1 files changed, 42 insertions, 0 deletions
diff --git a/nixpkgs/lib/tests/modules/doRename-condition.nix b/nixpkgs/lib/tests/modules/doRename-condition.nix
new file mode 100644
index 000000000000..c08b3035be6f
--- /dev/null
+++ b/nixpkgs/lib/tests/modules/doRename-condition.nix
@@ -0,0 +1,42 @@
+/*
+  Simulate a migration from a single-instance `services.foo` to a multi instance
+  `services.foos.<name>` module, where `name = ""` serves as the legacy /
+  compatibility instance.
+
+  - No instances must exist, unless one is defined in the multi-instance module,
+  or if the legacy enable option is set to true.
+  - The legacy instance options must be renamed to the new instance, if it exists.
+
+  The relevant scenarios are tested in separate files:
+  - ./doRename-condition-enable.nix
+  - ./doRename-condition-no-enable.nix
+ */
+{ config, lib, ... }:
+let
+  inherit (lib) mkOption mkEnableOption types doRename;
+in
+{
+  options = {
+    services.foo.enable = mkEnableOption "foo";
+    services.foos = mkOption {
+      type = types.attrsOf (types.submodule {
+        options = {
+          bar = mkOption { type = types.str; };
+        };
+      });
+      default = { };
+    };
+    result = mkOption {};
+  };
+  imports = [
+    (doRename {
+      from = [ "services" "foo" "bar" ];
+      to = [ "services" "foos" "" "bar" ];
+      visible = true;
+      warn = false;
+      use = x: x;
+      withPriority = true;
+      condition = config.services.foo.enable;
+    })
+  ];
+}