caseify 0.1.3

A CLI tool to convert strings between different cases
Documentation 
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use std::io::Write;
use std::process::{Command, Stdio};
use std::str;

#[test]
fn stdin() {
    let mut child = Command::new("./target/debug/caseify")
        .arg("Camel")
        .stdin(Stdio::piped())
        .stdout(Stdio::piped())
        .spawn()
        .expect("Failed to start process");

    {
        let stdin = child.stdin.as_mut().expect("Failed to open stdin");
        writeln!(stdin, "Hello, world!").expect("Failed to write to stdin");
    }

    let output = child.wait_with_output().expect("Failed to read stdout");
    let output_str = str::from_utf8(&output.stdout).expect("Invalid UTF-8 output");
    assert_eq!(output_str, "helloWorld\n");
}

#[test]
fn no_stdin() {
    let child = Command::new("./target/debug/caseify")
        .args(["Camel", "Hello, World!"])
        .stdout(Stdio::piped())
        .spawn()
        .expect("Failed to start process");

    let output = child.wait_with_output().expect("Failed to read stdout");
    let output_str = str::from_utf8(&output.stdout).expect("Invalid UTF-8 output");
    assert_eq!(output_str, "helloWorld\n");
}