exchange/tests/Feature/ChinaBankSlipTest.php

<?php

namespace Tests\Feature;

use Tests\TestCase;
use Illuminate\Foundation\Testing\WithFaker;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\Storage;
use Illuminate\Http\UploadedFile;
use Artisan;
use App\User;
use App\SettingCredit;
use App\Booking;
use App\UserBankSlip;
use App\Role;

class ChinaBankSlipTest extends TestCase
{
	protected $user;
    protected $booking;
    protected $userBankSlip;
	protected $setting_credit;
	
	public function setUp()
    {   
        parent::setUp();

        \DB::statement('SET FOREIGN_KEY_CHECKS=0');
        Artisan::call('db:seed');
        \DB::statement('SET FOREIGN_KEY_CHECKS=1');

        $this->user = factory(User::class)->create();
        $this->setting_credit = factory(SettingCredit::class)->create();
        $this->booking = factory(Booking::class)->create([
            'user_id' => $this->user->id
        ]);
        $this->userBankSlip = factory(UserBankSlip::class)->create([
            'booking_id' => $this->booking->id
        ]);
    }
    /**
     * A basic test example.
     *
     * @return void
     */
    public function testCreate(){
		$this->user->attachRole(Role::Where('name','admin')->first());
    	Storage::fake('file');
    	$size_in_kb = 3072;    // 3072KB = 3MB
    	$china_bank_slips_path = UploadedFile::fake()->image('comp.jpg')->size($size_in_kb);
		$response = 
		$this->actingAs($this->user)->
			postJson('/api/booking/'. $this->booking->id .'/upload-china-bankslip',[
			'file' => $china_bank_slips_path,
			'actual_transfer_amount' => '12',
			'details' => "123123",
			'date' => "123123"
		]);

		if(!file_exists($china_bank_slips_path) || $size_in_kb > 3072){
		    $response->assertStatus(400);    
		}
		else{
		    $response->assertSuccessful();
		}
    }
}