inventory test framework: init

Add nixos test module checks/lib/test-inventory-nix

accepts new option `inventory` and creates machines accordingly with correct imports

checks/dummy-inventory-test/default.nix

@@ -0,0 +1,26 @@
+(import ../lib/test-inventory.nix) (
+  { ... }:
+  {
+    name = "dummy-inventory-test";
+
+    inventory = {
+      machines.peer1 = { };
+      machines.admin1 = { };
+      services = {
+        dummy-module.default = {
+          roles.peer.machines = [ "peer1" ];
+          roles.admin.machines = [ "admin1" ];
+        };
+      };
+      modules = {
+        dummy-module = ./dummy-module;
+      };
+    };
+
+    testScript = ''
+      start_all()
+      admin1.wait_for_unit("dummy-service")
+      peer1.wait_for_unit("dummy-service")
+    '';
+  }
+)

checks/dummy-inventory-test/dummy-module/README.md

@@ -0,0 +1,10 @@
+---
+description = "Set up dummy-module"
+categories = ["System"]
+features = [ "inventory" ]
+
+[constraints]
+roles.admin.min = 1
+roles.admin.max = 1
+---
+

checks/dummy-inventory-test/dummy-module/roles/admin.nix

@@ -0,0 +1,5 @@
+{
+  imports = [
+    ./shared.nix
+  ];
+}

checks/dummy-inventory-test/dummy-module/roles/peer.nix

@@ -0,0 +1,5 @@
+{
+  imports = [
+    ./shared.nix
+  ];
+}

checks/dummy-inventory-test/dummy-module/roles/shared.nix

@@ -0,0 +1,13 @@
+{ pkgs, ... }:
+{
+  systemd.services.dummy-service = {
+    enable = true;
+    description = "Dummy service";
+    wantedBy = [ "multi-user.target" ];
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = "${pkgs.coreutils}/bin/true";
+      RemainAfterExit = true;
+    };
+  };
+}