guard-core-engine 4.3.1

Detection engine for the Guard ecosystem: pattern compilation, input preprocessing, and semantic analysis.
Documentation 
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//! The probe child binary's non-probe invocation prints usage and exits
//! with the usage code.

#[test]
fn the_probe_binary_prints_usage_without_its_subcommand() {
    let output = std::process::Command::new(env!("CARGO_BIN_EXE_guard-pattern-probe"))
        .output()
        .expect("binary runs");
    assert_eq!(output.status.code(), Some(2));
    let stderr = String::from_utf8_lossy(&output.stderr);
    assert!(stderr.contains("usage: guard-pattern-probe"), "{stderr}");
}