class_docstr: Test ability to marshall header protos.
docstr: Test st.header.
docstr_tok: ["Test","st.header","."]
code: def test_st_header(self):
      """Test st.header."""
      st.header("some header")
  
      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.assertFalse(el.heading.divider)
  
imports: import pytest
  import streamlit
  from streamlit.errors import StreamlitAPIException
  from tests.delta_generator_test_case import DeltaGeneratorTestCase
label_desc: Use image node_id 1 for calling the StHeaderTest obj's underlying member method code with example usage: obj.test_st_header() without return types