code: def test_clear_event(self):
      def fn_img_cleared():
          print("image cleared")
  
      with gr.Blocks() as demo:
          img = gr.Image(
              type="pil",
              label="Start by uploading an image",
              elem_id="input_image",
          )
  
          img.clear(fn_img_cleared, [], [])
  
      assert demo.config["dependencies"][0]["targets"][0][1] == "clear"
  
file_path: gradio/test/test_events.py
imports: import ast
  import inspect
  from pathlib import Path
  import pytest
  from fastapi.testclient import TestClient
  import gradio
label_desc: Use image node_id 1 for calling the TestEvent obj's underlying member method code with example usage: obj.test_clear_event() without return types