fn test_region_formats()

in src/utils/eif_signer.rs [463:478]

• 15 lines of code
• 2 McCabe index (conditional complexity)

    fn test_region_formats() {
        let valid_regions = vec![
            "us-east-1",
            "us-west-2",
            "eu-central-1",
            "ap-southeast-2",
            "cn-north-1",
            "us-gov-west-1",
        ];

        for region in valid_regions {
            let arn = format!("arn:aws:kms:{}:123456789012:key/abcd1234", region);
            let (captured_region, _) = parse_kms_arn(&arn).expect("Should match valid region");
            assert_eq!(captured_region, region);
        }
    }