This is a testharness.js-based test.
[PASS] naturalWidth/Height of SVG in <img>, width/height in pixels
[FAIL] naturalWidth/Height of SVG in <img>, width in pixels; height unspecified
  assert_equals: expected "500x0" but got "500x150"
[FAIL] naturalWidth/Height of SVG in <img>, width in pixels; percentage height
  assert_equals: expected "500x0" but got "500x150"
[PASS] naturalWidth/Height of SVG in <img>, width/height in pixels; viewBox
[FAIL] naturalWidth/Height of SVG in <img>, width/height unspecified; viewBox
  assert_equals: expected "0x0" but got "200x150"
[FAIL] naturalWidth/Height of SVG in <img>, width in pixels; height unspecified; viewBox
  assert_equals: expected "400x0" but got "400x300"
Harness: the test ran to completion.