Jest and Flow

[rsallar]

Hi guys, having a problem when trying to test a flow function in a store.
The second test below throws an error but this.errorMsg doesn't get updated.
Any hint? Thanks!

The Store

export class AuthStore {
    errorMsg = ""
    constructor() {
        makeAutoObservable(this, { });
    }

   *signIn(email: string, pwd: string) {
        try {
            yield auth.signInWithEmailAndPassword(email, pwd);     
        } catch (err) {
            if (err.code === 'auth/wrong-password') {
                this.errorMsg="abc";
            }
            else if(err.code === 'auth/user-not-found'){
                this.errorMsg="def";
            } else {
                throw err;
            }
        }
    }
}

The Test

import { AuthStore } from "../AuthStore";
import { auth } from "../firebase/firebaseConfig";

jest.mock('../firebase/firebaseConfig', () => {
  return {
    auth: {},
    dataPoint:()=>{}  
  }; 
});

describe("Auth Store Login", () => {
   /*WORKS*/
    it("checks if called with right user / pass ", async () => {
      auth.signInWithEmailAndPassword = jest.fn();
      const store = new AuthStore(null);
      store.signIn("user", "pwd");
      expect(auth.signInWithEmailAndPassword).toBeCalledWith("user", "pwd");
    });
    /*DOES NOT WORK*/
    it("captures user-not-found error", async () => {
      const store = new AuthStore(null);
      auth.signInWithEmailAndPassword = jest.fn().mockRejectedValue({code:"auth/wrong-password"});  
      const gen = store.signIn("user", "pwd");
      expect(store.errorMsg).toStrictEqual("abc");   
    });
  });

JEST error

Auth Store Login > captures user-not-found error
-----
Error: expect(received).toStrictEqual(expected) // deep equality

Expected: "abc"
Received: ""

[urugator]

flow returns promise ... you have to await await store.signIn("user", "pwd") prior expect(store.errorMsg).toStrictEqual("abc");

[rsallar]

It worked. So simple. Thank you very much.