duvis 0.1.4

Disk usage visualizer for both AI and humans
Documentation 
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pub fn format_size(bytes: u64) -> String {
    const KB: u64 = 1024;
    const MB: u64 = 1024 * KB;
    const GB: u64 = 1024 * MB;
    const TB: u64 = 1024 * GB;

    if bytes >= TB {
        format!("{:.1} TB", bytes as f64 / TB as f64)
    } else if bytes >= GB {
        format!("{:.1} GB", bytes as f64 / GB as f64)
    } else if bytes >= MB {
        format!("{:.1} MB", bytes as f64 / MB as f64)
    } else if bytes >= KB {
        format!("{:.1} KB", bytes as f64 / KB as f64)
    } else {
        format!("{} B", bytes)
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn formats_bytes() {
        assert_eq!(format_size(0), "0 B");
        assert_eq!(format_size(1023), "1023 B");
    }

    #[test]
    fn formats_kilobytes() {
        assert_eq!(format_size(1024), "1.0 KB");
        assert_eq!(format_size(1536), "1.5 KB");
    }

    #[test]
    fn formats_megabytes_and_above() {
        assert_eq!(format_size(1024 * 1024), "1.0 MB");
        assert_eq!(format_size(1024 * 1024 * 1024), "1.0 GB");
        assert_eq!(format_size(1024_u64.pow(4)), "1.0 TB");
    }
}