Test 'shape' attributes using various combinations of values. If working as expected, behavior of all 4 image maps should function identically. This should be converted to a unit test once the testing framework is updated.
The behavior of each shape should be:
All 'shape' attributes use conforming value (rect/poly/circle)
All 'shape' attributes use non-conforming value (rectangle/polygon/circ)
All 'shape' attributes use conforming value (poly/circle) with rectangle shape attribute missing which should default to rect per HTML spec
All 'shape' attributes use non-conforming value (polygon/circ) with rectangle shape attribute empty which should default to rect per HTML spec