Mocking Training - Optimizing Advanced Unit Tests

$4,620

  • 4 days
  • Onsite
  • 10 people max.
Ref: ZDT430
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 advanced mocking mastery, 65% of bugs escape unit tests and land in production, costing an average of 10 000€ per major incident according to Gartner.

  • Teams lose 40% of time on manual debugging of non-mocked dependencies, slowing agile development cycles.

  • In 2024, 82% of DevOps recruiters reject resumes without isolated testing expertise, risking career stagnation and company competitiveness loss against competitors 3x faster.

  • Master mocking to avoid these costly pitfalls right now.

Imed BEN AMOR, Learni trainer · Development expert
Imed BEN AMOR

Learni trainer · Development 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

40,841 programs · 25 countries

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

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 and Microsoft.

Mocking training objectives

  • Master advanced mocking techniques for professional, certifiable unit tests
  • Develop realistic mocks for APIs and external services in enterprise contexts
  • Implement mocking for databases and complex modules with TypeScript
  • Optimize test suites for maximum coverage and high performance
  • Design mocking strategies integrated into CI/CD for secure deployments
  • Acquire skills in spying and stubbing for effective debugging
  • Deploy scalable mocked tests in professional projects

Mocking curriculum: 4 modules over 4 days

Module 1 : Advanced Mocking Fundamentals: Spies, Stubs, and Fakes with Jest/Vitest (Tools, Configurations, Real Cases)

Dive into advanced mocking techniques by installing Jest and Vitest on a professional TypeScript project, create spies to monitor complex function calls, develop stubs to simulate unpredictable behaviors, create fakes for external dependencies, apply these tools to real enterprise cases like user authentication, and conclude with practical exercises including personalized code review to solidify skills in reliable isolated testing.

Module 2 : Mocking APIs and External Services: Realistic Simulations (MSW, nock, axios-mock-adapter)

Simulate REST and GraphQL APIs with MSW for dynamic and conditional responses, integrate nock to intercept HTTP requests in Node.js, configure axios-mock-adapter on real front-end projects, test network error and timeout scenarios, develop persistent mocks for integration chains, analyze enterprise cases like secure payments, and produce production-ready testable deliverables with a focus on external service robustness.

Module 3 : Mocking Databases and Modules: TypeORM/Prisma Integration (Persistent Mocks, Seeding)

Create advanced mocks for TypeORM and Prisma by simulating complex SQL queries, implement mocked seeding for realistic datasets, manage relationships and transactions with custom factories, integrate Redis or MongoDB mocks for caches and NoSQL, apply to a red-thread enterprise project involving microservices, debug common mock leaks, and generate coverage reports to validate perfect unit test isolation.

Module 4 : Mocking Best Practices and CI/CD: Performance Optimization (Coverage, GitHub Actions, fastify)

Optimize mocked test suites for ultra-fast execution with advanced patterns, integrate mocking into GitHub Actions and Jenkins for smooth CI/CD pipelines, analyze coverage with Istanbul and configure professional thresholds, address anti-patterns like excessive global mocks, deploy on a scalable enterprise case, produce a personalized optimization plan, and conclude with a quiz session and presentation to certify new advanced testing skills.

How Mocking skills are assessed

  • Certifying multiple-choice quiz to validate learning outcomes at the end of the training
  • Continuous assessment through practical exercises and a red-thread project
  • Individual presentation of mocking applied to an enterprise case

How the Mocking course is taught

  • Sessions led by an active professional mocking expert
  • Practical exercises on real enterprise and open-source projects
  • Progressive red-thread mocked project over 4 days
  • Detailed course materials and permanent online resources

Mocking training: access and practical arrangements

The Mocking Training - Optimizing 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 Mocking Training - Optimizing 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 Mocking Training - Optimizing 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.

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 Mocking 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

Mocking: frequently asked questions

Which tools are used in Mocking Training training?+
Hands-on work runs on tools, configurations, real Cases, MSW, nock and axios-mock-adapter. Those tools come from the Mocking Training 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 Training training?+
They can master advanced mocking techniques for professional, certifiable unit tests, develop realistic mocks for APIs and external services in enterprise contexts and implement mocking for databases and complex modules with TypeScript. Those are the stated objectives of the Mocking Training program at Advanced level, checked by the end-of-session assessment.
What does the Mocking Training program cover, day by day?+
Day 1: Advanced Mocking Fundamentals: Spies, Stubs, and Fakes with Jest/Vitest (Tools, Configurations, Real Cases). Day 2: Mocking APIs and External Services: Realistic Simulations (MSW, nock, axios-mock-adapter). Day 3: Mocking Databases and Modules: TypeORM/Prisma Integration (Persistent Mocks, Seeding). Day 4: Mocking Best Practices and CI/CD: Performance Optimization (Coverage, GitHub Actions, fastify). The Mocking Training program runs over 4 days, delivered on site.
How is Mocking Training training assessed?+
Assessment relies on certifying multiple-choice quiz to validate learning outcomes at the end of the training, continuous assessment through practical exercises and a red-thread project and individual presentation of mocking applied to an enterprise case. Learni issues a completion certificate together with the individual assessment report at the end of the Mocking Training program, which an L&D team can file as evidence.
How much does Mocking Training training cost per participant?+
Mocking Training 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 Mocking Training 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 Training 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 Training training?+
Mastery of unit testing with Jest or Mocha, advanced JavaScript/TypeScript, professional development experience.
Is a certificate issued after Mocking Training 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 Mocking Training 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

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