I have now been able to reproduce this problem.
When it occurs, there is blank IE window. It saws 'http://www.google.com/'
in the address bar, but the page is blank, and it is not loading. A refresh
corrects the problem. This is different from what i thought might be
happening (adding waits and sleeps won't correct this).
I'm guessing that this is a multithreading bug in IE itself, that shows up
more often on machines with limited resources (like yours).
I don't really see a way to change Watir itself to avoid this problem. To
some degree it doesn't look like an automation bug. In other words -- if
you manually ran several browsers this fast, i suspect you'd see the same
problem.
I could advise you how to workaround the problem in specific cases. In this
situation ie.text == '', so you add a check to detect this situation and
retry in your script (or trap the error and ignore it).
Bret
At 09:25 AM 8/5/2005, Warren Pollans wrote:
I put the script in a loop to run 20 times - typically, there'll be 2
errors out of twenty. Could someone else try this:
for %i in (1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20) do ruby
concurrent_search.rb
I put in a "sleep 1" between the ie.start and the ie.test_field and
still got failures.
A few other things that didn't work (I'm just fishing):
- putting ie.wait after the the ie.start
- replace ie.start with ie = IE.new; ie.goto
Changing the number of threads to 1 did work -->> no errors
Changing the number of threads to 2 did NOT work
I'm using the current stable version of ruby (1.8.2-14, I believe) and
the watir 1.4. I'm running win2k (service pack 4) on an old 730
MHz Gateway with 256 Mb memory
On Thu, 04 Aug 2005 17:08:36 -0500
Bret Pettichord <[EMAIL PROTECTED]> wrote:
> My guess is that this is a timing issue of some sort and ultimately a
> bug (race condition) in watir.
>
> One thing you can do is put small sleep statements in there.
>
> For example put a "sleep 0.1" right before the failing line and then
> see if you can reproduce the problem. If not, that proves it is a
> race condition. (We still would need to figure out exactly where the
> problem is, however.)
>
> Bret
>
> At 01:42 PM 8/4/2005, Warren Pollans wrote:
> >OK, I was wrong, the behavior is intermittent. Sometimes it works and
> >sometimes it doesn't :-( Any suggestions about how to track this
> >down?
> >
> >On Thu, 4 Aug 2005 14:35:36 -0400
> >Warren Pollans <[EMAIL PROTECTED]> wrote:
> >
> > > Hmmm, I get the error if there's no browser window open at the
> > > start. If a browser window is already open, it runs without
> > > error. Is this the expected behavior?
> > >
> > >
> > >
> > > On Thu, 04 Aug 2005 12:03:00 -0600
> > > Paul Rogers <[EMAIL PROTECTED]> wrote:
> > >
> > > > Well, it works for me ;-)
> > > >
> > > > The error is that watir couldn't find the text field where you
> > > > enter the search term.
> > > > I live in canada, and I always get redirected to google.ca, so
> > > > maybe something similar is happening for you and the search box
> > > > has a different name...
> > > > Other than that I cant really help...
> > > >
> > > > -----Original Message-----
> > > > From: [EMAIL PROTECTED]
> > > > [mailto:[EMAIL PROTECTED] On Behalf Of Warren
> > > > Pollans Sent: 04 August 2005 11:39
> > > > To: [email protected]
> > > > Subject: [Wtr-general] example/concurrent_search error
> > > >
> > > >
> > > > Hello,
> > > >
> > > > Sorry, if this is obvious - I'm new to ruby, watir, and windows
> > > > - I'm coming from perl on unix.
> > > >
> > > > What have I missed here? I ran the example concurrent_search
> > > > test and got the following:
> > > >
> > > >
> > > > C:\watir_bonus\examples>ruby concurrent_search.rb
> > > > c:/ruby/lib/ruby/site_ruby/1.8/watir.rb:1939:in `assert_exists':
> > > > Unable to locate object, using name and q
> > > > (Watir::Exception::UnknownObjectException) from
> > > > concurrent_search.rb:18:in `join' from concurrent_search.rb:18
> > > > from concurrent_search.rb:18:in `each'
> > > > from concurrent_search.rb:18
> > > >
> > > >
> > > > C:\watir_bonus\examples>more concurrent_search.rb
> > > > # demonstrate ability to run multiple tests concurrently
> > > >
> > > > require 'thread'
> > > > require 'watir'
> > > >
> > > > def test_google
> > > > ie = Watir::IE.start('http://www.google.com')
> > > > ie.text_field(:name, "q").set("pickaxe")
> > > > ie.button(:value, "Google Search").click
> > > > ie.close
> > > > end
> > > >
> > > > # run the same test three times concurrently in separate
> > > > browsers threads = [] 3.times do
> > > > threads << Thread.new {test_google}
> > > > end
> > > > threads.each {|x| x.join}
> > > > _______________________________________________
> > > > Wtr-general mailing list
> > > > [email protected]
> > > > http://rubyforge.org/mailman/listinfo/wtr-general
> > > >
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>
> _____________________
> Bret Pettichord
> www.pettichord.com
>
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