Cypress commands for populating Firebase Auth and Firestore emulators with data during test

commands.ts

// support/commands.ts
import { getAuth, connectAuthEmulator, signInWithEmailAndPassword } from "firebase/auth";
import firebase = require("firebase/compat");

const firebaseConfig = {<your-config}

firebase.default.initializeApp(firebaseConfig);

const auth = getAuth();
connectAuthEmulator(auth, "http://localhost:9099");

const db = firebase.default.firestore();
db.settings({
  ssl: false,
  experimentalForceLongPolling: true,
  merge: true
});
db.useEmulator('127.0.0.1', 4001);

const authUrl = "http://localhost:9099/identitytoolkit.googleapis.com/v1/accounts:signUp?key=bob";

Cypress.Commands.add("createAuthUser", async(displayName, email, password) => {
  await createAuthUser(displayName, email, password);
});

Cypress.Commands.add("createTestUser", async(authEmail, authPassword, uuid, email, displayName) => {
  await createTestUser(authEmail, authPassword, uuid, email, displayName);
});

/*
 * create user in auth emulator
*/
async function createAuthUser(displayName, email, password) {
  await fetch(authUrl, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      displayName, email, password
    })
  })
  .then((response) => response.json())
  .then((user) => {
    console.log("created user", user);
  });
}

/*
* Adds user entry to users collection in firestore emulator
*/
function createTestUser(authEmail, authPassword, uuid, email, displayName) {
  return signInWithEmailAndPassword(auth, authEmail, authPassword).then((user) => {
    const usrDoc = {uuid, email, displayName, emailVerified: true}
    db.collection('users').doc(uuid).set(usrDoc);
  })
}

my.spec.ts

beforeEach(() => {
  // create a user that can be used as main user for tests
  cy.createAuthUser("bob", "bob@bob.com", "bobby1234");
  cy.createTestUser("bob@bob.com", "bobby1234", testUid, "teddy@bob.com", "teddy");
  
  cy.intercept('POST', 'https://identitytoolkit.googleapis.com/v1/**/*', () => {
    console.log("intercepted.");
  });
});