You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: init.rs
    path of file: ./repos/cargo-about/tests/cli
    
    the code of the file until where you have to start completion: use crate::utils::*;

use anyhow::Result;
use assert_fs::prelude::*;
use predicates::prelude::*;

#[test]
fn fails_when_manifest_absent() -> Result<()> {
    let package = Package::builder().no_manifest().build()?;

    CargoAbout::new(&package)?
        .init()
        .assert()
        .failure()
        .stderr(predicate::s
    
fn does_not_overwrite_by_default() -> Result<()> {
    let template_content = "A useless custom template";
    let config_content = "A useless invalid config";

    let package = Package::builder()
        .file(ABOUT_TEMPLATE_FILENAME, template_content)
        .file(ABOUT_CONFIG_FILENAME, config_content)
        .build()?;

    CargoAbout::new(&package)?
        .init()
        .assert()
        .success()
        .stdout("")
        .stderr("");

    let config = &package.dir.child(ABOUT_CONFIG_FILENAME);
    let template = &package.dir.child(ABOUT_TEMPLATE_FILENAME);

    assert_eq!(std::fs::read_to_string(config)?, config_content);
    assert_eq!(std::fs::read_to_string(template)?, template_content);

    Ok(())
}