How To Dev

Introduction Contract Testing is an integration testing method focused on verifying the interaction between a Consumer (the service user) and a Provider (the service provider). Instead of testing the entire system, Contract Testing ensures that both parties adhere to a shared covenant (contract). Key benefits include: early detection of non-compatible errors between Frontend and Backend, reduction of dependency on complex staging environments and enabling API changes to be made more confidently without breaking the partner's application. Pact is currently the most popular Consumer-Driven Contract Testing tool. It allows the Consumer to define expectations regarding the response from the Provider and then packages these expectations into a JSON file (Pact file). Pact's advantages lie in supporting multiple languages, automatically generating documentation based on test cases and having robust integration capabilities into CI/CD pipelines to ensure the Provider always meets the C...

Introduction In this article, I will guide you on adding Jest (currently the most popular testing library) to test for projects using the NextJS framework. This integration helps developers automate the source code testing process, from logical functions (Unit Testing) to user interface testing (Integration Testing) in the Node.js environment. Here are the prominent advantages: Fast and effective: Jest runs tests in parallel, saving significant time as the project scales. Built-in Support: Next.js provides the next/jest configuration, making setup extremely simple, automatically handling CSS files, images, and framework-specific features. Excellent Watch Mode: Jest has the ability to detect recently changed files and only run related tests, keeping the development workflow smooth. Coverage Reports: This tool has built-in capability to statistic the percentage of source code tested, helping you assess application quality and reliability visually. Rich ecosystem: When combined with React...