oil-formula-calculator/frontend/cypress/e2e/registration-flow.cy.js

describe('Registration Flow', () => {
  let adminToken
  let authHeaders
  const TEST_USER = 'cypress_test_register_' + Date.now()

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

  it('can register a new user via API', () => {
    cy.request({
      method: 'POST', url: '/api/register',
      body: { username: TEST_USER, password: 'test1234' },
      failOnStatusCode: false
    }).then(res => {
      if (res.status === 200 || res.status === 201) {
        expect(res.body).to.have.property('token')
      }
    })
  })

  it('registered user can authenticate', () => {
    cy.request({
      method: 'POST', url: '/api/login',
      body: { username: TEST_USER, password: 'test1234' },
      failOnStatusCode: false
    }).then(res => {
      if (res.status === 200) {
        expect(res.body).to.have.property('token')
        expect(res.body.token).to.be.a('string')
      }
    })
  })

  it('rejects duplicate username', () => {
    cy.request({
      method: 'POST', url: '/api/register',
      body: { username: TEST_USER, password: 'another123' },
      failOnStatusCode: false
    }).then(res => {
      if (res.status !== 404) {
        expect(res.status).to.be.oneOf([400, 409, 422])
      }
    })
  })

  after(() => {
    // Cleanup: delete test user via admin
    cy.request({ url: '/api/users', headers: authHeaders, failOnStatusCode: false }).then(res => {
      if (res.status === 200) {
        const testUser = res.body.find(u => u.username === TEST_USER)
        if (testUser) {
          cy.request({ method: 'DELETE', url: `/api/users/${testUser.id}`, headers: authHeaders, failOnStatusCode: false })
        }
      }
    })
  })
})