[image-set-parsing.html]
  [e.style['content'\] = "image-set(linear-gradient(black, white) 1x, 'example.png' 4x)" should set the property value]
    expected: FAIL

  [e.style['content'\] = "-webkit-image-set(linear-gradient(black, white) 1x, 'example.png' 4x)" should set the property value]
    expected: FAIL

  [e.style['content'\] = "image-set(url(\\"example.png\\") 192dpi, linear-gradient(black, white) 1x)" should set the property value]
    expected: FAIL

  [e.style['content'\] = "-webkit-image-set(url(\\"example.png\\") 192dpi, linear-gradient(black, white) 1x)" should set the property value]
    expected: FAIL
