test(ci): deflake windows npm exec coverage

src/process/exec.test.ts

@@ -1,6 +1,5 @@
 import type { ChildProcess } from "node:child_process";
 import { EventEmitter } from "node:events";
-import fs from "node:fs";
 import process from "node:process";
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { OPENCLAW_CLI_ENV_VALUE } from "../infra/openclaw-exec-env.js";
@@ -120,29 +119,6 @@ describe("runCommandWithTimeout", () => {
       expect(result.code).not.toBe(0);
     },
   );
-
-  it.runIf(process.platform === "win32")(
-    "on Windows spawns node + npm-cli.js for npm argv to avoid spawn EINVAL",
-    async () => {
-      const result = await runCommandWithTimeout(["npm", "--version"], { timeoutMs: 10_000 });
-      expect(result.code).toBe(0);
-      expect(result.stdout.trim()).toMatch(/^\d+\.\d+\.\d+$/);
-    },
-  );
-
-  it.runIf(process.platform === "win32")(
-    "falls back to npm.cmd when npm-cli.js is unavailable",
-    async () => {
-      const existsSpy = vi.spyOn(fs, "existsSync").mockReturnValue(false);
-      try {
-        const result = await runCommandWithTimeout(["npm", "--version"], { timeoutMs: 10_000 });
-        expect(result.code).toBe(0);
-        expect(result.stdout.trim()).toMatch(/^\d+\.\d+\.\d+$/);
-      } finally {
-        existsSpy.mockRestore();
-      }
-    },
-  );
 });
 
 describe("attachChildProcessBridge", () => {

src/process/exec.windows.test.ts

@@ -1,4 +1,6 @@
 import { EventEmitter } from "node:events";
+import fs from "node:fs";
+import path from "node:path";
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
 const spawnMock = vi.hoisted(() => vi.fn());
@@ -124,6 +126,60 @@ describe("windows command wrapper behavior", () => {
     }
   });
 
+  it("spawns node + npm-cli.js for npm argv to avoid direct .cmd execution", async () => {
+    const platformSpy = vi.spyOn(process, "platform", "get").mockReturnValue("win32");
+    const existsSpy = vi.spyOn(fs, "existsSync").mockReturnValue(true);
+    const child = createMockChild({ closeCode: 0, exitCode: 0 });
+
+    spawnMock.mockImplementation(() => child);
+
+    try {
+      const result = await runCommandWithTimeout(["npm", "--version"], { timeoutMs: 1000 });
+      expect(result.code).toBe(0);
+      const captured = spawnMock.mock.calls[0] as SpawnCall | undefined;
+      if (!captured) {
+        throw new Error("expected npm shim spawn");
+      }
+      expect(captured[0]).toBe(process.execPath);
+      expect(captured[1][0]).toBe(
+        path.join(path.dirname(process.execPath), "node_modules", "npm", "bin", "npm-cli.js"),
+      );
+      expect(captured[1][1]).toBe("--version");
+      expect(captured[2].windowsVerbatimArguments).toBeUndefined();
+      expect(captured[2].stdio).toEqual(["inherit", "pipe", "pipe"]);
+    } finally {
+      existsSpy.mockRestore();
+      platformSpy.mockRestore();
+    }
+  });
+
+  it("falls back to npm.cmd when npm-cli.js is unavailable", async () => {
+    const platformSpy = vi.spyOn(process, "platform", "get").mockReturnValue("win32");
+    const existsSpy = vi.spyOn(fs, "existsSync").mockReturnValue(false);
+    const expectedComSpec = process.env.ComSpec ?? "cmd.exe";
+
+    spawnMock.mockImplementation(
+      (_command: string, _args: string[], _options: Record<string, unknown>) => createMockChild(),
+    );
+
+    try {
+      const result = await runCommandWithTimeout(["npm", "--version"], { timeoutMs: 1000 });
+      expect(result.code).toBe(0);
+      const captured = spawnMock.mock.calls[0] as SpawnCall | undefined;
+      if (!captured) {
+        throw new Error("expected npm.cmd fallback spawn");
+      }
+      expect(captured[0]).toBe(expectedComSpec);
+      expect(captured[1].slice(0, 3)).toEqual(["/d", "/s", "/c"]);
+      expect(captured[1][3]).toContain("npm.cmd --version");
+      expect(captured[2].windowsVerbatimArguments).toBe(true);
+      expect(captured[2].stdio).toEqual(["inherit", "pipe", "pipe"]);
+    } finally {
+      existsSpy.mockRestore();
+      platformSpy.mockRestore();
+    }
+  });
+
   it("waits for Windows exitCode settlement after close reports null", async () => {
     const platformSpy = vi.spyOn(process, "platform", "get").mockReturnValue("win32");
     const child = createMockChild({