Add extensive controller and model tests

tests/Feature/StatsControllerTest.php

@@ -0,0 +1,85 @@
+<?php
+
+use App\Models\Attachment;
+use App\Models\Forum;
+use App\Models\Post;
+use App\Models\Thread;
+use App\Models\User;
+use Illuminate\Support\Facades\Storage;
+
+it('returns forum statistics summary', function (): void {
+    Storage::fake('public');
+
+    $user = User::factory()->create();
+    $forum = Forum::create([
+        'name' => 'Category',
+        'description' => null,
+        'type' => 'category',
+        'parent_id' => null,
+        'position' => 1,
+    ]);
+    $child = Forum::create([
+        'name' => 'Forum',
+        'description' => null,
+        'type' => 'forum',
+        'parent_id' => $forum->id,
+        'position' => 1,
+    ]);
+
+    $thread = Thread::create([
+        'forum_id' => $child->id,
+        'user_id' => $user->id,
+        'title' => 'Thread',
+        'body' => 'Body',
+    ]);
+
+    Post::create([
+        'thread_id' => $thread->id,
+        'user_id' => $user->id,
+        'body' => 'Post',
+    ]);
+
+    Attachment::create([
+        'thread_id' => $thread->id,
+        'post_id' => null,
+        'attachment_extension_id' => null,
+        'attachment_group_id' => null,
+        'user_id' => $user->id,
+        'disk' => 'local',
+        'path' => 'attachments/threads/'.$thread->id.'/file.pdf',
+        'original_name' => 'file.pdf',
+        'extension' => 'pdf',
+        'mime_type' => 'application/pdf',
+        'size_bytes' => 123,
+    ]);
+
+    $response = $this->getJson('/api/stats');
+
+    $response->assertOk();
+    $response->assertJsonStructure([
+        'threads',
+        'posts',
+        'users',
+        'attachments',
+        'board_started_at',
+        'attachments_size_bytes',
+        'avatar_directory_size_bytes',
+        'database_size_bytes',
+        'database_server',
+        'gzip_compression',
+        'php_version',
+        'orphan_attachments',
+        'board_version',
+        'posts_per_day',
+        'topics_per_day',
+        'users_per_day',
+        'attachments_per_day',
+    ]);
+
+    $response->assertJsonFragment([
+        'threads' => 1,
+        'users' => 1,
+        'attachments' => 1,
+        'attachments_size_bytes' => 123,
+    ]);
+});