add more controller

tests/Unit/Services/SchoolIds/SchoolIdAssignmentServiceTest.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace Tests\Unit\Services\SchoolIds;
+
+use App\Models\User;
+use App\Services\SchoolIds\SchoolIdAssignmentService;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class SchoolIdAssignmentServiceTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_assigns_school_id_when_missing(): void
+    {
+        $user = User::factory()->create([
+            'school_id' => null,
+        ]);
+
+        $service = app(SchoolIdAssignmentService::class);
+        $schoolId = $service->assignToUser($user->id);
+
+        $this->assertNotNull($schoolId);
+        $this->assertSame($schoolId, User::query()->findOrFail($user->id)->school_id);
+    }
+
+    public function test_assign_returns_existing_school_id(): void
+    {
+        $user = User::factory()->create([
+            'school_id' => '2500001',
+        ]);
+
+        $service = app(SchoolIdAssignmentService::class);
+        $schoolId = $service->assignToUser($user->id);
+
+        $this->assertSame('2500001', $schoolId);
+    }
+}