def METHOD_NAME():
    """Iterates through ESSENTIAL_BINARIES and tests them.
    """
    ok = CheckStatus.OK
    for binary in sorted(ESSENTIAL_BINARIES):
        try:
            if not is_executable(binary):
                ok = CheckStatus.ERROR
        except TimeoutExpired:
            cli.log.debug('Timeout checking %s', binary)
            if ok != CheckStatus.ERROR:
                ok = CheckStatus.WARNING
    return ok