how to check if another saga has been yielded

[mb-dmx]

in redux-saga you can write:

function * mySubSaga() {
  yield 1;
}

function * mySaga() {
  yield mySubSaga();
}

seems, that it has same behavior as yield fork(mySubSaga);, but I'm not sure how to expect that mySubSaga has been yielded in the test plan.

Thanks.

[jfairbank]

Hi, @mb-dmx!

If you're using the testSaga function, there isn't a good way to test this, and not a pattern I would like to support. I would favor using fork as it is more explicit what mySaga is doing.

That being said, you can sorta test this with expectSaga, assuming mySubSaga yields an effect like put.

import { put } from 'redux-saga/effects';
import { expectSaga } from 'redux-saga-test-plan';

function* mySubSaga() {
  yield put({ type: 'DONE' });
}

function* mySaga() {
  yield mySubSaga();
}

it('runs mySubSaga', () => {
  return expectSaga(mySaga)
    .put({ type: 'DONE' })
    .run();
});