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Test Info:

<!doctype html>
<meta charset="utf-8">
<title>overflow: rtl scroll left should return 0 when overflow size is empty</title>
<link rel="author" href="mailto:perryuwang@gmail.com">
<script src="/css/css-transitions/support/helper.js"></script>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
#rtl-parent {
direction: rtl;
overflow: auto;
width: 300px;
height: 200px;
}
#rtl-child {
width: 500px;
height: 200px;
}
</style>
<div id="rtl-parent">
<div id="rtl-child"></div>
</div>
<script>
promise_test(async () => {
const parent = document.getElementById('rtl-parent');
const child = document.getElementById('rtl-child');
await waitForAnimationFrames(5);
assert_equals(parent.offsetWidth, 300);
assert_equals(parent.offsetHeight, 200);
assert_equals(child.offsetWidth, 500);
assert_equals(child.offsetHeight, 200);
assert_equals(parent.scrollWidth, 500);
assert_equals(parent.scrollHeight, 200);
assert_equals(parent.scrollLeft, 0);
child.style.height = '0px';
parent.style.height = '0px';
await waitForAnimationFrames(5);
assert_equals(parent.offsetHeight, 0);
assert_equals(parent.scrollHeight, 0);
assert_equals(parent.scrollLeft, 0);
}, 'rtl scroll left should be 0 when overflow size is empty');
</script>