specify posix.sys.utsname:
- before:
    utsname = require "posix.sys.utsname"


- describe uname:
  - before:
      uname = utsname.uname

      u = uname ()

  - context with bad arguments:
      badargs.diagnose (uname, "()")

  - it returns a PosixUtsname:
      expect (prototype (u)).to_be "PosixUtsname"
  - it returns machine name:
      expect (u.machine).to_be (cmd_output "uname -m")
  - it returns nodename:
      expect (u.nodename).to_be (cmd_output "uname -n")
  - it returns operating system release:
      expect (u.release).to_be (cmd_output "uname -r")
  - it returns system name:
      expect (u.sysname).to_be (cmd_output "uname -s")
  - it returns operating system version:
      expect (u.version).to_be (cmd_output "uname -v")