testrunner for test-driven development
Waiting for stuff sucks.
roadrunner is a looping test runner with environment preloading for test-driven development.
It preloads a standard Zope & Plone test environment compatible with PloneTestCase.
Other than that it pretty much works like the regular Zope testrunner.
How faster is it?
Here’s an example. You are writing integration or functional tests for a Plone application.
On this fairly current laptop it takes 25s to load Zope, Plone and setup a sample Plone site.
Add 5 seconds for the application load and test run for a total of 30 seconds.
If you are iterating on a functional test and want to quickly check your changes that is too long to wait.
Using roadrunner you load the environment the first time. Subsequent times you run your test your total time will be only 5 seconds.
Yes, you can save 25 seconds every time you run your test.
How to use it?
Roadrunner only currently works as part of a zc.buildout environment.
The easiest way to try it is to add it to an existing Plone 3 buildout.
Here’s a sample part:
[roadrunner] recipe = roadrunner:plone packages-under-test = my.package
You can also match several packages using simple globbing, eg: my.packages.*
This will create a new directory in parts named by the part containing a copy of your Zope instance environment but with the packages-under-test excluded from being loaded via ZCML by default.
Then you can run roadrunner:
$ bin/roadrunner -s my.package
It will preload Zope & Plone, then fork off the first testrunner. Once the first testrunner is complete you will receive the roadrunner prompt where you launch additional tests.
roadrunner is still a bit experimental. I haven’t yet seen a situation where it did not work as planned, but it may expose if your test setup does things out of order.
You’ll be fine as long as you follow the standard sequence of importing your product, loading its ZCML and then calling ztc.installProduct within an @onsetup deferred method.
For more details see an example here:
Because it preloads the Plone environment you won’t be able to see changes to the Core Plone components. However, it should see all changes in your application code which is what you will most likely be changing anyways.
Theoretically this should be able to work with any test environment (eg. Django, TG, Twisted).
I eventually plan to do this, and would accept any patches in the meantime if anyone feels so inclined.
Other options to speed up Plone testing
plone.reload / ReloadNG:
- These two rely on Guido’s xreload module.
- It needs a lot of hacks to make it work because of complicated bits in Zope2. roadrunner by comparison just gives up trying to hack Zope2 and relies on a process checkpoint method. I’m still trying to figure out if plone.reload could help roadrunner and vice versa.
Plone 3.1. Let me know if you get it working on anything else.
Licensed under ZPL 2.1 see doc/LICENSE.txt
Copyright 2008, Scryent Changelog ———
0.2.2 (Jun 1, 2008)
- zope2/lib/python was being placed at the very start of the path which didn’t allow newer eggs to be seen. Now placed at the end of sys.path.
- hack to reset terminal after you kill PDB. May need work for Windows.
0.2.1 (May 26, 2008)
- fixed bug in the buildout recipe that excluded Zope from the sys.path. Bug crept in because of “dirty” python install. virtualenv –no-site-packages is your friend.
- removed an annoying child process message.
0.2 (May 25, 2008)
- added a zc.buildout recipe to setup roadrunner with Plone
- fixed globbing for packages under test
- fixed child signal handling so you can reliably interrupt running tests without killing the parent
0.1 (May 18, 2008)
Initial public version
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