use std::{error::Error, process::Command}; // Run progams
use assert_cmd::prelude::*; // Add methods on commands
use predicates::prelude::*; // Used for writing assertions

#[test]
fn run_with_defaults() -> Result<(), Box<dyn Error>> {
        Command::cargo_bin("catsay")
            .expect("binary exists")
            .assert()
            .success()
            .stdout(predicate::str::contains("Meow"));
        Ok(())
    }

    fn fail_on_nonexisting_file() -> Result<(), Box<std::error::Error>> {
        Command::cargo_bin("catsay")
            .expect("binary exists")
            .args(&["-cf", "no/such/file.txt"])
            .assert()
            .failure();
        Ok(())
    }