Testing & Security

Testing Spring application events (ApplicationEvent) with @EventListener and ApplicationEventPublisher. Test event publishing, listening, and async event handling in Spring Boot applications. Use when validating event-driven workflows in your Spring Boot services.

Parameterized testing patterns with @ParameterizedTest, @ValueSource, @CsvSource. Run single test method with multiple input combinations. Use when testing multiple scenarios with similar logic.

Core Node.js backend patterns for TypeScript applications including async/await error handling, middleware concepts, configuration management, testing strategies, and layered architecture principles. Use when building Node.js backend services, APIs, or microservices.

JWT authentication and authorization patterns for Spring Boot 3.5.x covering token generation with JJWT, Bearer/cookie authentication, database/OAuth2 integration, and RBAC/permission-based access control using Spring Security 6.x.

Unit testing Jakarta Bean Validation (@Valid, @NotNull, @Min, @Max, etc.) with custom validators and constraint violations. Test validation logic without Spring context. Use when ensuring data integrity and validation rules are correct.

Implement persistence layers with Spring Data JPA. Use when creating repositories, configuring entity relationships, writing queries (derived and @Query), setting up pagination, database auditing, transactions, UUID primary keys, multiple databases, and database indexing. Covers repository interfaces, JPA entities, custom queries, relationships, and performance optimization patterns.

Configure Spring Boot Actuator for production-grade monitoring, health probes, secured management endpoints, and Micrometer metrics across JVM services.

Framework-agnostic HTTP API route testing patterns, authentication strategies, and integration testing best practices. Supports REST APIs with JWT cookie authentication and other common auth patterns.

Implement REST API design standards and best practices for Spring Boot projects. Use when creating or reviewing REST endpoints, DTOs, error handling, pagination, security headers, HATEOAS and architecture patterns.

Unit tests for mappers and converters (MapStruct, custom mappers). Test object transformation logic in isolation. Use when ensuring correct data transformation between DTOs and domain objects.

Unit tests for REST controllers using MockMvc and @WebMvcTest. Test request/response mapping, validation, and exception handling. Use when testing web layer endpoints in isolation.

Edge case and boundary testing patterns for unit tests. Testing minimum/maximum values, null cases, empty collections, and numeric precision. Pure JUnit 5 unit tests. Use when ensuring code handles limits and special cases correctly.

Unit tests for external REST APIs using WireMock to mock HTTP endpoints. Use when testing service integrations with external APIs.

AWS Key Management Service (KMS) patterns using AWS SDK for Java 2.x. Use when creating/managing encryption keys, encrypting/decrypting data, generating data keys, digital signing, key rotation, or integrating encryption into Spring Boot applications.

Generate AI content (images, videos, audio) using YAML pipelines with 28+ models. Run tests, estimate costs, and manage outputs.

MANDATORY for discovering CI commands, features, functions, patterns, or tests in a codebase. Uses progressive disclosure - load specific discovery type as needed.

Automated webapp testing with Playwright. Server management, UI testing, visual debugging, and reconnaissance-first approach.

This skill should be used when users explicitly request academic papers, recent research, most cited research, or scholarly articles about longevity, aging, lifespan extension, or related topics. Triggers on phrases like "find papers on", "latest research about", "most cited studies on", or "academic literature about" in the context of longevity.

MANDATORY for ANY bug, test failure, or unexpected behavior - four-phase systematic framework (root cause investigation, pattern analysis, hypothesis testing, implementation) that ensures understanding before attempting solutions. CONSULT THIS SKILL if you find yourself having to fix bugs, test failures, or unexpected behavior.

Never test mock behavior. Never add test-only methods to production classes. Understand dependencies before mocking.