This is a testharness.js-based test.
[FAIL] .aqua 1
  assert_equals: \n<span class="aqua" style="text-box: ex alphabetic;" data-offset-y="55" data-expected-height="25">█BxIF</span>\nheight expected 25 but got 100
[FAIL] .aqua 2
  assert_equals: \n<span class="aqua" style="text-box: trim-start cap alphabetic;" data-offset-y="25" data-expected-height="75">█BxIF</span>\nheight expected 75 but got 100
[FAIL] .aqua 3
  assert_equals: \n<span class="aqua" style="text-box: trim-end text alphabetic;" data-offset-y="0" data-expected-height="80">█BxIF</span>\nheight expected 80 but got 100
Harness: the test ran to completion.