httpunit-develop

AW: [Httpunit-develop] Running tests in different threads causes errors in test script

[EdA-qa Mort-ora-y <mor...@ec...>]

Have you checked your webserver logs?  Perhaps your simple test just =
happens to overload your server and you get an incorrect response.

Try dumping the value of the WebResponse after each response and verify =
that it is what you expect in all cases.


> -----Urspr=FCngliche Nachricht-----
> Von: htt...@li...
> [mailto:htt...@li...]Im Auftrag von
> Jason
> Gesendet: Donnerstag, 27. Oktober 2005 23:35
> An: htt...@li...
> Betreff: [Httpunit-develop] Running tests in different threads causes
> errors in test script
>=20
>=20
> I am having problems when running a test script that uses=20
> multiple threads in the same JVM.  When
> I run the example that follows, I get NullPointerException,=20
> IllegalUnnamedSubmitButtonException,
> NoSuchParameterException.  It appears that the threads are=20
> affecting the state of other threads in
> some way.
>=20
> I can, however, run the script with only one thread, and it=20
> never fails.
>=20
> In addition, I can run the script many times in different JVM=20
> instances on the same machine
> (running it multiple times in Eclipse, to be exact), without=20
> any problems.
>=20
> Here is a sanitized example of the type of script I am running.
>=20
>   import java.io.IOException;
>   import org.xml.sax.SAXException;
>   import com.meterware.httpunit.*;
>  =20
>   public class Demo implements Runnable {
>       private static String URL =3D=20
> "http://somehost.com:8080/app/startpage.jsp";
>       private WebForm form;
>       private WebLink link;
>       private WebRequest request;
>       private WebResponse response;
>       private WebConversation wc;
>  =20
>       public static void main(String[] params) {
>           new Thread(new Demo()).start();
>           new Thread(new Demo()).start();  // works if i=20
> comment this line out
>           new Thread(new Demo()).start();  // works if i=20
> comment this line out
>           new Thread(new Demo()).start();  // works if i=20
> comment this line out
>       }
>  =20
>       public void doScript() throws SAXException, IOException {
>           request =3D new GetMethodWebRequest(URL);
>           response =3D wc.getResponse(request);
>           link =3D response.getLinkWith("New Task");
>           response =3D link.click();
>           form =3D response.getFormWithName("firstform");
>           form.setParameter("thing1", "value1");
>           form.setParameter("thing2", "value2");
>           form.setParameter("thing3", "value3");
>           response =3D form.submit(form.getSubmitButton("nextPage"));
>           form =3D response.getFromWithName("nextForm");
>           form.setParameter("thing1", "value1");
>           form.setParameter("thing2", "value2");
>           form.setParameter("thing3", "value3");
>           form =3D response.getFormWithName("anotherform");
>           form.setParameter("thing1", "value1");
>           response =3D form.submit(form.getSubmitButton("Finish"));
>           // ETC ETC ETC
>       }
>  =20
>       public void run() {
>           try {
>               HttpUnitOptions.setScriptingEnabled(false);
>               wc =3D new WebConversation();
>               wc.setAuthorization("username", "password");
>               System.out.println("Thread started");
>               for (int x =3D 0; x < 50; x++) {
>                   doScript();
>               }
>               System.out.println("Thread ended");
>           } catch (Exception e) {
>               e.printStackTrace(System.out);
>           }
>       }
>   }
>=20
> If i comment the noted lines out, it runs fine.  And if after=20
> I comment the lines out, I run it
> multiple times in separate virtual machines, it works fine. =20
> But if I leave the lines uncommented,
> it has problems running the scripts in multiple threads in=20
> the same VM.
>=20
> If anyone can tell what I am doing wrong, or if there is some=20
> bug or workaround, I would greatly
> appreciate it.  As you can see, the variables are all=20
> non-static so there is no sharing between
> instances, and I have created a WebConversation per Thread.
>=20
> Thanks,
> Jason
>=20
>=20
>=20
> 	=09
> __________________________________=20
> Yahoo! FareChase: Search multiple travel sites in one click.
> http://farechase.yahoo.com
>=20
>=20
> -------------------------------------------------------
> This SF.Net email is sponsored by the JBoss Inc.
> Get Certified Today * Register for a JBoss Training Course
> Free Certification Exam for All Training Attendees Through End of 2005
> Visit http://www.jboss.com/services/certification for more information
> _______________________________________________
> Httpunit-develop mailing list
> Htt...@li...
> https://lists.sourceforge.net/lists/listinfo/httpunit-develop
>=20

Re: AW: [Httpunit-develop] Running tests in different threads causes errors in test script

[Jason <ha...@ya...>]

Well, the webserver logs dont show much more than the activity of the script until it fails.

Even so, like I said, the script works fine if I execute each script with one thread in a
different JVM.  For example, if I open a bunch of command windows and run the java command in each
window.

I will just probably use a different testing framework than httpunit, however, since this is a
serious bug in my opinion.  WebConversations should be independent of eachother and threadsafe, I
should not have to run multiple JVMs (which takes tons of memory, etc, and is hard to track
overall statistics between the instances).

--- EdA-qa Mort-ora-y <mor...@ec...> wrote:

> Have you checked your webserver logs?  Perhaps your simple test just happens to overload your
> server and you get an incorrect response.
> 
> Try dumping the value of the WebResponse after each response and verify that it is what you
> expect in all cases.
> 
> 
> > -----Ursprüngliche Nachricht-----
> > Von: htt...@li...
> > [mailto:htt...@li...]Im Auftrag von
> > Jason
> > Gesendet: Donnerstag, 27. Oktober 2005 23:35
> > An: htt...@li...
> > Betreff: [Httpunit-develop] Running tests in different threads causes
> > errors in test script
> > 
> > 
> > I am having problems when running a test script that uses 
> > multiple threads in the same JVM.  When
> > I run the example that follows, I get NullPointerException, 
> > IllegalUnnamedSubmitButtonException,
> > NoSuchParameterException.  It appears that the threads are 
> > affecting the state of other threads in
> > some way.
> > 
> > I can, however, run the script with only one thread, and it 
> > never fails.
> > 
> > In addition, I can run the script many times in different JVM 
> > instances on the same machine
> > (running it multiple times in Eclipse, to be exact), without 
> > any problems.
> > 
> > Here is a sanitized example of the type of script I am running.
> > 
> >   import java.io.IOException;
> >   import org.xml.sax.SAXException;
> >   import com.meterware.httpunit.*;
> >   
> >   public class Demo implements Runnable {
> >       private static String URL = 
> > "http://somehost.com:8080/app/startpage.jsp";
> >       private WebForm form;
> >       private WebLink link;
> >       private WebRequest request;
> >       private WebResponse response;
> >       private WebConversation wc;
> >   
> >       public static void main(String[] params) {
> >           new Thread(new Demo()).start();
> >           new Thread(new Demo()).start();  // works if i 
> > comment this line out
> >           new Thread(new Demo()).start();  // works if i 
> > comment this line out
> >           new Thread(new Demo()).start();  // works if i 
> > comment this line out
> >       }
> >   
> >       public void doScript() throws SAXException, IOException {
> >           request = new GetMethodWebRequest(URL);
> >           response = wc.getResponse(request);
> >           link = response.getLinkWith("New Task");
> >           response = link.click();
> >           form = response.getFormWithName("firstform");
> >           form.setParameter("thing1", "value1");
> >           form.setParameter("thing2", "value2");
> >           form.setParameter("thing3", "value3");
> >           response = form.submit(form.getSubmitButton("nextPage"));
> >           form = response.getFromWithName("nextForm");
> >           form.setParameter("thing1", "value1");
> >           form.setParameter("thing2", "value2");
> >           form.setParameter("thing3", "value3");
> >           form = response.getFormWithName("anotherform");
> >           form.setParameter("thing1", "value1");
> >           response = form.submit(form.getSubmitButton("Finish"));
> >           // ETC ETC ETC
> >       }
> >   
> >       public void run() {
> >           try {
> >               HttpUnitOptions.setScriptingEnabled(false);
> >               wc = new WebConversation();
> >               wc.setAuthorization("username", "password");
> >               System.out.println("Thread started");
> >               for (int x = 0; x < 50; x++) {
> >                   doScript();
> >               }
> >               System.out.println("Thread ended");
> >           } catch (Exception e) {
> >               e.printStackTrace(System.out);
> >           }
> >       }
> >   }
> > 
> > If i comment the noted lines out, it runs fine.  And if after 
> > I comment the lines out, I run it
> > multiple times in separate virtual machines, it works fine.  
> > But if I leave the lines uncommented,
> > it has problems running the scripts in multiple threads in 
> > the same VM.
> > 
> > If anyone can tell what I am doing wrong, or if there is some 
> > bug or workaround, I would greatly
> > appreciate it.  As you can see, the variables are all 
> > non-static so there is no sharing between
> > instances, and I have created a WebConversation per Thread.
> > 
> > Thanks,
> > Jason
> > 
> > 
> > 
> > 		
> > __________________________________ 
> > Yahoo! FareChase: Search multiple travel sites in one click.
> > http://farechase.yahoo.com
> > 
> > 
> > -------------------------------------------------------
> > This SF.Net email is sponsored by the JBoss Inc.
> > Get Certified Today * Register for a JBoss Training Course
> > Free Certification Exam for All Training Attendees Through End of 2005
> > Visit http://www.jboss.com/services/certification for more information
> > _______________________________________________
> > Httpunit-develop mailing list
> > Htt...@li...
> > https://lists.sourceforge.net/lists/listinfo/httpunit-develop
> > 
> 
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by the JBoss Inc.
> Get Certified Today * Register for a JBoss Training Course
> Free Certification Exam for All Training Attendees Through End of 2005
> Visit http://www.jboss.com/services/certification for more information
> _______________________________________________
> Httpunit-develop mailing list
> Htt...@li...
> https://lists.sourceforge.net/lists/listinfo/httpunit-develop
> 



	
		
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