redux-saga-testing/ava/05.saga-with-input.test.ts

A no-brainer way of testing your Sagas

import sagaHelper from "../helper";
import { put } from "redux-saga/effects";
import avaTest, { Assertions } from "ava";

interface Action {
  type: string;
  payload: string;
}

const someOtherAction = (payload: string) => ({
  type: "SOME_OTHER_ACTION",
  payload,
});

function* mySaga(action: Action): any {
  yield put(someOtherAction(action.payload));
}

const test = sagaHelper(
  mySaga({ type: "SOME_ACTION", payload: "foo" }),
  avaTest
);

test("should trigger the other action with the input action payload", (result, t: Assertions) => {
  t.deepEqual(result, put(someOtherAction("foo")));
});

test("and then nothing", (result, t: Assertions) => {
  t.is(result, undefined);
});