Fix testing with token

Author: willbeaufoy

rest_framework/test.py

@@ -277,7 +277,7 @@ def force_authenticate(self, user=None, token=None):
         """
         self.handler._force_user = user
         self.handler._force_token = token
-        if user is None:
+        if user is None and token is None:
             self.logout()  # Also clear any possible session info if required
 
     def request(self, **kwargs):

tests/test_testing.py

@@ -102,8 +102,9 @@ def test_force_authenticate_with_sessions(self):
         response = self.client.get('/session-view/')
         assert response.data['active_session'] is True
 
-        # Force authenticating as `None` should also logout the user session.
-        self.client.force_authenticate(None)
+        # Force authenticating with `None` user and token should also logout
+        # the user session.
+        self.client.force_authenticate(user=None, token=None)
         response = self.client.get('/session-view/')
         assert response.data['active_session'] is False