unit test with a trait

class ShipmentManager extends StockManager implements Receivable
{
    use EmployeeTrait;

    public function receive(ProductDTO $product)
    {
        $qty = $product->getQuantity();
        $stock = $this->stockRepository
            ->skipPresenter(true)
            ->firstOrCreate([
                'product_id' => $product->getId(),
                'warehouse_id' => config('setting.warehouse.taipei'),
            ]);

        $stock->quantity = $stock->quantity + (int)$qty;
        $stock->save();

        $this->stockMvtRepository->create(
            [
                'stock_id' => $stock->id,
                'quantity' => $qty,
                'sign' => 1,
                'employee_id' => $this->getEmployee()->id,
            ]
        );

        return $this;
    }

}



public function test_receive()
{
        /** arrange */
        $product = new ProductDTO();
        $employee = new \stdClass();
        //assign ...
        $mock = Mockery::mock(ShipmentManager::class)->makePartial();
        $mock->shouldReceive('getEmployee')->andReturn($employee);
        $shipmentManager = $this->app->make(ShipmentManager::class);//應該是這裡沒有處理好

        /** act */
        $shipmentManager->receive($product);

        /** assert */
        //從 model 取出 data 看數量有沒有+1
}

use Mockery as m;
use PHPUnit\Framework\TestCase;

class SampleTest extends TestCase
{
    protected function setUp()
    {
        parent::setUp();
    }

    protected function tearDown()
    {
        m::close();
    }

    /**
     * @test
     */
    public function testTrait()
    {
        /** @var SampleTraitDemo|m\Mock $target */
        $target = m::mock(SampleTraitDemo::class)->makePartial();
        $target->shouldReceive('thisIsATrait')
               ->andReturn('i am mock');

        $expected = 'use Trait - i am mock';

        $actual = $target->useTrait();

        $this->assertSame($expected, $actual);
    }
}

trait ATrait
{
    public function thisIsATrait()
    {
        return 'a real trait';
    }
}

class SampleTraitDemo
{
    use ATrait;

    public function useTrait()
    {
        return ('use Trait - ' . $this->thisIsATrait());
    }
}