How to use the @redux-saga/is.task function in @redux-saga/is

actual = args
  }

  const middleware = sagaMiddleware()

  try {
    middleware.run(function*() {})
  } catch (e) {
    // middleware.run must throw an Error when executed before the middleware is connected to a Store
    expect(e instanceof Error).toBe(true)
  }

  createStore(() => {}, applyMiddleware(middleware))
  const task = middleware.run(saga, 'argument') // middleware.run must return a Task Object

  expect(is.task(task)).toBe(true)
  const expected = ['argument'] // middleware must run the Saga and provides it with the given arguments

  expect(actual).toEqual(expected)
})

function resolveEffect(effectId, result) {
  const effect = manager.get(effectId);

  if (is.task(result)) {
    result.toPromise().then(
      taskResult => {
        if (result.isCancelled()) {
          cancelEffect(effectId);
        } else {
          resolveEffect(effectId, taskResult);
        }
      },
      taskError => rejectEffect(effectId, taskError)
    );
  } else {
    computeEffectDur(effect);
    effect.status = RESOLVED;
    effect.result = result;
    if (isRaceEffect(effect.effect)) {
      setRaceWinner(effectId, result);

function resolveEffect(effectId, result) {
  const effect = manager.get(effectId)

  if (is.task(result)) {
    result.toPromise().then(
      taskResult => {
        if (result.isCancelled()) {
          cancelEffect(effectId)
        } else {
          resolveEffect(effectId, taskResult)
        }
      },
      taskError => rejectEffect(effectId, taskError),
    )
  } else {
    computeEffectDur(effect)
    effect.status = RESOLVED
    effect.result = result
    if (isRaceEffect(effect.effect)) {
      setRaceWinner(effectId, result)