diskus 0.9.0

A minimal, fast alternative to 'du -sh'.
Documentation 
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use std::error::Error;
use std::fs::{self, File};
use std::io::Write;

use tempdir::TempDir;

use diskus::DiskUsage;

#[test]
fn size_of_files_in_nested_directories() -> Result<(), Box<dyn Error>> {
    let tmp_dir = TempDir::new("diskus-tests")?;

    // Create a 100-byte file at the root
    let file1_path = tmp_dir.path().join("file-100-byte");
    File::create(&file1_path)?.write_all(&[0u8; 100])?;

    // Create two nested directories and a 200-byte file inside
    let nested_dir = tmp_dir.path().join("dir1").join("dir2");
    fs::create_dir_all(&nested_dir)?;
    let file2_path = nested_dir.join("file-200-byte");
    File::create(&file2_path)?.write_all(&[0u8; 200])?;

    let result = DiskUsage::new(&[tmp_dir]).apparent_size().count();

    assert_eq!(result.size_in_bytes().expect("no errors"), 300);

    Ok(())
}