Update user photo helper test

Image directory should be created before copying
dummy image file.

.travis.yml

@@ -8,6 +8,7 @@ before_script:
   - travis_retry composer install --prefer-source --no-interaction --dev
   - cp .env.example .env
   - php artisan key:generate
+  - php artisan storage:link
 
 script:
   - vendor/bin/phpunit

tests/Unit/Helpers/UserPhotoHelperTest.php

@@ -54,6 +54,9 @@ class UserPhotoHelperTest extends TestCase
     {
         $photoPath = 'images/user_photo_path.jpg';
 
+        if (!is_dir(storage_path('app/public/images'))) {
+            mkdir(storage_path('app/public/images'), 0700);
+        }
         copy(public_path('images/icon_user_1.png'), storage_path('app/public/images/user_photo_path.jpg'));
 
         $this->assertFileExists(storage_path('app/public/images/user_photo_path.jpg'));