fault-injection-testing

About fault-injection-testing

Simulates storage and network failures for resilience testing. Provides a circuit breaker state machine, retry policies with backoff, and queue-preservation assertions. Includes utilities (createFaultScenario, createFaultInjector), a CircuitBreaker state machine (closed/open/half-open), a configurable RetryPolicy with backoff, and assertions (assertQueuePreserved/assertQueueTrimmed) to validate data integrity. Typical workflow: enumerate fault scenarios, inject failures against external dependencies, validate circuit-breaker transitions and backoff timing, and assert transactional/idempotent behavior and queue handling. Use cases: validating retry and rollback logic, protecting microservices from cascading failures, verifying queuing guarantees, and testing third-party API error handling. Avoid applying it to pure functions or UI-only components. Core advantages: uncover edge-case failures, prove resilience quantitatively, and reduce production incidents by exercising realistic fault modes.

用于弹性测试，模拟存储和网络故障。提供断路器（CircuitBreaker）状态机、带退避策略的重试机制，以及队列保全相关断言。主要功能包括工具（createFaultScenario、createFaultInjector）、断路器状态机（闭合/打开/半开）、可配置的带退避的 RetryPolicy，以及用于验证数据完整性的断言 assertQueuePreserved/assertQueueTrimmed。典型工作流程：枚举故障场景、向外部依赖注入故障、验证断路器转态和退避时序，并断言事务/幂等行为与队列处理。使用场景：验证重试与回滚逻辑、保护微服务免受级联故障、验证排队保障、测试第三方 API 的错误处理等。不适用于纯函数或仅 UI 的组件。核心优势：揭示边缘案例故障、以定量方式证明弹性，并通过演练真实故障模式减少生产事故。