def test_smtpapiheader_as_django_header(self):
"""Test django ready email header dict."""
expected = {'X-SMTPAPI': '{"category": "foo", "filters": {"category": {"settings": {"setting": "value"}}}}'}
h = SmtpApiHeader()
h.set_category('foo')
h.add_filter_setting('category', 'setting', 'value')
self.assertEqual(h.as_django_email_header(), expected)
