diff --git a/app/Services/Manage/OrderService.php b/app/Services/Manage/OrderService.php
index f09319d..2969ee7 100644
--- a/app/Services/Manage/OrderService.php
+++ b/app/Services/Manage/OrderService.php
@@ -13,6 +13,7 @@
 use App\Models\Product;
 use App\Models\ProductVariant;
 use App\Models\User;
+use App\Services\Concerns\RunsInTransaction;
 use App\Services\Finance\CashService;
 use App\Services\Media\MediaService;
 use App\Services\System\PushNotificationService;
@@ -23,11 +24,12 @@
 use Illuminate\Database\Eloquent\Collection as EloquentCollection;
 use Illuminate\Support\Collection;
 use Illuminate\Support\Facades\DB;
-use Illuminate\Support\Facades\Log;
 use Illuminate\Validation\ValidationException;
 
 class OrderService
 {
+    use RunsInTransaction;
+
     private const MAX_PHOTOS = 1;
 
     public function __construct(
@@ -388,16 +390,16 @@ public function resyncDraftPrices(User $user, string $priceTypeValue): array
 
     public function create(array $validated, User $user): Order
     {
-        try {
-            // Force cashier settings
-            if ($user->hasRole('cashier')) {
-                $validated['channel'] = 'store';
-                $validated['price_type'] = 'retail';
-                $validated['payment_type'] = 'cash';
-                unset($validated['customer_id']);
-            }
+        // Force cashier settings
+        if ($user->hasRole('cashier')) {
+            $validated['channel'] = 'store';
+            $validated['price_type'] = 'retail';
+            $validated['payment_type'] = 'cash';
+            unset($validated['customer_id']);
+        }
 
-            $order = DB::transaction(function () use ($validated, $user): Order {
+        $order = $this->runInTransaction(
+            function () use ($validated, $user): Order {
                 $priceType = $this->resolvePriceType($validated['channel'], $validated['price_type']);
 
                 $draftItems = $this->draftItemsQuery($user)
@@ -482,18 +484,9 @@ public function create(array $validated, User $user): Order
                 }
 
                 return $order;
-            });
-        } catch (ValidationException $e) {
-            throw $e;
-        } catch (\Throwable $e) {
-            Log::error('Gagal membuat pesanan: '.$e->getMessage(), [
-                'trace' => $e->getTraceAsString(),
-            ]);
-
-            throw ValidationException::withMessages([
-                'system' => 'Terjadi kesalahan pada server. Silakan laporkan masalah ini ke pihak terkait.',
-            ]);
-        }
+            },
+            'Gagal membuat pesanan',
+        );
 
         $this->pushNotificationService->sendToRoles(
             '📦 Pesanan Baru',
@@ -509,8 +502,8 @@ public function update(Order $order, array $validated): void
     {
         $order->ensureEditable();
 
-        try {
-            DB::transaction(function () use ($order, $validated): void {
+        $this->runInTransaction(
+            function () use ($order, $validated): void {
                 $order->load('items');
 
                 foreach ($order->items as $item) {
@@ -580,18 +573,9 @@ public function update(Order $order, array $validated): void
                     $orderItem = $order->items()->create($itemData);
                     $this->decrementStock($orderItem);
                 }
-            });
-        } catch (ValidationException $e) {
-            throw $e;
-        } catch (\Throwable $e) {
-            Log::error('Gagal memperbarui pesanan: '.$e->getMessage(), [
-                'trace' => $e->getTraceAsString(),
-            ]);
-
-            throw ValidationException::withMessages([
-                'system' => 'Terjadi kesalahan pada server. Silakan laporkan masalah ini ke pihak terkait.',
-            ]);
-        }
+            },
+            'Gagal memperbarui pesanan',
+        );
 
         $this->pushNotificationService->sendToRoles(
             '✏️ Pesanan Diperbarui',
@@ -606,8 +590,8 @@ public function delete(Order $order): void
         $orderNumber = $order->order_number;
         $totalAmount = $order->total_amount;
 
-        try {
-            DB::transaction(function () use ($order): void {
+        $this->runInTransaction(
+            function () use ($order): void {
                 $order->load('items');
 
                 if ($order->status->isEditable()) {
@@ -622,18 +606,9 @@ public function delete(Order $order): void
 
                 $order->items()->delete();
                 $order->delete();
-            });
-        } catch (ValidationException $e) {
-            throw $e;
-        } catch (\Throwable $e) {
-            Log::error('Gagal menghapus pesanan: '.$e->getMessage(), [
-                'trace' => $e->getTraceAsString(),
-            ]);
-
-            throw ValidationException::withMessages([
-                'system' => 'Terjadi kesalahan pada server. Silakan laporkan masalah ini ke pihak terkait.',
-            ]);
-        }
+            },
+            'Gagal menghapus pesanan',
+        );
 
         $this->pushNotificationService->sendToRoles(
             '🗑️ Pesanan Dihapus',
@@ -651,8 +626,8 @@ public function transitionStatus(Order $order, OrderStatus $status): void
             ]);
         }
 
-        try {
-            DB::transaction(function () use ($order, $status): void {
+        $this->runInTransaction(
+            function () use ($order, $status): void {
                 if ($status === OrderStatus::CANCELLED) {
                     $order->load('items');
 
@@ -668,18 +643,9 @@ public function transitionStatus(Order $order, OrderStatus $status): void
 
                 $order->status = $status;
                 $order->save();
-            });
-        } catch (ValidationException $e) {
-            throw $e;
-        } catch (\Throwable $e) {
-            Log::error('Gagal mengubah status pesanan: '.$e->getMessage(), [
-                'trace' => $e->getTraceAsString(),
-            ]);
-
-            throw ValidationException::withMessages([
-                'system' => 'Terjadi kesalahan pada server. Silakan laporkan masalah ini ke pihak terkait.',
-            ]);
-        }
+            },
+            'Gagal mengubah status pesanan',
+        );
 
         $this->pushNotificationService->sendToRoles(
             '📦 Status Pesanan Diubah',
diff --git a/tests/Feature/Admin/Manage/OrderTest.php b/tests/Feature/Admin/Manage/OrderTest.php
new file mode 100644
index 0000000..658b089
--- /dev/null
+++ b/tests/Feature/Admin/Manage/OrderTest.php
@@ -0,0 +1,585 @@
+<?php
+
+use App\Enums\OrderChannel;
+use App\Enums\OrderStatus;
+use App\Enums\PaymentType;
+use App\Enums\Permission as PermissionEnum;
+use App\Enums\PriceType;
+use App\Models\Customer;
+use App\Models\Order;
+use App\Models\OrderItem;
+use App\Models\Product;
+use App\Models\ProductPrice;
+use App\Models\ProductVariant;
+use App\Models\User;
+use Database\Seeders\CashAccountSeeder;
+use Database\Seeders\RolePermissionSeeder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\Storage;
+
+uses(RefreshDatabase::class);
+
+beforeEach(function () {
+    $this->seed(RolePermissionSeeder::class);
+    User::factory()->create();
+    $this->seed(CashAccountSeeder::class);
+    Storage::fake('public');
+});
+
+// ─── Helper ───────────────────────────────────────────────
+
+function createOrderUserWithPermission(PermissionEnum ...$permissions): User
+{
+    $user = User::factory()->create();
+
+    $user->givePermissionTo(
+        array_merge(
+            [PermissionEnum::DASHBOARD_VIEW->value],
+            array_map(fn (PermissionEnum $p) => $p->value, $permissions)
+        )
+    );
+
+    $user->forgetCachedPermissions();
+
+    return $user;
+}
+
+function createOrderWithItems(?User $user = null): Order
+{
+    $user ??= User::factory()->create();
+
+    $order = Order::factory()->create([
+        'created_by_id' => $user->id,
+        'channel' => OrderChannel::STORE->value,
+        'price_type' => PriceType::RETAIL->value,
+        'payment_type' => PaymentType::CASH->value,
+    ]);
+
+    $product = Product::factory()->create();
+    $variant = ProductVariant::factory()->create([
+        'product_id' => $product->id,
+        'stock' => 100,
+    ]);
+
+    OrderItem::factory()->create([
+        'order_id' => $order->id,
+        'product_variant_id' => $variant->id,
+        'quantity' => 5,
+        'unit_price' => 50000,
+        'subtotal' => 250000,
+    ]);
+
+    return $order;
+}
+
+function setupOrderDraftItems(User $user): ProductVariant
+{
+    $product = Product::factory()->create();
+    $variant = ProductVariant::factory()->create([
+        'product_id' => $product->id,
+        'stock' => 100,
+    ]);
+
+    // Create product price so CuttingResultPriceResolver can resolve it
+    ProductPrice::factory()->create([
+        'variant_id' => $variant->id,
+        'type' => PriceType::RETAIL,
+        'price' => 50000,
+    ]);
+
+    // Create draft item via API
+    test()->actingAs($user)
+        ->postJson(route('admin.manage.orders.draft_items.store'), [
+            'product_variant_id' => $variant->id,
+            'price_type' => PriceType::RETAIL->value,
+            'stock_quality' => 'good',
+            'quantity' => 5,
+        ])
+        ->assertOk();
+
+    return $variant;
+}
+
+// ─── Index ────────────────────────────────────────────────
+
+describe('Order Index', function () {
+    test('authenticated user with permission can view order index', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW);
+
+        $this->actingAs($user)
+            ->get(route('admin.manage.orders.index'))
+            ->assertOk();
+    });
+
+    test('guest is redirected to login', function () {
+        $this->get(route('admin.manage.orders.index'))
+            ->assertRedirect(route('login'));
+    });
+
+    test('user without permission is forbidden', function () {
+        $user = User::factory()->create();
+
+        $this->actingAs($user)
+            ->get(route('admin.manage.orders.index'))
+            ->assertForbidden();
+    });
+
+    test('index displays orders', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW);
+
+        createOrderWithItems($user);
+        createOrderWithItems($user);
+
+        $this->actingAs($user)
+            ->get(route('admin.manage.orders.index'))
+            ->assertOk();
+    });
+
+    test('index can search orders by order number', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW);
+
+        $order = Order::factory()->create([
+            'created_by_id' => $user->id,
+            'order_number' => 'ORD-20260704-TEST',
+        ]);
+
+        $this->actingAs($user)
+            ->get(route('admin.manage.orders.index', ['search' => 'TEST']))
+            ->assertOk();
+    });
+});
+
+// ─── Create ───────────────────────────────────────────────
+
+describe('Order Create', function () {
+    test('authenticated user with permission can view create form', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW, PermissionEnum::ORDERS_CREATE);
+
+        $this->actingAs($user)
+            ->get(route('admin.manage.orders.create'))
+            ->assertOk();
+    });
+
+    test('guest is redirected to login', function () {
+        $this->get(route('admin.manage.orders.create'))
+            ->assertRedirect(route('login'));
+    });
+
+    test('user without create permission is forbidden', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW);
+
+        $this->actingAs($user)
+            ->get(route('admin.manage.orders.create'))
+            ->assertForbidden();
+    });
+});
+
+// ─── Store ────────────────────────────────────────────────
+
+describe('Order Store', function () {
+    test('authenticated user with permission can create an order', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW, PermissionEnum::ORDERS_CREATE);
+
+        $customer = Customer::factory()->create();
+        setupOrderDraftItems($user);
+
+        $this->actingAs($user)
+            ->post(route('admin.manage.orders.store'), [
+                'customer_id' => $customer->id,
+                'channel' => OrderChannel::STORE->value,
+                'price_type' => PriceType::RETAIL->value,
+                'payment_type' => PaymentType::CASH->value,
+                'discount' => 0,
+            ])
+            ->assertRedirect(route('admin.manage.orders.index'));
+
+        $order = Order::query()->latest()->first();
+        expect($order)->not->toBeNull();
+        expect($order->status)->toBe(OrderStatus::PENDING);
+        expect($order->items)->toHaveCount(1);
+    });
+
+    test('guest cannot create an order', function () {
+        $this->post(route('admin.manage.orders.store'), [
+            'channel' => OrderChannel::STORE->value,
+            'price_type' => PriceType::RETAIL->value,
+            'payment_type' => PaymentType::CASH->value,
+        ])->assertRedirect(route('login'));
+    });
+
+    test('user without create permission is forbidden', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW);
+
+        $this->actingAs($user)
+            ->post(route('admin.manage.orders.store'), [
+                'channel' => OrderChannel::STORE->value,
+                'price_type' => PriceType::RETAIL->value,
+                'payment_type' => PaymentType::CASH->value,
+            ])
+            ->assertForbidden();
+    });
+
+    test('store fails without draft items', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW, PermissionEnum::ORDERS_CREATE);
+
+        $this->actingAs($user)
+            ->post(route('admin.manage.orders.store'), [
+                'channel' => OrderChannel::STORE->value,
+                'price_type' => PriceType::RETAIL->value,
+                'payment_type' => PaymentType::CASH->value,
+                'discount' => 0,
+            ])
+            ->assertSessionHasErrors('items');
+    });
+
+    test('creating order decrements stock', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW, PermissionEnum::ORDERS_CREATE);
+
+        $variant = setupOrderDraftItems($user);
+        $initialStock = $variant->stock;
+
+        $this->actingAs($user)
+            ->post(route('admin.manage.orders.store'), [
+                'channel' => OrderChannel::STORE->value,
+                'price_type' => PriceType::RETAIL->value,
+                'payment_type' => PaymentType::CASH->value,
+                'discount' => 0,
+            ]);
+
+        expect($variant->fresh()->stock)->toBe($initialStock - 5);
+    });
+});
+
+// ─── Show ─────────────────────────────────────────────────
+
+describe('Order Show', function () {
+    test('authenticated user with permission can view order details', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW);
+
+        $order = createOrderWithItems($user);
+
+        $this->actingAs($user)
+            ->get(route('admin.manage.orders.show', $order))
+            ->assertOk();
+    });
+
+    test('guest is redirected to login', function () {
+        $order = createOrderWithItems();
+
+        $this->get(route('admin.manage.orders.show', $order))
+            ->assertRedirect(route('login'));
+    });
+});
+
+// ─── Edit ─────────────────────────────────────────────────
+
+describe('Order Edit', function () {
+    test('authenticated user with permission can view edit form', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW, PermissionEnum::ORDERS_UPDATE);
+
+        $order = createOrderWithItems($user);
+
+        $this->actingAs($user)
+            ->get(route('admin.manage.orders.edit', $order))
+            ->assertOk();
+    });
+
+    test('guest is redirected to login', function () {
+        $order = createOrderWithItems();
+
+        $this->get(route('admin.manage.orders.edit', $order))
+            ->assertRedirect(route('login'));
+    });
+
+    test('user without update permission is forbidden', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW);
+
+        $order = createOrderWithItems($user);
+
+        $this->actingAs($user)
+            ->get(route('admin.manage.orders.edit', $order))
+            ->assertForbidden();
+    });
+
+    test('completed order cannot be edited', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW, PermissionEnum::ORDERS_UPDATE);
+
+        $order = Order::factory()->completed()->create(['created_by_id' => $user->id]);
+
+        $this->actingAs($user)
+            ->get(route('admin.manage.orders.edit', $order))
+            ->assertRedirect(route('admin.manage.orders.index'));
+    });
+});
+
+// ─── Destroy ──────────────────────────────────────────────
+
+describe('Order Destroy', function () {
+    test('authenticated user with permission can delete an order', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW, PermissionEnum::ORDERS_DELETE);
+
+        $order = createOrderWithItems($user);
+
+        $this->actingAs($user)
+            ->delete(route('admin.manage.orders.destroy', $order))
+            ->assertRedirect(route('admin.manage.orders.index'));
+
+        $this->assertSoftDeleted('orders', ['id' => $order->id]);
+    });
+
+    test('guest cannot delete an order', function () {
+        $order = createOrderWithItems();
+
+        $this->delete(route('admin.manage.orders.destroy', $order))
+            ->assertRedirect(route('login'));
+
+        $this->assertNotSoftDeleted('orders', ['id' => $order->id]);
+    });
+
+    test('user without delete permission is forbidden', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW);
+
+        $order = createOrderWithItems($user);
+
+        $this->actingAs($user)
+            ->delete(route('admin.manage.orders.destroy', $order))
+            ->assertForbidden();
+
+        $this->assertNotSoftDeleted('orders', ['id' => $order->id]);
+    });
+
+    test('deleting order increments stock back', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW, PermissionEnum::ORDERS_DELETE);
+
+        $order = createOrderWithItems($user);
+        $item = $order->items->first();
+        $variant = $item->productVariant;
+        $stockBeforeDelete = $variant->fresh()->stock;
+
+        $this->actingAs($user)
+            ->delete(route('admin.manage.orders.destroy', $order));
+
+        expect($variant->fresh()->stock)->toBe($stockBeforeDelete + $item->quantity);
+    });
+});
+
+// ─── Status Transition ────────────────────────────────────
+
+describe('Order Status Transition', function () {
+    test('authenticated user can send an order', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW, PermissionEnum::ORDERS_SEND);
+
+        $order = Order::factory()->create([
+            'created_by_id' => $user->id,
+            'status' => OrderStatus::PENDING->value,
+        ]);
+
+        $this->actingAs($user)
+            ->post(route('admin.manage.orders.transition_status', $order), [
+                'status' => OrderStatus::PROCESSING->value,
+            ])
+            ->assertRedirect(route('admin.manage.orders.index'));
+
+        expect($order->fresh()->status)->toBe(OrderStatus::PROCESSING);
+    });
+
+    test('authenticated user can complete an order', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW, PermissionEnum::ORDERS_COMPLETE);
+
+        $order = Order::factory()->create([
+            'created_by_id' => $user->id,
+            'status' => OrderStatus::PROCESSING->value,
+        ]);
+
+        $this->actingAs($user)
+            ->post(route('admin.manage.orders.transition_status', $order), [
+                'status' => OrderStatus::COMPLETED->value,
+            ]);
+
+        expect($order->fresh()->status)->toBe(OrderStatus::COMPLETED);
+    });
+
+    test('authenticated user can cancel an order', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW, PermissionEnum::ORDERS_CANCEL);
+
+        $order = Order::factory()->create([
+            'created_by_id' => $user->id,
+            'status' => OrderStatus::PENDING->value,
+        ]);
+
+        $this->actingAs($user)
+            ->post(route('admin.manage.orders.transition_status', $order), [
+                'status' => OrderStatus::CANCELLED->value,
+            ]);
+
+        expect($order->fresh()->status)->toBe(OrderStatus::CANCELLED);
+    });
+
+    test('guest cannot transition status', function () {
+        $order = Order::factory()->create(['status' => OrderStatus::PENDING->value]);
+
+        $this->post(route('admin.manage.orders.transition_status', $order), [
+            'status' => OrderStatus::PROCESSING->value,
+        ])->assertRedirect(route('login'));
+    });
+
+    test('invalid status transition is rejected', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW, PermissionEnum::ORDERS_COMPLETE);
+
+        $order = Order::factory()->create([
+            'created_by_id' => $user->id,
+            'status' => OrderStatus::PENDING->value,
+        ]);
+
+        // PENDING cannot go directly to COMPLETED
+        $this->actingAs($user)
+            ->post(route('admin.manage.orders.transition_status', $order), [
+                'status' => OrderStatus::COMPLETED->value,
+            ])
+            ->assertSessionHasErrors('status');
+    });
+
+    test('cancelling order increments stock back', function () {
+        $user = createOrderUserWithPermission(PermissionEnum::ORDERS_VIEW, PermissionEnum::ORDERS_CANCEL);
+
+        $order = createOrderWithItems($user);
+        $item = $order->items->first();
+        $variant = $item->productVariant;
+        $stockBeforeCancel = $variant->fresh()->stock;
+
+        $this->actingAs($user)
+            ->post(route('admin.manage.orders.transition_status', $order), [
+                'status' => OrderStatus::CANCELLED->value,
+            ]);
+
+        expect($variant->fresh()->stock)->toBe($stockBeforeCancel + $item->quantity);
+    });
+});
+
+// ─── Order Model ──────────────────────────────────────────
+
+describe('Order Model', function () {
+    test('order uses soft deletes', function () {
+        $order = Order::factory()->create();
+
+        $order->delete();
+
+        expect($order->trashed())->toBeTrue();
+    });
+
+    test('order has amounts cast to integer', function () {
+        $order = Order::factory()->create([
+            'subtotal' => 100000,
+            'discount' => 5000,
+            'total_amount' => 95000,
+        ]);
+
+        expect($order->subtotal)->toBeInt();
+        expect($order->discount)->toBeInt();
+        expect($order->total_amount)->toBeInt();
+    });
+
+    test('order has formatted amount accessors', function () {
+        $order = Order::factory()->create([
+            'subtotal' => 100000,
+            'discount' => 5000,
+            'total_amount' => 95000,
+        ]);
+
+        expect($order->subtotal_formatted)->toBe('Rp 100.000');
+        expect($order->discount_formatted)->toBe('Rp 5.000');
+        expect($order->total_amount_formatted)->toBe('Rp 95.000');
+    });
+
+    test('order has status cast to enum', function () {
+        $order = Order::factory()->create(['status' => OrderStatus::PENDING->value]);
+
+        expect($order->status)->toBe(OrderStatus::PENDING);
+    });
+
+    test('order has status label accessor', function () {
+        $order = Order::factory()->create(['status' => OrderStatus::PENDING->value]);
+
+        expect($order->status_label)->toBe('Menunggu');
+    });
+
+    test('order belongs to customer', function () {
+        $customer = Customer::factory()->create();
+        $order = Order::factory()->create(['customer_id' => $customer->id]);
+
+        expect($order->customer)->not->toBeNull();
+        expect($order->customer->id)->toBe($customer->id);
+    });
+
+    test('order belongs to created by user', function () {
+        $user = User::factory()->create();
+        $order = Order::factory()->create(['created_by_id' => $user->id]);
+
+        expect($order->createdBy)->not->toBeNull();
+        expect($order->createdBy->id)->toBe($user->id);
+    });
+
+    test('order can have items', function () {
+        $order = Order::factory()->create();
+        OrderItem::factory()->count(3)->create(['order_id' => $order->id]);
+
+        expect($order->fresh()->items)->toHaveCount(3);
+    });
+
+    test('order status is editable for pending and processing', function () {
+        $pending = Order::factory()->create(['status' => OrderStatus::PENDING->value]);
+        $processing = Order::factory()->create(['status' => OrderStatus::PROCESSING->value]);
+
+        expect($pending->status->isEditable())->toBeTrue();
+        expect($processing->status->isEditable())->toBeTrue();
+    });
+});
+
+// ─── OrderItem Model ──────────────────────────────────────
+
+describe('OrderItem Model', function () {
+    test('order item has amounts cast to integer', function () {
+        $order = Order::factory()->create();
+        $item = OrderItem::factory()->create([
+            'order_id' => $order->id,
+            'quantity' => 10,
+            'unit_price' => 50000,
+            'subtotal' => 500000,
+        ]);
+
+        expect($item->quantity)->toBeInt();
+        expect($item->unit_price)->toBeInt();
+        expect($item->subtotal)->toBeInt();
+    });
+
+    test('order item has formatted amount accessors', function () {
+        $order = Order::factory()->create();
+        $item = OrderItem::factory()->create([
+            'order_id' => $order->id,
+            'quantity' => 10,
+            'unit_price' => 50000,
+            'subtotal' => 500000,
+        ]);
+
+        expect($item->quantity_formatted)->toBe('10 pcs');
+        expect($item->unit_price_formatted)->toBe('Rp 50.000');
+        expect($item->subtotal_formatted)->toBe('Rp 500.000');
+    });
+
+    test('order item belongs to order', function () {
+        $order = Order::factory()->create();
+        $item = OrderItem::factory()->create(['order_id' => $order->id]);
+
+        expect($item->order)->not->toBeNull();
+        expect($item->order->id)->toBe($order->id);
+    });
+
+    test('order item uses soft deletes', function () {
+        $order = Order::factory()->create();
+        $item = OrderItem::factory()->create(['order_id' => $order->id]);
+
+        $item->delete();
+
+        expect($item->trashed())->toBeTrue();
+    });
+});