test case for https://github.com/softprops/atty/issues/34 - after building main.rs as a binary crate called testatty, run notty.py

Cargo.toml

[package]
name = "testatty"
version = "0.1.0"
authors = ["vagrant"]
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
atty = { path= "../atty"}
isatty = { path="../isatty"}

main.rs

//use atty;
use isatty;

fn main() {
    //if atty::is(atty::Stream::Stdout) {
   if isatty::stdout_isatty() {
      println!("Yes TTY");
   } else { println!("NO TTY"); }
}

notty.py

import os
import subprocess
import tempfile

# this makess isatty panic
path = '\\\\?\\C:\\' + os.path.join(*(['a'* 8]*12)) + ('a'*19 + '.txt')

# this would've made atty fail, but doesn't since it does correct offset calculations.
# path = '\\\\?\\C:\\' + os.path.join(*(['a'* 8]*26)) + ('a'*25 + '.txt')
print(len(path), path)
if not os.path.exists(os.path.dirname(path)):
  os.makedirs(os.path.dirname(path))

with open(path, 'w') as fp, tempfile.TemporaryFile('r') as stdin, tempfile.TemporaryFile() as stderr:
  try:
    print(subprocess.check_call(["target\\debug\\testatty.exe"], stdout=fp, stdin=stdin, stderr=stderr))
  except subprocess.CalledProcessError as e:
    print(e)
  stderr.seek(0)
  print("STDERR", stderr.read())

with open(path, 'r') as fp:
  print(fp.read())