This is a testharness.js-based test.
[FAIL] value at progress 0.75 in animation of "width" from "calc-size(40%, size)" to "calc-size(calc-size(10px, (size * 2)), size + 20px)"
assert_equals: expected "calc-size(100%, 30px + size * 0.4 * 0.25)" but got "calc-size(100%, 0% + 30px + size * 0.4 * 0.25)"
Harness: the test ran to completion.