Test::TAP::Model::Subtest::Visual - A subtest with additional display oriented methods.

	See template

This object knows is used by the template to display per case cells, with a class, and a link, and a tooltip.

css_class

The correct css class for a case as defined in testgraph.css.

popup

A concatenation of the test line and it's diagnosis, used for tooltips.

link

Extracted from the pos:

	$file#line_$line