This is a testharness.js-based test.
Found 1 FAIL, 0 TIMEOUT, 0 NOTRUN.
[FAIL] e.style['animation-range'] = "entry calc(10% - 10%) entry calc(50% + 50%)" should set the property value
  assert_equals: serialization should be canonical expected "entry calc(0%) entry calc(100%)" but got "entry"
Harness: the test ran to completion.