Added tests for serializer normalizers

src/Serializer/BigNumberNormalizer.php

@@ -0,0 +1,50 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2023 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace App\Serializer;
+
+use Brick\Math\BigDecimal;
+use Brick\Math\BigNumber;
+use Symfony\Component\Serializer\Normalizer\CacheableSupportsMethodInterface;
+use Symfony\Component\Serializer\Normalizer\ContextAwareNormalizerInterface;
+use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
+
+class BigNumberNormalizer implements NormalizerInterface, CacheableSupportsMethodInterface
+{
+
+    public function supportsNormalization($data, string $format = null): bool
+    {
+        return $data instanceof BigNumber;
+    }
+
+    public function normalize($object, string $format = null, array $context = []): string
+    {
+        if (!$object instanceof BigNumber) {
+            throw new \InvalidArgumentException('This normalizer only supports BigNumber objects!');
+        }
+
+        return (string) $object;
+    }
+
+    public function hasCacheableSupportsMethod(): bool
+    {
+        return true;
+    }
+}