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+ + BDD em Python +
+
+
+
+
+ -
+
- Júlio Biason +
- Azion Technologies
+ - @juliobiason +
- julio.biason@gmail.com +
- http://presentations.juliobiason.net +
+
+ Gherkin
+ +
+ Given Definição do ambiente
+ When O teste
+ Then Validação do teste
+
Código sendo testado
+ +
+#!/usr/bin/env python
+# -*- encoding: utf-8 -*-
+
+"""This is a sample code that simulates a user being created."""
+
+from __future__ import print_function
+
+import argparse
+import json
+
+from collections import Counter
+from unicodedata import category
+
+LOWERCASE_CHARS = "Ll"
+UPCASE_CHARS = "Lu"
+NUMBERS = "Nd"
+
+
+class UserCreationError(Exception):
+ """Base class for all exceptions in this module."""
+ pass
+
+
+class PasswordIsNotStrongEnough(UserCreationError):
+ """The password used is not strong enough."""
+ pass
+
+
+class UserAlreadyExists(UserCreationError):
+ """The user already exists in the database."""
+ pass
+
+
+def password_is_strong(password):
+ """Check if the password have enough strength."""
+ number_of = Counter(category(ch) for ch in password)
+ return (number_of[LOWERCASE_CHARS] >= 1 and
+ number_of[UPCASE_CHARS] >= 2 and
+ number_of[NUMBERS] >= 1 and
+ len(password) >= 12)
+
+
+def get_users():
+ """Retrieve the list of users in the system."""
+ data = {}
+ try:
+ with open('users.json') as origin:
+ data = json.load(origin)
+ except IOError:
+ # File does not exist, so we just assume it's empty
+ pass
+ return data
+
+
+def save_users(user_list):
+ """Save the user list back to the 'database'."""
+ with open('users.json', 'w') as target:
+ json.dump(user_list, target)
+ return
+
+
+def create_user(user, password):
+ """'Create' and user."""
+ if not password_is_strong(password.decode('utf-8')):
+ raise PasswordIsNotStrongEnough
+
+ users = get_users()
+ if user in users:
+ raise UserAlreadyExists
+
+ users[user] = password
+ save_users(users)
+ return
+
+
+def main():
+ """Expose the functions back in command line options."""
+ parser = argparse.ArgumentParser()
+ parser.add_argument('-u', '--user',
+ dest='user',
+ help='Username to be created',
+ required=True)
+ parser.add_argument('-p', '--password',
+ dest='password',
+ help='Password for the user',
+ required=True)
+ args = parser.parse_args()
+ try:
+ create_user(args.user, args.password)
+ except PasswordIsNotStrongEnough:
+ print("That password is not strong enough")
+ except UserAlreadyExists:
+ print("Username already used")
+ else:
+ print("User created")
+ return
+
+
+if __name__ == "__main__":
+ main()
+