The test checks, what happens, if there is no section instruction in opt:show.
Situation B: no section, no data, no effect.

>>>>templates/test.tpl
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<opt:root>
<opt:show name="sect">
Foo:
Eof
</opt:show>
</opt:root>

>>>>expected.txt
OUTPUT

>>>>result.txt

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