}

});

it("force-kills timed Windows commands with taskkill when graceful taskkill fails", async () => {

vi.useFakeTimers();

const platformDescriptor = Object.getOwnPropertyDescriptor(process, "platform");

Object.defineProperty(process, "platform", { value: "win32", configurable: true });

try {

const child = Object.assign(new FakeCommandChild(), { pid: 12345 });

const taskkillImpl = vi

.fn()

.mockReturnValueOnce({ status: 1 })

.mockImplementationOnce(() => {

queueMicrotask(() => child.emit("exit", null, "SIGTERM"));

return { status: 0 };

});

const runPromise = probeTesting.runCommand("fake-command", ["install"], {

spawnImpl: (() => child) as unknown as typeof import("node:child_process").spawn,

taskkillImpl,

timeoutKillGraceMs: 100,

timeoutMs: 10,

});

const runError = runPromise.catch((error: unknown) => error);

await vi.advanceTimersByTimeAsync(10);

expect(taskkillImpl).toHaveBeenNthCalledWith(1, "taskkill", ["/PID", "12345", "/T"], {

stdio: "ignore",

windowsHide: true,

});

expect(taskkillImpl).toHaveBeenNthCalledWith(2, "taskkill", ["/PID", "12345", "/T", "/F"], {

stdio: "ignore",

windowsHide: true,

});

expect(child.signals).toEqual([]);

const error = await runError;

expect(error).toBeInstanceOf(Error);

expect((error as Error).message).toBe("fake-command install timed out after 10ms");

} finally {

if (platformDescriptor) {

Object.defineProperty(process, "platform", platformDescriptor);

}

vi.useRealTimers();

}

});

it("keeps fallback SIGKILL armed for ignored-stdio descendants", async () => {

if (process.platform === "win32") {

return;