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//! Typed health-pipeline error.
/// A health-pipeline failure.
///
/// `Message` carries a CLI-facing message the CLI boundary renders; `Printed`
/// marks an error a lower layer (the runtime-coverage seam) already printed, so
/// the boundary must NOT re-print it, only honor its exit code.
#[derive(Debug, Clone)]
pub enum HealthError {
/// A failure the CLI boundary still needs to render.
Message {
/// CLI-facing error message.
message: String,
/// Exit code this failure terminates with.
exit_code: u8,
},
/// Already emitted by a lower layer; carry only the exit code.
Printed(u8),
}
impl HealthError {
/// Build a [`HealthError::Message`] from a message and exit code.
#[must_use]
pub fn message(message: impl Into<String>, exit_code: u8) -> Self {
Self::Message {
message: message.into(),
exit_code,
}
}
/// The exit code this failure terminates with.
#[must_use]
pub fn exit_code(&self) -> u8 {
match self {
Self::Message { exit_code, .. } => *exit_code,
Self::Printed(code) => *code,
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn message_carries_text_and_code() {
let err = HealthError::message("boom", 2);
assert_eq!(err.exit_code(), 2);
match err {
HealthError::Message { message, exit_code } => {
assert_eq!(message, "boom");
assert_eq!(exit_code, 2);
}
HealthError::Printed(_) => panic!("expected Message variant"),
}
}
#[test]
fn printed_carries_only_code() {
let err = HealthError::Printed(5);
assert_eq!(err.exit_code(), 5);
assert!(matches!(err, HealthError::Printed(5)));
}
}