class_docstr: Test ability to marshall header protos.
docstr: Test st.header with divider color.
docstr_tok: ["Test","st.header","with","divider","color","."]
code: def test_st_header_with_divider_color(self):
      """Test st.header with divider color."""
      st.header("some header", divider="blue")
  
      el = self.get_delta_from_queue().new_element
      self.assertEqual(el.heading.body, "some header")
      self.assertEqual(el.heading.tag, "h2")
      self.assertFalse(el.heading.hide_anchor, False)
      self.assertEqual(el.heading.divider, "blue")
  
imports: import pytest
  import streamlit
  from streamlit.errors import StreamlitAPIException
  from tests.delta_generator_test_case import DeltaGeneratorTestCase
label_desc: Use image node_id 7 for calling the StHeaderTest obj's underlying member method code with example usage: obj.test_st_header_with_divider_color() without return types