text: import unittest
  from app.models import Article
  
  class ArticleTest(unittest.TestCase):
      '''
      Test Class to test the behaviour of the Source class
      '''
      def setUp(self):
          '''
          Set up method that will run before every Test
          '''
          self.new_article = Article('Test author','Test title','Test description','Test url','Test image','Test publishedAt')
  
      def test_instance(self):
          self.assertTrue(isinstance(self.new_article,Article))