How to successfully execute test via phpunit within relationship between two models? - laravel

Question

I'm new in Laravel. I have 2 tables Productions and Products. Also, I have 2 factories ProductionFactory and ProductFactory. I want to test them via phpunit. Their connection is via production_id.
Error is ErrorException: Undefined variable: production.
I don't get it.
Thanks in advance.
This is a code.
ProductionFactory.php
$factory->define(App\Production::class, function (Faker $faker) {
return [
'name' =>$faker->name,
];
});
ProductFactory.php
$factory->define(App\Product::class, function (Faker $faker) {
$production_id = App\Production::pluck('id');
if(!$production_id->isEmpty()){
$production = $production_id->random();
}
return [
'id' =>$faker->uuid,
'name' =>$faker->name,
'price' => $faker->numberBetween($min = 100, $max = 900),
'description' =>Str::random(10),
'production_id'=> $production,
];
ProductionTest.php
class ProductionTest extends TestCase
{
use RefreshDatabase;
/**
* A basic unit test example.
* #test
* #return void
*/
public function production()
{
factory(Production::class)->make();
$this->assertTrue(true);
}
}
ProductTest.php
class ProductTest extends TestCase
{
use RefreshDatabase;
/**
* A basic unit test example.
* #test
* #return void
*/
public function product()
{
factory(Product::class)->make();
$this->assertTrue(true);
}
}

Answer 1

Model Production
use Illuminate\Database\Eloquent\SoftDeletes;
class Production extends Model
{
use SoftDeletes;
protected $fillable = [
'name',
];
public function products()
{
return $this->hasMany('App\Product');
}
Model Product
class Product extends Model
{
use SoftDeletes;
protected $fillable = [
'id','name','price','description','production_id'
];
public function production()
{
return $this->belongsTo('App\Production');
}
SQLSTATE[HY000]: General error: 1364 Field 'production_id' doesn't have a default value

Answer 2

It depends on what functionality should be tested.
A basic test to check the model relationship is set correctly?
I pushed a working demo to GitHub (https://github.com/.../laravel-basic-relationship-tests).
App/Product.php
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Product extends Model
{
public function production()
{
return $this->belongsTo(Production::class);
}
}
App/Production.php
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Production extends Model
{
public function products()
{
return $this->belongsTo(Product::class);
}
}
Product Factory
<?php
/* #var $factory \Illuminate\Database\Eloquent\Factory */
use App\Product as Model;
use Faker\Generator as Faker;
$factory->define(Model::class, function (Faker $faker) {
$production = factory(\App\Production::class)->make();
$production->save();
return [
'name' => $faker->name,
'price' => $faker->numberBetween($min = 100, $max = 900),
'description' => $faker->text,
'production_id' => $production->id
];
});
Production Factory
<?php
/* #var $factory \Illuminate\Database\Eloquent\Factory */
use App\Production as Model;
use Faker\Generator as Faker;
$factory->define(Model::class, function (Faker $faker) {
return [
'name' => $faker->name
];
});
$factory->afterCreatingState(Model::class, 'seed', function ($production, $faker) {
$product = factory(\App\Product::class)->make();
$production->products()->associate($product);
});
Product Test
<?php
namespace Tests\Feature;
use Tests\TestCase;
use Illuminate\Foundation\Testing\WithFaker;
use Illuminate\Foundation\Testing\RefreshDatabase;
class ProductTest extends TestCase
{
/**
* #return void
*/
public function testProductHasWorkingProductionRelationship()
{
$product = factory(\App\Product::class)->create();
$this->assertNotEmpty($product->production);
}
}
Production Test
<?php
namespace Tests\Feature;
use Tests\TestCase;
use Illuminate\Foundation\Testing\WithFaker;
use Illuminate\Foundation\Testing\RefreshDatabase;
class ProductionTest extends TestCase
{
/**
* #return void
*/
public function testProductionHasWorkingProductRelationship()
{
$production = factory(\App\Production::class)->state('seed')->create();
$this->assertNotEmpty($production->products);
}
}
Hope this is a great starting point for any further tests.