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<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-ruby/#rubypos">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<p>
<ruby id="a1">
base
<rtc><rt>annotation1</rt></rtc>
<rtc><rt>annotation2</rt></rtc>
<rtc><rt>annotation3</rt></rtc>
</ruby>
</p>
<script>
for (const value of ['', 'alternate', 'alternate over', 'over alternate']) {
test(() => {
const a1 = document.querySelector('#a1');
a1.style.rubyPosition = value;
const [rt1, rt2, rt3] = a1.querySelectorAll('rt');
assert_rt_is_over(rt1, a1);
assert_rt_is_under(rt2, a1);
assert_rt_is_over(rt3, a1);
a1.style.rubyPosition = '';
}, `ruby-position "${value}" alternate from over`);
}
for (const value of ['alternate under', 'under alternate']) {
test(() => {
const a1 = document.querySelector('#a1');
a1.style.rubyPosition = value;
const [rt1, rt2, rt3] = a1.querySelectorAll('rt');
assert_rt_is_under(rt1, a1);
assert_rt_is_over(rt2, a1);
assert_rt_is_under(rt3, a1);
a1.style.rubyPosition = '';
}, `ruby-position "${value}" alternate from under`);
}
test(() => {
const a1 = document.querySelector('#a1');
const [rtc1, rtc2] = a1.querySelectorAll('rtc');
const [rt1, rt2, rt3] = a1.querySelectorAll('rt');
rtc1.style.rubyPosition = 'under';
assert_rt_is_under(rt1, a1);
assert_rt_is_over(rt2, a1);
assert_rt_is_under(rt3, a1);
rtc1.style.rubyPosition = 'over';
assert_rt_is_over(rt1, a1);
assert_rt_is_under(rt2, a1);
assert_rt_is_over(rt3, a1);
rtc1.style.rubyPosition = 'alternate';
rtc2.style.rubyPosition = 'under';
assert_rt_is_over(rt1, a1);
assert_rt_is_under(rt2, a1);
assert_rt_is_over(rt3, a1);
rtc1.style.rubyPosition = '';
rtc2.style.rubyPosition = '';
}, 'ruby-position alternate from previous ruby text container');
function assert_rt_is_over(rt, ruby) {
assert_true(rt.getBoundingClientRect().top < ruby.getBoundingClientRect().top);
}
function assert_rt_is_under(rt, ruby) {
assert_true(rt.getBoundingClientRect().bottom > ruby.getBoundingClientRect().bottom);
}
</script>
</body>
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