text: import unittest
  from app.models import Article
  
  class ArticleTest(unittest.TestCase):
      '''
      Test Class to test the behaviour of the Article class
      '''
  
      def setUp(self):
          '''
          Set up method that will run before every Test
          '''
          self.new_article = Article('independent','Independent','https://www.independent.co.uk/news/world/asia/us-china-south-sea-navy-war-ship-tension-jim-mattis-wei-fenghe-a8625676.html','https://static.independent.co.uk/s3fs-public/thumbnails/image/2018/11/09/10/south-china-sea.jpg')
  
      def test_instance(self):
          self.assertTrue(isinstance(self.new_article,Article))