'Test adding a tag, case insensitivity, and space stripping.'

def test_add_existent_tag(self):

    TagFactory(name='PURplepurplepurple', slug='purplepurplepurple')
    response = self.client.post(_add_tag_url(self.question.id), data={'tag-name': '    PURplepurplepurple    '}, follow=True)
    self.assertContains(response, 'purplepurplepurple')
