test(security): isolate windows acl user fallback

src/security/windows-acl.test.ts

@@ -2,24 +2,8 @@ import { beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
 import type { WindowsAclEntry, WindowsAclSummary } from "./windows-acl.js";
 
 const MOCK_USERNAME = "MockUser";
-const userInfoMock = vi.hoisted(() =>
-  vi.fn(() => ({
-    username: MOCK_USERNAME,
-    uid: -1,
-    gid: -1,
-    shell: "C:\\Windows\\System32\\cmd.exe",
-    homedir: "C:\\Users\\MockUser",
-  })),
-);
-
-vi.mock("node:os", async () => {
-  const { mockNodeBuiltinModule } = await import("openclaw/plugin-sdk/test-node-mocks");
-  return mockNodeBuiltinModule(
-    () => vi.importActual<typeof import("node:os")>("node:os"),
-    { userInfo: userInfoMock as unknown as typeof import("node:os").userInfo },
-    { mirrorToDefault: true },
-  );
-});
+const mockUserInfo = () => ({ username: MOCK_USERNAME });
+const emptyUserInfo = () => ({ username: "" });
 
 let createIcaclsResetCommand: typeof import("./windows-acl.js").createIcaclsResetCommand;
 let formatIcaclsResetCommand: typeof import("./windows-acl.js").formatIcaclsResetCommand;
@@ -125,7 +109,7 @@ describe("windows-acl", () => {
     it("falls back to os.userInfo when USERNAME is empty", () => {
       // When USERNAME env is empty, falls back to os.userInfo().username
       const env = { USERNAME: "", USERDOMAIN: "WORKGROUP" };
-      const result = resolveWindowsUserPrincipal(env);
+      const result = resolveWindowsUserPrincipal(env, mockUserInfo);
       // Should return a username (from os.userInfo fallback) with WORKGROUP domain
       expect(result).toBe(`WORKGROUP\\${MOCK_USERNAME}`);
     });
@@ -653,6 +637,7 @@ Successfully processed 1 files`;
       const result = formatIcaclsResetCommand("C:\\test\\file.txt", {
         isDir: false,
         env: {},
+        userInfo: mockUserInfo,
       });
       // Should contain the actual system username from os.userInfo
       expect(result).toContain(`"${MOCK_USERNAME}:F"`);
@@ -678,6 +663,7 @@ Successfully processed 1 files`;
       const result = createIcaclsResetCommand("C:\\test\\file.txt", {
         isDir: false,
         env: {},
+        userInfo: mockUserInfo,
       });
       // Should return a valid command using the system username
       expect(result).not.toBeNull();
@@ -717,17 +703,10 @@ Successfully processed 1 files`;
     });
 
     it("returns null when no username can be resolved (line 348)", () => {
-      // Temporarily make os.userInfo().username empty so resolveWindowsUserPrincipal returns null
-      userInfoMock.mockReturnValueOnce({
-        username: "",
-        uid: -1,
-        gid: -1,
-        shell: "",
-        homedir: "",
-      });
       const result = createIcaclsResetCommand("C:\\test\\file.txt", {
         isDir: false,
         env: { USERNAME: "", USERDOMAIN: "" },
+        userInfo: emptyUserInfo,
       });
       expect(result).toBeNull();
     });

src/security/windows-acl.ts

@@ -22,6 +22,14 @@ export type WindowsAclSummary = {
   error?: string;
 };
 
+export type WindowsUserInfoProvider = () => { username?: string | null };
+
+export type IcaclsResetCommandOptions = {
+  isDir: boolean;
+  env?: NodeJS.ProcessEnv;
+  userInfo?: WindowsUserInfoProvider;
+};
+
 const INHERIT_FLAGS = new Set(["I", "OI", "CI", "IO", "NP"]);
 const WORLD_PRINCIPALS = new Set([
   "everyone",
@@ -66,14 +74,18 @@ const STATUS_PREFIXES = [
 ];
 
 const normalize = (value: string) => normalizeLowercaseStringOrEmpty(value);
+const defaultWindowsUserInfo: WindowsUserInfoProvider = () => os.userInfo();
 
 function normalizeSid(value: string): string {
   const normalized = normalize(value);
   return normalized.startsWith("*") ? normalized.slice(1) : normalized;
 }
 
-export function resolveWindowsUserPrincipal(env?: NodeJS.ProcessEnv): string | null {
-  const username = env?.USERNAME?.trim() || os.userInfo().username?.trim();
+export function resolveWindowsUserPrincipal(
+  env?: NodeJS.ProcessEnv,
+  userInfo: WindowsUserInfoProvider = defaultWindowsUserInfo,
+): string | null {
+  const username = env?.USERNAME?.trim() || userInfo().username?.trim();
   if (!username) {
     return null;
   }
@@ -361,18 +373,18 @@ export function formatWindowsAclSummary(summary: WindowsAclSummary): string {
 
 export function formatIcaclsResetCommand(
   targetPath: string,
-  opts: { isDir: boolean; env?: NodeJS.ProcessEnv },
+  opts: IcaclsResetCommandOptions,
 ): string {
-  const user = resolveWindowsUserPrincipal(opts.env) ?? "%USERNAME%";
+  const user = resolveWindowsUserPrincipal(opts.env, opts.userInfo) ?? "%USERNAME%";
   const grant = opts.isDir ? "(OI)(CI)F" : "F";
   return `icacls "${targetPath}" /inheritance:r /grant:r "${user}:${grant}" /grant:r "*S-1-5-18:${grant}"`;
 }
 
 export function createIcaclsResetCommand(
   targetPath: string,
-  opts: { isDir: boolean; env?: NodeJS.ProcessEnv },
+  opts: IcaclsResetCommandOptions,
 ): { command: string; args: string[]; display: string } | null {
-  const user = resolveWindowsUserPrincipal(opts.env);
+  const user = resolveWindowsUserPrincipal(opts.env, opts.userInfo);
   if (!user) {
     return null;
   }