Hello Python, Hi TDD!

Introduction

Hi and welcome to the Python-TDD tutorial where we are gonna learn Python by TDD. It’s more advanced Python which means that you must have basic experience with this language.

So here you will learn and practice how to write custom decorator, iterator, context manager etc. Hope that you will enjoy it.

What is TDD?

TDD (Test Driven Development) - is a software development process that relies on the repetition of a very short development cycle: requirements are turned into very specific test cases, then the software is improved to pass the new tests, only.

_images/tdd.png

TDD.

How to start for TDD

Here are the four steps required to do the TDD which one should remember by heart

  1. Write “enough” failing tests before writing the production code
  2. Write production code to pass those failing tests
  3. Re-factor the code, if required.
  4. GoTo Step — 1

You are lucky

Fortunately for you we have written tests for your tasks. So you will start your cycle from the second step. [step-2, step-3, step-4] <next> [2, 3, 4] <next> [2, 3, 4] …

Module structure

Every module have the next structure:

| module
| ├── answers               (our implementation)
| │   └── program.py
| ├── tests                 (tests)
| │   ├── test_program.py
| ├── program.py            (your implementation)
| ├── instruction.md        (what to do and how to run test)
Folder/File Example Description
*.py program.py All *.py files in the root directory you have to implement.
tests/* test_*.py Tests you have to run without failures.
answers/* program.py Our implementation you can compare with your