fn write_auto(fs: Fs) -> Bool {
    let created: Maybe<owned<File>> = std.fs.create(fs, ".zero/conformance/std-fs-resource.txt")
    if created.has {
        var file: owned<File> = created.value
        let bytes: [10]u8 = [122, 101, 114, 111, 32, 102, 105, 108, 101, 10]
        return std.fs.writeAll(&mut file, bytes)
    }
    return false
}

pub fn main(world: World) -> Void raises {
    let fs: Fs = std.fs.host()
    let wrote: Bool = write_auto(fs)
    let missing: Maybe<owned<File>> = std.fs.open(fs, ".zero/conformance/std-fs-resource-missing.txt")
    let opened: Maybe<owned<File>> = std.fs.open(fs, ".zero/conformance/std-fs-resource.txt")
    if wrote && !missing.has && opened.has {
        var file: owned<File> = opened.value
        var buf: [10]u8 = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
        let read: Maybe<usize> = std.fs.read(&mut file, buf)
        std.fs.close(&mut file)
        if read.has && read.value == 10 && buf[0] == 122 as u8 && buf[9] == 10_u8 {
            check world.out.write("fs resource ok\n")
        }
    }
}