snipe-it/tests/unit/ConsumableTest.php

<?php
namespace Tests\Unit;

use App\Models\Consumable;
use Illuminate\Foundation\Testing\DatabaseMigrations;
use Illuminate\Foundation\Testing\DatabaseTransactions;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Tests\Unit\BaseTest;

class ConsumableTest extends BaseTest
{
    /**
     * @var \UnitTester
     */
    protected $tester;

    public function testFailsEmptyValidation()
    {
        // An Consumable requires a name, a qty, and a category_id.
        $a = Consumable::create();
        $this->assertFalse($a->isValid());

        $fields = [
             'name' => 'name',
             'qty' => 'qty',
             'category_id' => 'category id',
         ];
        $errors = $a->getErrors();
        foreach ($fields as $field => $fieldTitle) {
            $this->assertEquals($errors->get($field)[0], "The ${fieldTitle} field is required.");
        }
    }

    public function testAConsumableHasRelationships()
    {
        $consumable = Consumable::factory()->cardstock()->create([
             'category_id' => $this->createValidCategory('consumable-paper-category')->id,
             'manufacturer_id' => $this->createValidManufacturer('apple')->id,
             'company_id' => $this->createValidCompany()->id,
             'location_id' => $this->createValidLocation()->id,
             'user_id' => $this->signIn()->id,
         ]);

        $this->assertInstanceOf(App\Models\User::class, $consumable->admin);
        $this->assertInstanceOf(App\Models\Company::class, $consumable->company);
        $this->assertInstanceOf(App\Models\Manufacturer::class, $consumable->manufacturer);
        $this->assertInstanceOf(App\Models\Location::class, $consumable->location);
        $this->assertInstanceOf(App\Models\Category::class, $consumable->category);
    }
}