old_contents: import json
  from unittest import TestCase
  
  from usb import create_application
  from usb.models import db
  
  
  class APITestCase(TestCase):
  
      def setUp(self):
          self.app = create_application('config/test.py')
          self.client = self.app.test_client()
  
          db.app = self.app
          db.create_all()
  
      def tearDown(self):
          db.session.remove()
          db.drop_all()
  
      def test_redirect_from_index_namespace(self):
          pass
  
      def test_redirect_from_links_namespace(self):
          pass
  
      def test_create_short_link(self):
          pass
  
      def test_update_short_link(self):
          pass
  
      def test_get_list_of_short_links(self):
          pass
  
      def test_get_list_of_short_links_empty_db(self):
          response = self.client.get('/links')
          self.assertEqual(response.status_code, 200)
          data = json.loads(response.data)
          self.assertEqual(data, {})
  
new_contents: import json
  from unittest import TestCase
  
  from usb import create_application
  from usb.models import db
  
  
  class APITestCase(TestCase):
  
      def setUp(self):
          self.app = create_application('config/test.py')
          self.client = self.app.test_client()
  
          db.app = self.app
          db.create_all()
  
      def tearDown(self):
          db.session.remove()
          db.drop_all()
  
      def test_redirect_from_index_namespace(self):
          pass
  
      def test_redirect_from_links_namespace(self):
          pass
  
      def test_create_short_link(self):
          pass
  
      def test_update_short_link(self):
          pass
  
      def test_get_list_of_short_links(self):
          pass
  
      def test_get_list_of_short_links_empty_db(self):
          response = self.client.get('/links')
          self.assertEqual(response.status_code, 200)
          self.assertEqual(response.headers['Content-Type'], 'application/json')
          data = json.loads(response.data)
          self.assertEqual(data, {})
  
subject: Test content type for JSON API