This is a testharness.js-based test.
[FAIL] height="-10" should be an invalid attribute value (ignored)
  assert_equals: SVGAnimatedLength.baseVal.value should keep the initial value expected 0 but got -10
[FAIL] height="-10px" should be an invalid attribute value (ignored)
  assert_equals: SVGAnimatedLength.baseVal.value should keep the initial value expected 0 but got -10
[FAIL] height="-10%" should be an invalid attribute value (ignored)
  assert_equals: SVGAnimatedLength.baseVal.value should keep the initial value expected 0 but got -80
Harness: the test ran to completion.