oil-formula-calculator/frontend/cypress/e2e/favorites.cy.js

describe('Favorites System', () => {
  let adminToken
  let authHeaders

  before(() => {
    cy.getAdminToken().then(token => {
      adminToken = token
      authHeaders = { Authorization: `Bearer ${token}` }
    })
  })

  describe('API Level', () => {
    let firstRecipeId

    before(() => {
      cy.getAdminToken().then(token => {
        cy.request({ url: '/api/recipes', headers: { Authorization: `Bearer ${token}` } }).then(res => {
          if (res.body.length > 0) {
            firstRecipeId = res.body[0].id
          }
        })
      })
    })

    it('can add a favorite via API', () => {
      if (!firstRecipeId) return // skip if no recipes
      cy.request({
        method: 'POST',
        url: `/api/favorites/${firstRecipeId}`,
        headers: authHeaders,
        body: {}
      }).then(res => {
        expect(res.status).to.be.oneOf([200, 201])
      })
    })

    it('lists the favorite', () => {
      if (!firstRecipeId) return
      cy.request({
        url: '/api/favorites',
        headers: authHeaders
      }).then(res => {
        expect(res.body).to.include(firstRecipeId)
      })
    })

    it('can remove the favorite via API', () => {
      if (!firstRecipeId) return
      cy.request({
        method: 'DELETE',
        url: `/api/favorites/${firstRecipeId}`,
        headers: authHeaders
      }).then(res => {
        expect(res.status).to.eq(200)
      })
    })

    it('favorite is removed from list', () => {
      if (!firstRecipeId) return
      cy.request({
        url: '/api/favorites',
        headers: authHeaders
      }).then(res => {
        expect(res.body).to.not.include(firstRecipeId)
      })
    })
  })

  describe('UI Level', () => {
    it('recipe cards have favorite buttons for logged-in users', () => {
      cy.visit('/', {
        onBeforeLoad(win) {
          win.localStorage.setItem('oil_auth_token', adminToken)
        }
      })
      cy.get('.recipe-card', { timeout: 10000 }).should('have.length.gte', 1)
      // Fav button should be present on cards
      cy.get('.fav-btn').first().should('exist')
    })
  })
})