docstr: Test that an error is raised if no text is provided.
docstr_tok: ["Test","that","an","error","is","raised","if","no","text","is","provided","."]
code: def test_no_text(self):
      """Test that an error is raised if no text is provided."""
      with self.assertRaises(StreamlitAPIException) as e:
          st.toast("")
      self.assertEqual(
          str(e.exception),
          "Toast body cannot be blank - please provide a message.",
      )
  
file_path: streamlit/lib/tests/streamlit/toast_test.py
imports: import streamlit
  from streamlit.errors import StreamlitAPIException
  from tests.delta_generator_test_case import DeltaGeneratorTestCase
label_desc: Use image node_id 2 for calling the ToastTest obj's underlying member method code with example usage: obj.test_no_text() without return types