From 8d7d783698cb1c41dc9a35c919413c586f14b745 Mon Sep 17 00:00:00 2001
From: Alan Taylor <alan@gtrbunny.com>
Date: Fri, 17 Feb 2023 23:58:23 +0900
Subject: [PATCH] Check if property is initialized before getting its value

This commit also removed the use of "setAccessible", since it's not
neccessary after PHP 8.1.

Co-authored-by: Henrique Moody <henriquemoody@gmail.com>
---
 CHANGELOG.md                              |  1 +
 library/Rules/Attribute.php               |  6 ++++--
 tests/library/Stubs/WithUninitialized.php | 17 +++++++++++++++++
 tests/unit/Rules/AttributeTest.php        |  9 +++++++++
 4 files changed, 31 insertions(+), 2 deletions(-)
 create mode 100644 tests/library/Stubs/WithUninitialized.php

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 607de5399..2401151f6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ Fixes:
  - `KeySet` now reports which extra keys are causing the rule to fail.
  - Ensure empty strings are never a valid currency code
  - Do not hide messages on EachException
+ - Dot not throw exception when validating an uninitialized property
 
 Changes:
 
diff --git a/library/Rules/Attribute.php b/library/Rules/Attribute.php
index e1873f13a..05518277b 100644
--- a/library/Rules/Attribute.php
+++ b/library/Rules/Attribute.php
@@ -17,7 +17,7 @@
 use function property_exists;
 
 /**
- * Validates an object attribute, event private ones.
+ * Validates an object attribute, even private ones.
  *
  * @author Alexandre Gomes Gaigalas <alganet@gmail.com>
  * @author Emmerson Siqueira <emmersonsiqueira@gmail.com>
@@ -38,7 +38,9 @@ public function __construct(string $reference, ?Validatable $rule = null, bool $
     public function getReferenceValue($input)
     {
         $propertyMirror = new ReflectionProperty($input, (string) $this->getReference());
-        $propertyMirror->setAccessible(true);
+        if ($propertyMirror->isInitialized($input) === false) {
+            return null;
+        }
 
         return $propertyMirror->getValue($input);
     }
diff --git a/tests/library/Stubs/WithUninitialized.php b/tests/library/Stubs/WithUninitialized.php
new file mode 100644
index 000000000..15ab30c1d
--- /dev/null
+++ b/tests/library/Stubs/WithUninitialized.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
+ * SPDX-License-Identifier: MIT
+ */
+
+declare(strict_types=1);
+
+namespace Respect\Validation\Test\Stubs;
+
+final class WithUninitialized
+{
+    public string $initialized = 'foo';
+
+    public string $uninitialized;
+}
diff --git a/tests/unit/Rules/AttributeTest.php b/tests/unit/Rules/AttributeTest.php
index 8d4dd74ef..678d138df 100644
--- a/tests/unit/Rules/AttributeTest.php
+++ b/tests/unit/Rules/AttributeTest.php
@@ -11,6 +11,7 @@
 
 use Respect\Validation\Test\RuleTestCase;
 use Respect\Validation\Test\Stubs\WithProperties;
+use Respect\Validation\Test\Stubs\WithUninitialized;
 
 /**
  * @group rule
@@ -47,6 +48,10 @@ public static function providerForValidInput(): array
                 new Attribute('public', new AlwaysValid()),
                 new WithProperties(),
             ],
+            'attribute is present but uninitialized' => [
+                new Attribute('uninitialized'),
+                new WithUninitialized(),
+            ],
             'non mandatory attribute is not present' => [
                 new Attribute('nonexistent', null, false),
                 new WithProperties(),
@@ -55,6 +60,10 @@ public static function providerForValidInput(): array
                 new Attribute('nonexistent', new AlwaysValid(), false),
                 new WithProperties(),
             ],
+            'attribute is present but uninitialized with extra validator' => [
+                new Attribute('uninitialized', new AlwaysValid()),
+                new WithUninitialized(),
+            ],
         ];
     }