Learning path

The path

Each stage mixes topics from several subjects. The basics of TDD come first, so you practice everything else by doing TDD.

1. 1

   Stage 1

   TDD and objects

   You start with the basics of TDD and use it from day one in simple katas. At the same time you learn to think in objects and to write clean code.

   Testing

   TDD Basics · TDD as if you meant it · ZOMBIES · Test Structure · FIRST Principles · Parametrized Tests · Nested Tests · Transformation Priority Premise · Single Assert Rule

   Programming Languages

   Object-Oriented Programming

   Design Principles

   Clean Code · Encapsulation · Information Hiding

   Refactoring

   Refactoring Basics · Code Smells · Basic Refactorings

   KatasBowlingFibonacciFizz-BuzzLeap YearGame of LifeMars Rover

   CoursesIntroduction to TDDIntroduction to OOP
2. 2

   Stage 2

   Design principles

   With TDD already in place, the katas get harder and help you practice the principles that make a design easy to change.

   Design Principles

   Tell, Don't Ask · Law of Demeter · 4 Rules of Simple Design · Command Query Separation · Uniform Access Principle · YAGNI · DRY · Balanced Abstraction Principle · Law of Leaky Abstractions · Principle of Least Astonishment · SOLID · Coupling · Cohesion · Software Design Odors · Design by Contract · ETC · Connascence · Composition over Inheritance

   Refactoring

   Encapsulation Refactorings · Moving Features Refactorings · Organizing Data Refactorings · Conditional Logic Refactorings · API Refactorings · Inheritance Refactorings

   Testing

   Test Data Builders · Object Mother · Test Fixtures · Test DSL

   KatasPoker HandsYahtzeeRPG Combat

   CoursesFundamental principles of software design
3. 3

   Stage 3

   Design patterns

   Well-known solutions to recurring design problems. You practice them with TDD to recognize when they simplify the code and when they complicate it.

   Design Patterns

   Introduction · Creational Patterns: Factory Method, Abstract Factory, Builder, Prototype · Structural Patterns: Adapter, Bridge, Composite, Decorator, Façade, Proxy · Behavioral Patterns: Chain of Responsibility, Command, Iterator, Mediator, Memento, Observer, State, Strategy, Template Method, Visitor, Null Object · Double Dispatch

   CoursesDesign patterns
4. 4

   Stage 4

   Outside-In and legacy code

   Test doubles, Outside-In TDD and how to add tests to and refactor code that wasn't written with that in mind.

   Testing

   Test Doubles · Mockist TDD · Classical Outside-In · Integration Tests · End-to-End Tests · Humble Object · Walking Skeleton · Test Pyramid · Types of Tests · Legacy Code

   KatasGilded RoseUgly TriviaZombie Survivor

   CoursesAdvanced TDD
5. 5

   Stage 5

   Architecture

   How to separate the domain from the delivery mechanisms and the infrastructure.

   Architecture

   Clean Architecture · Hexagonal Architecture · Interaction Driven Design · UI Architectures

   Design Patterns

   Enterprise Patterns

   KatasCorporate Hotel Booking

   CoursesClean Architecture
6. 6

   Stage 6

   Technical practices and agile

   How a team works to deliver quality software in a sustainable way: XP, continuous integration and delivery, and agility.

   Technical Practices

   Extreme Programming Basics · Automated Testing · Test First · Refactoring · TDD · Continuous Integration · Continuous Delivery · Pair/Mob Programming · Sustainable Pace

   Agile

   Agile Basics · Agile Culture · Scrum · Agile Economics · Lean · Kanban · NoEstimates · User Stories · Technical Debt · Story Mapping · Elevator Pitch · Teal Organizations · Software Craftsmanship

   CoursesIntroduction to technical excellence practicesIntroduction to AgileAgile economicsLean Software DevelopmentSoftware Craftsmanship
7. 7

   Stage 7

   Domain-Driven Design

   Modeling complex domains together with the business, from strategic design to tactical patterns.

   Domain-Driven Design

   Strategic DDD · Knowledge Crunching · Bounded Context Integration · Value Objects · Entities · Domain Services · Domain Events · Aggregates · Factories · Repositories · Event Sourcing · Application Services · DDD UI · CQRS · Reporting

   KatasMastermind

   CoursesStrategic Domain-Driven DesignTactical Domain-Driven Design
8. 8

   Stage 8

   Architecture at scale

   How a system is organized beyond a single application: monoliths, microservices, event-driven architectures and how to scale.

   Macro Architecture

   Monoliths · Microservices Basics · Microservices Integration · User Interfaces · Splitting Monoliths · Scaling Microservices · Layered Architecture · Microkernel Architecture · Event Driven Architecture · Serverless · Cloud Native

   Testing

   Performance & Load Testing

9. Final project

   An X-like social network, from the console to the web and mobile, where you apply everything together.

   View the kata description

In parallel

Habits and skills you work on throughout the whole path.

Computing foundations

The technical base, to complete at your own pace.