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Training Jest - Optimizing Advanced Automated Tests

Ref: AHH981
10 people max.
7000€ 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
5 journées
distanciel

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Learning objectives

  • Master advanced Jest configurations for professional environments
  • Develop complex mocks and spies to simulate real dependencies
  • Implement scalable integration and E2E tests in enterprise settings
  • Optimize code coverage and Jest test performance
  • Design TDD/BDD test suites suited for critical projects
  • Deploy Jest in CI/CD for certified competency automation

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.

Allan Busi
Allan Busi

Learni Trainer · Expert

73%productivity gap
×3cost of inaction

Program

Module 1Jest Configuration: Expert Setups and Professional Environments (Babel, TypeScript, Coverage)

Dive into advanced Jest configuration for enterprise projects, install and configure Babel, TypeScript, and coverage plugins, migrate an existing setup to Jest by practicing on a real codebase, test custom matchers, generate detailed reports, and produce an optimized production-ready config file with guided exercises and trainer code review.

Module 2Jest Mocks and Spies: Realistic Simulation of Dependencies (API, Modules, Timers)

Master Jest's manual and automatic mocks to perfectly isolate your tests, simulate API calls with fetch-mock, manage timers and asynchronous modules, implement spies to track complex interactions, apply these techniques to concrete enterprise cases like Node.js services, and validate your mocks via advanced assertions for reliable and maintainable tests.

Module 3Jest Integration Tests: Database Connections and Components (Supertest, React Testing Library)

Build robust integration tests with Jest by connecting to mocked or real databases via Supertest, integrate React Testing Library to test user-centric components, manage global states with Redux and Context, perform partial E2E scenarios on full-stack apps, analyze memory leaks, and deliver a functional integration project with included performance metrics.

Module 4Jest Performance and Coverage: CI/CD Optimization (Jenkins, GitHub Actions, Thresholds)

Optimize the speed and coverage of your Jest suites by analyzing bottlenecks with built-in profilers, set mandatory coverage thresholds, integrate Jest into CI/CD pipelines like GitHub Actions or Jenkins, parallelize tests for ultra-fast executions, test across multiple environments, and deploy an automated workflow quantifying time savings for your professional teams.

Module 5Jest Best Practices: Advanced TDD and Certifying Project (Refactoring, Enterprise Patterns)

Apply best TDD and BDD practices with Jest on an enterprise red-thread project, refactor legacy code for 100% coverage, integrate smart snapshots and visual tests, handle critical edge-case errors, present your solution in a live demo defense, and leave with a certifying portfolio demonstrating your expert skills in automated testing.

Evaluation method

  • Expert MCQ to validate learning outcomes at the end of the training
  • Continuous evaluation through exercises and practical challenges
  • Defense of the Jest red-thread project with code review

Learning method

  • Courses led by an active expert Jest trainer
  • Practical exercises on real business cases
  • Progressive red-thread project throughout the training
  • Complete course materials provided to each participant

Methods, materials and delivery

The Training Jest - Optimizing Advanced Automated 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 Jest - Optimizing Advanced Automated 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 Jest - Optimizing Advanced Automated 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
★★★★★

« 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
★★★★★

« 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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