This is a testharness.js-based test.
[FAIL] .collapsed 1
assert_equals: \n<item data-offset-y="58" class="collapsed" style="margin-block: 10px 20px;">\n <item data-offset-y="58" class="collapsed" style="margin-block: -40px 50px;"></item>\n <item data-offset-y="58" class="collapsed" style="margin-block: 35px 5px;">\n <item data-offset-y="58" class="collapsed" style="margin-block: 300px 100px"></item>\n </item>\n </item>\noffsetTop expected 58 but got 318
[FAIL] .collapsed 2
assert_equals: \n<item data-offset-y="58" class="collapsed" style="margin-block: -40px 50px;"></item>\noffsetTop expected 58 but got 318
[FAIL] .collapsed 3
assert_equals: \n<item data-offset-y="58" class="collapsed" style="margin-block: 35px 5px;">\n <item data-offset-y="58" class="collapsed" style="margin-block: 300px 100px"></item>\n </item>\noffsetTop expected 58 but got 318
[FAIL] .collapsed 4
assert_equals: \n<item data-offset-y="58" class="collapsed" style="margin-block: 300px 100px"></item>\noffsetTop expected 58 but got 318
[FAIL] .collapsed 5
assert_equals: \n<item data-offset-y="58" class="collapsed" style="margin-block: 40px 23px;"></item>\noffsetTop expected 58 but got 318
[FAIL] .collapsed 6
assert_equals: \n<item data-offset-y="58" class="collapsed" style="margin-block: 100px 200px">\n <item data-offset-y="58" class="collapsed" style="margin-block: -100px -200px;"></item>\n </item>\noffsetTop expected 58 but got 158
[FAIL] .collapsed 7
assert_equals: \n<item data-offset-y="58" class="collapsed" style="margin-block: -100px -200px;"></item>\noffsetTop expected 58 but got 158
Harness: the test ran to completion.