This is a testharness.js-based test.
[FAIL] e.style['line-clamp'] = "\\" etc., etc. \\"" should set the property value
  assert_not_equals: property should be set got disallowed value ""
[FAIL] e.style['line-clamp'] = "9 \\" etc., etc. \\"" should set the property value
  assert_not_equals: property should be set got disallowed value ""
[FAIL] e.style['line-clamp'] = "\\" etc., etc. \\" 12" should set the property value
  assert_not_equals: property should be set got disallowed value ""
[FAIL] e.style['line-clamp'] = "no-ellipsis -webkit-legacy" should set the property value
  assert_equals: serialization should be canonical expected "auto no-ellipsis -webkit-legacy" but got "no-ellipsis -webkit-legacy"
Harness: the test ran to completion.