Covering the Backend Decoding Helper by UnitTest

Author: eduard13

app/code/Magento/Backend/Test/Unit/Helper/JsTest.php

@@ -0,0 +1,81 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Backend\Test\Unit\Helper;
+
+use Magento\Backend\Helper\Js;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Class JsTest
+ */
+class JsTest extends TestCase
+{
+    /**
+     * @var Js
+     */
+    private $helper;
+
+    /**
+     * Set Up
+     */
+    protected function setUp()
+    {
+        $this->helper = new Js();
+    }
+
+    /**
+     * Test decoding the serialized input
+     *
+     * @dataProvider getEncodedDataProvider
+     *
+     * @param string $encoded
+     * @param array $expected
+     */
+    public function testDecodeGridSerializedInput(string $encoded, array $expected)
+    {
+        $this->assertEquals($expected, $this->helper->decodeGridSerializedInput($encoded));
+    }
+
+    /**
+     * Get serialized grid input
+     *
+     * @return array
+     */
+    public function getEncodedDataProvider(): array
+    {
+        return [
+            'Decoding empty serialized string' => [
+                '',
+                []
+            ],
+            'Decoding a simplified serialized string' => [
+                '1&2&3&4',
+                [1, 2, 3, 4]
+            ],
+            'Decoding encoded serialized string' => [
+                '2=dGVzdC1zdHJpbmc=',
+                [
+                    2 => [
+                        'test-string' => ''
+                    ]
+                ]
+            ],
+            'Decoding multiple encoded serialized strings' => [
+                '2=dGVzdC1zdHJpbmc=&3=bmV3LXN0cmluZw==',
+                [
+                    2 => [
+                        'test-string' => ''
+                    ],
+                    3 => [
+                        'new-string' => ''
+                    ]
+                ]
+            ]
+        ];
+    }
+}