chore(tests): Add integration tests to checks in main flake.nix

flake.lock

@@ -1,5 +1,25 @@
 {
   "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1754487366,
+        "narHash": "sha256-pHYj8gUBapuUzKV/kN/tR3Zvqc7o6gdFB9XKXIp1SQ8=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "af66ad14b28a127c5c0f3bbb298218fc63528a18",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
@@ -56,6 +76,7 @@
     },
     "root": {
       "inputs": {
+        "flake-parts": "flake-parts",
         "flake-utils": "flake-utils",
         "nix-vm-test": "nix-vm-test",
         "nixpkgs": "nixpkgs",

flake.nix

@@ -3,6 +3,9 @@
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
     flake-utils.url = "github:numtide/flake-utils";
 
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
+
     nix-vm-test.url = "github:numtide/nix-vm-test";
     nix-vm-test.inputs.nixpkgs.follows = "nixpkgs";
     nix-vm-test.inputs.flake-utils.follows = "flake-utils";
@@ -23,6 +26,7 @@
       nix-vm-test,
       rust-overlay,
       treefmt-nix,
+      flake-parts,
       ...
     }@inputs:
     nixpkgs.lib.foldl (a: b: nixpkgs.lib.recursiveUpdate a b) { } [
@@ -183,7 +187,16 @@
             };
 
             checks =
-              {
+              import ./tests/integration/integration-checks.nix {
+                inherit system;
+                pkgs = inputs.nixpkgs;
+                lib = nixpkgs.lib;
+                rosenpassNew = self.packages.${system}.default;
+                rosenpassOld =
+                  (builtins.getFlake "github:rosenpass/rosenpass?rev=916a9ebb7133f0b22057fb097a473217f261928a")
+                  .packages.${system}.default;
+              }
+              // {
                 systemd-rosenpass = pkgs.testers.runNixOSTest ./tests/systemd/rosenpass.nix;
                 systemd-rp = pkgs.testers.runNixOSTest ./tests/systemd/rp.nix;
                 formatting = treefmtEval.config.build.check self;