def test_safe_output(self):
output = markdown("<div>text</div>")
self.assertEqual(conditional_escape(output), output)
def test_filter(self):
self.assertEqual(markdown(None), "<p>None</p>")
self.assertEqual(markdown(""), "")
self.assertEqual(markdown("<div>text</div>"), "<div>text</div>")
self.assertEqual(markdown("### Header ###\n\nParagraph."), "<h3>Header</h3>\n<p>Paragraph.</p>")
