ba6af23cb6
<img width="426" height="28" alt="image" src="https://github.com/user-attachments/assets/b281aca3-3c8d-4b88-a017-5d2f8ea9f3d5" />
79 lines
2.4 KiB
Rust
79 lines
2.4 KiB
Rust
use std::time::Duration;
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use std::time::Instant;
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/// Returns a string representing the elapsed time since `start_time` like
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/// "1m 15s" or "1.50s".
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pub fn format_elapsed(start_time: Instant) -> String {
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format_duration(start_time.elapsed())
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}
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/// Convert a [`std::time::Duration`] into a human-readable, compact string.
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///
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/// Formatting rules:
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/// * < 1 s -> "{milli}ms"
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/// * < 60 s -> "{sec:.2}s" (two decimal places)
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/// * >= 60 s -> "{min}m {sec:02}s"
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pub fn format_duration(duration: Duration) -> String {
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let millis = duration.as_millis() as i64;
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format_elapsed_millis(millis)
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}
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fn format_elapsed_millis(millis: i64) -> String {
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if millis < 1000 {
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format!("{millis}ms")
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} else if millis < 60_000 {
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format!("{:.2}s", millis as f64 / 1000.0)
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} else {
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let minutes = millis / 60_000;
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let seconds = (millis % 60_000) / 1000;
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format!("{minutes}m {seconds:02}s")
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_format_duration_subsecond() {
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// Durations < 1s should be rendered in milliseconds with no decimals.
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let dur = Duration::from_millis(250);
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assert_eq!(format_duration(dur), "250ms");
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// Exactly zero should still work.
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let dur_zero = Duration::from_millis(0);
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assert_eq!(format_duration(dur_zero), "0ms");
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}
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#[test]
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fn test_format_duration_seconds() {
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// Durations between 1s (inclusive) and 60s (exclusive) should be
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// printed with 2-decimal-place seconds.
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let dur = Duration::from_millis(1_500); // 1.5s
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assert_eq!(format_duration(dur), "1.50s");
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// 59.999s rounds to 60.00s
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let dur2 = Duration::from_millis(59_999);
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assert_eq!(format_duration(dur2), "60.00s");
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}
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#[test]
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fn test_format_duration_minutes() {
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// Durations ≥ 1 minute should be printed mmss.
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let dur = Duration::from_millis(75_000); // 1m15s
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assert_eq!(format_duration(dur), "1m 15s");
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let dur_exact = Duration::from_millis(60_000); // 1m0s
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assert_eq!(format_duration(dur_exact), "1m 00s");
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let dur_long = Duration::from_millis(3_601_000);
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assert_eq!(format_duration(dur_long), "60m 01s");
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}
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#[test]
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fn test_format_duration_one_hour_has_space() {
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let dur_hour = Duration::from_millis(3_600_000);
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assert_eq!(format_duration(dur_hour), "60m 00s");
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}
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}
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