pub(super) fn apply_log_buffer_limit(current_len: usize, max_entries: usize) -> bool {
current_len > max_entries
}
pub(super) fn next_log_offset_on_append(
auto_scroll: bool,
current_offset: usize,
logs_len_after_append: usize,
) -> usize {
if auto_scroll {
return 0;
}
let incremented = current_offset.saturating_add(1);
let max_offset = logs_len_after_append.saturating_sub(1);
incremented.min(max_offset)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn apply_log_buffer_limit_only_when_exceeding_max() {
assert!(!apply_log_buffer_limit(1000, 1000));
assert!(apply_log_buffer_limit(1001, 1000));
}
#[test]
fn next_log_offset_resets_when_auto_scroll_enabled() {
assert_eq!(next_log_offset_on_append(true, 7, 100), 0);
}
#[test]
fn next_log_offset_increments_and_clamps_when_auto_scroll_disabled() {
assert_eq!(next_log_offset_on_append(false, 2, 10), 3);
assert_eq!(next_log_offset_on_append(false, 10, 5), 4);
}
}