old_contents: import json
  
  from social.p3 import urlencode
  from social.exceptions import AuthUnknownError
  
  from social.tests.backends.oauth import OAuth2Test
  
  
  class FacebookOAuth2Test(OAuth2Test):
      backend_path = 'social.backends.facebook.FacebookOAuth2'
      user_data_url = 'https://graph.facebook.com/me'
      expected_username = 'foobar'
      access_token_body = urlencode({
          'access_token': 'foobar',
          'token_type': 'bearer'
      })
      user_data_body = json.dumps({
          'username': 'foobar',
          'first_name': 'Foo',
          'last_name': 'Bar',
          'verified': True,
          'name': 'Foo Bar',
          'gender': 'male',
          'updated_time': '2013-02-13T14:59:42+0000',
          'link': 'http://www.facebook.com/foobar',
          'id': '110011001100010'
      })
  
      def test_login(self):
          self.do_login()
  
      def test_partial_pipeline(self):
          self.do_partial_pipeline()
  
  
  class FacebookOAuth2WrongUserDataTest(FacebookOAuth2Test):
      user_data_body = 'null'
  
      def test_login(self):
          with self.assertRaises(AuthUnknownError):
              self.do_login()
  
      def test_partial_pipeline(self):
          with self.assertRaises(AuthUnknownError):
              self.do_partial_pipeline()
  
new_contents: import json
  
  from social.exceptions import AuthUnknownError
  
  from social.tests.backends.oauth import OAuth2Test
  
  
  class FacebookOAuth2Test(OAuth2Test):
      backend_path = 'social.backends.facebook.FacebookOAuth2'
      user_data_url = 'https://graph.facebook.com/v2.3/me'
      expected_username = 'foobar'
      access_token_body = json.dumps({
          'access_token': 'foobar',
          'token_type': 'bearer'
      })
      user_data_body = json.dumps({
          'username': 'foobar',
          'first_name': 'Foo',
          'last_name': 'Bar',
          'verified': True,
          'name': 'Foo Bar',
          'gender': 'male',
          'updated_time': '2013-02-13T14:59:42+0000',
          'link': 'http://www.facebook.com/foobar',
          'id': '110011001100010'
      })
  
      def test_login(self):
          self.do_login()
  
      def test_partial_pipeline(self):
          self.do_partial_pipeline()
  
  
  class FacebookOAuth2WrongUserDataTest(FacebookOAuth2Test):
      user_data_body = 'null'
  
      def test_login(self):
          with self.assertRaises(AuthUnknownError):
              self.do_login()
  
      def test_partial_pipeline(self):
          with self.assertRaises(AuthUnknownError):
              self.do_partial_pipeline()
  
subject: Fix Facebook test case after API version change. Refs #480