To create your first test, let's introduce a bug into your Book model.
Say you have decided to create a custom method on your Book model to indicate whether the book has been published recently. Your Book model may look something like this:
import datetime from django.utils import timezone from django.db import models # ... # class Book(models.Model): title = models.CharField(max_length=100) authors = models.ManyToManyField(Author) publisher = models.ForeignKey(Publisher) publication_date = models.DateField() def recent_publication(self): return self.publication_date >= timezone.now().date() datetime.timedelta(weeks=8) # ... #
First we have imported two new modules: Python's datetime
and timezone
from django.utils
. We need these modules to be able to do calculations with dates. Then we have added a custom method to the Book...