title: should test static text for tdd for example email subject?
body: <p>I'm not sure if should test static text for TDD for example email subject </p>
  
  <p>for example I have the next piece of code is necessary add a test for including proper subject? or proper "from" param?</p>
  
  <pre><code>def send_mail_complete_sectors_and_profile():
      agents = Agents.objects.filter(
          Q(is_completed_profile=False) |
          Q(has_sectors_config=False)
      )
      agent_emails = map(lambda a: a.email1, agents)
      send_mail('', '', '', agent_emails);
  </code></pre>