clanServices: add tests for resolve modules

lib/modules/inventory/distributed-service/flake-module.nix

@@ -18,6 +18,9 @@ in
         inherit lib;
         clanLib = self.clanLib;
       };
+      legacyPackages.eval-tests-resolve-module = import ./test-resolve-module.nix {
+        inherit lib;
+      };
 
       checks = {
         eval-lib-distributedServices = pkgs.runCommand "tests" { nativeBuildInputs = [ pkgs.nix-unit ]; } ''
@@ -30,6 +33,16 @@ in
 
           touch $out
         '';
+        eval-tests-resolve-module = pkgs.runCommand "tests" { nativeBuildInputs = [ pkgs.nix-unit ]; } ''
+          export HOME="$(realpath .)"
+          nix-unit --eval-store "$HOME" \
+            --extra-experimental-features flakes \
+            --show-trace \
+            ${inputOverrides} \
+            --flake ${self}#legacyPackages.${system}.eval-tests-resolve-module
+
+          touch $out
+        '';
       };
     };
 }

lib/modules/inventory/distributed-service/test-resolve-module.nix

@@ -0,0 +1,69 @@
+# Run: nix-unit ./test-resolve-module.nix
+{
+  lib ? import <nixpkgs/lib>,
+}:
+let
+  resolveModule = import ./resolveModule.nix { inherit lib; };
+
+  fromSpec =
+    moduleSpec:
+    resolveModule {
+      inherit moduleSpec;
+      flakeInputs = {
+        self.clan.modules = {
+          foo = {
+            name = "self/foo";
+          };
+        };
+      };
+      clanCoreModules = {
+        foo = {
+          name = "clan/foo";
+        };
+        bar = {
+          name = "clan/bar";
+        };
+      };
+    };
+
+in
+{
+  test_default_clan_core = {
+    expr = fromSpec {
+      name = "foo";
+      input = null;
+    };
+    expected = {
+      name = "clan/foo";
+    };
+  };
+  test_self_module = {
+    expr = fromSpec {
+      name = "foo";
+      input = "self";
+    };
+    expected = {
+      name = "self/foo";
+    };
+  };
+  test_missing_self_module = {
+    expr = fromSpec {
+      name = "bar";
+      input = "self";
+    };
+    expectedError = {
+      type = "ThrownError";
+      msg = "flake input 'self' doesn't provide clan-module with name 'bar'";
+    };
+  };
+  test_missing_core_module = {
+    expr = fromSpec {
+      name = "nana";
+      input = null;
+    };
+    expectedError = {
+      type = "ThrownError";
+      msg = "clan-core doesn't provide clan-module with name 'nana'";
+    };
+  };
+}