adds routing test

tests/Application/RoutingTest.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Application;
+
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+use Tests\Traits\AppTestTrait;
+
+class RoutingTest extends TestCase
+{
+    use AppTestTrait;
+
+    #[Test]
+    public function itLoadsAllRoutes(): void
+    {
+        $routes = $this->app
+            ->getRouteCollector()
+            ->getRoutes();
+
+        $this->assertNotEmpty($routes);
+    }
+
+    #[Test]
+    public function itGracefullyHandlesNotFoundRoutes(): void
+    {
+        $request = $this->createJsonRequest('GET', '/invalid-route');
+        $response = $this->app->handle($request);
+
+        $this->assertEquals(404, $response->getStatusCode());
+    }
+}