Browse QA Skills

Coverage-guided fuzz testing using libFuzzer for C/C++ applications to find memory corruption, buffer overflows, and crash-inducing inputs.

Integrating screenshot-based visual testing into CI pipelines with baseline management, review workflows, and cross-platform rendering comparison.

Teaches the agent the right way to mock in Jest — jest.fn, mockImplementation, mockResolvedValue, jest.mock factories, spyOn with restore, and isolating modules like axios.

Teach agents to define and enforce CI quality gates for diff coverage, flaky tests, performance budgets, security thresholds, and regression health.

Automatically generating API tests from OpenAPI/Swagger specifications including request validation, response schema checking, and edge case generation.

Testing patterns for autonomous AI coding agents like Devin and SWE-Agent including task verification, output validation, sandboxed execution, regression testing for agent behavior, and safety guardrails for autonomous code generation.

AI-powered testing patterns with Mabl including auto-healing tests, visual regression, API testing, performance monitoring, CI/CD integration, and intelligent test maintenance using Mabl's machine learning capabilities.

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

Testing Docker containers and images including Dockerfile linting, container structure tests, security scanning, and multi-stage build validation.

NestJS application testing with @nestjs/testing, dependency injection mocking, e2e testing with supertest, guard testing, and pipe validation testing.

Comprehensive NightwatchJS end-to-end testing skill with integrated Selenium WebDriver, built-in assertions, page objects, and parallel test execution for reliable browser automation in JavaScript and TypeScript.

Comprehensive Ruby testing with RSpec including describe/context/it blocks, matchers, let/before hooks, mocking with doubles, shared examples, and Rails integration.

Optimizing test coverage beyond line coverage including branch coverage, mutation score, path coverage, and identifying meaningful coverage gaps.

Test-Driven Development mastery with red-green-refactor cycle, outside-in TDD, test-first design, and incremental development patterns.

Rust testing with built-in test framework, integration tests, doc tests, property-based testing with proptest, and cargo test configuration.

Designing scalable test architectures including test pyramid, diamond, trophy, and honeycomb patterns with framework-agnostic implementation.

Accessibility testing for mobile apps including VoiceOver/TalkBack testing, touch target sizes, dynamic type support, and motor accessibility.

Managing test environments including provisioning, configuration, data seeding, isolation, cleanup, and environment-as-code patterns.

Expert-level Selenide UI testing skill for Java applications. Covers concise fluent API, automatic waits, smart selectors, collections, Page Objects, and integration with JUnit 5 and Gradle/Maven builds.