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.
1 seat held for the next session
30:00Held for another
Request a call back and an advisor reaches you within 24 business hours, Monday to Saturday.
Trusted by — schools, companies and industrial groups
Every program built with a dedicated engineer
Learning objectives
- Master advanced mocking techniques to simulate complex dependencies
- Develop realistic mocks through certified professional training
- Implement stubbing strategies to optimize test performance
- Design mocks for microservices and asynchronous APIs in enterprise settings
- Optimize test suites using spying and faking for expert-level skills
- Deploy persistent mocks in certified CI/CD environments
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
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.
Don't let this gap widen
Why this program matters
Without mastery of Mocking 2026, your unit tests fail 65% of the time on external dependencies, wasting 30% of development time on unnecessary debugging.
Companies suffer an average of 12 critical incidents per quarter from inadequate mocks, costing up to 50,000€ per failed deployment.
In 2026, 82% of QA recruiters reject profiles without advanced stubbing expertise, blocking promotions and competitiveness.
Every delay widens the gap with agile teams that deploy 40% faster without hidden bugs.
Program
Module 1Mocking 2026 Fundamentals: Simulating External Dependencies (Jest, Vitest, MSW)
Dive into the evolutions of Mocking 2026 with expert environment setup, creating mocks for REST and GraphQL APIs, practical exercises on real network dependencies, using MSW for browser-side interceptions, developing dynamic stubs tailored to concrete business cases, and generating test coverage reports to validate professional skills.
Module 2Advanced Mocking: Stubbing and Spying for Asynchronous Tests (Sinon, Nock)
Deepen stubbing with Sinon.js for timers and promises, implement spies on private methods and Node.js modules, practice on Dockerized microservices, test complex asynchronous flows with awaits and generators, analyze mock performance via integrated profilers, and generate testable deliverables for certified enterprise portfolios.
Module 3Mocking 2026 Strategies: Fakes for Databases and Third-Party Services (Supertest, Prisma mocks)
Design persistent fakes for NoSQL and SQL databases using Prisma and Supertest, simulate AWS/Azure cloud error scenarios, integrate mocks into GitHub Actions pipelines, develop mocked end-to-end tests for full-stack applications, optimize resilience with retry mechanisms, and produce an ongoing project demonstrating production-ready expert skills.
Module 4Mocking Optimization: CI/CD and Maintenance (Playwright mocks, coverage tools)
Deploy mocks in CI/CD with Playwright and Vitest, measure quality using Istanbul and codecov, refactor legacy test suites for Mocking 2026, integrate automated cleanup hooks, simulate multi-platform environments, and conclude with a collective code review and certification plan to boost enterprise skills.
Evaluation method
- Expert multiple-choice quiz for assessing learning outcomes at the end of the training
- Continuous assessment through advanced practical exercises
- Defense of the Mocking 2026 ongoing project in front of the trainer
Learning method
- Courses led by a currently active expert trainer
- Practical exercises on real enterprise cases in mocking
- Progressive ongoing project throughout the training
- Complete course materials provided to each participant
Methods, materials and delivery
The Training Mocking 2026 - Mastering Advanced Unit 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 Mocking 2026 - Mastering Advanced Unit 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 Mocking 2026 - Mastering Advanced Unit 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.
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.
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.
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.
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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FAQ
Frequently asked questions
Which tools are used in Mocking 2026 training?+
Hands-on work runs on jest, vitest, MSW, sinon, nock and supertest. Those tools come from the Mocking 2026 program itself, delivered on site over 4 days, so participants practise on the stack they will use at work.
What can participants do after Mocking 2026 training?+
They can master advanced mocking techniques to simulate complex dependencies, develop realistic mocks through certified professional training and implement stubbing strategies to optimize test performance. Those are the stated objectives of the Mocking 2026 program at Expert level, checked by the end-of-session assessment.
What does the Mocking 2026 program cover, day by day?+
Day 1: Mocking 2026 Fundamentals: Simulating External Dependencies (Jest, Vitest, MSW). Day 2: Advanced Mocking: Stubbing and Spying for Asynchronous Tests (Sinon, Nock). Day 3: Mocking 2026 Strategies: Fakes for Databases and Third-Party Services (Supertest, Prisma mocks). Day 4: Mocking Optimization: CI/CD and Maintenance (Playwright mocks, coverage tools). The Mocking 2026 program runs over 4 days, delivered on site.
How is Mocking 2026 training assessed?+
Assessment relies on expert multiple-choice quiz for assessing learning outcomes at the end of the training, continuous assessment through advanced practical exercises and defense of the Mocking 2026 ongoing project in front of the trainer. Learni issues a completion certificate together with the individual assessment report at the end of the Mocking 2026 program, which an L&D team can file as evidence.
How much does Mocking 2026 training cost per participant?+
$4,620 (USD) per participant. A detailed quote is sent within one business day, and team pricing applies from the second participant.
How long does Mocking 2026 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 Mocking 2026 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 Mocking 2026 training?+
Advanced mastery of Jest/Vitest, TypeScript, React/Node.js frameworks, and complex unit tests.
Is a certificate issued after Mocking 2026 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.
On-site & remote
This training across cities
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