Django Fail provides tools for testing your site under less-than-ideal conditions.
When working locally, response times are near instant, and there is no entropy introduced by network hardware (e.g. proxies or load balancers) that may, for some reason or other, fail.
Django Fail helps you test what happens when some parts of your site don't load or load slowly. This can be particularly helpful for responses used in Ajax-powered applications.
Look at fail.decorators.fail and fail.decorators.slow.
The @fail() decorator makes a view return some kind of failure response, instead of a real response.
For the arguments, status is the status code, normally 500, content is any content to return, normally '', and mimetype is the mimetype of the response, normally text/html.
The @fail() decorator can be globally disabled by adding FAIL_ON = False to settings.py.
The @slow() decorator makes a response wait a while before returning. The delay is in seconds and defaults to 2.
The @slow() decorator can be globally disabled by adding SLOW_ON = False to settings.py.