new_contents: from flexmock import flexmock
  import flask_uploads
  from flask_uploads import Upload
  from . import TestCase
  
  
  class TestWithoutResizer(TestCase):
      def test_upload_class_has_correct_attributes(self):
          assert hasattr(Upload, 'id')
          assert Upload.id == (
              'column',
              (('integer', [], {}),),
              {'autoincrement': True, 'primary_key': True}
          )
          assert hasattr(Upload, 'name')
          assert Upload.name == (
              'column',
              (('unicode', (255,), {}),),
              {'nullable': False}
          )
          assert hasattr(Upload, 'url')
          assert Upload.url == (
              'column',
              (('unicode', (255,), {}),),
              {'nullable': False}
          )
  
      def test_globals_are_set_correctly(self):
          assert flask_uploads._db is self.db
          assert flask_uploads._Storage is self.Storage
          assert flask_uploads._resizer is None
  
  
  class TestWithResizer(TestWithoutResizer):
      def setup_method(self, method):
          resizer = flexmock(
              sizes={
                  'nail': (8, 19),
                  'palm': (329, 192),
              }
          )
          TestWithoutResizer.setup_method(self, method, resizer)
  
      def test_upload_class_has_correct_attributes(self):
          TestWithoutResizer.test_upload_class_has_correct_attributes(self)
  
          assert hasattr(Upload, 'nail_name')
          assert Upload.nail_name == (
              'column',
              (('unicode', (255,), {}),),
              {}
          )
  
          assert hasattr(Upload, 'nail_url')
          assert Upload.nail_url == (
              'column',
              (('unicode', (255,), {}),),
              {}
          )
  
          assert hasattr(Upload, 'palm_name')
          assert Upload.palm_name == (
              'column',
              (('unicode', (255,), {}),),
              {}
          )
  
          assert hasattr(Upload, 'palm_url')
          assert Upload.palm_url == (
              'column',
              (('unicode', (255,), {}),),
              {}
          )
  
      def test_globals_are_set_correctly(self):
          assert flask_uploads._db is self.db
          assert flask_uploads._Storage is self.Storage
          assert flask_uploads._resizer is self.resizer
  
subject: Add tests for init function.