new_contents: # -*- coding: utf-8 -*-
  """
  Tests for checking the configuration for app has
  the valid checks (gstorage.apps, gstorage.checks)
  """
  from mock import patch
  from os import environ
  from unittest import TestCase
  
  from django.conf import settings
  
  from gstorage.checks import check_gstorage_params
  
  key = 'GOOGLE_APPLICATION_CREDENTIALS'
  
  
  @patch('gstorage.checks.REQUIRED_SETTINGS', [key])
  class TestStorageConfig(TestCase):
  
      def setUp(self):
          try:
              del environ[key]
          except KeyError:
              pass
  
      def test_key_error(self):
          """Test that app check throws an error when required setting is missing"""
          errors = check_gstorage_params()
          assert len(errors) >= 1
          assert errors[0].id == 'gstorage.001'
          assert errors[0].msg.find(key) == 0
  
      def test_key_settings(self):
          """Test that app check has no errors when settings is specified"""
          setattr(settings, key, '/tmp')
          assert check_gstorage_params() == []
  
      def test_key_env(self):
          """Test that app check has no errors when settings is specified as environment variable"""
          environ[key] = '/tmp'
          assert check_gstorage_params() == []
  
subject: Add missing file