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282 lines
8.3 KiB
282 lines
8.3 KiB
<!doctype html> |
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<title>BDD em Python</title> |
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<meta name="description" content="Colocando uma aplicação Flask em produção em 40 minutos (ou menos)"> |
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<meta name="author" content="Julio Biason"> |
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<body> |
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<div class="reveal"> |
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<div class="slides"> |
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<section> |
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<section data-background="_images/bdd.jpg" data-header> |
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<h1 class="semi-opaque"> |
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BDD em Python |
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</h1> |
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</section> |
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</section> |
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<section> |
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<section> |
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<img src="_images/avatar-20170726.png" alt="Me" style="float:left;width:200px;" class="no-border"> |
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<div> |
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<ul class="empty"> |
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<li>Júlio Biason</li> |
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<li>Azion Technologies<img src="_images/azion-logo.png" alt="Azion logo" class='company-logo'></li> |
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<li>@juliobiason</li> |
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<li>julio.biason@gmail.com</li> |
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<li><a href="http://presentations.juliobiason.net">http://presentations.juliobiason.net</a></li> |
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</ul> |
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</div> |
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</section> |
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</section> |
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<section> |
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<section> |
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<img src="_images/bdd-robot.png" alt="" style="background-color:black"/> |
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<img src="_images/bdd-behave.png" alt=""/> |
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</section> |
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</section> |
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<section> |
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<section> |
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<h2>Gherkin</h2> |
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<p style="text-align:left"> |
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Given <span class="fragment">Definição do ambiente</span> <br/> |
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When <span class="fragment">O teste</span><br/> |
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Then <span class="fragment">Validação do teste</span><br/> |
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</p> |
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<aside class="notes"> |
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Esse é o formato do "Gherkin", popularizado pelo framework |
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"Cucumber" de Ruby. |
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"Given" define o ambiente do teste; "Dado que" (eu tenho isso)... |
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"When" define o teste em si; "quando" (... eu fizer essa coisa)... |
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"Then" define a validação; "então" (... isso deve ter acontecido) |
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</aside> |
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</section> |
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</section> |
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<section> |
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<section> |
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<h2>Código sendo testado</h2> |
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<pre><code> |
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#!/usr/bin/env python |
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# -*- encoding: utf-8 -*- |
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"""This is a sample code that simulates a user being created.""" |
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from __future__ import print_function |
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import argparse |
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import json |
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from collections import Counter |
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from unicodedata import category |
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LOWERCASE_CHARS = "Ll" |
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UPCASE_CHARS = "Lu" |
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NUMBERS = "Nd" |
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class UserCreationError(Exception): |
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"""Base class for all exceptions in this module.""" |
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pass |
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class PasswordIsNotStrongEnough(UserCreationError): |
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"""The password used is not strong enough.""" |
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pass |
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class UserAlreadyExists(UserCreationError): |
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"""The user already exists in the database.""" |
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pass |
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def password_is_strong(password): |
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"""Check if the password have enough strength.""" |
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number_of = Counter(category(ch) for ch in password) |
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return (number_of[LOWERCASE_CHARS] >= 1 and |
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number_of[UPCASE_CHARS] >= 2 and |
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number_of[NUMBERS] >= 1 and |
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len(password) >= 12) |
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def get_users(): |
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"""Retrieve the list of users in the system.""" |
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data = {} |
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try: |
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with open('users.json') as origin: |
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data = json.load(origin) |
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except IOError: |
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# File does not exist, so we just assume it's empty |
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pass |
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return data |
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def save_users(user_list): |
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"""Save the user list back to the 'database'.""" |
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with open('users.json', 'w') as target: |
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json.dump(user_list, target) |
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return |
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def create_user(user, password): |
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"""'Create' and user.""" |
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if not password_is_strong(password.decode('utf-8')): |
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raise PasswordIsNotStrongEnough |
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users = get_users() |
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if user in users: |
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raise UserAlreadyExists |
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users[user] = password |
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save_users(users) |
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return |
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def main(): |
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"""Expose the functions back in command line options.""" |
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parser = argparse.ArgumentParser() |
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parser.add_argument('-u', '--user', |
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dest='user', |
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help='Username to be created', |
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required=True) |
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parser.add_argument('-p', '--password', |
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dest='password', |
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help='Password for the user', |
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required=True) |
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args = parser.parse_args() |
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try: |
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create_user(args.user, args.password) |
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except PasswordIsNotStrongEnough: |
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print("That password is not strong enough") |
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except UserAlreadyExists: |
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print("Username already used") |
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else: |
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print("User created") |
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return |
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if __name__ == "__main__": |
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main() |
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</code></pre> |
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</section> |
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</section> |
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<section> |
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<section> |
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<h2>Robot Framework</h2> |
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</section> |
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</section> |
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<section> |
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<section> |
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<h2>Behave</h2> |
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</section> |
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</section> |
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<section data-background='_images/thats-all-folks.jpg'> |
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<section> |
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<h1 class="fragment semi-opaque">Perguntas?</h1> |
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</section> |
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</section> |
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</div> |
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</div> |
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