def METHOD_NAME(gui: Gui, test_client, helpers):
    gui._set_frame(inspect.currentframe())
    gui._bind_var_val("x", 10)
    gui._bind_var_val("y", 20)
    md_string = "<|x + y = {x + y}|>"
    expected_list = [
        "<Field",
        'dataType="str"',
        'defaultValue="x + y = 30"',
        "value={tp_TpExPr_x_y_x_y_TPMDL_0_0}",
    ]
    helpers.test_control_md(gui, md_string, expected_list)