chore: add nixtest for testing and a couple of tests

cells/repo/flake.lock

@@ -69,12 +69,31 @@
         "type": "gitlab"
       }
     },
+    "nixtest-lib": {
+      "locked": {
+        "dir": "lib",
+        "lastModified": 1765728058,
+        "narHash": "sha256-V3FXECl1oTxEtGteNz3o3GJs/X8asSn1TxRpZ2F+htU=",
+        "owner": "TECHNOFAB",
+        "repo": "nixtest",
+        "rev": "2477ad31ae3aa4134e1bb5eeddbebe0cb64ccb57",
+        "type": "gitlab"
+      },
+      "original": {
+        "dir": "lib",
+        "owner": "TECHNOFAB",
+        "ref": "v1.2.1",
+        "repo": "nixtest",
+        "type": "gitlab"
+      }
+    },
     "root": {
       "inputs": {
         "devshell": "devshell",
         "devtools-lib": "devtools-lib",
         "nix-gitlab-ci-lib": "nix-gitlab-ci-lib",
         "nixmkdocs": "nixmkdocs",
+        "nixtest-lib": "nixtest-lib",
         "soonix-lib": "soonix-lib",
         "treefmt-nix": "treefmt-nix"
       }

cells/repo/flake.nix

@@ -5,6 +5,7 @@
     soonix-lib.url = "gitlab:TECHNOFAB/soonix?dir=lib";
     nix-gitlab-ci-lib.url = "gitlab:TECHNOFAB/nix-gitlab-ci/3.1.2?dir=lib";
     devtools-lib.url = "gitlab:rensa-nix/devtools?dir=lib";
+    nixtest-lib.url = "gitlab:TECHNOFAB/nixtest/v1.2.1?dir=lib";
     treefmt-nix = {
       url = "github:numtide/treefmt-nix";
       flake = false;
@@ -18,6 +19,8 @@
       doclib = i.nixmkdocs.lib {inherit (i.parent) pkgs;};
       soonix = i.soonix-lib.lib {inherit (i.parent) pkgs;};
       cilib = i.nix-gitlab-ci-lib.lib {inherit (i.parent) pkgs;};
+      ntlib = i.nixtest-lib.lib {inherit (i.parent) pkgs;};
+      rensa = import "${i.parent.self}/lib" {inherit (i.parent.pkgs) lib;};
       treefmt = import i.treefmt-nix;
     };
 }

cells/repo/tests.nix

@@ -0,0 +1,10 @@
+{inputs, ...}: let
+  inherit (inputs) pkgs ntlib rensa;
+in {
+  tests = ntlib.mkNixtest {
+    modules = ntlib.autodiscover {dir = "${inputs.self}/tests";};
+    args = {
+      inherit pkgs ntlib rensa;
+    };
+  };
+}