//! Contract gate: backend subcommand defines self-test failure exit 4.
#[test]
fn backend_self_test_exit_code_four_in_src() {
let src = include_str!(concat!(
env!("CARGO_MANIFEST_DIR"),
"/src/subcommands/backend.rs"
));
assert!(src.contains("const EXIT_SELF_TEST_FAILED: u8 = 4"));
}