Merge pull request #264966 from l0b0/test/verify-npmrc-setup

nixos: test `programs.npm.npmrc` setting

nixos/tests/all-tests.nix

@@ -606,6 +606,7 @@ in {
   noto-fonts = handleTest ./noto-fonts.nix {};
   noto-fonts-cjk-qt-default-weight = handleTest ./noto-fonts-cjk-qt-default-weight.nix {};
   novacomd = handleTestOn ["x86_64-linux"] ./novacomd.nix {};
+  npmrc = handleTest ./npmrc.nix {};
   nscd = handleTest ./nscd.nix {};
   nsd = handleTest ./nsd.nix {};
   ntfy-sh = handleTest ./ntfy-sh.nix {};

nixos/tests/npmrc.nix

@@ -0,0 +1,22 @@
+import ./make-test-python.nix ({ ... }:
+let
+  machineName = "machine";
+  settingName = "prefix";
+  settingValue = "/some/path";
+in
+{
+  name = "npmrc";
+
+  nodes."${machineName}".programs.npm = {
+    enable = true;
+    npmrc = ''
+      ${settingName} = ${settingValue}
+    '';
+  };
+
+  testScript = ''
+    ${machineName}.start()
+
+    assert ${machineName}.succeed("npm config get ${settingName}") == "${settingValue}\n"
+  '';
+})