Run an API program at scale - design-first vs code-first, Spectral linting, oasdiff breaking-change gates, Prism mocks, OpenAPI Generator interfaces, Pact consumer-driven contracts, Schemathesis fuzzing, CI pipeline, API catalog and review process.
AWS CodeBuild deep dive for DVA-C02. buildspec.yml phases, environment variables, artifacts, caching, VPC support, test reports, and Maven/Gradle Java integration.
Deep dive into the philosophy, mechanics, and architecture of Black-Box and System Testing — Equivalence Partitioning, Boundary Value Analysis, End-to-End verification, NFR validation, and modern production testing patterns.
**Component performance testing** measures the behaviour and resource consumption of a **single service or component** under controlled load conditions — in.
Complete senior principal engineering guide to Consumer-Driven Contract Testing (CDCT), Pact framework architecture, Spring Boot provider verification, the can-i-deploy pipeline gate, and asynchronous messaging contracts.
**End-to-end (E2E) testing** validates complete user journeys through the entire system stack — from the user interface through the API gateway, multiple.
**Inflight testing** (also called **production smoke testing** or **synthetic monitoring**) is the practice of running automated tests against a live.
**Integration tests** validate that multiple components work correctly together. Unlike unit tests, they test real interactions — against a real database.
Production operations guide for Kafka Streams: unit testing with TopologyTestDriver, observability metrics runbook, 7 fatal anti-patterns, 5-way streaming engine comparison, system design architectures, and complete failure mitigation matrix.
The **Testing phase** verifies that the software meets all functional and non-functional requirements before it is deployed to production. Testing is a quality.
**Regression testing** is the process of re-running existing test suites after code changes to verify that previously working functionality has not been broken.
Complete reference for JUnit 5, Mockito, and Spring Boot testing annotations — what each does, when to use it, and production-grade code examples for Java/Spring engineers.
From first principles to production — unit testing, integration testing, the test pyramid, mocking strategies, TDD, and battle-tested best practices for Java/Spring engineers.
A **unit test** validates the behaviour of a single, isolated unit of code — typically a method or class — without involving external dependencies such as.
WireMock creates a real HTTP server for stubbing and mocking external APIs in tests. This guide covers setup, advanced stubs, fault simulation, contract testing, and production-grade patterns for Java/Spring engineers.
