Add extensive controller and model tests

tests/Unit/ForumModelTest.php

@@ -0,0 +1,74 @@
+<?php
+
+use App\Models\Forum;
+use App\Models\Post;
+use App\Models\Thread;
+use App\Models\User;
+use Illuminate\Support\Carbon;
+
+it('exposes forum relationships and latest helpers', 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' => 2,
+    ]);
+
+    $child = Forum::create([
+        'name' => 'Child',
+        'description' => null,
+        'type' => 'forum',
+        'parent_id' => $forum->id,
+        'position' => 1,
+    ]);
+
+    $user = User::factory()->create();
+
+    $threadOld = Thread::create([
+        'forum_id' => $forum->id,
+        'user_id' => $user->id,
+        'title' => 'Old Thread',
+        'body' => 'Old',
+        'created_at' => Carbon::now()->subDays(2),
+    ]);
+
+    $threadNew = Thread::create([
+        'forum_id' => $forum->id,
+        'user_id' => $user->id,
+        'title' => 'New Thread',
+        'body' => 'New',
+        'created_at' => Carbon::now()->subDay(),
+    ]);
+
+    $postOld = Post::create([
+        'thread_id' => $threadOld->id,
+        'user_id' => $user->id,
+        'body' => 'Old post',
+        'created_at' => Carbon::now()->subDays(2),
+    ]);
+
+    $postNew = Post::create([
+        'thread_id' => $threadNew->id,
+        'user_id' => $user->id,
+        'body' => 'New post',
+        'created_at' => Carbon::now()->subDay(),
+    ]);
+
+    $forum->load(['parent', 'children', 'threads', 'posts', 'latestThread', 'latestPost']);
+
+    expect($forum->parent?->id)->toBe($category->id);
+    expect($forum->children->first()->id)->toBe($child->id);
+    expect($forum->threads)->toHaveCount(2);
+    expect($forum->posts)->toHaveCount(2);
+    expect($forum->latestThread?->id)->toBe($threadNew->id);
+    expect($forum->latestPost?->id)->toBe($postNew->id);
+});