Add extensive controller and model tests

tests/Unit/ThreadModelTest.php

@@ -0,0 +1,73 @@
+<?php
+
+use App\Models\Attachment;
+use App\Models\Forum;
+use App\Models\Post;
+use App\Models\Thread;
+use App\Models\User;
+use Illuminate\Support\Carbon;
+
+it('casts solved flag and exposes relationships', function (): void {
+    $category = Forum::create([
+        'name' => 'Category',
+        'description' => null,
+        'type' => 'category',
+        'parent_id' => null,
+        'position' => 1,
+    ]);
+
+    $forum = Forum::create([
+        'name' => 'Forum',
+        'description' => null,
+        'type' => 'forum',
+        'parent_id' => $category->id,
+        'position' => 1,
+    ]);
+
+    $user = User::factory()->create();
+
+    $thread = Thread::create([
+        'forum_id' => $forum->id,
+        'user_id' => $user->id,
+        'title' => 'Thread',
+        'body' => 'Body',
+        'solved' => 1,
+    ]);
+
+    $oldPost = Post::create([
+        'thread_id' => $thread->id,
+        'user_id' => $user->id,
+        'body' => 'Old post',
+        'created_at' => Carbon::now()->subDay(),
+    ]);
+
+    $newPost = Post::create([
+        'thread_id' => $thread->id,
+        'user_id' => $user->id,
+        'body' => 'New post',
+        'created_at' => Carbon::now(),
+    ]);
+
+    $attachment = 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' => 10,
+    ]);
+
+    $thread->load(['forum', 'user', 'posts', 'attachments', 'latestPost']);
+
+    expect($thread->solved)->toBeTrue();
+    expect($thread->forum->id)->toBe($forum->id);
+    expect($thread->user->id)->toBe($user->id);
+    expect($thread->posts)->toHaveCount(2);
+    expect($thread->attachments->first()->id)->toBe($attachment->id);
+    expect($thread->latestPost->id)->toBe($newPost->id);
+});