As JavaScript applications grow more complex, ensuring their reliability requires a comprehensive approach to testing. In this session we will do a deep dive into automating unit tests, integration tests, and end-to-end (E2E) tests, offering a full-stack strategy for building excellent, maintainable, and scalable applications. Attendees will learn how each type of test contributes to the overall stability of your project, how to choose the right tools for different testing layers, how to automate and integrate them into your CI/CD pipelines for continuous quality assurance.