如何为集成测试初始化​​记录器? [英] How to initialize the logger for integration tests?

问题描述

我在 src 目录中有一个带有生产代码的 crate，在 tests 目录中有集成测试.生产代码使用 log 宏.

I have a crate with production code in the src directory and integration tests in the tests directory. The production code uses log macros.

我想在运行集成测试时初始化一个全局记录器(例如 env_logger::init().unwrap();)有几个测试，没有定义测试顺序，所以我不知道我应该把初始化命令放在哪个测试中.

I would like to init a global logger when running the integration tests (e.g. env_logger::init().unwrap();) There are several tests and the test order is not defined, so I don't know in which test I should put the initialize command.

有什么办法可以很好地做到这一点吗?也许通过覆盖测试 main 函数?

Is there any way I can do this nicely? Perhaps by overriding the tests main function?

推荐答案

你可以这样使用:

use std::sync::Once;

static INIT: Once = Once::new();

/// Setup function that is only run once, even if called multiple times.
fn setup() {
    INIT.call_once(|| {
        env_logger::init().unwrap();
    });
}

然后在每次测试开始时简单地调用 setup().

Then simply call setup() in the beginning of each test.

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