text: import unittest
  from flask import current_app
  from app import create_app
  
  class appTest(unittest.TestCase):
      def setUp(self):
          self.app = create_app('testing')
          self.app_context = self.app.app_context()
          self.app_context.push()
  
      def tearDown(self):
          self.app_context.pop()
      
      def test_app_exists(self):
          self.assertFalse(current_app is None)
  
      def test_app_testing(self):
          self.assertTrue(current_app.config['TESTING'])
  