Start writing unit tests

tests/AppKernel.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pcm\IconBundle\Tests;
+
+use Pcm\IconBundle\PcmIconBundle;
+use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
+use Symfony\Component\Config\Loader\LoaderInterface;
+use Symfony\Component\HttpKernel\Kernel;
+
+class AppKernel extends Kernel
+{
+    /**
+     * @return array
+     */
+    public function registerBundles(): array
+    {
+        return [
+            new FrameworkBundle(),
+            new PcmIconBundle()
+        ];
+    }
+
+    /**
+     * @param LoaderInterface $loader
+     */
+    public function registerContainerConfiguration(LoaderInterface $loader): void
+    {
+        $loader->load(__DIR__.'/services_'.$this->getEnvironment().'.yml');
+    }
+}