Forking with anything besides inherit causes stdio not to be a TTY.

[jamestalmage]

Most CLI's expect (TTY.isatty())[https://nodejs.org/api/tty.html#tty_tty_isatty_fd], and process.stdout.isTTY to return true. It's conceivable they will behave differently when those return false (a well designed CLI probably should).

This complicates things. Some people have tried to develop pty support for node. AVA itself fakes TTY support in forked processes here.

Both approaches have significant downsides.

• pty requires native components and a build step, and so is inherently fragile for cross-platform development.
• AVA's approach requires you execute code before the forked process runs. It's not a problem for AVA, since we're doing that to set up the test environment anyways, but would be harder for a general use library. Also, it only works for CLI's written in Node.

[arve0]

Thanks for reporting 👍 Did not know that TTY was that complicated, naive approach here 😅

I'll note this in the README. At least it works for inherited forks.