class_docstr: Test ability to marshall divider protos.
class_docstr_tok: ["Test","ability","to","marshall","divider","protos","."]
code: def test_divider(self):
      st.divider()
  
      c = self.get_delta_from_queue().new_element.markdown
      self.assertEqual(c.body, "---")
  
imports: import streamlit
  from tests.delta_generator_test_case import DeltaGeneratorTestCase
label_desc: Use image node_id 1 for calling the DividerTest obj's underlying member method code with example usage: obj.test_divider() without return types