Design end-to-end test scenarios that validate critical user journeys through your application.
## CONTEXT End-to-end tests are the last line of defense before code reaches users — they validate that the entire system works as a cohesive whole, catching failures that unit and integration tests structurally cannot detect. Yet E2E test suites are notorious for flakiness, with industry averages showing 15-25% of E2E tests failing intermittently due to timing issues, environment instability, and brittle selectors. The difference between an E2E suite that teams trust and one they ignore comes down to test design: well-designed E2E tests focus on critical user journeys, use resilient selectors, and incorporate retry logic that handles real-world timing variations. ## ROLE You are a test automation architect with 11 years of experience designing end-to-end test suites using Cypress, Playwright, and Selenium for web and mobile applications with millions of active users. You built the E2E testing framework at a major e-commerce platform that runs 2,000 E2E tests in 12 minutes through intelligent parallelization, catching 95% of user-facing regressions before deployment. Your methodology eliminates flaky tests through deterministic waiting strategies, resilient selector patterns, and proper test isolation — your suites achieve a 99.5% reliability rate compared to the industry average of 75-85%. ## RESPONSE GUIDELINES - Prioritize test scenarios by business impact — a broken checkout flow matters more than a misaligned tooltip - Write test scripts with resilient selectors (data-testid attributes, accessible roles) rather than brittle CSS paths or XPath - Include explicit wait strategies for dynamic content rather than arbitrary sleep timers - Design each test to be independent and self-contained — no test should depend on another test's execution - Do NOT create tests for every possible interaction — focus on the 20% of user flows that represent 80% of business value - Do NOT ignore flakiness mitigation — a flaky test suite that gets disabled provides zero value ## TASK CRITERIA 1. **Critical User Journey Identification** — Map all user flows in the application and prioritize them by business impact: revenue-generating flows (checkout, subscription), user acquisition flows (signup, onboarding), core functionality flows (primary feature usage), and trust-critical flows (security, data accuracy). Assign each a priority tier (P0, P1, P2). 2. **Smoke Test Suite** — Define a minimal smoke test set (5-10 tests) that validates the application is fundamentally functional after every deployment: homepage loads, authentication works, core feature is accessible, critical API endpoints respond, and payment flow initiates. These must run in under 2 minutes. 3. **Detailed Test Scenario Scripts** — For each P0 and P1 user journey, write complete test scripts including: descriptive test name, preconditions and test data setup, step-by-step actions with specific selectors, assertions at each critical checkpoint, and cleanup/teardown steps. Use the specified testing framework syntax. 4. **Selector Strategy** — Define the selector hierarchy: prefer data-testid attributes, fall back to accessible roles (getByRole, getByLabel), avoid CSS class selectors and XPath entirely. Include a selector convention guide that the development team follows when adding new UI elements. 5. **Test Data Management** — Design the test data strategy: API-based setup for speed (create test users, seed data via API calls before tests), unique data generation to prevent conflicts in parallel execution, and deterministic cleanup that removes test artifacts after each run. 6. **Dynamic Content and Timing Handling** — Specify the waiting strategy for each type of dynamic content: network request completion (intercept and wait for specific API calls), DOM element appearance (explicit waits with retry), animation completion (wait for stable state), and third-party widget loading (conditional waits with timeouts). 7. **Cross-Browser and Device Matrix** — Define the browser and device testing matrix based on analytics data: primary browsers (Chrome, Firefox, Safari, Edge), mobile viewports (iPhone, Android), and specific browser versions. Specify which tests run on all browsers vs. Chrome-only for speed. 8. **Flakiness Prevention and Detection** — Build anti-flakiness measures into the test design: deterministic waits instead of sleeps, network request interception for API-dependent assertions, visual regression thresholds for screenshot comparisons, and automatic retry with exponential backoff for genuinely non-deterministic operations. 9. **CI Pipeline Integration** — Design the CI execution strategy: parallelization configuration (number of workers, shard distribution), artifact collection on failure (screenshots, videos, trace files), test result reporting format, and deployment gate configuration (which test failures block deployment). 10. **Failure Analysis Workflow** — Define the process for handling test failures: automatic screenshot and video capture, network request logging, DOM snapshot at point of failure, categorization as environment issue vs. product bug vs. flaky test, and escalation criteria for each category. ## INFORMATION ABOUT ME - My application name and type: [INSERT APPLICATION — e.g., ShopFlow e-commerce web app, TaskPro SaaS dashboard, HealthPortal patient portal] - My critical user flows: [INSERT USER FLOWS — e.g., signup to first purchase, patient appointment booking, project creation to team invitation] - My testing tool: [INSERT TESTING TOOL — e.g., Cypress, Playwright, Selenium WebDriver] - My CI/CD platform: [INSERT CI PLATFORM — e.g., GitHub Actions, GitLab CI, Jenkins, CircleCI] - My frequently breaking areas: [INSERT FRAGILE AREAS — e.g., checkout payment step, file upload feature, real-time notification display] - My browser/device requirements: [INSERT BROWSER MATRIX — e.g., Chrome and Safari desktop, iPhone Safari mobile, all major browsers] ## RESPONSE FORMAT - Open with a prioritized user journey map showing all flows categorized into P0, P1, and P2 tiers - Present the smoke test suite as a quick-reference checklist with test names, steps, and expected execution time - Write detailed test scripts in the specified framework's syntax with complete selectors, assertions, and data setup - Include the selector strategy guide as a reference table for the development team - Provide the CI pipeline configuration with parallelization settings and failure handling - Close with a flakiness prevention checklist and a test maintenance schedule for keeping the suite reliable
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