coreutils/test/seq.rs

use std::process::Command;
use std::str;

static PROGNAME: &'static str = "./seq";

#[test]
fn test_count_up() {
    let p = Command::new(PROGNAME).args(&["10"]).output().unwrap();
    let out = str::from_utf8(&p.stdout).unwrap();
    assert_eq!(out, "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n");
}

#[test]
fn test_count_down() {
    let p = Command::new(PROGNAME).args(&["--", "5", "-1", "1"]).output().unwrap();
    let out = str::from_utf8(&p.stdout).unwrap();
    assert_eq!(out, "5\n4\n3\n2\n1\n");
}

#[test]
fn test_separator_and_terminator() {
    let p = Command::new(PROGNAME).args(&["-s", ",", "-t", "!", "2", "6"]).output().unwrap();
    let out = str::from_utf8(&p.stdout).unwrap();
    assert_eq!(out, "2,3,4,5,6!");
}

#[test]
fn test_equalize_widths() {
    let p = Command::new(PROGNAME).args(&["-w", "5", "10"]).output().unwrap();
    let out = str::from_utf8(&p.stdout).unwrap();
    assert_eq!(out, "05\n06\n07\n08\n09\n10\n");
}