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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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30 free minutes with a training advisor — no commitment.
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Discover essential strategies, trends, and best practices for effective GDPR compliance training tailored for organizations preparing for March 2026 enforcement and updates.
Artificial Intelligence training in Raleigh in June 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
Cybersecurity training in Oklahoma City in December 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
Artificial Intelligence training in San Francisco in October 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
Don't let this gap widen
Sans maîtrise avancée de Testing Library, 68% des bugs front-end atterrissent en production, coûtant en moyenne 15 000€ par incident majeur selon Gartner.
Les équipes perdent 45% de temps en debugging manuel, retardant les releases de 3 semaines.
En 2026, 82% des offres DevOps exigent des compétences en testing moderne, écartant les profils obsolètes.
Votre entreprise risque des pertes de CA e-commerce jusqu'à 25% dues à des UX défaillantes non détectées.
Agissez pour sécuriser vos déploiements et booster la fiabilité.
The Formation Testing Library - Tests robustes pour 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.
To ensure the quality of the Formation Testing Library - Tests robustes pour apps React training, Learni provides the following 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.
The assessment of skills acquired during the Formation Testing Library - Tests robustes pour apps React training is carried out through:
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.
Learni training programs are available for inter-company and intra-company settings, both in-person and remote. Registration is possible up to 48 business hours before the start of training. Our programs are eligible for OPCO, Pôle emploi, and FNE-Formation funding. Contact us to discuss your training project and funding possibilities.
Plongez dans les queries byRole et byText pour cibler précisément les éléments, simulez des clics, saisies et navigations avec userEvent en remplaçant fireEvent, appliquez des assertions sur le DOM rendu pour valider les comportements utilisateur, réalisez des exercices sur des composants React complexes d'entreprise, produisez un premier projet fil rouge avec 80% de couverture de code, bénéficiez de code reviews personnalisées par le formateur expert.
Gérez les promesses et fetches API avec waitFor et screen.debug pour des tests fluides, intégrez MSW pour mocker des endpoints REST sans dépendances externes, testez l'accessibilité WCAG via jest-axe et queries ARIA, optimisez la performance des suites avec custom renderers, appliquez tout sur un cas concret d'application e-commerce scalable, finalisez le projet fil rouge déployable en CI/CD, repartez avec des compétences certifiantes prêtes pour production.
Target audience
Développeurs front-end, ingénieurs qualité et leads techniques pour une montée en compétences certifiante
Prerequisites
Maîtrise de JavaScript ES6+, React Hooks et bases de Jest avec Testing Library
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