Fix master issues

tests/Unit/InvoiceItemTest.php

@@ -0,0 +1,37 @@
+<?php
+
+use Crater\Models\Invoice;
+use Crater\Models\InvoiceItem;
+use Crater\Models\Item;
+use Illuminate\Support\Facades\Artisan;
+
+beforeEach(function () {
+    Artisan::call('db:seed', ['--class' => 'DatabaseSeeder', '--force' => true]);
+    Artisan::call('db:seed', ['--class' => 'DemoSeeder', '--force' => true]);
+});
+
+test('invoice item belongs to invoice', function () {
+    $invoiceItem = InvoiceItem::factory()->forInvoice()->create();
+
+    $this->assertTrue($invoiceItem->invoice()->exists());
+});
+
+test('invoice item belongs to item', function () {
+    $invoiceItem = InvoiceItem::factory()->create([
+        'item_id' => Item::factory(),
+        'invoice_id' => Invoice::factory(),
+    ]);
+
+    $this->assertTrue($invoiceItem->item()->exists());
+});
+
+
+test('invoice item has many taxes', function () {
+    $invoiceItem = InvoiceItem::factory()->hasTaxes(5)->create([
+        'invoice_id' => Invoice::factory(),
+    ]);
+
+    $this->assertCount(5, $invoiceItem->taxes);
+
+    $this->assertTrue($invoiceItem->taxes()->exists());
+});