This is a testharness.js-based test.
[FAIL] .target 1
assert_equals: \n<div class="target" data-expected-height="50"></div>\nheight expected 50 but got 0
[FAIL] .target 4
assert_equals: \n<div class="target" data-expected-height="50"></div>\nheight expected 50 but got 0
Harness: the test ran to completion.