Rigorous trainer selection
Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.
- Triple validation: technical, pedagogical, sectoral.
- Minimum rating 4.8/5 over the last 12 sessions.
Describe your need, get a tailored program and a pre-filled quote in 3 min. A 100% free call with an advisor.
Founded by passionate learning and innovation experts, Learni's mission is to make professional training accessible to everyone, anywhere in the world. Our team operates in major hubs — London, New York, Boston — and internationally, to support talents and organizations in upskilling.
Don't let this gap widen
Without this upskilling, your team accumulates a technological gap that translates directly into productivity loss.
Organizations that don't train their talents on key topics see their competitiveness drop.
Every quarter without training is a gap widening with competitors who invest.
The cost of inaction quickly exceeds that of well-targeted training.
Quick installation of Vitest in an existing Vite project, configuration of the vitest.config.js file for ultra-performant tests, writing first unit tests on pure functions with expect and built-in matchers, exploration of watch and coverage modes for immediate feedback, practical exercises on concrete business cases like validating JavaScript utilities, generation of an initial test report with coverage thresholds, all to immediately boost your professional testing skills.
Creating mocks to simulate external dependencies like APIs or third-party modules via vi.mock and vi.fn, using spies to inspect function calls in complex scenarios, mastering asynchronous tests with beforeEach, afterAll, and promise handling, application to custom hooks and real services, resolving common production error cases, developing a robust test suite for a business component, with code review by the trainer for immediate and certifiable skill enhancement.
Integration of Vitest with React Testing Library to test functional components without internal implementation, simulation of user interactions via userEvent for clicks, inputs, and navigation, testing conditional rendering and multiple states in reactive apps, adaptation to Vue or Svelte frameworks with dedicated renderers, exercises on a red thread enterprise project like an interactive dashboard, generation of snapshots to validate UI evolutions, achieving complete visual coverage for maintainable professional interfaces.
In-depth analysis of code coverage with @vitest/coverage-istanbul to identify critical areas, configuration of parallel tests and worker pools to speed up runs on large projects, integration into CI/CD pipelines via GitHub Actions or GitLab CI with minimum thresholds, refactoring slow tests for optimal team performance, practical cases on secure automated deployment, creation of an action plan for your company, finalization of the red thread project with certifying evaluation and resources for total autonomy.
The Training Vitest - Mastering Ultra-Fast Unit Tests program is delivered onsite or remote (blended-learning, e-learning, virtual classroom, remote presence). At Learni, an industry-certified training organization, every program is built to maximize skills acquisition regardless of the chosen format.
The trainer alternates between demonstrative, interrogative and active methods (through hands-on labs and/or scenarios). This pedagogical approach guarantees concrete learning that's immediately applicable at work.
For the smooth delivery of the Training Vitest - Mastering Ultra-Fast Unit Tests program, the following equipment is required:
For intra-company training on a site outside Learni, the client commits to providing all required teaching materials (computers, internet, etc.) for the smooth delivery of the program in line with the prerequisites in the communicated program.
Assessment of skills acquired during the Training Vitest - Mastering Ultra-Fast Unit Tests program is performed through:
Learni is committed to making its programs accessible. All our programs are accessible to people with disabilities. Our teams are available to adapt the pedagogical methods to your specific needs. Please contact us for any adjustment request.
Learni programs are available inter-company and intra-company, onsite or remote. Enrollments are possible up to 48 business hours before the program starts. Our programs are eligible for corporate funding paths. Contact us to discuss your training project and funding options.
« cool, j'ai appris des trucs »
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
« 😊👍 »
« bien 👍 »
« Allan Busi t'es au top, continue comme ça. formation géniale »
« cool, j'ai appris des trucs »
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
« 😊👍 »
« bien 👍 »
« Allan Busi t'es au top, continue comme ça. formation géniale »
« cool, j'ai appris des trucs »
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
« 😊👍 »
« bien 👍 »
« Allan Busi t'es au top, continue comme ça. formation géniale »
Before, during, after: we frame the brief, introduce the trainer, tailor the content and measure impact. You stay in control from kickoff to wrap-up.
Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.
30-minute video call between you and the selected trainer to validate the fit, adjust content and clear any final doubts.
No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.
Live evaluations, 30/90/180-day check-ins and a consolidation plan. If the impact misses the mark, we rework it.
A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.
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Développement WebIndustry-certified
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Tests AutomatisésIndustry-certified
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Tests AutomatisésIndustry-certified30 minutes with a learning advisor. No commitment. No sales pitch dressed up as a demo.