E2E tests exist for the primary user flow

An E2E framework installed in devDependencies with no actual E2E tests is worse than not having one at all — it creates the impression of integration-level coverage that doesn't exist. Playwright, Cypress, and Puppeteer are designed to catch the class of bugs unit tests cannot: routing misconfigurations, broken form submissions, misconfigured auth redirects. A signup flow that works in isolation but fails end-to-end due to a missing CORS header or broken redirect will never be caught by unit tests. ISO-25010:2011 testability requires that critical user journeys be exercised as a system.

Write one E2E test covering the primary user journey. It needs three things: navigation to the starting URL, form interaction, and an assertion on the resulting page state. Add it to e2e/ or tests/e2e/:

// e2e/signup.spec.ts
import { test, expect } from '@playwright/test'

test('new user can sign up and reach dashboard', async ({ page }) => {
  await page.goto('/signup')
  await page.fill('input[name=email]', 'new@example.com')
  await page.fill('input[name=password]', 'P@ssw0rd123')
  await page.click('button[type=submit]')
  await expect(page).toHaveURL('/dashboard')
  await expect(page.getByRole('heading', { name: 'Dashboard' })).toBeVisible()
})