Fix master issues

tests/Unit/ExpenseCategoryTest.php

@@ -0,0 +1,16 @@
+<?php
+
+use Crater\Models\ExpenseCategory;
+use Illuminate\Support\Facades\Artisan;
+
+beforeEach(function () {
+    Artisan::call('db:seed', ['--class' => 'DatabaseSeeder', '--force' => true]);
+    Artisan::call('db:seed', ['--class' => 'DemoSeeder', '--force' => true]);
+});
+
+test('expense category has many expenses', function () {
+    $category = ExpenseCategory::factory()->hasExpenses(5)->create();
+
+    $this->assertCount(5, $category->expenses);
+    $this->assertTrue($category->expenses()->exists());
+});