django - get user logged into test client
def test_author_set_once(self):
    self.client.login(username='Adam', password='password')
    #create an object and test the author is adam
    self.client.login(username='Barry', password='password')
    #modify the first object and test that the author has not changed

self.assertEqual(object.author, self.client.user)

self.client.login(username='Adam', password='password')
self.user = User.objects.get(username='Adam')
#create an object
self.assertEqual(object.author, self.user)

response.request.user