This tests the behavior of root SVG length value resolution

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


 PASS successfullyParsed is true

TEST COMPLETE
Initial/default values:
PASS svg.width.baseVal.value is 200
PASS svg.height.baseVal.value is 200

Updated relative values:
PASS svg.width.baseVal.value is 100
PASS svg.height.baseVal.value is 20

Updated fixed values:
PASS svg.width.baseVal.value is 150
PASS svg.height.baseVal.value is 50

viewBox has no effect on top level length resolution.
PASS svg.width.baseVal.value is 200
PASS svg.height.baseVal.value is 100