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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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Professional Training training in Dallas in July 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
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Don't let this gap widen
Without Vitest mastery, 60% of bugs escape manual tests, tripling debug time and costing up to 20k€/year in production for a team of 5 devs.
Slow tests hinder CI/CD, delaying deployments by 40%, while missing mocks cause 70% of false positives in staging.
Risk client outages or opt for reliable tests boosting productivity by 30% from the first sprint?
The Training Vitest - Fast and Reliable Unit Tests in JS 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 - Fast and Reliable Unit Tests in JS 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 - Fast and Reliable Unit Tests in JS 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.
Discover Vitest by installing the tool in your existing Vite project, configure vite.config.js for ultra-fast execution, write your first tests with describe, it, and expect, chain practical exercises on React components or pure functions, generate snapshots to validate UI renders, leave with a personally tested project and tips to accelerate TDD starting tomorrow.
Dive into mocks to isolate external dependencies via vi.mock and vi.spyOn, test simulated APIs and asynchronous modules on real app cases, measure code coverage with @vitest/coverage to identify weaknesses, integrate with CI/CD via GitHub Actions examples, optimize performance with watch mode and parallelism, produce a final deliverable report proving 90% coverage on your code.
Target audience
JavaScript/TS developers, frontend/backend engineers, to upskill in performant automated testing.
Prerequisites
Mastery of JavaScript ES6+, experience with Vite or similar bundler, basic knowledge of unit testing.
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