Book Image

Django 1.1 Testing and Debugging

Book Image

Django 1.1 Testing and Debugging

Overview of this book

Bugs are a time consuming burden during software development. Django's built-in test framework and debugging support help lessen this burden. This book will teach you quick and efficient techniques for using Django and Python tools to eradicate bugs and ensure your Django application works correctly. This book will walk you step by step through development of a complete sample Django application. You will learn how best to test and debug models, views, URL configuration, templates, and template tags. This book will help you integrate with and make use of the rich external environment of test and debugging tools for Python and Django applications. The book starts with a basic overview of testing. It will highlight areas to look out for while testing. You will learn about different kinds of tests available, and the pros and cons of each, and also details of test extensions provided by Django that simplify the task of testing Django applications. You will see an illustration of how external tools that provide even more sophisticated testing features can be integrated into Django's framework. On the debugging front, the book illustrates how to interpret the extensive debugging information provided by Django's debug error pages, and how to utilize logging and other external tools to learn what code is doing.
Table of Contents (17 chapters)
Django 1.1 Testing and Debugging
Credits
About the Author
About the Reviewer
Preface
Index

Getting started: Creating a new application


Let's get started by creating a new Django project and application. Just so we have something consistent to work with throughout this book, let's assume we are setting out to create a new market-research type website. At this point, we don't need to decide much about this site except some names for the Django project and at least one application that it will include. As market_research is a bit long, let's shorten that to marketr for the project name. We can use django-admin.py to create a new Django project:

kmt@lbox:/dj_projects$ django-admin.py startproject marketr

Then, from within the new marketr directory, we can create a new Django application using the manage.py utility. One of the core applications for our market research project will be a survey application, so we will start by creating it:

kmt@lbox:/dj_projects/marketr$ python manage.py startapp survey

Now we have the basic skeleton of a Django project and application: a settings.py file, a urls.py file, the manage.py utility, and a survey directory containing .py files for models, views, and tests. There is nothing of substance placed in the auto-generated models and views files, but in the tests.py file there are two sample tests: one unit test and one doctest. We will examine each in detail next.