profiles/tests: Add networking.*.loopback test

I've added that test in NixOS/nixpkgs@4c61faa and it fails at the
moment, still leaving the channels in a broken state in regards to
networkd.

The reason I'm doing this anyway is to ensure I won't forget to add that
test here as well. We can't easily go back to the "not broken" state
anymore, except if we roll back to a version with systemd < 228.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/modules/profiles/tests.nix b/modules/profiles/tests.nix
index 12024a5a..04019b3d 100644
--- a/modules/profiles/tests.nix
+++ b/modules/profiles/tests.nix
@@ -150,6 +150,9 @@ let
     { check = config.networking.useDHCP;
       path  = ["nixos" "networking" whichNet "dhcpSimple"];
     }
+    { check = true;
+      path  = ["nixos" "networking" whichNet "loopback"];
+    }
     { check = config.networking.macvlans != {};
       path  = ["nixos" "networking" whichNet "macvlan"];
     }