Macro test_set_config 

macro_rules! test_set_config {
    ($(
        $group_name:ident {
            $(
                $field_name:ident = $val:expr;
            )+
        }
    )+) => { ... };
}

A macro for tests that sets config group environment variables before XetRuntime is initialized. The environment variables follow the pattern HF_XET_{GROUP_NAME}_{FIELD_NAME}.

This macro uses ctor to run on module load, ensuring environment variables are set before any config values are read.

Example

use xet_runtime::config::XetConfig;
use xet_runtime::test_set_config;

test_set_config! {
    data {
        max_concurrent_uploads = 16;
        max_concurrent_downloads = 20;
    }
    client {
        upload_reporting_block_size = 1024000;
    }
}

// Now XetConfig::new() will pick up these values
let config = XetConfig::new();
assert_eq!(config.data.max_concurrent_uploads, 16);