I have a JavaScript widget library that I am wrapping as GWT widgets.
Some of the widget's JavaScript functions can only be called after the
widget is attached, so if they are called during the application
onModuleLoad, we are issuing a deferred command so that the method
will be called again after the widget is attached.  This works well
when running the application.

However, I want to have some JUnit tests that can test the result of
the deferred command and I have not been able to come up with a way to
do that.  I have tried adding the widget to the RootPanel, but the
widget's onLoad method is not called.

For example, I tried the following in a GWT JUnit test:
CustomWidget testWidget = new CustomWidget();
testWidget.jsMethodWrapper(); //This causes a deferred command to be
created.
RootPanel.get().add(testWidget);
assertTrue(...); //This tests the result of the deferred command

Is there a way to force deferred commands to run so that their results
can be tested within a JUnit test?

Thanks.
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