test(auth): add test of admin page access

tests/Core/LoginTest.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Tests\Core;
+
+use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
+
+class LoginTest extends WebTestCase
+{
+    public function testLoginRedirect(): void
+    {
+        $client = static::createClient();
+        $crawler = $client->request('GET', '/admin');
+
+        $this->assertResponseStatusCodeSame(302);
+        $client->followRedirect();
+        $this->assertResponseIsSuccessful();
+    }
+}