Training Testing Library - Reliable and Maintainable React Tests

$4,620

  • 4 days
  • Onsite
  • 10 people max.
Ref: BPF937
10 people max.
$4,620
In-company rate: from $7,865 for the whole team
On-site and certification exam on quote
4 days
Onsite

Don't let this gap widen

Why this program matters

  • Without mastery of Testing Library, 40% of React bugs land in production, wasting up to 30% of developer time on urgent debug according to Stack Overflow.

  • Untested apps accumulate explosive technical debt, threatening 25% of CI/CD deployments and exposing companies to customer losses estimated at 100k€ annually per major incident.

  • Your career stagnates without modern testing skills, while juniors outperform with reliable test suites.

  • Invest now to secure your releases and boost your professional value.

Célian Lebacle, Learni trainer · Web & mobile expert
Célian Lebacle

Learni trainer · Web & mobile expert

73%productivity gap
×3cost of inaction
Flag of the United StatesBuilt for US teams
Payment by wire transferEnhanced confidentialityPerfect for companies with 50 to 500 employeesScheduling to fit any time zone

Trusted by — schools, companies and industrial groups

41,124 programs · 25 countries

  • Aptar
  • ArcelorMittal
  • Equans
  • EDF
  • Ubisoft
  • Microsoft
  • Atos

Every program built with a dedicated engineer

  • OpenAI
  • Anthropic
  • Mistral AI
  • NVIDIA
  • Google
  • Amazon Web Services
  • Microsoft Dynamics 365
  • Salesforce
  • ServiceNow
  • SAP
  • Oracle
  • Cisco
  • Fortinet
  • Palo Alto Networks
  • Aruba
  • VMware
  • Red Hat
  • Databricks
  • Snowflake
  • OVHcloud
  • Notion
  • AMD
  • Apple

Companies: Aptar, ArcelorMittal, Equans, EDF, Ubisoft, Microsoft and Atos.

Testing Library training objectives

  • Master user-centric queries from Testing Library for realistic tests.
  • Develop efficient unit and integration tests.
  • Implement advanced mocks and event handlers in real-world scenarios.
  • Optimize code coverage and maintainability of React test suites.
  • Design accessible and performant tests tailored to professional projects.
  • Integrate Testing Library into CI/CD pipelines for continuous delivery.

Program

Testing Library curriculum: 4 modules over 4 days

Module 1 : Testing Library Fundamentals: queries and render (React, DOM, practical exercises)

Discover the user-centric principles of Testing Library, set up the environment with Jest and React Testing Library, practice byRole, byLabelText, and byText queries on simple components, perform rendering and basic interaction tests, analyze common errors through concrete cases, produce your first validated tests in pairs to consolidate essential skills in 7 intensive hours.

Module 2 : Advanced Testing Library Tests: events and forms (user events, validation, async)

Dive into fireEvent and userEvent to simulate realistic clicks, inputs, and focus, test complex forms with validation, handle async states with waitFor and findBy, apply assertions on accessible DOM, build integration test suites on a complete React app, debug with built-in debugging, deliver coverage reports to evaluate effectiveness.

Module 3 : Mocking and Custom Hooks in Testing Library: APIs and dependencies (msw, viemocks, hooks)

Master API mocking with MSW for isolated tests, mock custom hooks and React contexts, integrate Testing Library with third-party libraries like React Router, practice network error and loading state scenarios, optimize tests for performance, collaborate in groups on a simulated e-commerce project, generate tested and documented deliverables ready for the enterprise.

Module 4 : Best Practices and CI/CD for Testing Library: refactoring and deployment (GitHub Actions, coverage)

Adopt maintainable patterns and test refactoring, configure minimum coverage thresholds, integrate with GitHub Actions and CI/CD pipelines, analyze advanced metrics with Allure, conduct team test code reviews, prepare for internal certification via a final challenge, export your professional test portfolio for immediate enterprise application.

How Testing Library skills are assessed

  • Daily interactive quizzes and coding challenges to validate learning outcomes.
  • Final team project with code review and personalized feedback.
  • Qualiopi attestation based on mastery of Testing Library competencies.

How the Testing Library course is taught

  • Hands-on approach with 70% practice on real code and progressive exercises.
  • Classes limited to 10 participants for individualized follow-up.
  • Agile methodology inspired by professional workplace sprints.
  • Post-training resources: video replays, Git repo, and 30-day support.

Testing Library training: access and practical arrangements

The Training Testing Library - Reliable and Maintainable React Tests 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 - Reliable and Maintainable React 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 - Reliable and Maintainable React 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

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.

Our method

How Learni guarantees the quality of your Testing Library training

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.

A child walking to school with a backpack
Our social commitment

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.

  • Backpack, notebooks and essential supplies
  • Distributed through our partner charities
  • Included, at no extra cost to you
Enroll and offer a kit
FAQ

Testing Library: frequently asked questions

Which tools are used in Testing Library training?+
Hands-on work runs on react, DOM, practical exercises, user events, validation and async. Those tools come from the Testing Library program itself, delivered on site over 4 days, so participants practise on the stack they will use at work.
What can participants do after Testing Library training?+
They can master user-centric queries from Testing Library for realistic tests, develop efficient unit and integration tests and implement advanced mocks and event handlers in real-world scenarios. Those are the stated objectives of the Testing Library program at Intermediate level, checked by the end-of-session assessment.
What does the Testing Library program cover, day by day?+
Day 1: Testing Library Fundamentals: queries and render (React, DOM, practical exercises). Day 2: Advanced Testing Library Tests: events and forms (user events, validation, async). Day 3: Mocking and Custom Hooks in Testing Library: APIs and dependencies (msw, viemocks, hooks). Day 4: Best Practices and CI/CD for Testing Library: refactoring and deployment (GitHub Actions, coverage). The Testing Library program runs over 4 days, delivered on site.
How is Testing Library training assessed?+
Assessment relies on daily interactive quizzes and coding challenges to validate learning outcomes, final team project with code review and personalized feedback and qualiopi attestation based on mastery of Testing Library competencies. Learni issues a completion certificate together with the individual assessment report at the end of the Testing Library program, which an L&D team can file as evidence.
How much does Testing Library training cost per participant?+
Testing Library training costs $4,620 per participant. For an in-company team, the flat rate starts at $7,865 for the whole group, up to 8 people. The detailed quote, sent within one business day, adjusts the amount to the format and how far the syllabus is tailored to your team.
How long does Testing Library training take?+
4 days, available live online (US time zones) or on-site at your offices. Half-day tracks spread over several weeks are possible so the team stays operational.
Who pays for Testing Library training?+
Most US teams pay directly through their company L&D or training budget. Learni invoices in US dollars and accepts bank transfer (ACH/wire) or card, with volume pricing for teams. A purchase order is welcome.
What do participants need to know before Testing Library training?+
Mastery of React and ES6+ JavaScript, experience with Jest or another basic testing framework, knowledge of DOM and functional components.
Is a certificate issued after Testing Library training?+
Yes. A Learni completion certificate is issued, along with the individual evaluation report. Learni is a certified training provider and prepares for third-party certifications, but does not award them itself.
Does Learni provide the equipment for Testing Library training?+
No. A computer and a stable internet connection are required for each participant. Learni provides the learning platform, the trainer and all course materials.
Your professional training, anywhere

Let's build your Testing Library learning path.

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

Reply within 24h · Vetted experts · USD invoicing · W-9 available
On-site & remote

Testing Library training in your city

Available on-site and remotely. Pick your city to see the local training center.

Share in 2 clicks