Function writer

apps/kimi-code/test/cli/run-prompt.test.ts:145–155

(columns?: number)

}

function writer(columns?: number) {
  let text = '';
  return {
    columns,
    write: vi.fn((chunk: string) => {
      text += chunk;
      return true;
    }),
    text: () => text,
  };
}

function fakeProcess() {
  const listeners = new Map<NodeJS.Signals, () => Promise<void> | void>();