Prepared configs for API tests

module/Rest/test-api/Middleware/AuthenticationTest.php

@@ -0,0 +1,21 @@
+<?php
+declare(strict_types=1);
+
+namespace ShlinkioApiTest\Shlink\Rest\Middleware;
+
+use GuzzleHttp\Exception\ClientException;
+use ShlinkioTest\Shlink\Common\ApiTest\ApiTestCase;
+
+class AuthenticationTest extends ApiTestCase
+{
+    /**
+     * @test
+     */
+    public function unauthorizedIsReturnedIfNoAuthenticationIsSent()
+    {
+        $this->expectException(ClientException::class);
+        $this->expectExceptionCode(self::STATUS_UNAUTHORIZED);
+
+        $this->callApi(self::METHOD_GET, '/rest/v1/short-codes');
+    }
+}