How can I use Factory Boy for testing in Python?

How can I use Factory Boy for testing in Python?

Factory Boy is a flexible and easy-to-use library for creating test data in Python. You can define factories for your models and use them to generate instances for testing.

Can you show me a simple example of a factory?

Sure! Here's a basic example:

from factory import DjangoModelFactory
from myapp.models import User

class UserFactory(DjangoModelFactory):
    class Meta:
        model = User

    username = factory.Faker('user_name')
    email = factory.Faker('email')

This creates a User factory that generates random usernames and emails.

How do I use this factory in my tests?

You can use the factory in your tests like this:

user = UserFactory.create()
assert user.username is not None

This will create a new user instance with random data for testing.

What if I want to customize the data for a specific test?

You can customize the data by passing parameters to the factory. For example:

user = UserFactory(username='testuser')
assert user.username == 'testuser'

This will create a user with the specified username.