[Workflow] Catch error when trying to get an uninitialized marking

Author: lyrixx

MarkingStore/MethodMarkingStore.php

@@ -54,7 +54,15 @@ public function getMarking($subject): Marking
             throw new LogicException(sprintf('The method "%s::%s()" does not exist.', \get_class($subject), $method));
         }
 
-        $marking = $subject->{$method}();
+        $marking = null;
+        try {
+            $marking = $subject->{$method}();
+        } catch (\Error $e) {
+            $unInitializedPropertyMassage = sprintf('Typed property %s::$%s must not be accessed before initialization', get_debug_type($subject), $this->property);
+            if ($e->getMessage() !== $unInitializedPropertyMassage) {
+                throw $e;
+            }
+        }
 
         if (null === $marking) {
             return new Marking();

Tests/MarkingStore/MethodMarkingStoreTest.php

@@ -78,6 +78,36 @@ public function testGetMarkingWithValueObject()
         $this->assertSame('first_place', (string) $subject->getMarking());
     }
 
+    /**
+     * @requires PHP 7.4
+     */
+    public function testGetMarkingWithUninitializedProperty()
+    {
+        $subject = new SubjectWithType();
+
+        $markingStore = new MethodMarkingStore(true);
+
+        $marking = $markingStore->getMarking($subject);
+
+        $this->assertInstanceOf(Marking::class, $marking);
+        $this->assertCount(0, $marking->getPlaces());
+    }
+
+    /**
+     * @requires PHP 7.4
+     */
+    public function testGetMarkingWithUninitializedProperty2()
+    {
+        $subject = new SubjectWithType();
+
+        $markingStore = new MethodMarkingStore(true, 'marking2');
+
+        $this->expectException(\Error::class);
+        $this->expectExceptionMessage('Typed property Symfony\Component\Workflow\Tests\MarkingStore\SubjectWithType::$marking must not be accessed before initialization');
+
+        $markingStore->getMarking($subject);
+    }
+
     private function createValueObject(string $markingValue)
     {
         return new class($markingValue) {

Tests/MarkingStore/SubjectWithType.php

@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Workflow\Tests\MarkingStore;
+
+class SubjectWithType
+{
+    private string $marking;
+
+    public function getMarking(): string
+    {
+        return $this->marking;
+    }
+
+    public function setMarking(string $type): void
+    {
+        $this->marking = $type;
+    }
+
+    public function getMarking2(): string
+    {
+        // Typo made on purpose!
+        return $this->marking;
+    }
+}