update tests

tests/Feature/Api/V1/System/StatsControllerTest.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace Tests\Feature\Api\V1\System;
+
+use App\Models\Stats;
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Laravel\Sanctum\Sanctum;
+use Tests\TestCase;
+
+class StatsControllerTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_stats_require_authentication(): void
+    {
+        $this->getJson('/api/v1/stats')
+            ->assertStatus(401);
+    }
+
+    public function test_stats_index_returns_rows_for_authenticated_user(): void
+    {
+        Stats::query()->create([
+            'students' => 12,
+            'teachers' => 3,
+            'admins' => 2,
+            'users' => 17,
+        ]);
+
+        Sanctum::actingAs(User::factory()->create());
+
+        $response = $this->getJson('/api/v1/stats');
+
+        $response->assertOk()
+            ->assertJsonPath('status', true)
+            ->assertJsonStructure(['status', 'message', 'data']);
+
+        $this->assertSame(12, $response->json('data.0.students'));
+    }
+
+    public function test_stats_index_returns_empty_array_when_no_stats(): void
+    {
+        Sanctum::actingAs(User::factory()->create());
+
+        $this->getJson('/api/v1/stats')
+            ->assertOk()
+            ->assertJsonPath('status', true)
+            ->assertJsonPath('data', []);
+    }
+}