We have a suite of regression tests that we wanted to run automatically after our MSbuild build is complete. I’ve implemented these tests as C# code exported from Selenium IDE and preprocessed by some .NET code that I wrote. The tests are then compiled using MSBuild and executed.  The problem I ran into that wasn’t clearly documented anywhere was how to run a Selenium RC test as part of a build process – which requires the Java based Selenium RC server running on port 4444. Since we run our test as part of a scheduled task, how do we maintain the Java Selenium server running across logins of the scheduled task?

My first instinct was to run the Selenium server as a Windows service and I found a forum post that provided a .NET service to do this. The problem is that when the service runs in the LocalSystem’s account context, IE was problematic for enabling the proxy that Selenium RC uses during the invocation of tests.  Trying to modify the service to run as a legitimate user also didn’t work – since the service was running in a different Windows Station and IE did not run correctly in this mode either. 

It turned out the simple solution was to just invoke the Selenium Server from the build batch file and then terminate the server when I was finished with the test. There is a built in command in the command line interpreter named "taskkill" that does the job for me. Here is the .bat file code that I used – and note that the first line kills any java apps that are running so be careful.  I needed this line to abort a server in progress if the script or tests failed and left a java session hanging. My build machine doesn’t have any other java things going on so this worked for me. I’m using nunit to invoke my C# tests contained in "jalisngtests.dll". I’m also using the "sleep" command from the Windows 2003 Resource Kit.

taskkill /f /im java.exe
sleep 5
start "Selenium Server" java ^
-jar C:\selenium-remote-control-1.0-beta-1\^
selenium-server-1.0-beta-1\selenium-server.jar
copy .\bin\debug\*.dll
sleep 20
nunit-console jalisngtests.dll
taskkill /f /fi "WINDOWTITLE eq Selenium Server"