Add a test for self constructor promoted parameter

andersonamuller · andersonamuller · commit 6620ed4b5198 · 2026-03-10T13:58:10.000+01:00
- Introduce `DummyWithSelfConstructorPromotedParameter` test class to validate the normalization/denormalization.
diff --git a/Tests/Normalizer/AbstractObjectNormalizerTest.php b/Tests/Normalizer/AbstractObjectNormalizerTest.php
@@ -967,6 +967,18 @@ classMetadataFactory: new ClassMetadataFactory(new AttributeLoader()),
         $this->assertEquals(new DummyWithEnumUnion(EnumB::B), $serializer->denormalize($normalized, DummyWithEnumUnion::class));
     }
 
+    public function testDenormalizeSelfConstructorPromotedParameter()
+    {
+        $serializer = new Serializer([
+            new ObjectNormalizer(
+                propertyTypeExtractor: new PropertyInfoExtractor([], [new ReflectionExtractor()]),
+            ),
+        ]);
+
+        $normalized = $serializer->normalize(new DummyWithSelfConstructorPromotedParameter('A', new DummyWithSelfConstructorPromotedParameter('B')));
+        $this->assertEquals(new DummyWithSelfConstructorPromotedParameter('A', new DummyWithSelfConstructorPromotedParameter('B')), $serializer->denormalize($normalized, DummyWithSelfConstructorPromotedParameter::class));
+    }
+
     #[RequiresMethod(ReflectionTypeResolver::class, 'resolve')]
     public function testDenormalizeUsesConstructorUnionTypeWhenExtractorIsLessPrecise()
     {
@@ -1954,6 +1966,15 @@ public function __construct(
     }
 }
 
+class DummyWithSelfConstructorPromotedParameter
+{
+    public function __construct(
+        public readonly string $name,
+        public readonly ?self $partner = null,
+    ) {
+    }
+}
+
 class DummyWithIntOrString
 {
     public function __construct(
