first commit

tests/Shared/HelperEdgeCasesTest.php

@@ -0,0 +1,24 @@
+<?php
+declare(strict_types=1);
+
+namespace Tests\Shared;
+
+use App\Shared\Http\ClientIpResolver;
+use PHPUnit\Framework\TestCase;
+use Slim\Psr7\Factory\ServerRequestFactory;
+
+final class HelperEdgeCasesTest extends TestCase
+{
+    public function testClientIpResolverFallsBackToRemoteAddr(): void
+    {
+        $resolver = new ClientIpResolver([]);
+
+        $request = new ServerRequestFactory()->createServerRequest(
+            'GET',
+            '/',
+            ['REMOTE_ADDR' => '127.0.0.1']
+        );
+
+        self::assertSame('127.0.0.1', $resolver->resolve($request));
+    }
+}