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.
Training Vitest - Ultra-Fast and High-Performance JS Tests
Trusted by — schools, companies and industrial groups
25,752 programs · 25 countries
Every program built with a dedicated engineer
Companies: Aptar, ArcelorMittal, Equans, EDF, Ubisoft and Microsoft.
Learning objectives
- Configure Vitest for complex projects with custom environments
- Implement advanced mocks and spies to simulate real APIs
- Optimize parallel test performance and achieve 100% coverage
- Integrate Vitest into CI/CD pipelines with GitHub Actions
- Develop snapshot and visual tests for React/Vue UI
- Debug and refactor large-scale test suites
- Adopt best practices for reliable test code maintenance
Program
Module 1Vitest Configuration: Advanced Setup (Vite, TypeScript, Coverage)
Dive into custom Vitest configuration, install and set up vite.config for ultra-fast tests, configure TypeScript and Istanbul coverage, complete practical exercises on a real project, generate detailed HTML reports, run initial test suites to validate immediate performance gains and scale your tests effortlessly.
Module 2Advanced Mocks and Spies: Simulating Dependencies (API, Modules)
Master vi.mock and vi.spy to simulate external APIs and databases, implement mock servers with MSW, practice on real e-commerce cases, generate automated mocks, debug complex interactions, leave with reusable templates that boost your productivity from tomorrow.
Module 3Performance and Parallelism: Optimizing Massive Test Suites
Optimize parallel tests with thread pools, manage persistent caching, analyze bottlenecks via Vitest UI, exercises on monorepos with 1000+ tests, integrate snapshot testing for UI, produce precise coverage, transform slow suites into fast benchmarks, save precious hours in daily development.
Module 4CI/CD Integration and Best Practices: Professional Deployment
Integrate Vitest into GitHub Actions and GitLab CI, set mandatory coverage thresholds, develop hybrid end-to-end tests, group code review for tests, create maintenance playbook, deliverables include ready-to-use pipeline, adopt expert practices for reliable and scalable codebases.
Evaluation method
- Daily interactive quizzes, evaluated practical projects, final exam on real-world case, personalized feedback
Learning method
- 70% intensive practice, real project exercises, individual coaching
Methods, materials and delivery
The Training Vitest - Ultra-Fast and High-Performance JS Tests program is delivered onsite or remote (blended-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.
Equipment required
For the smooth delivery of the Training Vitest - Ultra-Fast and High-Performance JS Tests program, the following equipment is required:
- Mac or PC computers, high-speed fiber internet, whiteboard or flipchart, projector or interactive touch screen (for remote sessions)
- Training environments installed on workstations or accessible online
- Course materials, hands-on exercises and complementary resources
- Post-training access to materials and educational resources
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.
* contact us for remote delivery feasibility** ratio varies depending on the program
Skills assessment methods
Assessment of skills acquired during the Training Vitest - Ultra-Fast and High-Performance JS Tests program is performed through:
- During training: case studies, hands-on labs and professional scenarios
- End of training: self-assessment questionnaire and skills evaluation by the trainer
- After training: completion certificate detailing acquired skills
Program accessibility
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.
Enrollment terms and lead times
Registration is possible up to 48 business hours before the start of training. All our programs are built for corporate L&D budgets and delivered onsite or remotely.
The Learni story
Founded by engineers and learning experts, Learni's mission is to make high-impact tech training accessible to teams everywhere. We work remotely with organizations across the US and Canada, in your time zone, to help teams upskill fast.
Our method
Training quality, guaranteed at every step
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.
You meet the trainer beforehand
30-minute video call between you and the selected trainer to validate the fit, adjust content and clear any final doubts.
- Live briefing on goals and team context.
- Veto right — we swap the trainer for free if needed.
Content tailored to your context
No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.
- Hands-on cases drawn from your stack and projects.
- Program co-written then validated by your team.
Continuous quality follow-up
Live evaluations, 30/90/180-day check-ins and a consolidation plan. If the impact misses the mark, we rework it.
- NPS, knowledge quizzes and skills self-assessment.
- Satisfaction guarantee: fully satisfied or free rework.
A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.
Our social commitment
A school kit donated to a child for every training booked
To fight inequalities in access to education, Learni donates a complete school kit to a child in need for every training booked. You build your skills, a child heads back to school.
- Backpack, notebooks and essential supplies
- Distributed through our partner charities
- Included, at no extra cost to you
FAQ
Frequently asked questions
Which tools are used in Vitest training?+
Hands-on work runs on vite, typeScript, coverage, API and modules. Those tools come from the Vitest program itself, delivered on site over 4 days, so participants practise on the stack they will use at work.
What can participants do after Vitest training?+
They can configure Vitest for complex projects with custom environments, implement advanced mocks and spies to simulate real APIs and optimize parallel test performance and achieve 100% coverage. Those are the stated objectives of the Vitest program at Advanced level, checked by the end-of-session assessment.
What does the Vitest program cover, day by day?+
Day 1: Vitest Configuration: Advanced Setup (Vite, TypeScript, Coverage). Day 2: Advanced Mocks and Spies: Simulating Dependencies (API, Modules). Day 3: Performance and Parallelism: Optimizing Massive Test Suites. Day 4: CI/CD Integration and Best Practices: Professional Deployment. The Vitest program runs over 4 days, delivered on site.
How is Vitest training assessed?+
Assessment relies on daily interactive quizzes, evaluated practical projects, final exam on real-world case, personalized feedback. Learni issues a completion certificate together with the individual assessment report at the end of the Vitest program, which an L&D team can file as evidence.
How much does Vitest training cost per participant?+
Vitest training is priced on quote. The amount depends on headcount, format and how far the syllabus is tailored to your team. A detailed quote is sent within one business day, and team pricing covers the whole group from the second participant.Vitest training costs $4,620 per participant. For an in-company team, the flat rate starts at $7,865 for the whole group, up to 8 people. The detailed quote, sent within one business day, adjusts the amount to the format and how far the syllabus is tailored to your team.
How long does Vitest training take?+
4 days, available live online (US time zones) or on-site at your offices. Half-day tracks spread over several weeks are possible so the team stays operational.
Who pays for Vitest training?+
Most US teams pay directly through their company L&D or training budget. Learni invoices in US dollars and accepts bank transfer (ACH/wire) or card, with volume pricing for teams. A purchase order is welcome.
What do participants need to know before Vitest training?+
Mastery of JavaScript ES6+, experience with Vite or bundlers, familiarity with Jest or unit tests.
Is a certificate issued after Vitest training?+
Yes. A Learni completion certificate is issued, along with the individual evaluation report. Learni is a certified training provider and prepares for third-party certifications, but does not award them itself.
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