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 Formation Testing Library - Tester efficacement les apps React training are: Maîtrise de React, JavaScript ES6+, outils de build comme Vite ou Create React App. A preliminary interview validates your eligibility.

Is the training available in person?

Yes, the Formation Testing Library - Tester efficacement les apps React training is available in distanciel. The format can be adapted to your needs (inter, intra, custom).

Formation Testing Library - Tester efficacement ... | 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.

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Methods, approaches, and teaching resources

The Formation Testing Library - Tester efficacement les apps React 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 Formation Testing Library - Tester efficacement les apps React 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 Formation Testing Library - Tester efficacement les apps React 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 objectives

Maîtriser Testing Library pour des tests unitaires professionnels en entreprise

Développer des tests réalistes simulant les interactions utilisateurs

Implémenter des assertions précises sur le DOM rendu par React

Optimiser les tests d'intégration avec Mock Service Worker

Concevoir des suites de tests maintenables et certifiantes

Déployer des pratiques TDD adaptées à des projets React complexes

Acquérir des compétences en debugging et coverage pour équipes agiles

Training program

Module 1Fondamentaux Testing Library : installation et queries utilisateur-centrées (React, Jest, setup)

Installation complète de Testing Library dans un projet React existant, configuration avec Jest et React Testing Library pour un environnement professionnel, exploration des queries byRole, byLabelText et byText pour cibler les éléments comme un utilisateur réel, exercices pratiques sur des composants simples avec render et screen, rédaction des premiers tests user-friendly, analyse des meilleures pratiques pour éviter les tests fragiles, production d'un rapport de coverage initial.

Module 2Interactions avancées Testing Library : events et forms (fireEvent, userEvent, validation)

Simulation d'interactions réalistes avec userEvent pour clics, saisie et navigation, manipulation de formulaires React avec validation dynamique, tests de focus management et accessibility via Testing Library, cas concrets sur des hooks custom et composants conditionnels, debugging interactif des échecs de tests, optimisation des matchers pour assertions précises sur états et props, livraison d'une suite de tests forms robuste réutilisable en entreprise.

Module 3Gestion d'état et mocks Testing Library : Context, Redux, API mocks (msw, vi.mock)

Mocking d'API externes avec Mock Service Worker pour tests isolés et fiables, intégration de Testing Library avec React Context et Redux pour états complexes, tests asynchrones avec waitFor et findBy, exercices sur des dashboards réels avec données simulées, résolution de race conditions courantes, mesure du coverage et refactoring pour 90%+, création d'un projet fil rouge avec mocks professionnels certifiants.

Module 4Tests d'intégration Testing Library : routing et portails (React Router, portals, custom render)

Extension de Testing Library pour tester les routes avec MemoryRouter, gestion des portails et modales via within et custom queries, tests end-to-end légers sur flux multi-composants, utilisation de data-testid pour cas spécifiques entreprise, performance testing avec act et cleanup, ateliers collaboratifs sur bugs réels, production de guidelines internes pour équipes de développement agile.

Module 5Optimisation et CI/CD Testing Library : TDD, coverage, déploiement (playwright, GitHub Actions)

Adoption de TDD avec Testing Library pour un développement plus rapide et sûr, configuration de seuils de coverage et rapports SonarQube, intégration en pipelines CI/CD avec GitHub Actions ou Jenkins, migration de tests Jest legacy vers Testing Library moderne, revue de code pair-programming sur le projet fil rouge, certification des compétences via QCM et soutenance, accès prolongé aux ressources pour application immédiate en entreprise.