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Training Testing Library - Robust and Maintainable UI Tests

Ref: VCH548
10 people max.
4400€ HT / per person
−15% from 2 people−30% from 3 people−50% from 5 people
Pay in 3 installments · +$170/day onsite · +$500 with certification exam
4 journées
distanciel

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Learning objectives

  • Master advanced, user-centric queries in Testing Library for reliable tests in certified professional training.
  • Develop complex mocking strategies and custom renderers to simulate real-world enterprise environments.
  • Implement accessibility and performance tests with Testing Library to enhance frontend expertise.
  • Design end-to-end test suites integrating Testing Library with Cypress or Playwright in an expert context.
  • Optimize maintenance and refactoring of legacy tests for scalable, certified projects.
  • Deploy automated CI/CD pipelines with Testing Library for professional continuous delivery.
  • Acquire certified skills in advanced debugging and Testing Library best practices for teams.

The Learni story

Founded by passionate learning and innovation experts, Learni's mission is to make professional training accessible to everyone, anywhere in the world. Our team operates in major hubs — London, New York, Boston — and internationally, to support talents and organizations in upskilling.

Don't let this gap widen

Why this program matters

  • Without this upskilling, your team accumulates a technological gap that translates directly into productivity loss.

  • Organizations that don't train their talents on key topics see their competitiveness drop.

  • Every quarter without training is a gap widening with competitors who invest.

  • The cost of inaction quickly exceeds that of well-targeted training.

Fouzi Benzidane
Fouzi Benzidane

Learni Trainer · Expert

73%productivity gap
×3cost of inaction

Program

Module 1Advanced Testing Library Queries: User-Centric Testing and Custom Matchers (React, Vitest)

Dive into byRole, byText, and byLabel queries from Testing Library to test like a real user, avoiding fragile CSS selectors. Install custom matchers with @testing-library/jest-dom, perform practical exercises on complex React components, and integrate strategic data-testid attributes. Analyze concrete refactoring cases for existing tests, generate 90% coverage reports via Vitest, and debrief in groups to consolidate expert skills over 7 intensive hours.

Module 2Mocking and Renderers in Testing Library: API Simulation, Context Providers (MSW, React Context)

Configure realistic mocks with MSW to intercept API calls during Testing Library tests, simulating authentic error and loading states. Implement custom renderers wrapping Redux or React Query providers, test custom hooks via @testing-library/react-hooks. Apply to enterprise dashboards, generate smart snapshots, optimize suite speed with parallel workers, and validate CI/CD-ready deliverables in 7 hours of intensive practice.

Module 3Accessibility and Performance Tests with Testing Library: axe-core, Lighthouse CI (a11y, Bundle Analysis)

Integrate jest-axe for automated accessibility audits in Testing Library, verifying ARIA roles and keyboard navigation on complex forms. Pair with Lighthouse to profile rendering performance, test lazy loading and virtualization with react-window. Handle real e-commerce app cases, produce WCAG 2.1 AA reports, debug violations with axe DevTools, and integrate into GitHub Actions workflows for enterprise quality in 7 hours of hands-on workshops.

Module 4E2E Integration and CI/CD with Testing Library: Playwright, Advanced Pipelines (GitLab, Vercel)

Hybridize Testing Library with Playwright for visual and cross-browser tests, migrate Jest suites to a full E2E stack. Deploy CI/CD pipelines on GitLab CI or Vercel, configure flakiness thresholds to 1%, and analyze failures with Allure reports. Complete a capstone project on a fullstack app, refactor legacy code, generate a skills certification, and plan post-training follow-up for the enterprise, concluding with an expert Q&A over 7 hours.

Evaluation method

  • Advanced quizzes and live coding challenges to validate queries and mocking.
  • Real-world case studies with legacy test refactoring and accessibility audits.
  • Final certified project: complete E2E suite deployed in CI/CD, graded at 90% minimum.

Learning method

  • 70% hands-on practice on real code, 30% applied theory for maximum retention.
  • Small groups of max 10, personalized feedback from certified trainers.
  • Lifetime resources: GitHub repo, replay videos, alumni Discord community.
  • Qualiopi certification delivered, RNCP-recognized for career advancement.

Methods, materials and delivery

The Training Testing Library - Robust and Maintainable UI Tests program is delivered onsite or remote (blended-learning, e-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 - Robust and Maintainable UI Tests program, the following equipment is required:

  • Mac or PC computers, high-speed fiber internet, whiteboard or flipchart, projector or interactive touch screen (for remote sessions)
  • Training environments installed on workstations or accessible online
  • Course materials, hands-on exercises and complementary resources
  • Post-training access to materials and educational resources

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.

* contact us for remote delivery feasibility** ratio varies depending on the program

Skills assessment methods

Assessment of skills acquired during the Training Testing Library - Robust and Maintainable UI Tests program is performed through:

  • During training: case studies, hands-on labs and professional scenarios
  • End of training: self-assessment questionnaire and skills evaluation by the trainer
  • After training: completion certificate detailing acquired skills

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

Learni programs are available inter-company and intra-company, onsite or remote. Enrollments are possible up to 48 business hours before the program starts. Our programs are eligible for corporate funding paths. Contact us to discuss your training project and funding options.

Verified reviews

What our learners

4.9 · +100 verified reviews
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« cool, j'ai appris des trucs »

TomFormation AWS — Cloud Practitioner
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« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »

Eva CarpentierFormation LLM en Entreprise — Claude, ChatGPT, Mistral
★★★★★

« la formation dev etait intense mais grave bien. merci Anthony Khelil »

NolanDWWM - Développeur Web et Web Mobile
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« 😊👍 »

AmbreDWWM - Développement Web & Mobile React
★★★★★

« bien 👍 »

Léo BlanchardFormation AWS — DevOps Engineer Professional
★★★★★

« Allan Busi t'es au top, continue comme ça. formation géniale »

MargotFormation Claude & ChatGPT — Comparatif et Cas d'Usage
★★★★★

« cool, j'ai appris des trucs »

TomFormation AWS — Cloud Practitioner
★★★★★

« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »

Eva CarpentierFormation LLM en Entreprise — Claude, ChatGPT, Mistral
★★★★★

« la formation dev etait intense mais grave bien. merci Anthony Khelil »

NolanDWWM - Développeur Web et Web Mobile
★★★★★

« 😊👍 »

AmbreDWWM - Développement Web & Mobile React
★★★★★

« bien 👍 »

Léo BlanchardFormation AWS — DevOps Engineer Professional
★★★★★

« Allan Busi t'es au top, continue comme ça. formation géniale »

MargotFormation Claude & ChatGPT — Comparatif et Cas d'Usage
★★★★★

« cool, j'ai appris des trucs »

TomFormation AWS — Cloud Practitioner
★★★★★

« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »

Eva CarpentierFormation LLM en Entreprise — Claude, ChatGPT, Mistral
★★★★★

« la formation dev etait intense mais grave bien. merci Anthony Khelil »

NolanDWWM - Développeur Web et Web Mobile
★★★★★

« 😊👍 »

AmbreDWWM - Développement Web & Mobile React
★★★★★

« bien 👍 »

Léo BlanchardFormation AWS — DevOps Engineer Professional
★★★★★

« Allan Busi t'es au top, continue comme ça. formation géniale »

MargotFormation Claude & ChatGPT — Comparatif et Cas d'Usage
Read all reviews
Our method

Training quality, guaranteed at every step

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.

Step 1

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.
Step 2

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.

  • Live briefing on goals and team context.
  • Veto right — we swap the trainer for free if needed.
Step 3

Content tailored to your context

No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.

  • Hands-on cases drawn from your stack and projects.
  • Program co-written then validated by your team.
Step 4

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.

  • NPS, knowledge quizzes and skills self-assessment.
  • Satisfaction guarantee: fully satisfied or free rework.

A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.

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