as-market-binance-okx-spot/tests/hook_test.rs

// 主方法模拟
struct Main {
    spread_list: Vec<f64>,
}
impl Main {
    fn new() -> Main {
        Main {
            spread_list: Vec::new(),
        }
    }

    fn call_b(&mut self, middle: &MiddleWare) {
        let a = self;
        let hook = |deep_spread: &f64| Self::hook_func_demo(a, deep_spread);
        middle.call_hook(hook);
    }

    // 钩子演示方法
    fn hook_func_demo(&mut self, depth_spread: &f64) {
        self.spread_list.push(depth_spread.clone());
    }
}

// 中间键模拟
struct MiddleWare {
    deep_spread: f64,
}
impl MiddleWare {
    fn new(spread: f64) -> MiddleWare {
        MiddleWare {
            deep_spread: spread,
        }
    }

    fn call_hook<F: FnMut(&f64)>(&self, mut hook: F) {
        // 中间键去将钩子再传给接口
        hook(&self.deep_spread);
    }
}

// 主逻辑->中间键的钩子使用演示
#[tokio::test]
async fn test_hook() {
    let mut a = Main::new();
    let b = MiddleWare::new(0.1);

    a.call_b(&b);

    println!("{:?}", a.spread_list);
}