This tests that the getTrait[NS] and setTrait[NS]
methods of the TraitAccess interface work for the special
'#text' trait on the desc, title,
metadata, text, tspan and textArea
elements.
The rectangle in the top left corner indicates whether the
getTrait and getTraitNS returned the expected
strings for each of the relevant elements; blue for pass,
red for fail. The four text strings below it indicate whether
setTrait and setTraitNS worked on the text
and textArea elements; they must all be the string “PASS”.
