WebTest Groovy example thows NoSuchMethodError

I've been working on a project to do functional testing on a web application using WebTest. I've coded up some prototypes using the standard XML/Ant format/language/DSL, but I wanted to try doing it in Groovy, since I'm not a big fan of XML. I copied the sample application from the manual, but when I ran it I was getting and exception:

Caught: : java.lang.NoSuchMethodError: org.apache.xpath.compiler.FunctionTable.installFunction(Ljava/lang/String;Ljava/lang/Class;)I
at test.run(test.groovy:33)
at test.main(test.groovy)

(If you're following along at home, you'll note that that line number is too large for the example - I've already hacked some stuff into it.)

I couldn't find any examples online of people having exactly the same problem, but I'd seen other errors blaming an old version of xalan.jar for this problem, especially under Mac OS 10.5 - my platform. (BTW, this happened under both Java5 and Java6.) Although I didn't have CLASSPATH set to anything, I figured I'd try setting it to have the version of xalan.jar that ships with WebTest, and it worked. So, my complete invocation line is:

groovy -cp /usr/local/java/webtest_1720/lib/xalan-2.7.0.jar -Dwebtest.home=/usr/local/java/webtest_1720 test.groovy

enjoy,
Charles.

Data Driven, my eye!

I've started using the WebTest web testing framework. Mostly, it's pretty cool. However, I have a bone to pick with screencast demonstrating the dataDriven task.

1. There's a "slide" that says "Do you know the dataDriven Ant task?" I know of no such standard Ant task. It turns out that it's specific to WebTest. Not really clear.
   
2. They show no configuration steps to use it, implying that it works out-of-the-box. I don't know if my environment is wacked (I installed from the developer build, as they suggested), but I had to add an Ant taskdef referring to com.canoo.ant.task.PropertyTableTask, and I only found that by looking in the source.
3. The screencast shows running ant at the command line, which is how I've been running my tests, but I had to run their webtest script instead. Again, maybe my installation is wacked.
4. I really wish it could handle data in a TSV/CSV/text file, since I don't have Excel installed on the machine where I'm running these tests, but it only seems to accept an xls file.
5. Just to add insult to injury, Google Spreadsheet (which I'm using to generate the data file) seems to append a bunch of empty lines to my spreadsheet, which causes the dataDriven task to repeat the last line 90-odd times.
   

Grrr,
Charles - aka Cranky Pants.

Update:
OK, so it sucked to be me, but not any more. I figured out my various issues with the dataDriven task. It turns out that the screencast (clearly) shows them developing in the tests directory of a WebTest project. I missed that and tried to use dataDriven in the top-level build.xml in a target that didn't declare wt.defineTasks as a dependency. Guess what wt.defineTask does - yup, it does the taskdef.
I coupled that breakthrough with breaking down and using Excel to create the xls file (instead of exporting from Google) and viola - I'm livin' large and no longer cranky.

enjoy,
Charles.

P.S. Apologies to Cheech and Chong.