Is the training Qualiopi certified?

Yes, Learni is a Qualiopi-certified training organization. This certification guarantees the quality of our courses and enables funding through OPCO and other mechanisms.

How can I fund my training?

Our courses are eligible for OPCO funding. Learni supports you through the funding process. A personalized quote is available upon request.

What are the prerequisites for this training?

The prerequisites for the Jest Training - Master Advanced JavaScript Unit Testing training are: Mastery of JavaScript ES6+, experience with a basic testing framework like Mocha.. A preliminary interview validates your eligibility.

Is the training available in person?

Yes, the Jest Training - Master Advanced JavaScript Unit Testing training is available in in-person. The format can be adapted to your needs (inter, intra, custom).

Jest Training - Master Advanced JavaScript Unit ... | Learni

The story of Learni

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.

Configure your training

Response within 24hNo commitment100% free

8 spots remaining for the next session

FormatParticipantsDateDetails

Which format do you prefer?

Methods, approaches, and teaching resources

The Jest Training - Master Advanced JavaScript Unit Testing 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.

Teaching resources provided

To ensure the quality of the Jest Training - Master Advanced JavaScript Unit Testing training, Learni provides the following teaching resources:

Mac or PC computers, high-speed fiber internet, whiteboard or flipchart, video projector or interactive touchscreen (for remote sessions)
Training environments installed on workstations or accessible online
Course materials, practical exercises, and supplementary resources
Post-training access to materials and 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.

* contact us for remote feasibility** ratio varies depending on the training followed

Assessment methods

The assessment of skills acquired during the Jest Training - Master Advanced JavaScript Unit Testing training is carried out through:

During training: case studies, practical exercises, and professional scenarios
At the end of training: self-assessment questionnaire and skills evaluation by the trainer
After training: training completion certificate detailing acquired skills

Training accessibility

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.

Training access terms and deadlines

Training program

Module 1Day 1: Jest Configuration and Advanced Matchers (CLI tools, Jest.config.js, assertions)

Dive into Jest installation and custom configuration via CLI and jest.config.js, test immediately with advanced matchers like toMatchObject or toHaveLength, complete exercises on real-world JSON data validation cases, generate your first detailed test reports, alternating quick theory and intensive practice for immediate skill ramp-up.

Module 2Day 2: Powerful Mocks and Spies (jest.fn, jest.mock, API simulation)

Create manual mocks with jest.fn and automatic ones via jest.mock to simulate external APIs, spy on functions to verify calls and returns, apply to concrete cases like mocked HTTP fetch, generate mock snapshots for smooth maintenance, experience the thrill of isolated tests boosting your productivity from day one.

Module 3Day 3: Asynchronous Tests and Snapshots (async/await, Promise, toMatchSnapshot)

Master async tests with expect.assertions and resolvers, capture snapshots for React components or complex objects, handle async errors via try/catch, practice on real Node.js app scenarios, produce robust production-ready test suites, with a pedagogical flow that makes every exercise engaging and practical.

Module 4Day 4: Code Coverage and Optimization (jest --coverage, thresholds)

Analyze coverage with jest --coverage and enforce 90% thresholds, optimize slow tests via --watch and bail, integrate setup/teardown hooks, work on an open-source project to boost real coverage, receive live feedback for immediate gains, transform your tests into a strategic asset.

Module 5Day 5: Best Practices and Capstone Project (CI/CD, test refactoring)

Integrate Jest into GitHub Actions for smooth CI/CD, refactor an existing test suite for maintainability, develop a complete final project using all tools covered, present your deliverables and receive certification, end as a hero of reliable testing, ready to excel in your team.