#[macro_export]
macro_rules! nu {
    (cwd: $cwd:expr, $path:expr, $($part:expr),*) => {{
        use $crate::fs::DisplayPath;

        let path = format!($path, $(
            $part.display_path()
        ),*);

        nu!($cwd, &path)
    }};

    (cwd: $cwd:expr, $path:expr) => {{
        nu!($cwd, $path)
    }};

    ($cwd:expr, $path:expr) => {{
        pub use std::error::Error;
        pub use std::io::prelude::*;
        pub use std::process::{Command, Stdio};

        let commands = &*format!(
            "
                            cd {}
                            {}
                            exit",
            $crate::fs::in_directory($cwd),
            $crate::fs::DisplayPath::display_path(&$path)
        );

        let mut process = match Command::new($crate::fs::executable_path())
            .stdin(Stdio::piped())
            .stdout(Stdio::piped())
            .spawn()
        {
            Ok(child) => child,
            Err(why) => panic!("Can't run test {}", why.description()),
        };

        let stdin = process.stdin.as_mut().expect("couldn't open stdin");
        stdin
            .write_all(commands.as_bytes())
            .expect("couldn't write to stdin");


        let output = process
            .wait_with_output()
            .expect("couldn't read from stdout");

        let out = String::from_utf8_lossy(&output.stdout);
        let out = out.replace("\r\n", "");
        let out = out.replace("\n", "");
        out
    }};
}

#[macro_export]
macro_rules! nu_error {
    (cwd: $cwd:expr, $path:expr, $($part:expr),*) => {{
        use $crate::fs::DisplayPath;

        let path = format!($path, $(
            $part.display_path()
        ),*);

        nu_error!($cwd, &path)
    }};

    (cwd: $cwd:expr, $path:expr) => {{
        nu_error!($cwd, $path)
    }};

    ($cwd:expr, $path:expr) => {{
        pub use std::error::Error;
        pub use std::io::prelude::*;
        pub use std::process::{Command, Stdio};

        let commands = &*format!(
            "
                            cd {}
                            {}
                            exit",
            $crate::fs::in_directory($cwd),
            $crate::fs::DisplayPath::display_path(&$path)
        );

        let mut process = Command::new($crate::fs::executable_path())
            .stdin(Stdio::piped())
            .stderr(Stdio::piped())
            .spawn()
            .expect("couldn't run test");

        let stdin = process.stdin.as_mut().expect("couldn't open stdin");
        stdin
            .write_all(commands.as_bytes())
            .expect("couldn't write to stdin");

        let output = process
            .wait_with_output()
            .expect("couldn't read from stderr");

        let out = String::from_utf8_lossy(&output.stderr);
        out.into_owned()
    }};
}