E2E Testing Skills for AI Agents

Comprehensive Playwright end-to-end testing patterns with Page Object Model, fixtures, and best practices

Automate Chrome browser interactions via CLI with persistent daemon mode. Navigate pages, extract content, click elements, type text, manage tabs, and take screenshots.

Cypress end-to-end testing with custom commands, intercepts, and component testing

Browser automation tool by Vercel Labs enabling programmatic web interaction. Navigate URLs, capture interactive elements with refs, fill forms, take screenshots, generate PDFs, and run parallel sessions.

Headless Chrome automation with Puppeteer for web scraping, PDF generation, and E2E testing

Advanced Selenium WebDriver framework with three Page Object Model patterns (Basic POM, Improved POM, Page Factory), retry mechanisms, Allure reporting, Excel data-driven testing, and Selenoid grid support.

Simple mobile UI testing with YAML flows for iOS and Android without complex setup

Selenium WebDriver with Java using Page Object Model and TestNG

Gray box E2E testing for React Native apps on iOS and Android simulators

Test data strategies using Faker.js, factories, builders, and database seeding

Testing CI/CD pipeline configurations including build validation, deployment verification, rollback testing, and pipeline-as-code quality checks.

Testing GraphQL subscriptions including WebSocket lifecycle, real-time event delivery, authorization on subscriptions, and connection management.

Cross-browser E2E testing with WebdriverIO, Cucumber integration, and visual regression

Visual regression testing with Playwright screenshots and diff comparison

Integration testing with Sentry for error tracking, performance monitoring, and release health verification in production environments.

Safe testing-in-production strategies including feature flags, shadow traffic, canary releases, dark launches, and observability-driven development.

Comprehensive WCAG 2.1 AA compliance testing combining automated axe-core scans with manual keyboard navigation, screen reader compatibility, and focus management verification

Comprehensive end-to-end testing methodologies and best practices covering architecture, test design, data management, flakiness prevention, and cross-browser strategies.

Flutter app testing with widget tests, integration tests, golden tests, Mockito, bloc testing, and Flutter Driver for end-to-end scenarios.

Android UI testing framework with synchronization, view matchers, and actions

Exhaustive testing of form validation logic including boundary values, injection payloads, encoding edge cases, and client-server validation bypass techniques

CLI tool for persistent browser automation with multi-session support, featuring Chromium/Real/Remote browser modes, cookie management, JavaScript execution, and long-running automation workflows.

End-to-end testing for React Native apps using Detox with gray-box testing, synchronization, device simulation, and CI integration.

Comprehensive authentication testing including login flows, password policies, MFA, session management, account lockout, and SSO integration.

Building effective smoke test suites for deployment verification including critical path coverage, health endpoints, and rapid feedback testing.

Cross-platform desktop and application screenshot capture for visual testing, UI verification, and automated visual comparison across macOS, Linux, and Windows.

Design and maintain lightweight production smoke test suites that verify critical user journeys, API health, and infrastructure availability after deployments

Simulate aggressive user behavior patterns including rapid clicking, random navigation, form abuse, tab spamming, and unexpected interaction sequences to find UI resilience issues

Native iOS UI testing with Swift and Xcode Test Navigator integration

Detect, quarantine, and systematically fix flaky tests with automated retry analysis, root cause categorization, and CI pipeline integration for test reliability

Automated screenshot comparison testing with configurable thresholds, anti-aliasing tolerance, and responsive viewport visual validation.

Testing real-time collaborative features including conflict resolution, CRDT validation, cursor presence, and concurrent editing scenarios.

Parallel test execution with Selenium Grid including hub/node configuration, Docker-based grid, cross-browser testing, and session management.

Search feature testing including relevance scoring, autocomplete, typo tolerance, faceted search, pagination, and search analytics verification.

Testing browser extensions including content script injection, background worker testing, popup UI testing, storage API testing, and cross-browser compatibility.

Advanced debugging patterns for test failures covering root cause analysis, flakiness investigation, performance debugging, and systematic troubleshooting methodologies.

Automated detection and reporting of broken links, missing resources, and orphaned pages across web applications using crawl-based and DOM-based strategies

Node.js E2E testing framework with TypeScript support, smart assertions, and parallel execution

Payment gateway testing including Stripe, PayPal, and Square integration testing with sandbox environments, webhook verification, and error handling.

Testing feature flag implementations including flag evaluation, gradual rollout verification, fallback behavior, and flag cleanup detection.

Build reusable test data factories with builder patterns, realistic fake data generation, relationship handling, and database seeding for consistent test environments

Rails application testing with RSpec, FactoryBot, Capybara, system tests, request specs, model specs, and Rails-specific testing conventions.

Mobile app testing automation for iOS and Android with Appium

Scalable mobile testing using cloud device farms like AWS Device Farm, BrowserStack, and Firebase Test Lab for cross-device compatibility.

Laravel PHP testing with PHPUnit, feature tests, browser tests with Dusk, database factories, mocking facades, and HTTP testing helpers.

Detect and reproduce race conditions in web applications including double submissions, concurrent state mutations, and timing-dependent UI bugs

Systematically detect, capture, and categorize browser console errors, warnings, and unhandled exceptions during automated test execution

Configure and generate rich Allure test reports with test categorization, historical trends, environment details, and CI/CD integration for comprehensive test visibility

Testing in ephemeral preview environments for pull requests including environment provisioning, data seeding, and automated teardown.

Detect timezone-related bugs including incorrect date conversions, DST edge cases, locale formatting issues, and UTC offset miscalculations across application layers

Network-level testing with Playwright including request interception, response mocking, network throttling, and HAR recording/replay.

Behavior-driven development with Cucumber, Gherkin, and step definitions

Identify and diagnose memory leaks in web applications through heap analysis, DOM node counting, detached element detection, and performance profiling

Validate error boundary implementations in React and other frameworks ensuring graceful degradation, proper fallback UI rendering, and error recovery flows

Evaluate search functionality quality including relevance ranking, typo tolerance, faceted filtering, autocomplete accuracy, and zero-results handling

Generate and maintain visual regression screenshot baselines with intelligent diffing, responsive breakpoint coverage, and dynamic content masking strategies

Validating A/B test implementations including traffic splitting accuracy, statistical significance calculation, metric tracking, and experiment cleanup.

Testing augmented and virtual reality applications including spatial tracking, gesture recognition, performance on headsets, and motion sickness testing.

Verify loading states, skeleton screens, spinners, and progress indicators across all data-fetching scenarios including slow networks, errors, and partial loads

Test touch interactions and mobile gestures including swipe, pinch-zoom, long-press, drag-and-drop, pull-to-refresh, and multi-touch behaviors across mobile viewports

Generate comprehensive test plans with coverage matrices and risk-based testing

Kubernetes deployment testing including manifest validation, Helm chart testing, pod health checks, network policy testing, and rollback verification.

Automatically generate regression test cases from bug reports and incident post-mortems to prevent previously fixed defects from recurring

Detect localization and internationalization defects including untranslated strings, text expansion overflow, RTL layout issues, and locale-specific formatting errors

Test WebSocket connections for reliability including reconnection logic, message ordering, heartbeat mechanisms, and connection state management under adverse conditions

Systematically test responsive web layouts across viewports, detecting overflow, text truncation, overlapping elements, and broken grid layouts

Identify and log user experience friction points including excessive clicks, confusing navigation, slow interactions, and workflow bottlenecks through automated heuristic analysis

Validate the first-time user experience including onboarding flows, empty states, tutorial completion, progressive disclosure, and initial setup wizards

Testing desktop applications built with Electron, Tauri, or native frameworks including window management, IPC, tray icons, and auto-update testing.

Behavior-Driven Development with Gherkin syntax, step definitions, scenario outlines, data tables, and living documentation generation.

Email delivery testing including content verification, rendering across clients, spam score checking, link validation, and transactional email workflow testing.

i18n testing covering locale switching, date/number formatting, RTL layout, plural forms, ICU messages, and translation completeness verification.

Identify stale cache issues across browser cache, CDN layers, API response caching, and application-level caches that cause users to see outdated content

Generate structured exploratory testing charters with focused missions, time-boxed sessions, risk-based areas, and standardized note-taking templates for systematic exploration

Analyze web application interfaces for cognitive overload using automated heuristics covering information density, choice complexity, visual hierarchy, and interaction patterns

Detect visual defects in dark mode implementations including contrast issues, hardcoded colors, missing theme tokens, and inconsistent component theming

Validate progressive web app offline functionality including service worker caching, offline data persistence, sync-on-reconnect behavior, and graceful degradation

Advanced Playwright automation with auto-detection, custom fixtures, trace debugging, visual testing, mobile emulation, and production-grade test architecture.

Audit empty states across web applications ensuring proper messaging, helpful CTAs, illustration rendering, and graceful handling when data is unavailable

Audit error messages across web applications for clarity, helpfulness, consistency, localization readiness, and security information leakage

Enforces rigorous verification evidence before any claims of task completion, preventing false positives, untested deployments, and premature celebration with a structured gate function.

Anthropic's official web application testing skill using native Python Playwright scripts with helper utilities for server lifecycle management, browser automation, and comprehensive E2E testing workflows.

Test notification systems for spam behavior including duplicate alerts, missing throttling, incorrect delivery channels, and notification preference violations

Systematic dark mode testing covering color contrast, theme switching, persistence, media query respect, component-level theming, and image adaptation.

End-to-end database testing with test containers, data seeding, cleanup strategies, transaction isolation, and production data anonymization.

Comprehensive WCAG compliance and accessibility testing covering ARIA, keyboard navigation, screen readers, color contrast, and automated a11y validation.

IoT device testing including firmware validation, protocol testing (MQTT, CoAP), power consumption testing, and over-the-air update verification.

Testing voice-activated applications including speech recognition accuracy, intent detection, dialog flow testing, and multi-language support.

Automated responsive design testing across breakpoints, viewports, and devices with visual comparison and layout verification.

Synthetic monitoring test creation for uptime checking, user journey simulation, API health verification, and multi-region availability testing.

Automated cross-browser testing across Chrome, Firefox, Safari, and Edge with visual comparison, feature detection, and polyfill verification.

Next.js application testing covering Server Components, App Router, API routes, middleware, dynamic routes, and SSR/SSG testing patterns.

Enterprise-grade Playwright test automation framework using 8-layer architecture with Page Object Model, Module Pattern, custom fixtures, API testing layer, structured logging, data generators, multi-browser support, Docker, CI/CD pipelines, and custom HTML reporting.

Canary deployment validation testing including traffic splitting, metric comparison, automatic rollback triggers, and health score calculation.

CLI-first browser automation using Playwright CLI for navigation, form filling, snapshots, screenshots, data extraction, and UI-flow debugging from the terminal.

Visual regression testing with Playwright including screenshot comparison, pixel-diff thresholds, dynamic content masking, and cross-browser visual validation.

WebSocket testing including connection lifecycle, reconnection logic, message ordering, backpressure handling, and binary frame testing.