Code club on TDD & BDD.

02-tdd-bdd.md

Test Driven Development (TDD)

https://en.wikipedia.org/wiki/Test-driven_development#Test-driven_development_cycle

1. Write a test
2. Write your code so the tests pass
3. Refactor your code so it isn't 💩
4. GOTO 1

Behaviour-driven Development (BDD)

https://en.wikipedia.org/wiki/Behavior-driven_development#Behavioral_specifications

BDD tests are written in a language called Ghurkin. There are lots of tools and frameworks in almost every language that can process files written in Ghurkin.

For Python pytest-bdd looks OK, there is also behave.

duckduckgo.feature

Feature: Search duckduckgo.com

Scenario: Search for a term
  Given I search for <search_term>
  Then the first result should link to <url>

  Examples:
    | search_term     | url .          |
    | Financial Times | www.ft.com     |
    | Google          | www.google.com |

test_duckduckgo.py

from pytest_bdd import scenario, given, when, then
import pytest
import requests

@scenario('duckduckgo.feature', 'Search for a term')
def test_search():
    pass

@given("I search for <search_term>")
def search_request(search_term):
    return requests.get('https://duckduckgo.com/html/?q=%s' % search_term)

@then("the first result should link to <url>")
def assert_first_search_result_url(search_request, url):
    assert search_request.status_code == 200
    assert url in search_request.text