function createStubPty(pid = 1234) {

let exitListener: ((event: { exitCode: number; signal?: number }) => void) | null = null;

const disposeData = vi.fn();

const disposeExit = vi.fn();

return {

pid,

write: vi.fn(),

onData: vi.fn(() => ({ dispose: vi.fn() })),

onData: vi.fn(() => ({ dispose: disposeData })),

onExit: vi.fn((listener: (event: { exitCode: number; signal?: number }) => void) => {

exitListener = listener;

return { dispose: vi.fn() };

return { dispose: disposeExit };

}),

kill: (signal?: string) => ptyKillMock(signal),

emitExit: (event: { exitCode: number; signal?: number }) => {

exitListener?.(event);

},

disposeData,

disposeExit,

};

}

await expect(adapter.wait()).resolves.toEqual({ code: 3, signal: null });

});

it("disposes PTY listeners", async () => {

const stub = createStubPty();

spawnMock.mockReturnValue(stub);

const adapter = await createPtyAdapter({

shell: "bash",

args: ["-lc", "echo ok"],

});

adapter.onStdout(() => undefined);

adapter.dispose();

expect(stub.disposeData).toHaveBeenCalledTimes(1);

expect(stub.disposeExit).toHaveBeenCalledTimes(1);

});

it("keeps inherited env when no override env is provided on non-Linux", async () => {

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

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