October 2009
Beginner
350 pages
11h 10m
English
Content preview from Beautiful TestingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Ensuring Correctness
The obvious—though not only—purpose of testing is to find bugs. First, each developer runs most of the tests before submitting. Why only “most”? The entire test suite, including all the options, takes over an hour to run.[24] Most developers won’t wait that long before checking in. The tests we ask developers to run[25] take at most seven minutes, a length of time most developers are willing to wait. We prefer to get them to run a slightly less complete set of tests rather than ask them to run the whole thing and have them ignore that request.
But, since the whole test suite does provide value on top of the smoke tests, we need some way to run them.
The Buildbot System
The Buildbot system[26] tests every check-in on many platforms. It runs on all of the active branches (currently 2.6, trunk [2.7], 3.1, and py3k [3.2])[27] on roughly 15–20 different architectures, and we’re about to add even more systems.[28] The machines are donated, and we’re always looking for more diversity. When any buildbot sees a build or test failure, it sends email to the python-checkins mailing list.[29] In theory, after submitting a change, a developer pays extra attention to her email to see if she has caused any problems.
Since most developers are on an x86, running Linux or Mac OS X, and compiling with gcc,[30] this serves to make sure that Windows and other minority platforms stay stable. We have a subset of “stable” platforms, and we don’t release new versions of Python until those ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.