expect(child.unref).toHaveBeenCalledOnce();

});

it("force-kills Windows child process trees when graceful taskkill fails", async () => {

const child = new EventEmitter() as EventEmitter & {

exitCode: number | null;

kill: ReturnType<typeof vi.fn>;

pid: number;

signalCode: NodeJS.Signals | null;

stderr: { destroy: ReturnType<typeof vi.fn> };

stdin: { destroy: ReturnType<typeof vi.fn> };

stdout: { destroy: ReturnType<typeof vi.fn> };

unref: ReturnType<typeof vi.fn>;

};

child.exitCode = null;

child.kill = vi.fn(() => true);

child.pid = 4450;

child.signalCode = null;

child.stderr = { destroy: vi.fn() };

child.stdin = { destroy: vi.fn() };

child.stdout = { destroy: vi.fn() };

child.unref = vi.fn();

const runTaskkill = vi

.fn()

.mockReturnValueOnce({ error: undefined, status: 1 })

.mockReturnValueOnce({ error: undefined, status: 0 })

.mockReturnValueOnce({ error: undefined, status: 0 });

await expect(

params.stopChild(child as unknown as TChild, {

killGraceMs: 1,

platform: "win32",

runTaskkill,

teardownGraceMs: 1,

}),

).resolves.toEqual({

exitedBeforeTeardown: false,

exitCode: null,

signal: "SIGKILL",

});

expect(runTaskkill).toHaveBeenNthCalledWith(1, "taskkill", ["/PID", "4450", "/T"], {

stdio: "ignore",

});

expect(runTaskkill).toHaveBeenNthCalledWith(2, "taskkill", ["/PID", "4450", "/T", "/F"], {

stdio: "ignore",

});

expect(runTaskkill).toHaveBeenNthCalledWith(3, "taskkill", ["/PID", "4450", "/T", "/F"], {

stdio: "ignore",

});

expect(child.kill).not.toHaveBeenCalled();

});

it.skipIf(process.platform === "win32")(

"preserves pre-teardown wrapper exits while cleaning the process group",

async () => {