A variant on django.test.TestCase optimized for postgres
Project description
This is an alternate TestCase class to improve test running times (I measured a 2x improvement on some of my projects).
You can just use it and get a speed improvement for free, as long as your projects satisfy the follwoing conditions:
You use Django 1.3 (It might work with newer versions but I haven’t tried)
Your tests use postgreSQL as a database backend, 8.0 or newer
Your tests usa a single-database setup
Your tests don’t make operations on the db connection that make some state change that is not reverted by a savepoint rollback.
If the last point is false for a few of your tests, you can use the regular django.test.TestCase for that case, and gain the speed improvement in most of them.
How to use
Change your:
from django.test import TestCase
to:
from django_fasttest import TestCase
How does it work
What makes it faster is that fixture parsing/loading is done once per TestCase instead of once per test. Between tests in a same TestCase, the database is rolled back (using a pgsql savepoint) to the point just after loading the fixtures.
All the tests within a testcase use the same database connection (the standard TestCase class shuts down the connection between tests), and are run within the same transaction. If you use transactions in your code, you’ll have the same limitations as you do currently in Django 1.3
The speed benefits will be more noticeable if you have many test cases that use large fixtures, and if those tests are grouped in a TestCase.
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