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use std::process::Stdio;
use argmax::Command;
#[cfg(not(windows))]
fn get_echo_command() -> Command {
Command::new("echo")
}
#[cfg(windows)]
fn get_echo_command() -> Command {
let mut cmd = Command::new("cmd");
cmd.try_args(&["/c", "echo"]).expect("try_args(/c echo)");
cmd
}
#[test]
fn can_execute_simple_command_with_few_arguments() {
let mut cmd = get_echo_command();
cmd.try_arg("foo").expect("try_arg(foo)");
cmd.try_arg("bar").expect("try_arg(bar)");
#[cfg(not(windows))]
assert_eq!(b"foo bar\n", &cmd.output().unwrap().stdout[..]);
#[cfg(windows)]
assert_eq!(b"foo bar\r\n", &cmd.output().unwrap().stdout[..]);
}
#[test]
fn can_run_command_with_maximum_number_of_arguments() {
let mut try_n_args = 1;
loop {
let mut cmd = get_echo_command();
cmd.stdout(Stdio::null());
let mut reached_limit = false;
let mut actual_n_args = 0;
for _ in 0..try_n_args {
if cmd.try_arg("foo").is_err() {
reached_limit = true;
break;
}
actual_n_args += 1;
}
println!("Trying execution with {} args", actual_n_args);
assert!(cmd.status().unwrap().success());
if reached_limit {
break;
}
try_n_args *= 2;
}
}
#[test]
fn can_run_command_with_single_long_argument() {
let mut length = 1;
loop {
let mut cmd = get_echo_command();
cmd.stdout(Stdio::null());
let arg = "x".repeat(length);
if cmd.try_arg(arg).is_err() {
break;
}
println!("Trying execution with argument length {}", length);
assert!(cmd.status().unwrap().success());
length *= 2;
}
}
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