[Backport] Cover \Magento\Email\Model\Template\SenderResolver class with Unit test

app/code/Magento/Email/Test/Unit/Model/Template/SenderResolverTest.php

@@ -0,0 +1,112 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Email\Test\Unit\Model\Template;
+
+use Magento\Email\Model\Template\SenderResolver;
+use Magento\Framework\Exception\MailException;
+use Magento\Framework\TestFramework\Unit\Helper\ObjectManager;
+use Magento\Framework\App\Config\ScopeConfigInterface;
+
+/**
+ *  SenderResolverTest
+ */
+class SenderResolverTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @var SenderResolver
+     */
+    private $senderResolver;
+
+    /**
+     * @var ScopeConfigInterface|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $scopeConfig;
+
+    /**
+     * @return void
+     */
+    public function setUp(): void
+    {
+        $objectManager = new ObjectManager($this);
+
+        $this->scopeConfig = $this->createMock(ScopeConfigInterface::class);
+
+        $this->senderResolver = $objectManager->getObject(
+            SenderResolver::class,
+            [
+                'scopeConfig' => $this->scopeConfig
+            ]
+        );
+    }
+
+    /**
+     * Test returned information for given sender's name and email
+     *
+     * @return void
+     */
+    public function testResolve(): void
+    {
+        $sender = 'general';
+        $scopeId = null;
+
+        $this->scopeConfig->expects($this->exactly(2))
+            ->method('getValue')
+            ->willReturnMap([
+               [
+                   'trans_email/ident_' . $sender . '/name',
+                   \Magento\Store\Model\ScopeInterface::SCOPE_STORE,
+                   $scopeId,
+                   'Test Name'
+               ],
+               [
+                   'trans_email/ident_' . $sender . '/email',
+                   \Magento\Store\Model\ScopeInterface::SCOPE_STORE,
+                   $scopeId,
+                   '[email protected]'
+               ]
+            ]);
+
+        $result = $this->senderResolver->resolve($sender);
+
+        $this->assertTrue(isset($result['name']));
+        $this->assertEquals('Test Name', $result['name']);
+
+        $this->assertTrue(isset($result['email']));
+        $this->assertEquals('[email protected]', $result['email']);
+    }
+
+    /**
+     * Test if exception is thrown in case there is no name or email in result
+     *
+     * @dataProvider dataProvidedSenderArray
+     * @param array $sender
+     *
+     * @return void
+     */
+    public function testResolveThrowException(array $sender): void
+    {
+        $this->expectExceptionMessage('Invalid sender data');
+        $this->expectException(MailException::class);
+        $this->senderResolver->resolve($sender);
+    }
+
+    /**
+     * @return array
+     */
+    public function dataProvidedSenderArray()
+    {
+        return [
+            [
+                ['name' => 'Name']
+            ],
+            [
+                ['email' => '[email protected]']
+            ]
+        ];
+    }
+}