local template_name="$1"
  local metadata_values="$4"
  local os="$5"
  local machine_type="$6"

  # First, ensure the template doesn't exist.
  # TODO(zmerlynn): To make this really robust, we need to parse the output and
  #                 add retries. Just relying on a non-zero exit code doesn't
  #                 distinguish an ephemeral failed call from a "not-exists".

		})

		pr, pw := io.Pipe()
		res, err := cst.c.Post(cst.ts.URL, "text/plain", pr)
		if err != nil {
			t.Fatal(err)
		}
		defer res.Body.Close()

		// TODO(panjf2000): sleep is not so robust, maybe find a better way to test this?
		time.Sleep(10 * time.Millisecond) // stall sending body to server to test server doesn't time out
		pw.Write([]byte(reqBody))
		pw.Close()

		got, err := io.ReadAll(res.Body)