Fix master issues

tests/Unit/PaymentTest.php

@@ -0,0 +1,27 @@
+<?php
+
+use Crater\Models\Payment;
+use Illuminate\Support\Facades\Artisan;
+
+beforeEach(function () {
+    Artisan::call('db:seed', ['--class' => 'DatabaseSeeder', '--force' => true]);
+    Artisan::call('db:seed', ['--class' => 'DemoSeeder', '--force' => true]);
+});
+
+test('payment belongs to invoice', function () {
+    $payment = Payment::factory()->forInvoice()->create();
+
+    $this->assertTrue($payment->invoice()->exists());
+});
+
+test('payment belongs to customer', function () {
+    $payment = Payment::factory()->forCustomer()->create();
+
+    $this->assertTrue($payment->customer()->exists());
+});
+
+test('payment belongs to payment method', function () {
+    $payment = Payment::factory()->forPaymentMethod()->create();
+
+    $this->assertTrue($payment->paymentMethod()->exists());
+});