code: def test_response_json():
      response = Response.json({"this_is": "json"})
      assert 200 == response.status
      assert '{"this_is": "json"}' == response.body
      assert "application/json; charset=utf-8" == response.content_type
  
imports: from datasette.utils.asgi import Response
  import pytest
label_desc: Use image node_id 3 for calling a global function with example usage: test_response_json() without return types