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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.
10 spots per session maximum — 10 already taken
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30 free minutes with a training advisor — no commitment.
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Don't let this gap widen
Without mastery of advanced React Testing Library techniques, 70% of production bugs in modern React apps go undetected until user complaints flood in.
This triggers an average $85,000 per incident in emergency fixes, downtime, and lost revenue, with teams wasting 35 hours weekly per developer on preventable debugging.
Companies without these skills face 4x higher failure rates on releases, stalling growth and exposing developers to career setbacks amid rising demands for reliable code.
Every unaddressed flaw escalates risks exponentially.
The Advanced Testing Training with React Testing Library 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 Advanced Testing Training with React Testing Library 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 Advanced Testing Training with React Testing Library 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.
Frontend testing fundamentals; differences between unit, integration, and end-to-end tests; introduction to React Testing Library; installation and first test on a simple component.
Simulate user events (clicks, forms, navigation); use of React Testing Library queries; working with mocks and fakes; advanced assertions.
Tests on components with state management (useState, useReducer); tests of asynchronous effects (useEffect linked to an API); combining React Testing Library and Jest; code coverage and best practices for refactoring tests.
Target audience
Developers and web integrators who wish to master testing modern React applications
Prerequisites
Good knowledge of React and JavaScript fundamentals (ES6+)
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