learn-go-with-tests README

The project's README from github.com/quii/learn-go-with-tests. As one markdown file: README.md.

Learn Go with Tests

Art by Denise

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I am proud to offer this resource for free, but if you wish to give some appreciation:

Why

Table of contents

Go fundamentals

  1. Install Go - Set up environment for productivity.
  2. Hello, world - Declaring variables, constants, if/else statements, switch, write your first go program and write your first test. Sub-test syntax and closures.
  3. Integers - Further Explore function declaration syntax and learn new ways to improve the documentation of your code.
  4. Iteration - Learn about for and benchmarking.
  5. Arrays and slices - Learn about arrays, slices, len, varargs, range and test coverage.
  6. Structs, methods & interfaces - Learn about struct, methods, interface and table driven tests.
  7. Pointers & errors - Learn about pointers and errors.
  8. Maps - Learn about storing values in the map data structure.
  9. Dependency Injection - Learn about dependency injection, how it relates to using interfaces and a primer on io.
  10. Mocking - Take some existing untested code and use DI with mocking to test it.
  11. Concurrency - Learn how to write concurrent code to make your software faster.
  12. Select - Learn how to synchronise asynchronous processes elegantly.
  13. Reflection - Learn about reflection
  14. Sync - Learn some functionality from the sync package including WaitGroup and Mutex
  15. Context - Use the context package to manage and cancel long-running processes
  16. Intro to property based tests - Practice some TDD with the Roman Numerals kata and get a brief intro to property based tests
  17. Maths - Use the math package to draw an SVG clock
  18. Reading files - Read files and process them
  19. Templating - Use Go's html/template package to render html from data, and also learn about approval testing
  20. Generics - Learn how to write functions that take generic arguments and make your own generic data-structure
  21. Revisiting arrays and slices with generics - Generics are very useful when working with collections. Learn how to write your own Reduce function and tidy up some common patterns.

Build an application

Now that you have hopefully digested the Go Fundamentals section you have a solid grounding of a majority of Go's language features and how to do TDD.

This next section will involve building an application.

Each chapter will iterate on the previous one, expanding the application's functionality as our product owner dictates.

New concepts will be introduced to help facilitate writing great code but most of the new material will be learning what can be accomplished from Go's standard library.

By the end of this, you should have a strong grasp as to how to iteratively write an application in Go, backed by tests.

Testing fundamentals

Covering other subjects around testing.

Questions and answers

I often run in to questions on the internets like

How do I test my amazing function that does x, y and z

If you have such a question raise it as an issue on github and I'll try and find time to write a short chapter to tackle the issue. I feel like content like this is valuable as it is tackling people's real questions around testing.

Meta / Discussion

Contributing

Background

I have some experience introducing Go to development teams and have tried different approaches as to how to grow a team from some people curious about Go into highly effective writers of Go systems.

What didn't work

Read the book

An approach we tried was to take the blue book and every week discuss the next chapter along with the exercises.

I love this book but it requires a high level of commitment. The book is very detailed in explaining concepts, which is obviously great but it means that the progress is slow and steady - this is not for everyone.

I found that whilst a small number of people would read chapter X and do the exercises, many people didn't.

Solve some problems

Katas are fun but they are usually limited in their scope for learning a language; you're unlikely to use goroutines to solve a kata.

Another problem is when you have varying levels of enthusiasm. Some people just learn way more of the language than others and when demonstrating what they have done end up confusing people with features the others are not familiar with.

This ends up making the learning feel quite unstructured and ad hoc.

What did work

By far the most effective way was by slowly introducing the fundamentals of the language by reading through go by example, exploring them with examples and discussing them as a group. This was a more interactive approach than "read chapter x for homework".

Over time the team gained a solid foundation of the grammar of the language so we could then start to build systems.

This to me seems analogous to practicing scales when trying to learn guitar.

It doesn't matter how artistic you think you are, you are unlikely to write good music without understanding the fundamentals and practicing the mechanics.

What works for me

When I learn a new programming language I usually start by messing around in a REPL but eventually, I need more structure.

What I like to do is explore concepts and then solidify the ideas with tests. Tests verify the code I write is correct and documents the feature I have learned.

Taking my experience of learning with a group and my own personal way I am going to try and create something that hopefully proves useful to other teams. Learning the fundamentals by writing small tests so that you can then take your existing software design skills and ship some great systems.

Who this is for

What you'll need

Feedback

MIT license

Logo is by egonelbre What a star!

learn-go-with-tests (quii/learn-go-with-tests)

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23.9K ·GitHub
Learn-go-with-tests
Что это такое?Это бесплатная книга, которая учит языку программирования Go на примере написания тестов до кода, по методике разработки через тесты (TDD).
Это книга или библиотека кода?Это письменная книга-руководство, доступная на Gitbook, в формате EPUB или PDF. Она состоит из глав с примерами кода и упражнениями, которые вы выполняете по ходу чтения, а не библиотека, которую нужно подключать в проект.
С чего начать чтение и выполнение примеров?Читайте главы по порядку на Gitbook (или скачайте EPUB/PDF) и сами пишите примеры кода в текстовом редакторе, запуская тесты по ходу работы.
Что нужно для начала?Нужен только компьютер с установленным Go, текстовый редактор, базовые знания программирования (if, переменные, функции) и умение работать в терминале.
Книга уже закончена?Нет, автор прямо пишет, что книга находится в работе и продолжает пополняться на основе вопросов читателей и их вкладов.
Для кого эта книга?Она рассчитана на тех, кто впервые берётся за Go, а также на тех, кто уже знает Go, но хочет освоить именно TDD.
Почему автор написал эту книгу, а не порекомендовал существующую книгу по Go?Автор пробовал читать подробную книгу по Go группой и решать ката вместе с командой, но оба подхода показались ему слишком медленными или неструктурированными. Написание небольших тестов для закрепления понятий сработало лучше всего, поэтому он построил этот материал вокруг такого подхода.
Есть ли эта книга на языках, кроме английского?Да, существуют переводы, созданные сообществом, включая китайский, португальский, японский, французский, корейский, турецкий, персидский, нидерландский, вьетнамский и русский.
Можно ли задать вопрос о темах тестирования, которых пока нет в книге?Да, можно создать issue на GitHub с описанием вашего вопроса о тестировании, и автор может написать новую главу, чтобы его раскрыть.
Какие темы книга охватывает помимо основ?В ней есть главы о вызовах exec операционной системы, пользовательских типах ошибок, io.Reader с поддержкой контекста и отмены, тестировании обработчиков HTTP, а также мета-глава об антипаттернах TDD.
What are similar projects?the-way-to-go_ZH_CN, IntelliJ-IDEA-Tutorial, ultimate-go, python-guide, rust-learning, build-web-application-with-golang, open-source-cs, RustTraining
Which topics is it in?test-driven-development, tdd, curriculum, programming, computer-science, book, golang, reference, beginner-friendly, testing, guide, learning
Creator
quii
Size
9.5 MB
Stars
23.9K
Updated
CommitAug 26Release17.0.0Aug 17
Age
8y
Commits · 90 Days