replaced mailer library, added email templates (#1462)

tests/Mail/KimaiMailerTest.php

@@ -0,0 +1,51 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Tests\Mail;
+
+use App\Configuration\MailConfiguration;
+use App\Entity\User;
+use App\Mail\KimaiMailer;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Mailer\MailerInterface;
+use Symfony\Component\Mime\Address;
+use Symfony\Component\Mime\Email;
+
+/**
+ * @covers \App\Mail\KimaiMailer
+ */
+class KimaiMailerTest extends TestCase
+{
+    public function getSut(): KimaiMailer
+    {
+        $config = $this->createMock(MailConfiguration::class);
+        $config->expects($this->any())->method('getFromAddress')->willReturn('zippel@example.com');
+
+        $mailer = $this->createMock(MailerInterface::class);
+
+        return new KimaiMailer($config, $mailer);
+    }
+
+    public function testSendSetsFrom()
+    {
+        $user = new User();
+        $user->setUsername('Testing');
+        $user->setEmail('foo@example.com');
+        $user->setAlias('Super User');
+
+        $mailer = $this->getSut();
+        $message = new Email();
+
+        self::assertEquals([], $message->getFrom());
+
+        $mailer->send($message);
+
+        self::assertEquals([new Address('zippel@example.com')], $message->getFrom());
+    }
+}