Function expectKilled

__tests__/liveness-watchdog.test.ts:89–91

(r: { code: number | null; signal: NodeJS.Signals | 'TIMEOUT' | null })

  // signal=null with a non-zero exit code. Either is a kill; the synthetic
  // 'TIMEOUT' (the watchdog never fired) is the failure we're guarding against.
  function expectKilled(r: { code: number | null; signal: NodeJS.Signals | 'TIMEOUT' | null }): void {
    expect(r.signal === 'SIGKILL' || (r.signal === null && r.code !== 0 && r.code !== null)).toBe(true);
  }

  it('SIGKILLs a process whose main thread wedges in a sync loop', async () => {
    const r = await runChild(