def test_get_elements_by_classname1(self):
self.c1.className = 'c1'
attr_elms = getElementsByClassName(self.elm, 'c1')
self.assertEqual(attr_elms.length, 1)
self.assertIn(self.c1, attr_elms)
self.assertNotIn(self.c2, attr_elms)
self.assertNotIn(self.c3, attr_elms)
def getElementsByClassName(self, class_name: str) -> NodeList:
"""Get elements with class name in this document."""
return getElementsByClassName(self, class_name)