add tests for parameters

tests/makeconf.pp

-include gentoo::makeconf
+class test_params {
+    $use_core = "nptl nptlonly mmx crypt tcpd pam -ipv6 unicode"
+    $use_apps = "readline ssl zlib bzip2 snmp ncurses berkdb gdbm xml perl python libwww maildir png jpeg"
+    $use_nox  = "-X -gtk -gnome -alsa -kde -qt -arts"
+    $gentoo_global_use = "$use_core $use_apps $use_nox"
+
+    $gentoo_features    = "parallel-fetch getbinpkg"
+    $gentoo_mirrors     = "http://gentoo.osuosl.org/ http://oslportage.osuosl.bak/"
+    $gentoo_sync        = "rsync://oslportage.osuosl.bak/portage/"
+    $gentoo_binhost     = "http://oslportage.osuosl.org/packages/hardened64-10"
+    $gentoo_portdir_overlay = "/usr/local/overlays/osl"
+    $gentoo_accept_license  = "dlj-1.1"
+    include gentoo::makeconf
+}
+
+include test_params
+# test no params
+# include gentoo::makeconf