IBX-9678: JsonSerializableNormalizer return type mismatch causing 500 error

src/lib/Output/Normalizer/JsonSerializableNormalizer.php

@@ -20,9 +20,11 @@ final class JsonSerializableNormalizer implements NormalizerInterface, Normalize
     /**
      * @param array<mixed> $context
      *
+     * @return string|array<mixed>
+     *
      * {@inheritDoc}
      */
-    public function normalize($object, ?string $format = null, array $context = []): string
+    public function normalize($object, ?string $format = null, array $context = []): string|array
     {
         assert($object instanceof JsonSerializable);
 

tests/lib/Output/MoneyObject.php

@@ -0,0 +1,30 @@
+<?php
+
+/**
+ * @copyright Copyright (C) Ibexa AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+
+namespace Ibexa\Tests\Rest\Output;
+
+class MoneyObject implements \JsonSerializable
+{
+    private int $amount;
+
+    private string $currency;
+
+    public function __construct(int $amount, string $currency)
+    {
+        $this->amount = $amount;
+        $this->currency = $currency;
+    }
+
+    #[\ReturnTypeWillChange]
+    public function jsonSerialize()
+    {
+        return [
+            'amount' => $this->amount,
+            'currency' => $this->currency,
+        ];
+    }
+}

tests/lib/Output/Normalizer/ArrayNormalizerTest.php

@@ -0,0 +1,28 @@
+<?php
+
+/**
+ * @copyright Copyright (C) Ibexa AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+
+namespace Ibexa\Tests\Rest\Output\Normalizer;
+
+use Ibexa\Rest\Output\Normalizer\JsonSerializableNormalizer;
+use Ibexa\Tests\Rest\Output\MoneyObject;
+use PHPUnit\Framework\TestCase;
+
+class ArrayNormalizerTest extends TestCase
+{
+    public function testNormalizeArray(): void
+    {
+        $normalizer = new JsonSerializableNormalizer();
+        $money = new MoneyObject(100, 'EUR');
+
+        $result = $normalizer->normalize($money);
+
+        self::assertIsArray($result);
+
+        self::assertSame(100, $result['amount']);
+        self::assertSame('EUR', $result['currency']);
+    }
+}