Adapt auto-loading to phpcs style and reintroduce TestCase, so we can test custom sniffs when added

Author: simPod

composer.json

@@ -5,12 +5,12 @@
     "license": "MIT",
     "autoload": {
         "psr-4": {
-            "Cdn77\\Sniffs\\": "src/Cdn77/Sniffs"
+            "Cdn77\\": "src/Cdn77"
         }
     },
     "autoload-dev": {
         "psr-4": {
-            "Cdn77\\Sniffs\\Tests\\": "tests/Sniffs"
+            "Cdn77\\": "tests"
         }
     },
     "require": {

tests/TestCase.php

@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Cdn77;
+
+use SlevomatCodingStandard\Sniffs\TestCase as SlevomatTestCase;
+
+use function str_replace;
+use function strlen;
+use function substr;
+
+abstract class TestCase extends SlevomatTestCase
+{
+    protected static function getSniffClassName(): string
+    {
+        return str_replace('\\Tests\\', '\\', substr(static::class, 0, -strlen('Test')));
+    }
+}