This is a testharness.js-based test.
[FAIL] Unknown pseudo-element with a known identifier: file-selector-button
  assert_equals: Should return the ::file-selector-button style expected "rgb(0, 128, 0)" but got "rgb(255, 0, 0)"
[FAIL] Unknown pseudo-element with a known identifier: placeholder
  assert_equals: Should return the ::placeholder style expected "rgb(0, 128, 0)" but got "rgb(255, 0, 0)"
[FAIL] Prefixed ::-webkit-file-upload-button does not resolve in getComputedStyle
  assert_true: ::-webkit-file-upload-button should return empty style expected true got false
Harness: the test ran to completion.