Add build-clan module

lib/build-clan/tests.nix

@@ -0,0 +1,135 @@
+{
+  lib,
+  nixpkgs,
+  clan-core,
+  buildClan,
+  ...
+}:
+let
+  eval = import ./eval.nix { inherit lib nixpkgs clan-core; };
+
+  self = ./.;
+  evalClan = eval { inherit self; };
+
+in
+#######
+{
+  test_only_required =
+    let
+      config = evalClan { directory = ./.; };
+    in
+    {
+      expr = config.pkgsForSystem null == null;
+      expected = true;
+    };
+
+  test_all_simple =
+    let
+      config = evalClan {
+        directory = ./.;
+        machines = { };
+        inventory = {
+          meta.name = "test";
+        };
+        pkgsForSystem = _system: { };
+      };
+    in
+    {
+      expr = config ? inventory;
+      expected = true;
+    };
+
+  test_outputs_clanInternals =
+    let
+      config = evalClan {
+        imports = [
+          # What the user needs to specif
+          {
+            directory = ./.;
+            inventory.meta.name = "test";
+          }
+
+          # Build-clan implementation
+          ./module.nix
+          # Explicit output, usually defined by flake-parts
+          { options.nixosConfigurations = lib.mkOption { type = lib.types.raw; }; }
+        ];
+      };
+    in
+    {
+      expr = config.clanInternals.meta;
+      expected = {
+        description = null;
+        icon = null;
+        name = "test";
+      };
+    };
+
+  test_fn_simple =
+    let
+      result = buildClan {
+        directory = ./.;
+        meta.name = "test";
+      };
+    in
+    {
+      expr = result.clanInternals.meta;
+      expected = {
+        description = null;
+        icon = null;
+        name = "test";
+      };
+    };
+
+  test_fn_extensiv_meta =
+    let
+      result = buildClan {
+        directory = ./.;
+        meta.name = "test";
+        meta.description = "test";
+        meta.icon = "test";
+        inventory.meta.name = "superclan";
+        inventory.meta.description = "description";
+        inventory.meta.icon = "icon";
+      };
+    in
+    {
+      expr = result.clanInternals.meta;
+      expected = {
+        description = "description";
+        icon = "icon";
+        name = "superclan";
+      };
+    };
+
+  test_fn_clan_core =
+    let
+      result = buildClan {
+        directory = ../../.;
+        meta.name = "test-clan-core";
+      };
+    in
+    {
+      expr = builtins.attrNames result.nixosConfigurations;
+      expected = [ "test-inventory-machine" ];
+    };
+
+  test_buildClan_all_machines =
+    let
+      result = buildClan {
+        directory = ./.;
+        meta.name = "test";
+        inventory.machines.machine1.meta.name = "machine1";
+
+        machines.machine2 = { };
+
+      };
+    in
+    {
+      expr = builtins.attrNames result.nixosConfigurations;
+      expected = [
+        "machine1"
+        "machine2"
+      ];
+    };
+}