The test checks, what happens, if there is no section instruction in opt:show.
Situation C: no section, no data, but the error message set.

>>>>templates/test.tpl
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<opt:root>
<opt:show name="sect">
Foo:
Eof
<opt:showelse>NO DATA</opt:showelse>
</opt:show>
</opt:root>

>>>>expected.txt
OUTPUT

>>>>result.txt
NO DATA

>>>>data.php
$view->sect = array();