I have a little application that's sort of like a load testing system. It
goes to a web site that contains a form, fills in some values, pushes a
button, and then verifies that the next screen contains some text. It does
this continuously in a loop, and I have 3 of these running in threads in
parallel.
I find that about half of the attempts to do this end in failure with a
problem related to JavaScript. The site I'm loading loads a Javascript file
which in turn sucks in several other JavaScript files. My gut feeling is
that one of these files doesn't download properly which screws everything
else up. I'm having a hard time diagnosing the problem, and was hoping for
some answers:
1. I can easily call webTester.getPageSource() to see the source of the page
that was loaded, but that doesn't tell me anything about what gets loaded
subsequently. Is there some way to determine if a 2nd level load (such as a
JavaScript file) fails? I'm assuming that these things get loaded by
HtmlUnit - how do I get access to this info?
2. I was thinking that perhaps the problem was that the loading of files was
timing out, so I decided to call webTester.setTimeout(10000) to provide
plenty of time. Will this affect the timeout of the subsequent HtmlUnit
calls for JavaScript file that get loaded by the main file loaded? Calling
setTimeout didn't seem to fix anything for me.
3. I also noted that all of the JavaScript that's being used requires a
bunch of memory and threads. It even looks like there are threads that get
left over after all of the processing is done and I've killed my webTesters.
I look at the active threads, and find many that are called "JavaScript Job
Thread". I assume that HtmlUnit is creating these, but I don't know why they
continue to exist after I've kill the things that initially created them.
Anyone have any ideas?
4. Because I believe there are problems with HtmlUnit, I decided to move my
version from 2.5 to 2.6 (I'm using JWebUnit 2.2). When I try to push a
button I get a stacktrace:
java.lang.NoSuchMethodError:
com.gargoylesoftware.htmlunit.html.HtmlElement.getAttributeValue(Ljava/lang/String;)Ljava/lang/String;
at
net.sourceforge.jwebunit.htmlunit.HtmlUnitTestingEngineImpl.getButtonWithText(HtmlUnitTestingEngineImpl.java:1384)
at
net.sourceforge.jwebunit.htmlunit.HtmlUnitTestingEngineImpl.hasButtonWithText(HtmlUnitTestingEngineImpl.java:1357)
at
net.sourceforge.jwebunit.junit.WebTester.assertButtonPresentWithText(WebTester.java:1826)
at
net.sourceforge.jwebunit.junit.WebTester.clickButtonWithText(WebTester.java:2531)
I realize that this really isn't the fault of JWebUnit, but just thought
you'd like to know.
Any help with ideas on how I could so;ve these problems would be
appreciated.
--
Sander A. Smith
President
Sericon Technology Inc.
71 Marquette Ave.
Toronto, Ontario M6A 1X8
(416)781-3988
Link to me on LinkedIn
http://www.linkedin.com/in/sandersmith
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