Laravel - 单元测试 - 整数数据类型的变量以字符串形式出现，而单元测试和单元测试失败

Question

I'm new to Laravel and PHP. I have created a migration 'Car' table with columns id, Make, Model, Year.I have used the seeder to make 50 cars using faker. I have written a unit test to test the data type of the year property to be int, but my unit test is failing. Could anyone pls help me on this?

Migration table:
 public function up()
    {
        Schema::create('cars', function (Blueprint $table) {
            $table->increments('id');
            $table->string('make');
            $table->string('model');
            $table-> integer('year');
            $table->timestamps();
        });

Factory:
$factory->define(App\Car::class, function (Faker $faker) {
    return [
        'make' => $faker->randomElement($array = array ('Ford','Honda','Toyota')),
        'model' => $faker->name,
        'year'   => $faker->year($max = 'now'),

Seeder
    public function run()
    {
        factory(App\Car::class, 50)->create()->each(function ($car) 
}

Unit test 
 public function testCarYearDataType()
    {
        $car = Car::find(1);
        dd($car->year);
      dd(gettype($car->Year));
       this->assertInternalType('int',$car->Year);
    }

Answer 1

Not sure datatype is the right kind of test but anyway

The key thing to remember is you need to have a different database for testing my case I use memory so my phpunit.xml looks like the following

<env name="APP_ENV" value="testing"/>
<env name="CACHE_DRIVER" value="array"/>
<env name="SESSION_DRIVER" value="array"/>
<env name="QUEUE_DRIVER" value="sync"/>
<env name="DB_CONNECTION" value="sqlite"/>
<env name="DB_DATABASE" value=":memory:"/>

The you will have your test class. In your case I would call it CarTest.php

<?php 

namespace Tests\Unit;

use Illuminate\Foundation\Testing\DatabaseTransactions;
use Tests\TestCase;


class CarTest extends TestCase {

    use DatabaseTransactions;
    
   
    
    public function testCarYearDataType()
    {
    
     //just create 1 car as all the cars will have same data type anyway
      factory(App\Car::class)->create(); 

       this->assertInternalType('int', gettype(Car::first()->year));
    }
}

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