This is a testharness.js-based test.
[FAIL] flexbox > item 1
assert_equals: \n<item data-offset-x="8" data-expected-margin-left="0"></item>\noffsetLeft expected 8 but got 18
[FAIL] flexbox > item 2
assert_equals: \n<item data-offset-x="8" data-expected-margin-left="0"></item>\noffsetLeft expected 8 but got 18
[FAIL] flexbox > item 3
assert_equals: \n<item data-offset-x="68" data-expected-margin-left="10"></item>\noffsetLeft expected 68 but got 78
[FAIL] flexbox > item 4
assert_equals: \n<item data-offset-x="68" data-expected-margin-left="10"></item>\noffsetLeft expected 68 but got 78
Harness: the test ran to completion.