When JTreg starts applet test it calls Applet.init() then
Applet.start(). It doesn't call Applet.validate(). This call is very
desirable for the automatic tests - these kind of tests should contain
all the logic (including GUI) inside of start() method and so after
the exit from start() applet is considered finished its work. If
validate() wasn't called before start() then sometimes the GUI is not
visible.

Note that JTreg behaves differently than AppletViewer does which calls
validate() after init() and after start() and while applet tests are
not guaranteed to run similiarly on both AppletViewer and JTreg it is
desirable behavior.

Generally speaking JTreg's AppletWrapper doesn't to conform to
AppletViewer's logic in some aspects and it would be useful if it will
be made to conform to AppletViewer as much as possible.