Training Mastering Testing Library: Writing Robust Tests for Your React Applications

$3,465

  • 3 days
  • Onsite
  • 8 people max.
Ref: VCO874
8 people max.
$3,465
In-company rate: from $6,290 for the whole team
On-site and certification exam on quote
3 days
Onsite

Don't let this gap widen

Why this program matters

  • Without mastery of Testing Library, your React tests stay fragile, generating false positives and invisible regressions that undermine application reliability.

  • Developers lose an average of 40% of their time fixing bugs in production, or 15 000 € per month for a team of 5, according to Stack Overflow studies.

  • 75% of critical front-end incidents stem from inadequate tests, exposing the company to customer losses and potential RGPD fines of 20 millions €.

  • Every month without robust tests, your career stagnates while competitors ship faster and without faille.

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

41,121 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

  • Understand the role of tests in the lifecycle of a React application
  • Install and configure Testing Library with React
  • Write, organize, and execute robust functional tests with React Testing Library
  • Adopt best practices for accessibility-oriented and user-centric testing
  • Handle advanced cases: mocks, asynchronous interactions, contexts, and hooks
  • Integrate Testing Library into a CI/CD workflow

Program

Testing Library curriculum: 3 modules over 3 days

Module 1 : Testing Fundamentals with Testing Library

Introduction to testing, Testing Library philosophy ('the user-centric way'), ecosystem overview, first steps: installation in a React project, configuration, test file organization. First test with the render method and exploration of basic assertions.

Module 2 : Writing Effective and Maintainable Tests

Differences between unit, integration, and end-to-end tests, best practices with React Testing Library: query methods (getBy, findBy, queryBy, etc.), simulate user interactions (fireEvent, user-event), verify DOM changes, manipulate state and props in tests, context and provider management, snapshots vs targeted assertions.

Module 3 : Advanced Test Management with Testing Library

Asynchronous tests: dynamic elements, custom hooks and effects, timers and mocks (API, fetch, localStorage), code coverage, test suite structuring strategy, continuous integration (with GitHub Actions, GitLab CI, or CircleCI), effective debugging, long-term test suite evolution and maintenance.

How Testing Library skills are assessed

  • MCQ and case studies at the end of the training
  • Practical exercises for each module, corrected collectively
  • Development of a mini test suite on a provided React application

How the Testing Library course is taught

  • Lectures with live coding demonstrations
  • Numerous interactive practical exercises
  • Case studies on real projects
  • Detailed documentation and links to additional resources

Testing Library training: access and practical arrangements

The Training Mastering Testing Library: Writing Robust Tests for Your React Applications 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 Mastering Testing Library: Writing Robust Tests for Your React Applications 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 Mastering Testing Library: Writing Robust Tests for Your React Applications 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

What can participants do after Mastering Testing Library: Writing Robust Tests for Your React Applications training?+
They can understand the role of tests in the lifecycle of a React application, install and configure Testing Library with React and write, organize, and execute robust functional tests with React Testing Library. Those are the stated objectives of the Mastering Testing Library: Writing Robust Tests for Your React Applications program at Intermediate level, checked by the end-of-session assessment.
What does the Mastering Testing Library: Writing Robust Tests for Your React Applications program cover, day by day?+
Day 1: Testing Fundamentals with Testing Library. Day 2: Writing Effective and Maintainable Tests. Day 3: Advanced Test Management with Testing Library. The Mastering Testing Library: Writing Robust Tests for Your React Applications program runs over 3 days, delivered on site.
How is Mastering Testing Library: Writing Robust Tests for Your React Applications training assessed?+
Assessment relies on MCQ and case studies at the end of the training, practical exercises for each module, corrected collectively and development of a mini test suite on a provided React application. Learni issues a completion certificate together with the individual assessment report at the end of the Mastering Testing Library: Writing Robust Tests for Your React Applications program, which an L&D team can file as evidence.
How much does Mastering Testing Library: Writing Robust Tests for Your React Applications training cost per participant?+
Mastering Testing Library: Writing Robust Tests for Your React Applications training costs $3,465 per participant. For an in-company team, the flat rate starts at $6,290 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 Mastering Testing Library: Writing Robust Tests for Your React Applications training take?+
3 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 Mastering Testing Library: Writing Robust Tests for Your React Applications 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 Mastering Testing Library: Writing Robust Tests for Your React Applications training?+
Good proficiency in JavaScript ES6, basic knowledge of React, and unit testing fundamentals.
Is a certificate issued after Mastering Testing Library: Writing Robust Tests for Your React Applications 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 Mastering Testing Library: Writing Robust Tests for Your React Applications 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