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.
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Program
Complete installation of Testing Library in an existing React project, configuration with Jest and React Testing Library for a professional environment, exploration of queries byRole, byLabelText, and byText to target elements like a real user, practical exercises on simple components with render and screen, writing the first user-friendly tests, analysis of best practices to avoid fragile tests, production of an initial coverage report.
Simulation of realistic interactions with userEvent for clicks, input, and navigation, handling React forms with dynamic validation, testing focus management and accessibility via Testing Library, concrete cases on custom hooks and conditional components, interactive debugging of test failures, optimization of matchers for precise assertions on states and props, delivery of a robust, reusable enterprise form test suite.
Mocking external APIs with Mock Service Worker for isolated and reliable tests, integration of Testing Library with React Context and Redux for complex states, asynchronous tests with waitFor and findBy, exercises on real dashboards with simulated data, resolution of common race conditions, measurement of coverage and refactoring to 90%+, creation of a red thread project with professional certifiable mocks.
Extension of Testing Library to test routes with MemoryRouter, management of portals and modals via within and custom queries, lightweight end-to-end tests on multi-component flows, use of data-testid for enterprise-specific cases, performance testing with act and cleanup, collaborative workshops on real bugs, production of internal guidelines for agile development teams.
Adoption of TDD with Testing Library for faster and safer development, configuration of coverage thresholds and SonarQube reports, integration into CI/CD pipelines with GitHub Actions or Jenkins, migration of legacy Jest tests to modern Testing Library, pair-programming code review on the red thread project, certification of skills via MCQ and defense, extended access to resources for immediate enterprise application.
The Training Testing Library - Effectively Test React Apps 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 Testing Library - Effectively Test React Apps program, the following equipment is required:
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.
Skills assessment methods
Assessment of skills acquired during the Training Testing Library - Effectively Test React Apps program is performed through:
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.
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.
Rigorous trainer selection
Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.
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.
Content tailored to your context
No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.
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.
A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.

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.
30 minutes with a learning advisor. No commitment. No sales pitch dressed up as a demo.
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