Hi Gerard, I am very interested in the tool you mention. Let's keep the discussion on list, since I suspect there are others who might want to set up a regression test environment either now or later. Can you provide some pointers how to use this tool? Is it described in the standard SVN documentation or is that located somewhere else? What is its name? Would its use allow testing against the most recent version in trunk? My initial thoughts for such a regression test installation are: I think some extensions involve database schema changes. My initial idea is to create a new installation, make all of the schema changes necessary for any extensions in the regression test set and then dump the database. This dump could then be used to set up new regression test installations (or reinitialize existing test installations). Perhaps the dump could be placed in Subversion in a "test" area. Just loading a set of extensions in an installation doesn't really provide much in the way of verifying they work together. The test needs to use them together. One way to do this would be to create a set of pages that concurrently access the extensions when the pages are rendered. Knowing which extensions to use together is a key to this approach. Perhaps there is information in Bugzilla that would help determine that. Also, extension authors might provide some tests that could be incorporated into the test set. If you or others have some ideas on how to test extensions that would be very helpful. When I worked on Solaris at Sun in the mid-90s, developers were required to regression test their changes before submitting them (through a gatekeeper) for inclusion in the nightly build. Those who failed to do so and broke the build had their hands slapped. Perhaps something similar might be established for the mediawiki development process. Extension authors might be required to: 1) provide some extension tests that could included in the regression test set (if their extensions ever become important enough to do that), and 2) run their extension tests and the standard tests against a standard regression test installation and provide evidence that there are no problems before their extensions are included in the mediawiki extensions matrix. Dan --- On Wed, 7/8/09, Gerard Meijssen <gerard.meijssen(a)gmail.com> wrote: