class_docstr: Tests the platform module functions
class_docstr_tok: ["Tests","the","platform","module","functions"]
code: def test_post_parent_message(self, message: str):
      post_parent_message(message)
      c = self.get_message_from_queue().parent_message
      self.assertEqual(c.message, message)
  
imports: from parameterized import parameterized
  from streamlit.platform import post_parent_message
  from tests.delta_generator_test_case import DeltaGeneratorTestCase
label_desc: Use image node_id 1 for calling the PlatformTest obj's underlying member method code with example usage: obj.test_post_parent_message(message) without return types