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buttons not found -- what can be done? [message #487140]

Tue, 22 September 2009 02:55

Eclipse User

I sometimes get "WidgetNotFoundException: Could not find widget" when I try to click on a button. This has happened even with simple next, finish and cancel buttons. Has anyone else experienced this? What can be done about it? This is a real problem for us because it means the testcases are not deterministic but having a random element of chance to them ...

I'm on SWT-Bot version 329 -- would upgrading help with this?

Thanks a lot!
-- Steven

Re: buttons not found -- what can be done? [message #487204 is a reply to message #487140]

Tue, 22 September 2009 08:56

Eclipse User

Steven Chamberlin wrote:
> I sometimes get "WidgetNotFoundException: Could not find widget" when I
> try to click on a button. This has happened even with simple next,
> finish and cancel buttons. Has anyone else experienced this? What can
> be done about it? This is a real problem for us because it means the
> testcases are not deterministic but having a random element of chance to
> them ...
>
> I'm on SWT-Bot version 329 -- would upgrading help with this?
>
> Thanks a lot!
> -- Steven

WidgetNotFoundException is the general exception when a bot can't find a
widget. Usually there is a relevant message you are trying to find
something specific. For example, when using bot.button("foo"), you'll
get something close to "WidgetNotFoundException: Could not find widget
button with text "foo"".

Often, this can happen when the WorkbenchTestable thread (the thread on
which SWTBot runs) execute the search before the widget you are
searching for is shown. One good example of this is opening shells:
when opening a wizard, you should synchronize the WorkbenchTestable
thread with the UI thread using this
Matcher<Shell> matcher = withText("New Project");
getBot().waitUntil(waitForShell(matcher));

This is only an example. The SWTBot#waitUntil(ICondition) method can be
used with your own conditions for any synchronization you need.

If this does not help you at all, please post a snippet of something
that fails and I'll try to help you further.
--
Pascal Gélinas | Software Developer
*Nu Echo Inc.*
http://www.nuecho.com/ | http://blog.nuecho.com/

*Because performance matters.*

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