From 1620e82414a8f703e00010f472a39e0b08b86372 Mon Sep 17 00:00:00 2001
From: Sanel Hadzini <sanel.hadzini@yahoo.com>
Date: Tue, 12 Oct 2021 14:38:08 +0200
Subject: [PATCH] fix(isUUID) for null version argument supply

---
 src/lib/isUUID.js  | 11 +++++++++--
 test/validators.js | 18 ++++++++++++++++++
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/src/lib/isUUID.js b/src/lib/isUUID.js
index 61d938ac3..0174ae745 100644
--- a/src/lib/isUUID.js
+++ b/src/lib/isUUID.js
@@ -7,8 +7,15 @@ const uuid = {
   all: /^[0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12}$/i,
 };
 
-export default function isUUID(str, version = 'all') {
+function extractUUIDVersion(version) {
+  const isKnownVersion = Object.keys(uuid).includes(String(version));
+  if (isKnownVersion) return version;
+  return version ? undefined : 'all';
+}
+
+export default function isUUID(str, version) {
   assertString(str);
-  const pattern = uuid[version];
+  const uuidVersion = extractUUIDVersion(version);
+  const pattern = uuid[uuidVersion];
   return pattern && pattern.test(str);
 }
diff --git a/test/validators.js b/test/validators.js
index 91794d521..12db2030f 100644
--- a/test/validators.js
+++ b/test/validators.js
@@ -4413,6 +4413,24 @@ describe('Validators', () => {
         'AAAAAAAA-1111-1111-AAAG-111111111111',
       ],
     });
+    test({
+      validator: 'isUUID',
+      args: [null],
+      valid: [
+        'A117FBC9-4BED-3078-CF07-9141BA07C9F3',
+        'A117FBC9-4BED-4078-8F07-9141BA07C9F3',
+        'A117FBC9-4BED-5078-AF07-9141BA07C9F3',
+      ],
+      invalid: [
+        '',
+        'xxxA987FBC9-4BED-3078-CF07-9141BA07C9F3',
+        'A117FBC9-4BED-3078-CF07-9141BA07C9F3xxx',
+        'A117FBC94BED3078CF079141BA07C9F3',
+        '911859',
+        '911FBC9-4BED-3078-CF07A-9141BA07C9F3',
+        'A11AAAAA-1111-1111-AAAG-111111111111',
+      ],
+    });
     test({
       validator: 'isUUID',
       args: [3],