functionality for setting default folders for app installation

tests/Feature/SetupServiceTest.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Services\SetupService;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Foundation\Testing\WithFaker;
+use Storage;
+use Tests\TestCase;
+
+class SetupServiceTest extends TestCase
+{
+
+    public function __construct()
+    {
+        parent::__construct();
+        $this->setup = app()->make(SetupService::class);
+    }
+
+    /**
+     * @test
+     */
+    public function it_create_system_folders()
+    {
+        $this->setup->create_directories();
+
+        collect(['avatars', 'chunks', 'system', 'files', 'temp', 'zip'])
+            ->each(function ($directory) {
+                Storage::disk('local')->assertExists($directory);
+            });
+    }
+}