<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<div id='container'>
<div id='element'></div>
</div>

<script>
var element = document.getElementById('element');
var container = document.getElementById('container');

test(function() {
    element.style.fontSize = '10px';
    var player = element.animate([{lineHeight: '3em'}, {lineHeight: '5em'}], 10);
    player.pause();
    player.currentTime = 5;
    element.style.fontSize = '20px';
    assert_equals(getComputedStyle(element).lineHeight, '80px');
}, 'lineHeight responsive to style changes');

test(function() {
    element.style.fontSize = '10px';
    var player = element.animate([{lineHeight: '40px'}, {lineHeight: 'calc(40px - 2em)'}], 10);
    player.pause();

    player.currentTime = 5;
    element.style.fontSize = '40px';
    assert_equals(getComputedStyle(element).lineHeight, '20px');

    player.currentTime = 7.5;
    assert_equals(getComputedStyle(element).lineHeight, '10px');
}, 'lineHeight clamped to 0px on keyframes');

test(function() {
    container.style.lineHeight = 'normal';
    var player = element.animate([{lineHeight: 'inherit'}, {lineHeight: '20px'}], 4000);
    player.pause();

    player.currentTime = 1000;
    assert_equals(getComputedStyle(element).lineHeight, 'normal');

    container.style.lineHeight = '100px';
    assert_equals(getComputedStyle(element).lineHeight, '80px');

    container.style.lineHeight = 'normal';
    assert_equals(getComputedStyle(element).lineHeight, 'normal');
}, 'lineHeight responsive to inherited changes from keyword');

test(function() {
    container.style.fontSize = '10px';
    container.style.lineHeight = '1.0';
    const expected = getComputedStyle(container).lineHeight;
    var player = element.animate([{lineHeight: 'inherit'}, {lineHeight: '20px'}], 4000);
    player.pause();

    player.currentTime = 1000;
    getComputedStyle(element).lineHeight;

    container.style.lineHeight = '100px';
    assert_equals(getComputedStyle(element).lineHeight, '80px');
}, 'lineHeight responsive to inherited changes from number');

test(function() {
    container.style.fontSize = '10px';
    container.style.lineHeight = '1';
    var player = element.animate([{lineHeight: 'inherit'}, {lineHeight: '2'}], 4000);
    player.pause();

    player.currentTime = 1000;
    const expected = getComputedStyle(element).lineHeight;

    container.style.lineHeight = '97px';
    assert_equals(getComputedStyle(element).lineHeight, '97px');

    container.style.lineHeight = '1';
    assert_equals(getComputedStyle(element).lineHeight, expected);
}, 'lineHeight responsive to inherited changes from length');

</script>
