After Lunch Comes a Bit Late


After Lunch Comes a Bit Late

In our last episode, we implemented a simple ability to add a section tag to the XML Notepad. It turns out I wasnt able to work on it after lunch, and in fact its now almost a week since I made that test run. The test points right to the code, and the code is simple, so Ive had no trouble catching up. Chet will be joining me in just a few minutes, and Ill bring him up to speed. Ill record here what we talk about: it will give you a sense of what it takes to bring a new pair up to date.

Meanwhile, Im going to clean up the code a little before getting down to things. Ive learned from experience that it doesnt pay to let it go too long before cleaning things up. Here comes Chet now; Ill bring him up to speed as we go.

In reviewing the code, we discovered that I had copied a bit of extra stuff into the InsertSectionTags(). We also discovered that the Ctrl+S wasnt yet implemented in the GUI. It didnt interfere with the test, but it should have. So Chet said: What we have learned is that when Im not here, you leave things out, your code isnt as good, and your tests didnt find the problem. All true: I need a pair. Anyone in the Ann Arbor area want to volunteer?

We noticed that, at least offhand, we dont know how to test whether the GUI implements a particular control character. Im arguing to defer that issue and go to the core issue of getting things done. A couple of ways exist to check that the key is correctly implemented in the GUI. We both thought independently of the cool way: use reflection to check the class, and see to it that it implements what it needs to. Thats way too deep in the bag of tricks to be a good idea, but it could be an interesting learning experiment at some time. The simplest thing to do is just to build a notepad object in the Customer Acceptance Tests (which now test against the TextModel) and to send KeyPress events to it. Thats probably a good way to do it, but Chet and I both have fear of creating GUI classes during tests. Thats probably not a good fear, but its holding us back right now.

Were going to defer solving this problem. But we know it is a real problem: theres nothing that stops us from writing a good customer test, making it work with lots of good programmer tests, and then having the GUI not show up with the feature. We made a mental note to notice when it happens again, in case we dont get to this test early on. Right now, though, were going forward with finishing the feature.




Extreme Programming Adventures in C#
Javaв„ў EE 5 Tutorial, The (3rd Edition)
ISBN: 735619492
EAN: 2147483647
Year: 2006
Pages: 291

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