Macro assert_err_contains 

macro_rules! assert_err_contains {
    ($result:expr, $msg:expr, $test_name:expr) => { ... };
}

断言 Result 为 Err，且错误消息包含指定文本

示例

let result: SDKResult<()> = Err(CoreError::validation_error("app_token", "不能为空"));
let err = assert_err_contains!(result, "app_token", "test_empty_token");