Testing
Go's testing package has no built-in snapshot testing, but two libraries fill the gap: cupaloy (simpler, widely used) and go-snaps (more features, testify integration). Both capture test output to files, compare on future runs, and update via an environment variable flag. This guide covers both with
Testing
Payment integrations are uniquely high-stakes: bugs mean lost revenue, double charges, failed refunds, or security incidents.
Testing
A previous guide covered the basics of testing MCP servers — unit testing tools, resources, and prompts with in-memory transports.
Testing
Syrupy is the most popular snapshot testing plugin for pytest. It stores snapshots in __snapshots__/ directories alongside your test files, uses YAML-like .ambr format for human-readable diffs, and integrates with pytest's assertion rewriting for clear failure messages. This guide covers installation, writing snapshot tests, updating snapshots,
Testing
Your AI agent worked great in development. Then you changed the system prompt by three sentences, deployed it, and customer satisfaction dropped 12%.
Testing
Retrieval-Augmented Generation (RAG) systems are notoriously hard to test.
Testing
RAG evaluation frameworks exist because manual inspection doesn't scale.
Testing
Vector databases are infrastructure. Like any database, they can be misconfigured, queried incorrectly, or updated in ways that corrupt your index.
Testing
Embeddings are the foundation of semantic search, RAG systems, and recommendation engines.
Testing
Chunking is one of the most impactful and least-tested parts of a RAG pipeline.
Testing
LangChain and LlamaIndex are composable systems. A RAG chain is a sequence of components: a retriever, a prompt template, an LLM, an output parser.
Testing
PDF testing requires a layered approach: text content assertions, page structure checks, visual regression diffs, and accessibility validation. This guide covers strategies that work regardless of how your PDFs are generated — Puppeteer, WeasyPrint, iText, PDFBox, ReportLab, or any other tool — and shows how to combine them into a CI-ready