Cypress using actions from Pinia Vue3 - cypress

Question

I was learning some cypress from this video: https://www.youtube.com/watch?v=03kG2rdJYtc
I'm interested with he's saying at 29:33: "programatic login"
But he's using vue2 and Vuex.
My project is created with Vite and the state management is Pinia.
So how can I do a programatic login using the pinia action?
For example the welcome logged in user should see dashboard:
describe('Welcome', () => {
it('logged in user should visit dashboard', () => {
// login
cy.visit('/')
cy.url().should('contain', '/dashboard')
})
})
And my userStore:
export const useUserStore = defineStore({
id: 'user',
state: () => ({
username: ref(useLocalStorage('username', null)),
}),
getters: {
isLoggedIn: (state) => state.username !== null,
},
actions: {
login(username, password) {
return useAuthLoginService(username, password)
.then((response) => {
this.username = response.username
})
.catch((error) => {
return Promise.reject(new Error(error))
})
},
},
})
How can I call the login action on the cypress test?
For now as a workaround I'm writing on a localstorage like:
localStorage.setItem('username', 'user')
And it works fine, because userStore catch this item from localstorage and passes like it's logged in... But I don't like this solution, seems fragile, and I'd like to use the action which is made for login users.
Another thing I tried is adding the app variable inside window but it doesn't work for me... don't understand why...
on main.js
The video shows that code:
const vue = new Vue({...})
if(window.Cypress){
window.app = app
}
In my case it's:
const app = createApp(App)
if(window.Cypress){
window.app = app
}
But in cypress tests the window.app it's undefined... I don't know how I would access to userStore using this... like it was vuex.

Answer 1

Using the Pinia demo app as an example:
The store is initialized in App.vue. Add a reference to the newly created store(s) for Cypress to use
export default defineComponent({
components: { Layout, PiniaLogo },
setup() {
const user = useUserStore()
const cart = useCartStore()
if (window.Cypress) {
window.store = {user, cart) // test can see window.store
}
...
In the test
let store;
describe('Pinia demo with counters', () => {
beforeEach(() => {
cy.viewport(1000, 1000)
cy.visit(`http://localhost:${PORT}`)
.then(win => store = win.store) // get app's store object
})
it('works', () => {
cy.wait(500) // wait for the JS to load
.then(() => store.cart.addItem('Cypress test item')) // invoke action
.then(() => {
const item1 = store.cart.items[0] // invoke getter
cy.wrap(item1)
.should('have.property', 'name', 'Cypress test item') // passes
})
The login action is asynchronous, so return the promise to allow Cypress to wait.
// user.js
async login(user, password) {
const userData = await apiLogin(user, password)
this.$patch({
name: user,
...userData,
})
return userData // this returns a promise which can awaited
},
// main.spec.js
describe('Pinia demo with counters', () => {
beforeEach(() => {
cy.viewport(1000, 1000)
cy.visit(`http://localhost:${PORT}`).then(win => {
store = win.store
// default name in store before login
cy.wrap(store.user.name).should('eq', 'Eduardo')
// logging in
store.user.login('ed', 'ed').then(() => { // wait for API call
cy.wrap(store.user.name).should('eq', 'ed')
})
})
})
Alternatively, wait for the name to change on the page
// main.spec.js
cy.visit(`http://localhost:${PORT}`).then(win => {
store = win.store
// default name in store
cy.wrap(store.user.name).should('eq', 'Eduardo')
// logging on
store.user.login('ed', 'ed')
cy.contains('Hello ed') // waits for name on page to change
.then(() => {
cy.wrap(store.user.name).should('eq', 'ed')
})
})