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 Jest - Mastering JavaScript Unit Tests
Trusted by — schools, companies and industrial groups
40,841 programs · 25 countries
Every program built with a dedicated engineer
Companies: Aptar, ArcelorMittal, Equans, EDF, Ubisoft and Microsoft.
Jest training objectives
- Master Jest to implement professional unit tests in a business environment
- Develop robust and performant test suites with advanced matchers
- Configure mocks and stubs to simulate complex dependencies
- Optimize integration and React component tests with Jest
- Implement certified test-driven development practices
- Deploy CI/CD pipelines integrating Jest for continuous delivery
- Acquire skills in code coverage and automated reporting
Jest curriculum: 4 modules over 4 days
Module 1 : Jest Configuration: Setup and First Advanced Tests (matchers, assertions, setup)
Installation and custom configuration of Jest in an existing JavaScript project, in-depth exploration of matchers like toBe, toMatchObject, and toThrow to validate complex behaviors, writing tests on pure functions and async code with async/await, practical exercises on real business cases, initial report generation, and optimization of execution speed for rapid team feedback.
Module 2 : Jest Mocking: Simulating Dependencies and External APIs (jest.fn, jest.mock, spies)
Creating manual and automatic mocks with jest.fn to isolate code units, simulating REST APIs and databases via jest.mock, using spies to inspect function calls, practical tests on Node.js modules and React components, resolving real-world cases like user authentication, producing testable deliverables ready for enterprise code review.
Module 3 : Advanced Jest Tests: Snapshots, Coverage, and TDD Patterns (jest-dom, enzyme)
Implementing snapshots to validate UI renders with react-testing-library, measuring and optimizing code coverage above 80% via --coverage, adopting test-driven development on an ongoing e-commerce application project, integrating jest-dom for precise DOM assertions, collaborative exercises simulating agile sprints, generating detailed HTML reports to demonstrate professional code quality.
Module 4 : Jest Integration: CI/CD and Enterprise Best Practices (GitHub Actions, Advanced Jest Config)
Configuring CI/CD pipelines with Jest in GitHub Actions and Jenkins for automated deployments, test parallelization to scale on large projects, refactoring existing suites for optimal maintainability, auditing legacy code with Jest for rapid migration, simulating production incidents and resolution via tests, finalizing the ongoing project with coverage badges and certified documentation for professional portfolio.
How Jest skills are assessed
- Multiple-choice quiz to validate learning outcomes at the end of the training
- Continuous assessment through practical exercises on Jest
- Defense of the ongoing project on advanced unit tests
How the Jest course is taught
- Courses led by an active expert Jest trainer
- Practical exercises on real business cases with Jest
- Progressive ongoing project to master complete tests
- Complete course materials provided to each participant
Jest training: access and practical arrangements
The Training Jest - Mastering JavaScript Unit 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 Jest - Mastering JavaScript Unit 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 Jest - Mastering JavaScript Unit 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
How Learni guarantees the quality of your Jest training
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
Jest: frequently asked questions
Which tools are used in Jest training?+
Hands-on work runs on matchers, assertions, setup, jest.fn, jest.mock and spies. Those tools come from the Jest program itself, delivered on site over 4 days, so participants practise on the stack they will use at work.
What can participants do after Jest training?+
They can master Jest to implement professional unit tests in a business environment, develop robust and performant test suites with advanced matchers and configure mocks and stubs to simulate complex dependencies. Those are the stated objectives of the Jest program at Intermediate level, checked by the end-of-session assessment.
What does the Jest program cover, day by day?+
Day 1: Jest Configuration: Setup and First Advanced Tests (matchers, assertions, setup). Day 2: Jest Mocking: Simulating Dependencies and External APIs (jest.fn, jest.mock, spies). Day 3: Advanced Jest Tests: Snapshots, Coverage, and TDD Patterns (jest-dom, enzyme). Day 4: Jest Integration: CI/CD and Enterprise Best Practices (GitHub Actions, Advanced Jest Config). The Jest program runs over 4 days, delivered on site.
How is Jest training assessed?+
Assessment relies on multiple-choice quiz to validate learning outcomes at the end of the training, continuous assessment through practical exercises on Jest and defense of the ongoing project on advanced unit tests. Learni issues a completion certificate together with the individual assessment report at the end of the Jest program, which an L&D team can file as evidence.
How much does Jest training cost per participant?+
Jest 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 Jest 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 Jest 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 Jest training?+
Mastery of JavaScript ES6+, experience in application development, and basics in unit testing.
Is a certificate issued after Jest 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.
Does Learni provide the equipment for Jest training?+
No. A computer and a stable internet connection are required for each participant. Learni provides the learning platform, the trainer and all course materials.
Your professional training, anywhere
Let's build your Jest learning path.
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