Laravel Virgin: Setting up and destroying database in phpunit integration tests - laravel

Question

Using the nilportuguess' eloquent repository library, I made the following (with bugs) repository:
namespace App\Repositories;
use NilPortugues\Foundation\Infrastructure\Model\Repository\Eloquent\EloquentRepository;
use App\Model\Rover;
class RoverRepository extends EloquentRepository
{
/**
* {#inheritdoc}
*/
protected function modelClassName()
{
return Rover::class;
}
/**
* {#inheritdoc}
*/
public function find(Identity $id, Fields $fields = null)
{
$eloquentModel = parent::find($id, $fields);
return $eloquentModel->toArray();
}
/**
* {#inheritdoc}
*/
public function findBy(Filter $filter = null, Sort $sort = null, Fields $fields = null)
{
$eloquentModelArray = parent::findBy($filter, $sort, $fields);
return $this->fromEloquentArray($eloquentModelArray);
}
/**
* {#inheritdoc}
*/
public function findAll(Pageable $pageable = null)
{
$page = parent::findAll($pageable);
return new Page(
$this->fromEloquentArray($page->content()),
$page->totalElements(),
$page->pageNumber(),
$page->totalPages(),
$page->sortings(),
$page->filters(),
$page->fields()
);
}
/**
* #param array $eloquentModelArray
* #return array
*/
protected function fromEloquentArray(array $eloquentModelArray) :array
{
$results = [];
foreach ($eloquentModelArray as $eloquentModel) {
//This is required to handle findAll returning array, not objects.
$eloquentModel = (object) $eloquentModel;
$results[] = $eloquentModel->attributesToArray();
}
return $results;
}
}
And In order to locate them I thought to make an Integration test on an sqlite inmemory db:
namespace Test\Database\Integration\Repositories;
use Tests\TestCase;
use Illuminate\Foundation\Testing\RefreshDatabase;
use App\Repositories\RoverRepository;
use App\Model\Rover;
use App\Model\Grid;
class RoverRepositoryTest extends TestCase
{
use RefreshDatabase;
private $repository=null;
public function setUp(): void
{
parent::setUp();
$grid=factory(Grid::class)->create([
'width'=>5,
'height'=>5
]);
$rover=factory(Rover::class, 5)->create([
'grid_id' => $grid->id,
'grid_pos_x' => rand(0, $grid->width),
'grid_pos_y' => rand(0, $grid->height),
]);
//How do I run Migrations and generate the db?
$this->repository = new RoverRepository();
}
public function tearDown(): void
{
parent::tearDown();
//How I truncate and destroy Database?
}
/**
* Testing Base Search
*
* #return void
*/
public function testBasicSearch(): void
{
//Some Db test
}
}
But I have some questions:
How do I save the generated via factory Models?
How do I nuke my database in tearDown()?