old_contents: '''
  Goal: test functions in routes/api.py
  '''
  
  from .base_test import BaseTestCase
  from app.routes.api import check_email_config
  
  class RoutesApiTests(BaseTestCase):
  
      def test_check_email_config(self):
          errors = [
              'Emailing param MAIL_USERNAME was not configured.',
              'Emailing param MAIL_PASSWORD was not configured.',
              'Emailing param MAIL_SERVER was not configured.',
              'Emailing param MAIL_PORT was not configured.']
          passed, actual_errors = check_email_config()
          self.assertFalse(passed)
          self.assertEquals(errors, actual_errors)
  
new_contents: '''
  Goal: test functions in routes/api.py
  '''
  
  from .base_test import BaseTestCase
  from app.routes.api import check_email_config
  
  class RoutesApiTests(BaseTestCase):
  
      def test_check_email_config(self):
          """ Fail when nothing set """
          errors = [
              'Emailing param MAIL_USERNAME was not configured.',
              'Emailing param MAIL_PASSWORD was not configured.',
              'Emailing param MAIL_SERVER was not configured.',
              'Emailing param MAIL_PORT was not configured.']
          passed, actual_errors = check_email_config()
          self.assertFalse(passed)
          self.assertEquals(errors, actual_errors)
  
      def test_check_email_config_ok(self):
          """ Pass when all set """
          self.app.config['MAIL_USERNAME'] = 'xyz'
          self.app.config['MAIL_PASSWORD'] = 'xyz'
          self.app.config['MAIL_SERVER'] = 'xyz'
          self.app.config['MAIL_PORT'] = 'xyz'
          passed, actual_errors = check_email_config()
          self.assertTrue(passed)
          self.assertEquals([], actual_errors)
  
subject: Improve tests/test_routes_api.py