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Founded by passionate advocates of learning and innovation, Learni set out to make professional training accessible to everyone, everywhere in the world. Our team works in the largest cities such as Paris, Lyon, Marseille, and internationally, to support talents and organizations in their skills development.
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30 free minutes with a training advisor — no commitment.
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Artificial Intelligence training in Raleigh in June 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
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Artificial Intelligence training in Cardiff in May 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
Don't let this gap widen
Without mastering Vitest, your Jest tests run 5x slower, critical bugs go unnoticed in 40% of deployments, teams lose 25% of time on manual debugging, project delays climb to 30 days/month, maintenance costs explode x3 according to State of JS studies, code coverage stagnates below 70% risking failed security audits, agile competitors overtake you with 10x faster pipelines.
The Training Vitest - Ultra-Fast and Reliable JS Tests training is delivered in-person or remotely (blended-learning, e-learning, virtual classroom, remote in-person). At Learni, a Qualiopi-certified training organization, each program is designed to maximize skills acquisition, regardless of the training mode chosen.
The trainer alternates between demonstrative, interrogative, and active methods (through practical exercises and/or real-world scenarios). This pedagogical approach ensures concrete and directly applicable learning in the workplace.
To ensure the quality of the Training Vitest - Ultra-Fast and Reliable JS Tests training, Learni provides the following teaching resources:
For in-house training at a location external to Learni, the client ensures and commits to having all necessary teaching materials (IT equipment, internet connection...) for the proper conduct of the training action in accordance with the prerequisites indicated in the communicated training program.
The assessment of skills acquired during the Training Vitest - Ultra-Fast and Reliable JS Tests training is carried out through:
Learni is committed to the accessibility of its professional training programs. All our training programs are accessible to people with disabilities. Our teams are available to adapt teaching methods to your specific needs. Do not hesitate to contact us for any accommodation request.
Learni training programs are available for inter-company and intra-company settings, both in-person and remote. Registration is possible up to 48 business hours before the start of training. Our programs are eligible for OPCO, Pôle emploi, and FNE-Formation funding. Contact us to discuss your training project and funding possibilities.
Dive into expert Vitest installation with Vite, configure ultra-fast watchers, explore advanced coverage, complete exercises on real projects to create your first optimized workspace, test Node.js and browser modules in parallel, produce a production-ready configuration report.
Write complex tests with vi.mock and vi.spy, handle timers and asynchronous promises, practice on concrete cases like API fetches and state management, generate dynamic snapshots, debug with the intuitive Vitest UI, build a test suite with 90% coverage on a React/Vue app, take home reusable templates.
Integrate Vitest with GitHub Actions and Jenkins through practical exercises, measure and boost speed with parallel sharding, test monorepo libraries, analyze bottlenecks with profiling tools, deploy custom scripts for zero-config team use, simulate an end-to-end pipeline on a live project, obtain a ready-to-use metrics dashboard.
Explore advanced patterns for TDD/BDD, manage flaky tests and mutations, apply test-driven refactoring on legacy code, review war stories from Fortune 500 teams, customize reporters and plugins, finalize a capstone project with 100% coverage, receive a best practices kit and certification to boost your CV immediately.
Target audience
Senior JavaScript developers, technical leads, frontend/backend architects upskilling on modern testing.
Prerequisites
Advanced mastery of JavaScript ES6+, experience with Jest or similar testing framework, knowledge of Vite/Node.js, production projects.
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