packages/checks/default.nix

@@ -1,5 +1,11 @@
 { config, lib, self, ... }:
 
+let
+  timeMachine = {
+    preUnstable = config.lib.timeTravel "637f048ee36d5052e2e7938bf9039e418accde66";
+  };
+in
+
 {
   perSystem = { filters, pkgs, self', system, ... }: {
     checks = lib.mkIf (system == "x86_64-linux") {
@@ -14,6 +20,11 @@
         inherit (config) cluster;
       };
 
+      ipfs-cluster-upgrade = pkgs.callPackage ./ipfs-cluster-upgrade.nix {
+        inherit (self) nixosModules;
+        previous = timeMachine.preUnstable;
+      };
+
       jellyfin-stateless = pkgs.callPackage ./jellyfin-stateless.nix {
         inherit (self'.packages) jellyfin;
         inherit (config) cluster;

packages/checks/ipfs-cluster-upgrade.nix

@@ -0,0 +1,45 @@
+{ testers, nixosModules, lib, ipfs-cluster, previous, system }:
+
+testers.runNixOSTest {
+  name = "ipfs-cluster-upgrade";
+
+  extraBaseModules = {
+    imports = [
+      nixosModules.ipfs
+      nixosModules.ipfs-cluster
+      nixosModules.systemd-extras
+    ];
+
+    services.ipfs = {
+      enable = true;
+      apiAddress = "/ip4/127.0.0.1/tcp/5001";
+    };
+    services.ipfs-cluster = {
+      enable = true;
+      openSwarmPort = true;
+      consensus = "crdt";
+      package = previous.packages.${system}.ipfs-cluster;
+    };
+    specialisation.upgrade = {
+      inheritParentConfig = true;
+      configuration = {
+        services.ipfs-cluster.package = lib.mkForce ipfs-cluster;
+      };
+    };
+  };
+
+  nodes.machine = {};
+
+  testScript = /*python*/ ''
+    machine.wait_for_unit("ipfs.service")
+    machine.wait_for_unit("ipfs-cluster.service")
+    machine.succeed("ipfs-cluster-ctl add -r -n TestPin123 /var/empty")
+    
+    machine.succeed("systemctl stop ipfs-cluster.service")
+    machine.succeed("/run/current-system/specialisation/upgrade/bin/switch-to-configuration test")
+
+    machine.wait_for_unit("ipfs-cluster.service")
+    machine.succeed("systemctl is-active ipfs-cluster.service")
+    machine.succeed("ipfs-cluster-ctl pin ls | grep TestPin123")
+  '';
+}