Add extensive controller and model tests

tests/Feature/ForumControllerTest.php

@@ -0,0 +1,111 @@
+<?php
+
+use App\Models\Forum;
+use App\Models\User;
+use Laravel\Sanctum\Sanctum;
+
+it('can filter forums by parent exists', function (): void {
+    $category = Forum::create([
+        'name' => 'Category 1',
+        'description' => null,
+        'type' => 'category',
+        'parent_id' => null,
+        'position' => 1,
+    ]);
+
+    $forum = Forum::create([
+        'name' => 'Forum A',
+        'description' => null,
+        'type' => 'forum',
+        'parent_id' => $category->id,
+        'position' => 1,
+    ]);
+
+    $response = $this->getJson('/api/forums?parent[exists]=false');
+    $response->assertOk();
+    $response->assertJsonCount(1);
+    $response->assertJsonFragment(['id' => $category->id]);
+
+    $response = $this->getJson('/api/forums?parent[exists]=true');
+    $response->assertOk();
+    $response->assertJsonCount(1);
+    $response->assertJsonFragment(['id' => $forum->id]);
+});
+
+it('rejects forum without category parent', function (): void {
+    Sanctum::actingAs(User::factory()->create());
+
+    $response = $this->postJson('/api/forums', [
+        'name' => 'Bad Forum',
+        'type' => 'forum',
+        'parent' => null,
+    ]);
+
+    $response->assertStatus(422);
+    $response->assertJsonFragment(['message' => 'Forums must belong to a category.']);
+});
+
+it('rejects non-category parent', function (): void {
+    Sanctum::actingAs(User::factory()->create());
+
+    $category = Forum::create([
+        'name' => 'Category',
+        'description' => null,
+        'type' => 'category',
+        'parent_id' => null,
+        'position' => 1,
+    ]);
+
+    $parent = Forum::create([
+        'name' => 'Not Category',
+        'description' => null,
+        'type' => 'forum',
+        'parent_id' => $category->id,
+        'position' => 1,
+    ]);
+
+    $response = $this->postJson('/api/forums', [
+        'name' => 'Child Forum',
+        'type' => 'forum',
+        'parent' => "/api/forums/{$parent->id}",
+    ]);
+
+    $response->assertStatus(422);
+    $response->assertJsonFragment(['message' => 'Parent must be a category.']);
+});
+
+it('reorders positions within parent scope', function (): void {
+    Sanctum::actingAs(User::factory()->create());
+
+    $first = Forum::create([
+        'name' => 'Cat A',
+        'description' => null,
+        'type' => 'category',
+        'parent_id' => null,
+        'position' => 1,
+    ]);
+
+    $second = Forum::create([
+        'name' => 'Cat B',
+        'description' => null,
+        'type' => 'category',
+        'parent_id' => null,
+        'position' => 2,
+    ]);
+
+    $response = $this->postJson('/api/forums/reorder', [
+        'parentId' => null,
+        'orderedIds' => [$second->id, $first->id],
+    ]);
+
+    $response->assertOk();
+
+    $this->assertDatabaseHas('forums', [
+        'id' => $second->id,
+        'position' => 1,
+    ]);
+    $this->assertDatabaseHas('forums', [
+        'id' => $first->id,
+        'position' => 2,
+    ]);
+});