statusCode?: string | number;
       [key: string]: unknown;
     };
   };