added test (#4389)

Co-authored-by: Ng Kiat Siong <kiatsiong.ng@gmail.com>

Author: sreichel

tests/unit/Mage/Core/Helper/UnserializeArrayTest.php

@@ -0,0 +1,70 @@
+<?php
+
+/**
+ * OpenMage
+ *
+ * This source file is subject to the Open Software License (OSL 3.0)
+ * that is bundled with this package in the file LICENSE.txt.
+ * It is also available at https://opensource.org/license/osl-3-0-php
+ *
+ * @category   OpenMage
+ * @package    OpenMage_Tests
+ * @copyright  Copyright (c) 2024 The OpenMage Contributors (https://www.openmage.org)
+ * @license    https://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
+ */
+
+declare(strict_types=1);
+
+namespace OpenMage\Tests\Unit\Mage\Core\Helper;
+
+use Exception;
+use Generator;
+use Mage;
+use Mage_Core_Helper_UnserializeArray;
+use PHPUnit\Framework\TestCase;
+use Varien_Object;
+
+class UnserializeArrayTest extends TestCase
+{
+    public Mage_Core_Helper_UnserializeArray $subject;
+
+    public function setUp(): void
+    {
+        Mage::app();
+        $this->subject = Mage::helper('core/unserializeArray');
+    }
+
+    /**
+     * @dataProvider provideUnserialize
+     * @group Mage_Core
+     * @group Mage_Core_Helper
+     */
+    public function testUnserialize($expectedTesult, $string): void
+    {
+        try {
+            $this->assertSame($expectedTesult, $this->subject->unserialize($string));
+        } catch (Exception $exception) {
+            $this->assertSame($expectedTesult, $exception->getMessage());
+        }
+    }
+
+    public function provideUnserialize(): Generator
+    {
+        yield 'null' => [
+            'Error unserializing data.',
+            null,
+        ];
+        yield 'empty string' => [
+            'Error unserializing data.',
+            '',
+        ];
+        yield 'random string' => [
+            'unserialize(): Error at offset 0 of 3 bytes',
+            'abc',
+        ];
+        yield 'valid' => [
+            ['key' => 'value'],
+            'a:1:{s:3:"key";s:5:"value";}',
+        ];
+    }
+}