This is a testharness.js-based test.
[FAIL] e.style['letter-spacing'] = "120%" should set the property value
assert_not_equals: property should be set got disallowed value ""
[FAIL] e.style['letter-spacing'] = "-10%" should set the property value
assert_not_equals: property should be set got disallowed value ""
[FAIL] e.style['letter-spacing'] = "calc(2ch - 30%)" should set the property value
assert_not_equals: property should be set got disallowed value ""
[FAIL] e.style['letter-spacing'] = "calc(40% + 50px)" should set the property value
assert_not_equals: property should be set got disallowed value ""
Harness: the test ran to completion.