text: from fastapi.testclient import TestClient
  
  from docs_src.custom_request_and_route.tutorial002 import app
  
  client = TestClient(app)
  
  
  def test_endpoint_works():
      response = client.post("/", json=[1, 2, 3])
      assert response.json() == 6
  
  
  def test_exception_handler_body_access():
      response = client.post("/", json={"numbers": [1, 2, 3]})
  
      assert response.json() == {
          "detail": {
              "body": '{"numbers": [1, 2, 3]}',
              "errors": [
                  {
                      "loc": ["body"],
                      "msg": "value is not a valid list",
                      "type": "type_error.list",
                  }
              ],
          }
      }
  